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https://github.com/com-lihaoyi/mill
Your shiny new Java/Scala build tool!
https://github.com/com-lihaoyi/mill
build-system build-tool java jvm mill mill-plugin scala scala-js scala-native zinc
Last synced: 12 days ago
JSON representation
Your shiny new Java/Scala build tool!
- Host: GitHub
- URL: https://github.com/com-lihaoyi/mill
- Owner: com-lihaoyi
- License: mit
- Created: 2017-10-17T03:43:19.000Z (about 7 years ago)
- Default Branch: main
- Last Pushed: 2024-04-30T09:48:09.000Z (6 months ago)
- Last Synced: 2024-05-01T12:45:37.436Z (6 months ago)
- Topics: build-system, build-tool, java, jvm, mill, mill-plugin, scala, scala-js, scala-native, zinc
- Language: Scala
- Homepage: https://mill-build.com/
- Size: 192 MB
- Stars: 1,965
- Watchers: 47
- Forks: 297
- Open Issues: 141
-
Metadata Files:
- Readme: readme.adoc
- Contributing: CONTRIBUTING.adoc
- Funding: .github/FUNDING.yml
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.adoc
Awesome Lists containing this project
- awesome-scala-native - Mill - Build tool striving for simplicity, inspired by [Bazel](https://www.bazel.build/). (Build Tools)
README
= image:docs/logo.svg[Mill Logo] Mill
:idprefix:
:idseparator: -
:link-github: https://github.com/com-lihaoyi/mill
:link-current-doc-site: https://mill-build.org
:link-mill-moduledefs: https://github.com/com-lihaoyi/mill-moduledefs
:example-scala-version: 3.3.4
:toc:
:toc-placement: preamble
ifndef::env-github[]
:icons: font
endif::[]
ifdef::env-github[]
:caution-caption: :fire:
:important-caption: :exclamation:
:note-caption: :paperclip:
:tip-caption: :bulb:
:warning-caption: :warning:
endif::[]
{link-github}/actions/workflows/run-tests.yml[image:{link-github}/actions/workflows/run-tests.yml/badge.svg[Build and Release]]
https://index.scala-lang.org/com-lihaoyi/mill/mill-main[image:https://index.scala-lang.org/com-lihaoyi/mill/mill-main/latest.svg[Mill]]
https://www.patreon.com/lihaoyi[image:https://img.shields.io/badge/patreon-sponsor-ff69b4.svg[Patreon]]
Mill is a fast JVM build tool that supports Java and Scala. Mill aims to make your
project’s build process performant, maintainable, and flexible.
== Documentation
If you want to use Mill in your own projects, check out our documentation:
* {link-current-doc-site}[Documentation]
Here is some quick example, so that you can imagine how it looks:
[source,scala,subs="verbatim,attributes"]
----
import mill._, scalalib._
object foo extends ScalaModule {
def scalaVersion = "{example-scala-version}"
}
object bar extends ScalaModule {
def moduleDeps = Seq(foo)
def scalaVersion = "{example-scala-version}"
}
----
If you use Mill and like it, you will probably enjoy the following book by the Author:
* https://www.handsonscala.com/[_Hands-on Scala Programming_]
The remainder of this readme is developer-documentation targeted at people who wish to work on Mill's own codebase.
The developer docs assume you have read through the user-facing documentation linked above.
It's also worth spending a few minutes reading the following blog posts to get a sense of Mill's design & motivation:
* http://www.lihaoyi.com/post/SowhatswrongwithSBT.html["So, what's wrong with SBT?"]
* http://www.lihaoyi.com/post/BuildToolsasPureFunctionalPrograms.html[Build Tools as Pure Functional Programs]
* http://www.lihaoyi.com/post/MillBetterScalaBuilds.html[Mill: Better Scala Builds]
Mill is profiled using the
https://www.ej-technologies.com/products/jprofiler/overview.html[JProfiler Java Profiler], by courtesy of EJ Technologies.
Mill is built using Mill.
To begin, you just need a JVM installed, and the
`./mill` script will be sufficient to bootstrap the project.
== IntelliJ Setup
If you are using IntelliJ IDEA to edit Mill's Scala code, IntelliJ's built in BSP support should
be sufficient to load the Mill project, but you need to set up the file association from
`*.mill` as Scala source files manually in the following settings:
* `Settings` / `Editor` / `File Types` / `Scala`, add the pattern `*.mill`
== Manual & Automated Testing
The following table contains the main ways you can test the code in
`com-lihaoyi/mill`, via manual testing or automated tests:
|===
| Config | Automated Testing | Manual Testing | Manual Testing CI
| In-Process Tests | `main.__.test`, `scalalib.test`, `contrib.buildinfo.test`, etc. | |
| Sub-Process w/o packaging/publishing| `example.\\__.local`, `integration.__.local` | `dist.run` | `test-mill-dev.sh`
| Sub-Process w/ packaging/publishing | `example.\\__.server`, `integration.__.server` | `dist.assembly` | `test-mill-release.sh`
| Bootstrapping: Building Mill with your current checkout of Mill | | `installLocal` | `test-mill-bootstrap.sh`
|===
In general, `println` or `pprint.log` should work in most places and be sufficient for
instrumenting and debugging the Mill codebase. In the occasional spot where `println`
doesn't work you can use `mill.main.client.DebugLog.println` which writes to a file
`~/mill-debug-log.txt` in your home folder. `DebugLog` is useful for scenarios like
debugging Mill's terminal UI (where `println` would mess things up) or subprocesses
(where stdout/stderr may get captured or used and cannot be used to display your own
debug statements).
=== In-Process Tests
In-process tests live in the `.test` sub-modules of the various Mill modules.
These range from tiny unit tests, to larger integration tests that instantiate a `mill.testkit.BaseModule` in-process and a `UnitTester` to evaluate tasks on it.
Most "core" tests live in `main.__test`; these should run almost instantly, and cover most of Mill's functionality that is not specific to Scala/Scala.js/etc..
Tests specific to Scala/Scala.js/Scala-Native live in
`scalalib.test`/`scalajslib.test`/`scalanativelib.test` respectively, and take a lot longer to run because running them involves actually compiling Scala code.
The various `contrib` modules also have tests in this style, e.g.
`contrib.buildinfo.test`
Note that the in-memory tests compile the `BaseModule` together with the test suite, and do not exercise the Mill script-file bootstrapping, transformation, and compilation process.
=== Sub-Process Tests *without* Packaging/Publishing
`example.\\__.local` and `integration.__.local` tests run Mill end-to-end in a subprocess, but *without* the expensive/slow steps of packaging the core packages into an assembly jar and publishing the remaining packages to
`~/.ivy2/local`.
You can reproduce these tests manually using
`./mill dist.run `.
`example` tests are written in a single `build.mill` file, with the test commands written in a comment with a bash-like syntax together with the build code and comments that explain the example.
These serve three purposes:
1. Basic smoke-tests to make sure the functionality works at all, without covering every edge case
2. User-facing documentation, with the test cases, test commands, and explanatory comments included in the Mill documentation site
3. Example repositories, that Mill users can download to bootstrap their own projects
The `integration` tests are similar to `example` tests and share most of their test infrastructure, but with differences:
1. `integration` tests are meant to test features more thoroughly then
`example` tests, covering more and deeper edge cases even at the expense of readability
2. `integration` tests are written using a Scala test suite extending
`IntegrationTestSuite`, giving more flexibility at the expense of readability
You can reproduce any of the tests manually using `dist.run`, e.g.
**Automated Test**
[source,bash]
----
./mill "example.basic[1-simple].local"
----
**Manual Test**
[source,bash]
----
./mill dist.run example/basic/1-simple run --text hello
----
**Manual Test using Launcher Script**
[source,bash]
----
./mill dist.launcher && (cd example/javalib/basic/1-simple && ../../../../out/dist/launcher.dest/run run --text hello)
----
=== Sub-Process Tests *with* Packaging/Publishing
`example.\\__.server`, `integration.__.server`, `example.\\__.fork` and
`integration.__.fork` cover the same test cases as the `.local` tests described above, but they perform packaging of the Mill core modules into an assembly jar, and publish the remaining modules to `~/.ivy2/local`.
This results in a more realistic test environment, but at the cost of taking tens-of-seconds more to run a test after making a code change.
You can reproduce these tests manually using `dist.assembly`:
[source,bash]
----
./mill dist.assembly && (cd example/basic/1-simple && ../../../out/dist/assembly.dest/mill run --text hello)
----
There are two flavors of these tests:
1. `.server` test run the test cases with the default configuration, so consecutive commands run in the same long-lived background server process
2. `.fork` test run the test cases with `--no-server`, meaning each command runs in a newly spawned Mill process
In general you should spend most of your time working with the `.local` version of the `example` and `integration` tests to save time, and only run `.fork`
or `.server` once `.local` is passing.
=== Bootstrapping: Building Mill with your current checkout of Mill
To test bootstrapping of Mill's own Mill build using a version of Mill built from your checkout, you can run
[source,bash]
----
./mill installLocal
ci/patch-mill-bootstrap.sh
----
This creates a standalone assembly at `target/mill-release` you can use, which references jars published locally in your `~/.ivy2/local` cache, and applies any necessary patches to `build.mill` to deal with changes in Mill between the version specified in `.config/mill-version` that is normally used to build Mill and the `HEAD` version your assembly was created from.
You can then use this standalone assembly to build & re-build your current Mill checkout without worrying about stomping over compiled code that the assembly is using.
This assembly is design to work on bash, bash-like shells and Windows Cmd.
If you have another default shell like zsh or fish, you probably need to invoke it with `sh ~/mill-release` or prepend the file with a proper shebang.
If you want to install into a different location or a different Ivy repository, you can set its optional parameters.
.Install into `/tmp`
[source,bash]
----
$ ./mill installLocal --binFile /tmp/mill --ivyRepo /tmp/millRepo
...
Published 44 modules and installed /tmp/mill
----
=== Testing Documentation Changes
For testing documentation changes locally, you can generate documentation for the current checkout via
[source,bash]
----
$ ./mill docs.fastPages
----
To generate documentation for both the current checkout and earlier versions, you can use
[source,bash]
----
$ ./mill docs.localPages
----
=== Troubleshooting
In case of troubles with caching and/or incremental compilation, you can always restart from scratch removing the `out` directory:
[source,bash]
----
rm -rf out/
----
== Project Layout
The Mill project is organized roughly as follows:
=== Core modules that are included in the main assembly
* `runner`, `main.*`, `scalalib`, `scalajslib`, `scalanativelib`.
These are general lightweight and dependency-free: mostly configuration & wiring of a Mill build and without the heavy lifting.
Heavy lifting is delegated to the worker modules (described below), which the core modules resolve from Maven Central (or from the local filesystem in dev) and load into isolated classloaders.
=== Worker modules that are resolved from Maven Central
* `scalalib.worker`, `scalajslib.worker[0.6]`, `scalajslib.worker[1.0]`
These modules are where the heavy-lifting happens, and include heavy dependencies like the Scala compiler, Scala.js optimizer, etc.. Rather than being bundled in the main assembly & classpath, these are resolved separately from Maven Central (or from the local filesystem in dev) and kept in isolated classloaders.
This allows a single Mill build to use multiple versions of e.g. the Scala.js optimizer without classpath conflicts.
=== Contrib modules
* `contrib/bloop/`, `contrib/flyway/`, `contrib/scoverage/`, etc.
These are modules that help integrate Mill with the wide variety of different tools and utilities available in the JVM ecosystem.
These modules are not as stringently reviewed as the main Mill core/worker codebase, and are primarily maintained by their individual contributors.
These are maintained as part of the primary Mill Github repo for easy testing/updating as the core Mill APIs evolve, ensuring that they are always tested and passing against the corresponding version of Mill.
== Compatibility & Stability
Mill maintains backward binary compatibility for each major version (`major.minor.point`), enforced with Mima, for the following packages:
- `mill.api`
- `mill.util`
- `mill.define`
- `mill.eval`
- `mill.resolve`
- `mill.scalalib`
- `mill.scalajslib`
- `mill.scalanativelib`
Other packages like `mill.runner`, `mill.bsp`, etc. are on the classpath but offer no compatibility guarantees.
Currently, Mill does not offer compatibility guarantees for `mill.contrib`
packages, although they tend to evolve slowly.
This may change over time as these packages mature over time.
== Project Maintenance
=== Pull Requests
* Changes to the main branch need a pull request.
Exceptions are preparation commits for releases, which are meant to be pushed with tags in one go
* Merged pull request (and closed issues) need to be assigned to a Milestone
* Pull requests are typically merged via "Squash and merge", so we get a linear and useful history
* Larger pull request, where it makes sense to keep single commits, or with multiple authors may be committed via merge commits.
=== Commit Messages
* The title should be meaningful and may contain the pull request number in parentheses (typically automatically generated on GitHub)
* The description should contain additional required details, which typically reflect the content of the first PR comment
* A full link to the pull request should be added via a line: `Pull request: `
* If the PR has multiple authors but is merged as merge commit, those authors should be included via a line for each co-author: `Co-authored-by: `
* If the message contains links to other issues or pull requests, you should use full URLs to reference them
// tag::changelog[]
== Changelog
ifndef::link-github[]
:link-github: https://github.com/com-lihaoyi/mill
endif::[]
:link-compare: {link-github}/compare
:link-pr: {link-github}/pull
:link-issue: {link-github}/issues
:link-milestone: {link-github}/milestone
// find-replace-regex: https://github.com/com-lihaoyi/mill/pull/(\d*) -> {link-pr}/$1[#$1]
[#0-12-1]
=== 0.12.1 - 2024-10-27
* Fix updating of prompt to match terminal width in client-server mode {link-pr}/3833[#3833]
* Allow `.mill-jvm-opts` to interpolate environment variables, add `.mill-opts` {link-pr}/3841[#3841]
[#0-12-0]
=== 0.12.0 - 2024-10-23
The Mill 0.12.0 release focuses on improving the scalability of Mill builds: in terms
of performance, code organization, adherence to best practices, and community.
Major changes:
1. Mill now runs tasks parallel by default, rather than opt-in. This includes a
new parallel-friendly terminal UI, https://mill-build.org/mill/Mill_Sandboxing.html[task
and test sandboxing] to guard against race conditions,
xref:javalib/testing.adoc#_test_grouping[parallelization of test suites],
and other measures optimizing for parallel builds
2. Mill now uses `build.mill` rather than `build.sc` as the primary file extension, to avoid
confusion with Scala-CLI or Ammonite scripts, and the `T`/`T.worker`/`T.input` syntax
has been deprecated in favor of `Task`/`Task.Worker`/`T.Input` for a more idiomatic style
3. Mill now supports for https://mill-build.org/mill/Structuring_Large_Builds.html[Modularizing Large Builds]
into multiple `package.mill` files, to help support large codebases and incremental compilation
of the build files.
4. Mill now provides official support for https://mill-build.org/mill/Writing_Mill_Plugins.html[Writing Mill Plugins],
with tested workflows and an official testkit to help you write and publish your own Mill
plugins for others to use
5. Mill now supports other JVM langauges: https://mill-build.org/mill/javalib/intro.html[Java],
experimental support for https://mill-build.org/mill/kotlinlib/intro.html[Kotlin/KotlinJs],
and https://mill-build.org/mill/kotlinlib/android-examples.html[even-more-experimental support for Android].
This includes IDE integrations, tooling integrations (docs, autoformatters, linters, testing
frameworks, etc.)
6. The Mill doc-site at https://mill-build.org/ has undergone a massive overhaul.
New comparisons with other build tools of (https://mill-build.org/mill/comparisons/maven.html[Maven],
https://mill-build.org/mill/comparisons/gradle.html[Gradle],
https://mill-build.org/mill/comparisons/sbt.html[SBT]), documentation for
https://mill-build.org/mill/extending/new-language.html[adding new language toolchains]
and https://mill-build.org/mill/extending/running-jvm-code.html[running dynamic JVM code],
and re-organized the pages for Scala/Java/Kotlin by-use-case to make them more navigable
For a more detailed view of Mill changes since 0.11.12, along with migration instructions,
see the sections below on:
* <<0-12-0-RC1>>
* <<0-12-0-RC2>>
* <<0-12-0-RC3>>
* <<0-12-0-since-rc2>>
0.12.x is binary compatible with 0.11.x, and so Mill plugins published for Mill 0.11.x can
continue to be used without updating them. Although binary compatible, Mill 0.12.x does
have breaking changes listed below with instructions provided on how to either disable the
breaking change with a flag or adjust your code to accommodate it. You should download the
latest version of the https://github.com/com-lihaoyi/mill/blob/main/mill[Mill Bootstrap Script]
if you are upgrading from a prior version.
If you need help upgrading from 0.11.x or hit any issues, please visit the
https://discord.com/invite/xJCYRVMS[#mill Discord Channel] or
https://github.com/com-lihaoyi/mill/discussions/3349[0.12.x Github Discussion Thread]. We'd
love to hear from you on your experience with Mill in general and Mil 0.12.x in particular
* *Example Upgrade PRs*
** The following PRs are example upgrades of Mill from 0.11.x to 0.12.0-RC1 for various
projects in the `com.lihaoyi` ecosystem.
*** Trivial upgrades that just needed to bump a version: https://github.com/com-lihaoyi/geny/pull/87 ,
https://github.com/com-lihaoyi/sourcecode/pull/175, https://github.com/com-lihaoyi/fansi/pull/107,
https://github.com/com-lihaoyi/PPrint/pull/141, https://github.com/com-lihaoyi/mainargs/pull/159/files,
https://github.com/com-lihaoyi/fastparse/pull/319, https://github.com/com-lihaoyi/scalatags/pull/284
https://github.com/com-lihaoyi/castor/pull/64, https://github.com/com-lihaoyi/utest/pull/351
*** Less trivial upgrades, needing to make use of `MILL_TEST_RESOURCE_DIR` or other explicit path references to
be compatible with test sandboxing: https://github.com/com-lihaoyi/requests-scala/pull/174,
https://github.com/com-lihaoyi/upickle/pull/627, https://github.com/com-lihaoyi/os-lib/pull/300,
https://github.com/com-lihaoyi/scalasql/pull/30, https://github.com/com-lihaoyi/Ammonite/pull/1575
*** More involved upgrades: https://github.com/com-lihaoyi/cask/pull/143
[#0-12-0-since-rc2]
==== 0.12.0 Changes since RC3
* Mill now takes a lock on the `out/` folder whenver evaluating it to avoid race conditions on disk.
{link-pr}/3599[#3599]. Pass in `--no-build-lock` to disable it at your own risk
* Update Zinc to 0.10.3 to fix issues with over-compilation {link-pr}/3748[#3748]
* `runIvyDeps` is now transitive, as is the newly-introduced `runModuleDeps`,
to try and match the semantics of runtime deps in Maven{link-pr}/3774[#3774]
[#0-12-0-RC3]
==== 0.12.0-RC3 - 2024-10-04
Changes since 0.12.0-RC2
* `-j`/`--jobs` now allows computed values of the form `-j 0.5C` (half as many jobs as cores) or
`-j C-2` (two less jobs than cores) to allow for automatic scaling based on the number of cores available
{link-pr}/3554[#3554]
* Fix `testOnly` handling of ScalaTest tagged tests {link-pr}/3557[#3557]
* Make `./mill` without any arguments point you towards --help, flesh out --help into a cheat sheet {link-pr}/3556[#3556]
* Use `Task` instead of `T` when constructing targets and other tasks {link-pr}/3565[#3565]. The new syntax
(given below) is intended to be more idiomatic Scala and less idiosyncratic. The old syntax will continue
to work for backwards compatibility, but using the new syntax is recommended
** `T {...}` -> `Task {...}`
** `T.command {...}` -> `Task.Command {...}`
** `T.input {...}` -> `Task.Input {...}`
** `T.source {...}` -> `Task.Source {...}`
** `T.sources {...}` -> `Task.Sources {...}`
** `T.persistent {...}` -> `Task(persistent = true) {...}`
** `T.task {...}` -> `Task.Anon {...}`
* Introduced `Task.Command(exclusive = true)` to allow explicit annotation of which
commands need to run without parallelism, allowing `.test` and other commands
to run parallel by default {link-pr}/3617[#3617]
* Lots of added docs for Building Kotlin with Mill:
** Kotlin Build Examples and Linting {link-pr}/3555[#3555], with KtLint and Detekt support
** Kotlin Module Configuration {link-pr}/3585[#3585]
** Publishing and Testing Kotlin with Mill {link-pr}/3589[#3589]
** Using Mill to build a Ktor web server {link-pr}/3621[#3621]
* Additional support for Kotlin tools and frameworks
** KtFmt support {link-pr}/3620[#3620]
** Kover support {link-pr}/3624[#3624]
* Show Worker tasks in `resolve`/`show`/`inspect` {link-pr}/3580[#3580]
* `mill clean` now terminates Worker tasks {link-pr}/3579[#3579]
* Overhaul of the terminal "ticker" UI for displaying task progress to better support
parallel builds {link-pr}/3577[#3577]
** Mill now shows all active tasks and their duration at the bottom of your terminal
** Stream task logs are now prefixed with the task index on the left and the task
name above, so you can attribute each line of logs to the task that generated it
```
...
[3861/4712] main.client.publishLocalCached
[3861] Publishing Artifact(com.lihaoyi,mill-main-client,0.12.0-RC2-67-a566d8-DIRTY875bcbb1) to ivy repo /Users/lihaoyi/.ivy2/local
[3868/4712] runner.client.publishLocalCached
[3868] Publishing Artifact(com.lihaoyi,mill-runner-client,0.12.0-RC2-67-a566d8-DIRTY875bcbb1) to ivy repo /Users/lihaoyi/.ivy2/local
[3869/4712] ======================================= installLocalCache ============================================== 4s
[3676] scalajslib.worker-api.docJar 1s
[3688] scalanativelib.worker-api.docJar 1s
[3706] contrib.playlib.worker[2.9].docJar 1s
[3707] contrib.playlib.worker[2.6].docJar 1s
... and 3 more threads
```
* Add API for tasks to spawn concurrent and parallel futures via `Task.fork.{async,await}` {link-pr}/3478[#3478]
* Allow large test modules with many classes to be broken up to use multiple concurrent JVMs
by overriding `def testForkGrouping` {link-pr}/3478[#3478]
* Use coursier thread pool to run coursier-related tasks to avoid deadlocks {link-pr}/3614[#3614]
* `inspect` now shows useful information when used on modules, not just tasks {link-pr}/3532[#3532]
```
$ ./mill inspect dist0
dist0(build.mill:745)
Version of [[dist]] meant for local integration testing within the Mill
repo. Looks mostly the same as [[dist]], except it does not have a reference
to itself in its [[testTransitiveDeps]], to avoid a circular dependency.
Inherited Modules: MillPublishJavaModule
Module Dependencies: runner, idea
Default Task: dist0.run
Tasks: dist0.fix, dist0.testTransitiveDeps
```
* `mill init` now supports creating a project based on examples from Mill's documentation {link-pr}/3583[#3583],
and unpacks the example into the current folder rather than a subfolder {link-pr}/3626[#3626]
* `MILL_TEST_RESOURCE_FOLDER` has been renamed to `MILL_TEST_RESOURCE_DIR` for consistency with other
environment variable names {link-pr}/3637[#3637]
[#0-12-0-RC2]
==== 0.12.0-RC2 - 2024-09-16
Changes since 0.12.0-RC1
* Support `exclude` attribute in `Dep` parser. You can give exclusions with `;exclude=org:name`
or `;exclude=org:*` or `;exclude=*:name` {link-pr}/3492[#3492]
* Fix `ScalaModule#console` by properly inheriting streams {link-pr}/3500[#3500]
* Adjust codegen to allow custom ``mainargs.TokensReader``s, and include a
`mainargs.TokensReader[os.Path]` by default for convenience {link-pr}/3504[#3504]
* Update to https://github.com/com-lihaoyi/os-lib?tab=readme-ov-file#0-10-7[OS-Lib 0.10.7] to
allow concise multi-segment sub-paths; you can now write `os.pwd / "foo/bar/qux"` rather than
`os.pwd / "foo" / "bar" / "qux"`
* Add `JavaModule.mandatoryJavacOptions`. Those are not propagated to the inner test
traits intentionally, since those options are typically configured by other means,
e.g. dedicated targets. {link-pr}/3503[#3503]
* Add plugins to run Checkstyle and generate reports {link-pr}/3516[#3516]
* Simplified ``PublishModule``'s publishing setup via {link-pr}/3523[#3523]. You can now
run `mill mill.scalalib.PublishModule/` with the proper environment variables (below) and
it should do the right thing by default
** Prefix all environment variables with `MILL_`:
`MILL_SONATYPE_USERNAME`, `MILL_SONATYPE_PASSWORD`,
`MILL_PGP_SECRET_BASE64`, `MILL_PGP_PASSPHRASE` to try and add some
rudimentary ownership and namespacing
* Allow external modules to have a `defaultCommandName` {link-pr}/3545[#3545]. This has
been applied to `ScalafmtModule` and `PublishModule`, so you can
now autoformat your code via `mill mill.scalalib.ScalafmtModule/` and publish it via
`mill mill.scalalib.PublishModule/` without needing the `/reformatAll __.sources`
or `/publishAll __.publishArtifacts` suffix
* Integrated Kotlin integration as a first partly module and add example documentation
{link-pr}/3514[#3514]. This is still pretty spartan, but we expect to flesh it out over time
* Move `.mill.sc` alternate file extension to `.mill.scala` {link-pr}/3521[#3521]
[#0-12-0-RC1]
==== 0.12.0-RC1 - 2024-09-09
* *Breaking Changes*
** Build file overhaul: Mill's build file management has been overhauled to better support
large projects. See https://mill-build.org/mill/Structuring_Large_Builds.html[Structuring Large Builds]
for details
*** Mill now uses `.mill` as its file extension, with some semantic changes
from the old `.sc` files to allow better IDE support. The `.sc` extension is still supported
and its semantics are largely unchanged the ease the migration, but you should convert your Mill
configs to `.mill` files to benefit from Mill's improved IDE experience going forward.
*** The `build.sc` file has been renamed `build.mill` to prevent confusion with Ammonite/Scala-CLI scripts,
and all associated `.sc` files have been renamed to `.mill`.
**** Until IntelliJ-Scala adds support for `.mill` files built in, you can add it yourself via
`Settings / Editor / File Types / Scala` and add the pattern `*.mill`
*** All `.mill` files must have a `package` declaration,
with `package build` for `.mill` files in the root folder and `package build.foo.bar` for `.mill` files in `foo/bar/`.
**** The package declaration remains optional for legacy `.sc` files
*** Only `foo.mill` files in folders directly containing a `build.mill` or `package.mill` can
be imported via `import $file`.
**** You need to create empty `package.mill` files in any folder containing scripts if they are not already
adjacent to your `build.mill` in the root folder
**** `foo.sc` files can continue to be imported from arbitrary paths, to ease in the migration
*** Builds can now be modularized into per-folder definitions by defining `package.mill` files in subfolders
{link-pr}/3213[#3213]. You can no longer define targets and modules in arbitrary `foo.sc` files
**** All target and module definitions must be moved into `package.mill` files in each folder.
*** `$file` references in `.mill` files are now absolute from the project root, and thus `.^` to
refer to parent package is no longer supported, for consistency with other programming environments
**** `$file` references in old `.sc` files are unchanged and continue being relative, preserving the
current behavior.
** ``RootModule``s can only be named `package`, e.g. `object foo extends RootModule` must now be
named ``object `package` extends RootModule``.
*** If you have an existing `RootModule`, you need to rename it ``object `package` extends RootModule``
** Turn on parallelism for task evaluation by default, except for commands
which always run serially at the end {link-pr}/3265[#3265]
*** This can be disabled by passing `--jobs 1`
** Mill uses empty sandbox folders as the working directory for running its own code and
{link-pr}/3367[#3367] and test suites {link-pr}/3347[#3347], to avoid accidental interference
between tasks and tests due to parallelism. See https://mill-build.org/mill/Mill_Sandboxing.html[Mill Sandboxing]
for details
*** This can be disabled by adding `def testSandboxWorkingDir = false` in your test module
** Mill commands now require arguments to be passed named via `./mill mycommand --key value`, rather than
allowing just `./mill mycommand value`. {link-pr}/3431[#3431].
*** You can pass in
`--allow-positional-command-args` to fall back to the old behavior, or use `@mainargs.arg(positional = true)`
on individual parameters
** Dropped support for Java 8, Scala 2.11.x/3.1.x, and Scala-Native 0.4.x, following suit with the rest of the
com-lihaoyi ecosystem. We now expect a minimum of Java 11, Scala 2.12.x/3.2.x, and Scala-Native 0.5.x
** `--disable-callgraph-invalidation` is no longer supported. The flag is still accepted but is
now a no-op.
* *Other Changes*
** Overhaul the Mill client-server protocol to improve robustness
{link-pr}/3363[#3363] {link-pr}/3366[#3366] {link-pr}/3368[#3368] {link-pr}/3370[#3370]
** Mill now has explicitly supported workflows for third-party plugin authors, and
publishes unit, integration, and example test fixtures for writing plugins as `mill-testkit`
{link-pr}/3398[#3398] for downstream plugin authors to use in testing their own Mill extensions.
*** See https://mill-build.org/mill/Writing_Mill_Plugins.html[Writing Mill Plugins] for more details.
*** `mill-testkit` is experimental and does not provide the same stability or binary-compatibility
guarantees as the rest of Mill. Nevertheless, if you are writing Mill plugins, please try it out
and let us know what you think!
** Bump default Sonatype Maven Central publishing timeouts to 10 minutes to avoid
timeouts due to slowness https://github.com/com-lihaoyi/mill/commit/b4c9386b0233fab53a312426715e226e4a7f6302
** Importing Mill projects into IntelliJ via BSP now properly marks the `out/`, `.idea/`, and `.bsp/` folders
as excluded {link-pr}/3329[#3329]
** Optimizations to Mill evaluation logic to reduce fixed overhead of running Mill
on large projects {link-pr}/3388[#3388]
** Improvements to `visualize` and `visualizePlan` such that they no longer need to be
prefixed with `show` and no longer need a separate `graphviz`/`dot` install on Mac-OSX
{link-pr}/3438[#3438]
[#0-11-12]
=== 0.11.12 - 2024-08-20
:version: 0.11.12
:milestone-name: 0.11.12
:milestone: 99
:prev-version: 0.11.11
_Changes since {prev-version}:_
* Bump uTest to 0.8.4 {link-pr}/3340[#3340]
* Manage TestModule dependencies via `build.sc` {link-pr}/3320[#3320]
* Fix the warning not being printed when -i/--interactive/--no-server/--bsp are not the first argument {link-pr}/3346[#3346]
* GenIdea: Make Scala SDK specific for JS / Native {link-pr}/3348[#3348]
* CI: Adapt CI for 0.11.x branch {link-pr}/3350[#3350]
* GenIdea: unroll module dependencies {link-pr}/3358[#3358]
* Print pretty error message when Result.Failure is thrown {link-pr}/3393[#3393]
* Avoid spurious deprecation warnings in generated code {link-pr}/3400[#3400]
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-11-11]
=== 0.11.11 - 2024-08-05
:version: 0.11.11
:milestone-name: 0.11.11
:milestone: 98
:prev-version: 0.11.10
*_We initially tagged `0.11.11` on 2024-11-31 but never published the released due to technical issues. On 2024-08-05 we re-tagged and published `0.11.11`._*
_Changes since {prev-version}:_
* Workaround issue in Sonatype which started failing on double slashes in URLs
(even though they previously worked) https://github.com/com-lihaoyi/mill/commit/a293b46e80e37572bae46ef6225f41f547a5b238[Link]
* Overhaul of the documentation site at https://mill-build.org
* New Java- and Scala-specific sections on the documentation, with more detailed
comparisons to existing build tools
* Added graphviz diagrams throughout to help the user in visualizing the concepts involved
* Update versions of JUnit sbt-test-interface libraries that Mill uses
{link-pr}/3296[#3296]
* Make it simpler to resolve dependencies in custom tasks via `defaultResolver().resolveDeps`
{link-pr}/3330[#3330]
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-11-10]
=== 0.11.10 - 2024-07-23
:version: 0.11.10
:milestone-name: 0.11.10
:milestone: 95
:prev-version: 0.11.9
_Changes since {prev-version}:_
__Fixes and Improvements__
* Improvements in Java docs and user experience {link-pr}/3278[#3278]
* Automatically pump os.proc streams when SystemStreams are redirected {link-pr}/3275[#3275]
* Fix resolution of children of override lazy val modules {link-pr}/3270[#3270]
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-11-9]
=== 0.11.9 - 2024-07-18
:version: 0.11.9
:milestone-name: 0.11.9
:milestone: 94
:prev-version: 0.11.8
_Changes since {prev-version}:_
__New features__
* First class support for Java projects {link-pr}/3261[#3261]
__Fixes and Improvements__
* Add coarse grained lock around BSP request to avoid deadlocks {link-pr}/3243[#3243]
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-11-8]
=== 0.11.8 - 2024-06-21
:version: 0.11.8
:milestone-name: 0.11.8
:milestone: 93
:prev-version: 0.11.7
_Changes since {prev-version}:_
__New features__
* Support Scala Native 0.5.0 {link-pr}/3054[#3054] {link-pr}/3107[#3107] {link-pr}/3120[#3120]
* Add `jvmOptions` to docker contrib configuration {link-pr}/3079[#3079]
* Pass auxiliary class files to zinc, so they are deleted together {link-pr}/3072[#3072]
* BSP: Handle new `JvmCompileClasspath` request {link-pr}/3086[#3086]
* Add support for Cobertura XML report task to help integration {link-pr}/3093[#3093]
* Support Scala.js minify via `scalaJSMinify: T[String]` {link-pr}/3094[#3094]
* Restructure `TestModule`, add `RunModule` {link-pr}/3064[#3064]
* Move `run`-targets into `RunModule` {link-pr}/3090[#3090]
* `TestModule`: Support generation of JUnit-compatible xml report {link-pr}/3099[#3099] {link-pr}/3172[#3172] {link-pr}/3135[#3135] {link-pr}/3184[#3184]
* Use docker image hash to determine if build should rerun {link-pr}/3124[#3124]
* Add multi platform support to contrib.docker through docker buildx {link-pr}/3143[#3143]
* Add ability to re-write ESModule imports at link time {link-pr}/3109[#3109]
* Adding sonatype central support {link-pr}/3130[#3130] {link-pr}/3187[#3187]
* Add `TestModule.discoveredTestClasses` target to ease test inspection {link-pr}/3191[#3191]
* Support "pom" packaging type in `PublishModule` {link-pr}/3222[#3222]
__Fixes and Improvements__
* Restructure `VersionFinder`, increase speed, added ticker messages {link-pr}/3014[#3014]
* Fix bsp compile classpath inconsistencies {link-pr}/3017[#3017]
* Bring more bsp-specific targets in line with their non-bsp versions {link-pr}/3018[#3018]
* Make BSP task processing more resilient {link-pr}/3022[#3022]
* Update example `build.sc` with current library versions {link-pr}/3055[#3055]
* Scoverage: Do not include the scalac plugin in the reporting classpath {link-pr}/3060[#3060]
* Add Scala 2.13.13 and 2.12.19 to supported bridges list {link-pr}/3066[#3066]
* Fix BuildInfo static Java file generator {link-pr}/3074[#3074]
* Scoverage inner module defaults to `skipIdea = outer.skipIdea` {link-pr}/3098[#3098]
* Deduplicate input tasks in `inspect` command {link-pr}/3102[#3102]
* CI: add scalafix-check to precondition to publish {link-pr}/3095[#3095]
* Docs for Continuous cache invalidation {link-pr}/3096[#3096]
* Isolate scoverage modules from their parent modules {link-pr}/3118[#3118]
* Scoverage improve classpath override to the minimal {link-pr}/3122[#3122]
* Improve internal BSP API and docs, fix a match error condition {link-pr}/3111[#3111]
* Retry example integration tests that didn't finish after 5 minutes {link-pr}/3125[#3125]
* Fix mill script for parameter starting with -i {link-pr}/3127[#3127]
* Fixed semanticdb file copying issue, added more tests {link-pr}/3080[#3080]
* Detect assemblies with too many entries to fail shell script prepending {link-pr}/3140[#3140]
* Exclude mill provided dependencies in meta builds {link-pr}/3189[#3189] {link-pr}/3221[#3221]
* Fix Scala.js toolchain logs in server-client mode {link-pr}/3196[#3196]
* Fix compiler bridge build setup and build essential versions in CI {link-pr}/3179[#3179]
* Add Scala 2.13.14 to bridgeScalaVersions {link-pr}/3166[#3166]
* GenIdea improvements {link-pr}/3153[#3153]
* GenIdea: Use synthetic scala-SDK entry for compiler setup {link-pr}/3154[#3154]
* Fix classpath regression in Bloop export #1918 {link-pr}/3211[#3211]
* Support `build.sc` in Bloop {link-pr}/3208[#3208]
* Fail if `testOnly` does not match any test case {link-pr}/3224[#3224]
__Updates and internal changes__
* Code cleanups
* Documentation updates and fixes
* Test and CI improvements
* Updates: acyclic 0.3.12, Ammonite 3.0.0-M2-11-713b6963, asm 9.7,
commons-compress 1.26.2, commons-io 2.16.1, coursier 2.1.10,
fastparse 3.1.0, fansi 0.5.0,
guava 33.2.1,
jarjar-abrams-core 1.14.0, jline 3.26.2, junixsocket 2.9.1,
log4j-core 2.23.1,
mainargs 0.7.0 mill-mima 0.1.1, mill-scalafix 0.4.0,
os-lib 0.10.2,
Play 2.8.22 / 2.9.4 / 3.0.4, pprint 0.9.0, protobuf-java 3.25.3,
Scala 2.12.19 / 2.13.14,
Scala Native 0.4.17 / 0.5.3,
scala-xml 2.3.0,
scalacheck 1.18.0, scalatest 3.2.18, scoverage 2.1.1,
semanticdb-java 0.9.10, semanticdb-scalac 4.9.7
requests 0.8.3,
upickle 3.3.1, utest 0.8.3,
zinc 1.10.0
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-11-7]
=== 0.11.7 - 2024-02-05
:version: 0.11.7
:milestone-name: 0.11.7
:milestone: 91
:prev-version: 0.11.6
_Changes since {prev-version}:_
__New features__
* Support type selectors as path selection syntax in resolve {link-pr}/2997[#2997], {link-pr}/2998[#2998]
* Read coursier default config files to set up repositories and support mirror configuration {link-pr}/2886[#2886], {link-pr}/2917[#2917]
* Added support for `type` attribute when parsing dependencies {link-pr}/2994[#2994]
* Add new `ScalaModule.scalacHelp` command {link-pr}/2921[#2921]
* Add a `ScalaModule.consoleScalacOptions` target {link-pr}/2948[#2948]
* Enable colored output for Scala 2 compiler output {link-pr}/2950[#2950]
* Add `publishLocalCached` and `publishM2LocalCached` targets to `PublishModule` {link-pr}/2976[#2976]
* Support Scala Native build target. This allows to build static and dynamic libraries other than binaries {link-pr}/2898[#2898]
* Prepare the Scala.js integration for SIP-51 {link-pr}/2988[#2988]
__Fixes and Improvements__
* Better detect Windows Subsystem for Linux environments {link-pr}/2901[#2901]
* Avoid evaluating `Task.Input`s twice {link-pr}/2952[#2952]
* Deduplicate (anonymous) tasks in results {link-pr}/2959[#2959]
* Synchronize `evaluateGroupCached` to avoid concurrent access to cache {link-pr}/2980[#2980]
* Properly sanitize Windows reserved names and symbols in evaluator paths {link-pr}/2964[#2964], {link-pr}/2965[#2965]
* Detect colliding cross module values {link-pr}/2984[#2984]
* Mask forward slashes in cross values to fix their cache locations {link-pr}/2986[#2986]
* Re-enable test result summary (print `done` message from test framework to stdout) {link-pr}/2993[#2993]
* Fix overeager caching of `cliImports` value in `generatedScriptSources` {link-pr}/2977[#2977]
* Allow resolving moduleDeps with older Scala 3 versions {link-pr}/2877[#2877]
* GenIdea: Put module dependencies after library dependencies {link-pr}/2925[#2925]
* BSP: do not filter clean-requests for meta-builds {link-pr}/2931[#2931]
* BSP: Add `JavaModule.bspBuildTargetData` to make `JavaModule` reports workable `BuildTarget` {link-pr}/2930[#2930]
* BSP: Send `logMessage` instead of diagnostics when `textDocument` is unknown {link-pr}/2979[#2979]
* Scoverage inner module defaults new to `skipIdea = true` {link-pr}/2989[#2989]
__Updates and internal changes__
* Dependency updates: asm-tree 9.6, bsp4j 2.2.0-M1, coursier 2.1.8, jline 3.25.0, jna 5.14.0, junixsocket-core 2.8.3, log4j-core 2.22.1, mainargs 0.6.1, os-lib 0.9.3, scalafmt 3.7.15, Scala.js 1.15.0, scala-native 8.4.16, semanticdb-java 0.9.8, semanticdb-scala 4.8.15, upickle 3.1.4, zinc 1.9.6
* Contrib dependency updates: Play 2.8.21, Play 2.9.1, Play 3.0.1
* Documentation updates and new sections
* More code cleanups, explicit result types and enforcement of some code quality metrics via mill-scalafix
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-11-6]
=== 0.11.6 - 2023-11-21
:version: 0.11.6
:milestone-name: 0.11.6
:milestone: 90
:prev-version: 0.11.5
_Changes since {prev-version}:_
* Make `PathRef` robust against concurrent filesyste modifications {link-pr}/2832[#2832]
* Use logger error stream for informational messages {link-pr}/2839[#2839]
* Harden assembly logic against Zip-Slip vulnerabilities {link-pr}/2847[#2847]
* Add an option to disable incremental compilation with zinc {link-pr}/2851[#2851]
* Add check for right Tests traits in ScalaJS and Native {link-pr}/2874[#2874]
* Attempt to recover from client/server connection errors to {link-pr}/2879[#2879]
* Fix discovery of targets whose names get mangled {link-pr}/2883[#2883]
* Make `mill show` skip `-j` prefixes to ensure machine readability {link-pr}/2884[#2884]
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-11-5]
=== 0.11.5 - 2023-10-04
:version: 0.11.5
:milestone-name: 0.11.5
:milestone: 89
:prev-version: 0.11.4
_Changes since {prev-version}:_
* Support for Java 21 {link-pr}/2768[#2768]
* Various BSP improvements {link-pr}/2814[#2814], {link-pr}/2813[#2813], {link-pr}/2810[#2810], {link-pr}/2771[#2771]
* The `T.workspace` context path now always points to the top-level project directory, also for meta builds {link-pr}/2809[#2809]
* Mill now better detects and reports logical cycles in inter-module dependencies {link-pr}/2790[#2790]
* Fixed semanticDB data generation for meta builds {link-pr}/2809[#2809]
* The `prepareOffline` command also fetches relevant compiler-bridges for Scala modules {link-pr}/2791[#2791]
* Improved `ScalaJSModule` and added support for `IRFileCache` {link-pr}/2783[#2783]
* The `JavaModule.zincReportCachedProblems` configuration can now also customized via a Java system property {link-pr}/2775[#2775]
* Fixed a file truncation issue in protobuf module and print a warning when proto file get overwritten {link-pr}/2800[#2800]
* Documentation improvements
* Dependency updates: bsp4j 2.1.0-M7, castor 0.3.0, coursier-interface 1.0.19, jarjarabrams 1.9.0, jline 3.23.0, junitsocket 2.8.1, mainargs 0.5.4, scalafmt 3.7.14, Scala.js 1.14.0, semanticdb-java 0.9.6, semanticdb-scala 4.8.10
* Various other improvements and cleanups
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-11-4]
=== 0.11.4 - 2023-09-19
:version: 0.11.4
:milestone-name: 0.11.4
:milestone: 88
:prev-version: 0.11.3
_Changes since {prev-version}:_
* Fix binary incompatibility issue with `Discover` macro's generated generic code {link-pr}/2749[#2749]
* Support the `release-size` mode in `ScalaNativeModule` {link-pr}/2754[#2754]
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-11-3]
=== 0.11.3 - 2023-09-17
:version: 0.11.3
:milestone-name: 0.11.3
:milestone: 87
:prev-version: 0.11.2
_Changes since {prev-version}:_
* Allow Mill CLI to select the meta-build frame it operates on via `--meta-level ` {link-pr}/2719[#2719]
* Improve the `mill resolve` suggestion when a user specifies a target in the wrong module {link-pr}/2731[#2731]
* Fix conflicting dependencies between upstream JavaModules {link-pr}/2735[#2735]
* Fix the scala-library dependency for (generic) platform modules {link-pr}/2739[#2739]
* Fix terminal forwarding in `.console` and `.repl` commands {link-pr}/2743[#2743]
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-11-2]
=== 0.11.2 - 2023-08-28
:version: 0.11.2
:milestone-name: 0.11.2
:milestone: 86
:prev-version: 0.11.1
_Changes since {prev-version}:_
* Target invalidation after making changes to `build.sc` is now done at a fine-grained method-level granularity, using callgraph reachability analysis to see which targets depend on the code that was changed.
See {link-pr}/2417[#2417] for more details
* Fix redirection of stdout stream to stderr when using `show`
{link-pr}/2689[#2689]
* Fix line numbers in errors for scripts starting with leading comments or whitespace {link-pr}/2686[#2686]
* Fix `init` command and support runnig Mill without existing `build.sc` file
{link-pr}/2662[#2662]
* Fixes for BSP editor integration sometimes using the wrong output folder for meta-build metadata, causing subsequent builds from the command line to fail {link-pr}/2692[#2692]
* Added a new `mill.idea.GenIdea/idea` command to generate IntelliJ IDE metadata, improving-upon and replacing the older `mill.scalalib.GenIdea/idea`
command which is now deprecated {link-pr}/2638[#2638]
* Update Coursier to 2.1.6 to mitigate CVE CVE-2022-46751
{link-pr}/2705[#2705]
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-11-1]
=== 0.11.1 - 2023-06-23
:version: 0.11.1
:milestone-name: 0.11.1
:milestone: 85
:prev-version: 0.11.0
_Changes since {prev-version}:_
* `mill.define.Cross`: Introduced default cross segments and some CLI convenience
* `mill.testrunner`: Fixed exception when running ScalaTest or ZIOTest frameworks
* `mill.runner`: Removed some obsolete / defunct cli options
* `mill.runner`: Properly distinct-ify commands when resolving wide matching target patterns
* `mill.scalajslib`: Restored correct defaults for `esFeature`
* `mill.bsp`: Fixed a `MatchError` in the `buildtarget/scalaTestClasses` request
* `mill.contrib.bloop`: Corrected accidentally changed package name resulting in non-functional plugin
* `mill.contrib.scoverage`: Fixed defunct plugin due to a missing type annotation
* Various internal improvements
* Dependency updates: Ammonite 3.3.0-M0-32-96e851cb, bsp4j 2.1.0-M5, zinc 1.9.1
* Mill is now build with Mill 0.11
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-11-0]
=== 0.11.0 - 2023-06-06
:version: 0.11.0
:milestone-name: 0.11.0
:milestone: 84
:prev-version: 0.11.0-M11
*This release is binary incompatible to {prev-version}.*
_Changes since {prev-version}:_
* 0.11.0 is the next breaking version after the 0.10.x series, with a large number of improvements.
See the changelog below for 0.11.0-M1 to 0.11.0-M11 for a full list of user-facing changes.
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
// end::changelog[]
=== Older releases
:leveloffset: +1
// tag::changelogOld[]
[#0-11-0-M11]
=== 0.11.0-M11 - 2023-06-04
:version: 0.11.0-M11
:milestone-name: 0.11.0-M11
:milestone: 83
:prev-version: 0.11.0-M10
*This release is binary incompatible to {prev-version}.*
_Changes since {prev-version}:_
* Make `foo.test` command run tests with user code in the boot classloader, rather than in a sub-classloader
{link-pr}/2561[#2561]
* Mill backend server timeout is now configurable
{link-pr}/2550[#2550]
* Mill assembly is now distributed via Maven Central, rather than Github release assets, to remove an unnecessary single point of failure
{link-pr}/2560[#2560]
* `Tests` inner trait was removed, to avoid trait shadowing which will be removed in Scala 3. Please use `ScalaTests`, `ScalaJSTests`, or
`ScalaNativeTests` instead
{link-pr}/2558[#2558]
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-11-0-M10]
=== 0.11.0-M10 - 2023-05-24
:version: 0.11.0-M10
:milestone-name: 0.11.0-M10
:milestone: 82
:prev-version: 0.11.0-M9
*This release is binary incompatible to {prev-version}.*
_Changes since {prev-version}:_
* Make `mill.define.Module` a `trait` to allow abstract/virtual modules to be ``trait``s rather than ``class``es
{link-pr}/2536[#2536]
* Move `mill.BuildInfo` to `mill.main.BuildInfo` to avoid name conflicts with
`mill.contrib.buildinfo.BuildInfo`
{link-pr}/2537[#2537]
* `PlatformScalaModule` now exposes `platformScalaSuffix` for user code to use
{link-pr}/2534[#2534]
* Add `Agg.when` operator to simplify common workflow of adding optional flags or command line parameters {link-pr}/2535[#2353]
* Generalize handling of test module source folder layout, such that they always match the folder layout of the enclosing module
{link-pr}/2531[#2531]
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-11-0-M9]
=== 0.11.0-M9 - 2023-05-18
:version: 0.11.0-M9
:milestone-name: 0.11.0-M9
:milestone: 80
:prev-version: 0.11.0-M8
*This release is binary incompatible to {prev-version}.*
_Changes since {prev-version}:_
* Overhauled target resolution logic.
It is now significantly lazier, resulting in less of the module tree being un-necessarily instantiated, and also more precise and predictable {link-pr}/2453[#2453]
{link-pr}/2511[#2511]
* Allow tasks to be passed as the CLI parameters of the `run` command, allowing
`run` to be easily used in the implementation of other tasks
{link-pr}/2452[#2452]
* ``Task.Input``s are now watched properly with `--watch`, and trigger re-evaluations when the watched value changes {link-pr}/2489[#2489]
* Support for Java 20 {link-pr}/2501[#2501]
* Broke up `mill.modules` package {link-pr}/2513[#2513], with functionality re-distributed to `mill.util` and `mill.scalalib`
* Overhaul BSP-related code, for improved fidelity and correctness
{link-pr}/2415[#2415]
{link-pr}/2414[#2414]
{link-pr}/2518[#2518]
{link-pr}/2521[#2521]
* Enabled compilation warnings in `build.sc`
{link-pr}/2519[#2519]
* Print out the CLI flags when inspecting ``Task.Command``s
{link-pr}/2522[#2522]
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-11-0-M8]
=== 0.11.0-M8 - 2023-04-24
:version: 0.11.0-M8
:milestone-name: 0.11.0-M8
:milestone: 79
:prev-version: 0.11.0-M7
*This release is binary incompatible to {prev-version}.*
_Changes since {prev-version}:_
* Added an https://github.com/com-lihaoyi/mill/tree/main/example[example/]
folder in the Mill repo, containing common build setups demonstrating Mill features with explanations of how each feature works
* Pre-compiled Scala incremental compiler interface
{link-pr}/2424[#2424], to speed up clean builds
* Add some helpers to simplify cross-version/cross-platform modules {#2406}[{link-pr}/2406]
* You can now override `T{...}` ``Target``s with `Task.Source` or `Task.Sources`, and vice versa {link-pr}/2402[#2402]
* Removed the Ammonite script runner dependency used to evaluate `build.sc`
files and instead compile them using Mill {link-pr}/2377[#2377]
* Add `TestModule.ZioTest` {link-pr}/2432[#2432]
* Caching fixes for external modules https://github.com/com-lihaoyi/mill/issues/2419[#2419]
* Overhaul of the Mill `BuildInfo` plugin, moving the key-value into resources to avoid needing to re-compile your module when the values change, adding
`JavaModule` support, and allowing Javadoc/Scaladoc comments to be associated with the generated `BuildInfo` constants {link-pr}/2425[#2425]
* Global Configuration via `~/.mill/ammonite/predefScript.sc` is no longer supported in this version.
If that breaks your workflow, please report and tell us your use case so we can provide sufficient replacement or support for your use case before Mill 0.11.
* Overhaul of the documentation.
Created many executable example projects which are included in the documentation and run/tested on CI
* Change cross module definitions to be traits instead of classes, for greater regularity and less builerplate at call sites. _This change requires slight modification to existing build scripts that define cross modules._
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-11-0-M7]
=== 0.11.0-M7 - 2023-03-30
:version: 0.11.0-M7
:milestone-name: 0.11.0-M7
:milestone: 78
:prev-version: 0.11.0-M6
*This release is binary incompatible to {prev-version}.*
_Changes since {prev-version}:_
* Introduced automatic `PathRef` validation for cached targets; default-enabled it for `CoursierModule.resolveDeps` and various `resolvedIvyDeps` targets
* `bsp`: Update Protocol version to 2.1.0-M4
* `bsp`: Support new `mainClasses` field in run and test environments
* `bsp`: Fixed handling of Mill plugins and other improvements
* `scalanativelib`: new `nativeDump` setting in `ScalaNativeModule`
* `contrib.twirllib`: Use newer scala-parser-combinators version when used with Scala 3
* `contrib.scalapblib`: Added new flag to search for proto files in dependencies
* Various refactorings to improve binary compatibility
* Updated dependencies: Ammonite 3.0.0-M0-5 coursier 2.1.0, scala native tools 0.4.12, semanticdb 4.7.6, trees 4.7.6, upickle 3.0.0
* DX improvements
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-11-0-M6]
=== 0.11.0-M6 - 2023-03-09
:version: 0.11.0-M6
:milestone-name: 0.11.0-M6
:milestone: 77
:prev-version: 0.11.0-M5
*This release is binary incompatible to {prev-version}.*
_Changes since {prev-version}:_
* `main`: Re-added missing `--color` and `predef` cli arguments.
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-11-0-M5]
=== 0.11.0-M5 - 2023-03-09
:version: 0.11.0-M5
:milestone-name: 0.11.0-M5
:milestone: 76
:prev-version: 0.11.0-M4
*This release is binary incompatible to {prev-version}.*
_Changes since {prev-version}:_
* `Cross` is no longer adding the cross parameters to the `millSourcePath`.
+
_You should review your cross modules setups to avoid build issues like incorrect source paths or missing files. ``CrossScalaModule`` is not affected by this change._
* API refactorings: `PathRef`, moved `JarManifest` to `mill.main`
* No longer inherit the Ammonite CLI config
* `scalalib`: Fixed loosing customized `mapDependencies` when `ScalaModule` get mixed in after
* `scalalib`: New `TestModule.Weaver`
* `scalajslib`: New `JsEnvConfig.Selenium`
* `testrunner`: Fixed concurrency issue with test event reporting
* Updated dependencies: ammonite 3.0.0-M0-3, coursier 2.1.0-RC6, jarajar-abrams-core 1.8.2, lambdatest 0.8.0, log4j-core 2.20.0, os-lib 0.9.1, scoverage 2.0.8, semanticdb-scalac 4.7.5, trees 4.7.5
* Documentation updates
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-11-0-M4]
=== 0.11.0-M4 - 2023-02-10
:version: 0.11.0-M4
:milestone-name: 0.11.0-M4
:milestone: 74
:prev-version: 0.11.0-M3
*This release is binary incompatible to {prev-version}.*
_Changes since {prev-version}:_
* `scalalib`: New configuration target `zincReportCachedProblems` which, when `true`, enables reporting of all found problems, even for files which were not re-compiled
* `scalalib`: Improved SemanticDB support for Java and Scala
* `scalalib`: Mitigate another coursier download issue
* `scalajslib`: Fetch more tooling dependencies in `prepareOffline`
* `scalanativelib`: Fetch more tooling dependencies in `prepareOffline`
* `scalanativelib`: Updated tools to version 0.4.10
* `bsp`: Improved support for the `mill-build` module which should improve the editing experience for `build.sc` and other build files
* Cleanups and internal improvements
* Updated dependencies: Ammonite 3.0.0-M0-1, junixsocket 2.6.2, semanticdb-java 0.8.13, upickle 3.0.0-M2
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-11-0-M3]
=== 0.11.0-M3 - 2023-01-23
:version: 0.11.0-M3
:milestone-name: 0.11.0-M3
:milestone: 73
:prev-version: 0.11.0-M2
*This release is binary incompatible to {prev-version}.*
_Changes since {prev-version}:_
* Slightly changed the `out/` folder layout for overridden and private tasks.
Instead of `foo.overridden` we now use a `foo.super` path to hold the metadata and scratch files.
* Fixed the caching for private targets with same name but defined in different super traits.
* Fixed non-functional `clean` command when used with arguments denoting modules.
* `scalalib`: Fixed `GenIdea` issues on Windows, when the build uses plugins or additional libraries.
* `scalajslib`: `ScalaJSModule.ScalaJSTests` now extends `ScalaModule.ScalaTests` which improves consistency, better default values and compatibility with other modules like `ScoverageModule`.
* `scalanativelib`: `ScalaNativeModule.ScalaNativeTests` now extends `ScalaModule.ScalaTests` which improves consistency, better default values and compatibility with other modules.
* `contrib.gitlab`: Improved error handling for token lookup and documentation.
* Updated dependencies: coursier 2.1.0-RC5, jna 5.13.0, semanticdb-scala 4.7.3, trees 4.7.3
* Documentation improvements
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-11-0-M2]
=== 0.11.0-M2 - 2023-01-13
:version: 0.11.0-M2
:milestone-name: 0.11.0-M2
:milestone: 72
:prev-version: 0.11.0-M1
*This release is binary incompatible to {prev-version}.*
_Changes since {prev-version}:_
* Splitted BSP module into `mill.bsp` and `mill.bsp.worker` and removed various dependencies (guava, bsp4j, xtends, lsp4j, ...) from Mill API
* `scalalib`: Added support to generate semanticdb data for Java source files
* `scalajslib`: Added support for `scalaJSOutputPattern`
* `scalajslib`: Added suport for `scalaJSSourceMap`
* `scalajslib`: Dropped support for Scala.js 0.6
* Updated dependencies: ammonite 2.5.6, coursier 2.1.0-RC4, semanticdb 4.7.1, requests 0.8.0, scalafmt 3.6.1, trees 4.7.1, upickle 3.0.0-M1, utest 0.8.1
* Various internal cleanups and improvements
* Documentation improvements
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-11-0-M1]
=== 0.11.0-M1 - 2022-12-17
:version: 0.11.0-M1
:prev-version: 0.10.10
:milestone: 70
:milestone-name: 0.11.0-M1
*This release is binary incompatible to {prev-version}.*
_Changes since {prev-version}:_
* Greatly improved dependency resolution between modules, making it possible to mix Java and Scala modules
* `main`: Restrict `Cross` parameter to be of type `Module`
* `scalalib`: Performance improvements in Zinc worker module
* `scalalib`: Resources are no longer added to `compileClasspath`.
* `scalalib`: Added new `compileResources` which will end up in `compileClasspath`
* `scalalib`: Consolidated artifact and platform suffix handling
* `scalajslib` : Performance improvements in worker module
* `scalanativelib` : Performance improvements in worker module
* Updated dependencies: coursier 2.1.0-RC3, os-lib 0.9, scala 2.12.17, trees 4.7.0
* Removed lots of deprecated API
* Various internal cleanups and improvements
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-10-15]
=== 0.10.15 - 2024-01-07
:version: 0.10.15
:milestone-name: 0.10.15
:milestone: 92
:prev-version: 0.10.13
_Changes since {prev-version}:_
* Make `semanticDbEnablePluginScalacOptions` protected and thus accessible for downstream use and customization
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-10-13]
=== 0.10.13 - 2023-11-12
:version: 0.10.13
:milestone-name: 0.10.13
:milestone: 81
:prev-version: 0.10.12
_Changes since {prev-version}:_
This version especially aids the transition from Mill 0.10 to Mill 0.11.
* Backport of Java 20 compatibility
* Deprecated `mill.define.SelectMode.Single`
* Backport of `mill.eval.Evaluator.evalOrThrow`
* Deprecated all inner `Tests` traits of modules derived from `JavaModule` and provide type aliases to use their successors
* Dependency updates: Ammonite 2.5.11, Coursier 2.1.7, jarjar-abrams 1.9.0, Junixxocket 2.8.2, Play 2.8.21, Scalameta Trees 4.8.12, Scala Native 0.4.16, Scoverage 2.0.11, Zinc 1.9.5
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-10-12]
=== 0.10.12 - 2023-03-20
:version: 0.10.12
:milestone-name: 0.10.12
:milestone: 75
:prev-version: 0.10.11
_Changes since {prev-version}:_
* `scalalib`: Mitigate another coursier download issue (backported from 0.11.0-M4)
* `testrunner`: Fixed a concurrency issue with test event reporting (backported from 0.11.0-M5)
* `scalajslib`: Deprecated `fastOpt` and `fullOpt`
* Updated dependencies: coursier 2.1.0, jarjar-abrams 1.8.2, jna 5.13.0, junixsocket 2.6.2, log4j-core 2.20.0, scalafmt-dynamic 3.6.1, trees 4.7.6
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-10-11]
=== 0.10.11 - 2023-01-24
:version: 0.10.11
:milestone-name: 0.10.11
:milestone: 71
:prev-version: 0.10.10
_Changes since {prev-version}:_
* Fixed non-functional `clean` command when used with arguments denoting modules.
* `scalalib`: Fixed `GenIdea` issues on Windows, when the build uses plugins or additional libraries.
* `scalajslib`: Performance improvements in worker module
* `scalajslib`: Pass more settings from `ScalaJSModule` to its `Tests`
+
_If you have issues after the update (like `org.scalajs.jsenv.UnsupportedInputException`, https://github.com/com-lihaoyi/mill/issues/2300), check your settings in the test modules for consistency._
* Some internal improvements backported from `0.11.0-M3`
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-10-10]
=== 0.10.10 - 2022-12-06
:version: 0.10.10
:prev-version: 0.10.9
:milestone: 69
:milestone-name: 0.10.10
After this release, the `main` branch is open for development of the next major version of Mill, which is probably `0.11`.
Further maintenance work will happen in the `0.10.x` branch.
_Changes since {prev-version}:_
* Lots of documentation improvements, additions and restructurings
* `core`: Fixed some rare issues with reading the `.mill-jvm-opts` file
* `core`: We made slight adaptions to the `T.dest` location of target defined in included files, to fix potential colliding cache locations
* `scalalib`: JAR archives created by Mill now by default contain directory entries
* `scalalib`: Updated zinc to 1.8.0
* `scalajslib`: Added support for more `JsEnv` providers
+
_If you get some issues (like `connect ECONNREFUSED`, https://github.com/com-lihaoyi/mill/issues/2204) after the update, review your settings for `JsEnv` providers._
* `scalanativelib`: Support for incremental compilation since Scala Native 0.4.9
* `contrib.testng`: The TestNG library is no longer provided transitively; you need to provide it explicitly
* `contrib.bloop`: Fixed re-generation of bloop config dir; previously, it could happen, that there where no config files at all
* `BSP`: implement `buildTarget/OutputPaths` request
* Various version bumps and internal improvements
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-10-9]
=== 0.10.9 - 2022-11-10
:version: 0.10.9
:prev-version: 0.10.8
:milestone: 68
:milestone-name: 0.10.9
_Changes since {prev-version}:_
* **Hardened Maven and Ivy artifact handling to prevent path-traversal attacks** (see https://github.com/advisories/GHSA-wv7w-rj2x-556x[CVE-2022-37866]), also updated coursier dependency to a non-vulnerable version
* Decoupled `mill-moduledefs` module into a {link-mill-moduledefs}[separate project], to better suite compiler plugin packaging and improve support for various Scala versions
* Applied more workarounds to coursier concurrency issues to make parallel builds more robust
* Added support for newer Scala versions in `GenIdea` (2.2 and 2.3)
* Fixed an issue where `PublishModule` dropped module dependencies when mixed-in after other trait which overrode `moduleDeps`
* new `JMH` contrib plugin
* Lots of internal improvements and dependency updates
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-10-8]
=== 0.10.8 - 2022-10-10
:version: 0.10.8
:prev-version: 0.10.7
:milestone: 67
:milestone-name: 0.10.8
_Changes since {prev-version}:_
* Improvements for better Scala 3.2 support
* Fixed non-working default commands in cross modules
* `CoursierModule`: mitigate more download failure situations (e.g. checksum failures)
* `PublishModule`: properly show `gpg` output in server mode
* `BSP`: Better compiler message handling (`logMessage` instead of `showMessage`) and support for diagnostic code
* `ScoverageModule`: Support for Scoverage 2.x
* New contrib module `GitlabPublishModule`
* Various internal improvements and version bumps
* Documentation improvements
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-10-7]
=== 0.10.7 - 2022-08-24
:version: 0.10.7
:prev-version: 0.10.6
:milestone: 66
:milestone-name: 0.10.7
_Changes since {prev-version}:_
* Don't print unwanted debug messages from zinc
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-10-6]
=== 0.10.6 - 2022-08-24
:version: 0.10.6
:prev-version: 0.10.5
:milestone: 64
:milestone-name: 0.10.6
_Changes since {prev-version}:_
* ``PathRef``s sigs are now more reproducible and independent of the used filesystem
* `JavaModule` can now use a non-local Java Compiler to support all options
* `Logger`: new `debugEnabled` to detect whether debug logging is enabled
* New `testkit` module, to use `UnitTester` in external projects
* Fixed reading of `.mill-jvm-opts` in server mode
* BSP: Automatic SemanticDB enablement to improve Metals support
* `mill.twirllib.TwirlModule` - new mandatory target `twirlScalaVersion` to configure the Scala version used by Twirl compiler, and support for newer versions
* Lots of documentation updates and additions
* Upgraded to Zinc 1.7.1 and various other dependency updates
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-10-5]
=== 0.10.5 - 2022-07-01
:version: 0.10.5
:prev-version: 0.10.4
:milestone: 63
:milestone-name: 0.10.5
_Changes since {prev-version}:_
* New `init` command, to create new Mill projects from Gitter8 (g8) templates
* `PathRef` now gracefully ignores socket files.
This also fixes an annoying issue when Mill was previously ran in a source directory.
* Fixed a bug with using `mill --repl` without any further arguments, which was introduced in Mill 0.10.2 and prevented proper no-server mode
* Fixed the `visualize` command which wasn't working on some newer JREs
* Improved Mill server support for Windows 11 and some Windows Server versions
* `ScalaModule` / `ZincWorkerModule`: Fixed incremental compilation issue with JRE 17 (and probably others)
* `TestModule` now better supports JUnit5 test suites
* `ScalaJsModule`: internal improvements to the stability of the Scala.js linker
* `ScalaNativeModule`: Added support for `nativeEmbedResources`
* `BSP`: improved handling of the `mill-build` module when the BSP client is IntelliJ IDEA
* Documentation updates and link fixes
* Various dependency updates
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-10-4]
=== 0.10.4 - 2022-05-06
:version: 0.10.4
:prev-version: 0.10.3
:milestone: 62
:milestone-name: 0.10.4
_Changes since {prev-version}:_
* Switched from ipcsocket to junixsocket library to enhance the robustness of Mill client server communication.
This should greatly improve the user experience on Windows.
* Internal improvements and better support of GraalVM
* The Mill Documentation site has now built-in search functionality
* `ScalaJsModule`: New targets `fastLinkJS` and `fullLinkJS` and deprecated `fastOpt` and `fullOpt`
* `ScalaJsModule`: Support for `ModuleSplitStyle`
* `BSP`: Updated to protocol version 2.1.0-M1, added support for test framework names and support for the JVM extension
* `GenIdea`: More consistent ordering of libraries and dependent modules and support for Scala 3.1 language level
* `Bloop`: Added support for runtime dependencies
* Enhanced test suite to cover Mill client server scenarios
* Various dependency updates
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-10-3]
=== 0.10.3 - 2022-04-11
:version: 0.10.3
:prev-version: 0.10.2
:milestone: 61
:milestone-name: 0.10.3
_Changes since {prev-version}:_
* Fixed `import $file` for files with hyphens and other symbols in its name
* Fixed an issues with truncated output just before Mill finishes
* Mill commands now support arguments of type `Task[T]`, which can improve writing re-usable commands, especially, they can be called from other tasks more easily
* `JavaModule`: Improved correctness and performance of `compileClasspath` and `bspCompileClasspath` targets.
This fixes an issue with BSP for large projects.
Also, compile-time dependencies no longer sneak into the classpath transitively.
* `JavaModule`: Added `docJarUseArgsFile` target and fix issue with Windows command length restrictions in `docJar`
* `BSP` and `Bloop`: Better detect foreign modules
* Various internal API refinements and improvements
* Reorganized integration test suite and build setup
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-10-2]
=== 0.10.2 - 2022-03-18
:version: 0.10.2
:prev-version: 0.10.1
:milestone: 60
:milestone-name: 0.10.2
_Changes since {prev-version}:_
* Mill workers can now implement `AutoCloseable` to properly free resources
* `ScalaModule`: Fixed `repl` start
* `CoursierModule`: Fixed concurrent download issues with coursier (we detect and retry)
* `MainModule`: Fixed potential match error with `show` and `showNamed`
* Restructured contrib module documentation
* Internal improvements
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-10-1]
=== 0.10.1 - 2022-03-08
:version: 0.10.1
:prev-version: 0.10.0
:milestone: 59
:milestone-name: 0.10.1
_Changes since {prev-version}:_
* `MillClienMain` can now act as universal main to start mill with or without a server process
* Improved `show` command that always returns valid JSON
* Added `showNamed` command that includes the task names in the output
* Implemented more granular cache invalidation which keeps more caches intact when you split your build setup over multiple `.sc` files with `import $file`.
* The local `.mill-jvm-opts` file is no longer restricted to `-X` options
* `CoursierModule`: Added `coursierCacheCustomizer` to support a `FileCache` customizers
* `JavaModule`: the `docJar` target no longer includes hidden files
* `ScalaModule`: Updated to latest zinc version
* `ScalaModule`: Reworked scalac plugins handling for the better and to support Scala 3
* `ScalaNativeModule`: fixed `Dep.withDottyCompat` behavior
* `ScalaJSModule`: support for linking multiple modules
* `ScalafmtModule`: Support for newer Scalafmt versions
* Tool chain: Update to Mill 0.10.0
* Tool chain: we no longer create files outside the mill project directory (e.g. `~/mill-release` is now under `target/mill-release`)
* Various dependency updates
* Lots of internal improvements
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-10-0]
=== 0.10.0 - 2022-01-14
:version: 0.10.0
:prev-version: 0.10.0-M5
:milestone: 57
:milestone-name: 0.10.0
_Changes since {prev-version}:_
* Changed structure of `out` directory, `out/foo/dest` is now `out/foo.dest`
* Fixed issues with loading of predef scripts
* `--watch` now supports manual re-runs by pressing enter
* Improved subprocess handling
* Published poms can now contain properties and `versionScheme` information
* Improved Scala.js support, including more target configuration options and support for Node 17
* Improved Scala Native for version > 0.4.2 and support Scala 3
* Internal improvements, fixes and dependency version updates
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-10-0-M5]
=== 0.10.0-M5 - 2021-12-18
:version: main
:prev-version: 0.10.0-M4
:milestone: 55
:milestone-name: 0.10.0-M5
*This release breaks binary compatibility for external plugins.*
_Changes since {prev-version}:_
* Fixed Log4Shell security vulnerability in `ZincWorkerModule` (CVE-2021-44228)
* Factored out the testrunner into a new module, which also fixes some potential classloader issues when executing tests (e.g. with JNA)
* Removed the limitation of max 22 inputs for tasks
* `--watched` commands can now re-run when pressing enter-key
* task and arguments of commands can now have hyphens in their name
* Reworked and decluttered the out-folder structure
* `prepareOffline` now has a `all` flag to control if all or only some dependency should be prefetched
* Made caching more effective for targets overridden in stackable-traits
* Further BSP improvements, esp. for Metals and Scala 3
* Lots of other internal improvements and fixes
* Various dependency updates
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-10-0-M4]
=== 0.10.0-M4 - 2021-11-08
:version: 0.10.0-M4
:prev-version: 0.10.0-M3
:milestone: 54
:milestone-name: 0.10.0-M4
_Changes since {prev-version}:_
* BSP support rework and overhaul of built-in BSP server
* GenIdea: failures when inspecting and resolving the build are not properly reported
* Coursier: we now implemented a workaround to tackle concurrent downloads issues
* New `+` separator to provide multiple targets (with parameters) via cmdline
* New `--import` cmdline option to run ad-hoc plugins without editing of `build.sc`
* New `T.ctx().workspace` API to access the project root directory
* Various internal improvements and bug fixes
* Various refactorings and cleanups
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-1-0-M3]
=== 0.10.0-M3 - 2021-09-29
:version: 0.10.0-M3
:prev-version: 0.10.0-M2
:milestone: 53
:milestone-name: 0.10.0-M3
*This is a milestone release.
This release breaks binary compatibility for external plugins build for mill 0.9.x.
The API is suspected to change before a 0.10.0 releae.*
_Changes since {prev-version}:_
* `ScalaModule with PublishModule`: the `scala-library` artifact is now always part of the dependencies in published `pom.xml`s and `ivy.xml`s
* New `JavaModule.mandatoryIvyDeps` target to provide essential dependencies like scala-library without forcing the user to call `super.ivyDeps`
* `ScalaJSModule.scalaLibraryIvyDeps` no longer contains the scala-js-library, but only the scala-library; if you need that, use `ScalaJSModule.mandatoryIvyDeps` instead.
* `import $ivy` support `$MILL_BIN_PLATFORM` variable and a new sort notations for external plugins
* We fixed and enabled lots of tests to run on Windows
* Some generic targets like `plan` or `path` now also return their output
* `GenIdea`: improved support for Scala 3 projects *
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-10-0-M2]
=== 0.10.0-M2 - 2021-09-17
:version: 0.10.0-M2
:prev-version: 0.9.9
:milestone: 51
:milestone-name: 0.10.0-M2
*This is a early milestone release.
This release breaks binary compatibility for external plugins build for mill 0.9.x.
The API is suspected to change before a 0.10.0 releae.*
_Changes since {prev-version}:_
* Removed deprecated API
* `ScalaModule`: added `mandatoryScalacOptions` to avoid the common issue that users forget to include mandatory options when defining their own.
* Renamed `toolsClasspath` targets found in various modules to avoid hard to resolve clashes when mixing traits
* Fixed and improved our test suite on Windows
* Various fixes and improvements
* Various dependency updates
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-9-12]
=== 0.9.12 - 2022-01-07
:version: 0.9.12
:prev-version: 0.9.11
:milestone: 58
:milestone-name: 0.9.12
* fixed parsing of command parameters in `show` command
* zinc worker: Updated log4j2 to 2.17.1
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-9-11]
=== 0.9.11 - 2021-12-15
:version: 0.9.11
:prev-version: 0.9.10
:milestone: 56
:milestone-name: 0.9.11
* zinc worker: Updated log4j2 to 2.16.0 to fix Log4Shell (CVE-2021-44228) vulnerability
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-9-10]
=== 0.9.10 - 2021-11-13
:version: 0.9.10
:prev-version: 0.9.9
:milestone: 52
:milestone-name: 0.9.10
* Some feature backports from mill 0.10
* New `+` separator to provide multiple targets (with parameters) via cmdline
* New `--import` cmdline option to run ad-hoc plugins without editing of `build.sc`
* `import $ivy` support `$MILL_BIN_PLATFORM` variable and a new sort notations for external plugins
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-9-9]
=== 0.9.9 - 2021-07-15
:version: 0.9.9
:prev-version: 0.9.8
:milestone: 50
:milestone-name: 0.9.9
_Changes since {prev-version}:_
* BSP: Fixed/improved source item for root project
* Bloop: Prevent compilation during bloop config generation
* GenIdea: Fix content path of root project (mill-build)
* Various version bumps
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-9-8]
=== 0.9.8 - 2021-05-27
:version: 0.9.8
:prev-version: 0.9.7
:milestone: 49
:milestone-name: 0.9.8
_Changes since {prev-version}:_
* Fixed some potential binary incompatibilities with external plugins (builds against older os-lib versions)
* Fixed location and configuration of mills home path (used for caching of build scripts)
* Properly close jar resources - should fix issues in `assembly`, esp. on Windows where open resources are locked
* BSP: Repaired mills BSP server
* playlib: Fixed issues with the play-contrib module and added support for Play 2.8
* GenIdea: changed dir for generated mill modules to `.idea/mill_modules`
* Various version bumps, including Scala 2.13.5
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-9-7]
=== 0.9.7 - 2021-05-14
:version: 0.9.7
:prev-version: 0.9.6
:milestone: 48
:milestone-name: 0.9.7
_Changes since {prev-version}:_
* `ScalaModule`: Support for Scala 3
* `CoursierModule`: Support customized dependency resolution (needed to work with ScalaFX)
* `TestModule`: Added new `testFramework` target and only support one test framework.
Deprecated `testFrameworks` targets.
* `TestModule`: Added new convenience traits to configure popular test frameworks, e.g. `TestModule.Junit4`, `TestModule.ScalaTest`, `TestModule.Utest` and many more
* `Bloop`: Added support for foreign modules
* Better support for Windows environments
* Various internal improvements, cleanups, and deprecations
* Various dependencies updates
* Removed tut contrib module because of unmaintained/archived upstream dependency
_For details refer to
{link-milestone}/{milestone}?closed=1[milestone {milestone-name}]
and the {link-compare}/{prev-version}\...{version}[list of commits]._
[#0-9-6]
=== 0.9.6 - 2021-04-03
_The mill project home and repository has been moved to https://github.com/com-lihaoyi/mill._
* `repl` and `console` targets now support `forkArgs` and `forkEnv`
* Support for Scala 3 release candidates and new Scaladoc 3 tool
* Support for Scala.js on Scala 3
* Scala Native improvements
* Test runner now uses an args file to support running tests on Windows
* GenIdea: better supports source jars, full config contributions and provided/runtime dependencies
* Various dependency updates
* Documentation site reworked to support multiple release versions
* Improved CI setup to better test mill on Windows
_For details refer to
{link-milestone}/47?closed=1[milestone 0.9.6]
and the {link-compare}/0.9.5\...0.9.6[list of commits]._
[#0-9-5]
=== 0.9.5 - 2021-01-26
* Updated zinc to 1.4.4
* Support for Scala Native 0.4.0
* Support for Scala.js ESModule (including Bloop support)
* Inner `Tests` traits in modules like `JavaModule`, `ScalaModule` and others now have unique names (`JavaModuleTests`, `ScalaTests`, etc), to allow for easier customization
* Various version bumps of dependencies
* CI now runs all tests, it did miss some before
_For details refer to {link-milestone}/46?closed=1[milestone 0.9.5]
and the link:{link-compare}/0.9.4\...0.9.5[list of commits]._
[#0-9-4]
=== 0.9.4 - 2020-12-21
* Implemented more BSP protocol commands and fixed some glitches with IntelliJ
* Stabilized CI builds
* Various fixes and improvements
* Various version bumps
_For details refer to {link-milestone}/45?closed=1[milestone 0.9.4]
and the {link-compare}/0.9.3\...0.9.4[list of commits]._
[#0-9-3]
=== 0.9.3 - 2020-11-26
_(We also tagged `0.9.0`, `0.9.1`, and `0.9.2`, but due to release difficulties, we ask you not to use them.)_
* Replace the built in `@main` method functionality with the
https://github.com/lihaoyi/mainargs[MainArgs] library
* Note that the MainArgs replacement has some backwards incompatibilities: Short flags like `-i` can no longer be passed via `--i`, the `@doc("")` is now `@arg(doc = "")`, `Seq[T]` parameters are now passed via repeated `--foo`
flags rather than comma-separated.
* Add the ability to relocate/shade files in `.assembly` {link-pr}/947[#947]
* Twirl enhancements {link-pr}/952[#952]
* Add `scalacPluginClasspath` to Tests {link-pr}/956[#956]
* Add `toMap` methods to `BuildInfo` {link-pr}/958[#958]
* Bump coursier to version 2.0.0 {link-pr}/973[#973]
* Make BSP support a first-class citizen {link-pr}/969[#969]
* Omit the suffix in `artifactName` in cross modules {link-pr}/953[#953]
* Allow test classes with constructor parameters {link-pr}/982[#982]
* Proguard contrib module {link-pr}/972[#972]
* Support Scala.js useECMAScript2015 option and ModuleKind.ESModule
{link-pr}/1004[#1004]
* Support Scala.js incremental linking
{link-pr}/1007[#1007]
_For details refer to {link-milestone}/44?closed=1[milestone 0.9.3]
and the {link-compare}/0.8.0\...0.9.3[list of commits]._
[#0-8-0]
=== 0.8.0 - 2020-07-20
* Bump external dependencies: uPickle 1.2.0, Ammonite 2.2.0, etc.
* Use default coursier repos (#931)
* Work around relative paths issue on windows (#936)
* Support Scala.js versions >1.0.0 (#934)
_For details refer to {link-milestone}/43?closed=1[milestone 0.8.0]
and the {link-compare}/0.7.4\...0.8.0[list of commits]._
[#0-7-4]
=== 0.7.4 - 2020-07-03
* new command line options `--repl` and `--no-server`, deprecated `--interactive` option
* Support for Scala.js 1.1
* Fixed missing source maps for Scala.js 1.0 and 1.1
* Improved BSP contrib module
_For details refer to {link-milestone}/42?closed=1[milestone 0.7.4]
and the {link-compare}/0.7.3\...0.7.4[list of commits]._
[#0-7-3]
=== 0.7.3
_For details refer to {link-milestone}/41?closed=1[milestone 0.7.3]
and the {link-compare}/0.7.2\...0.7.3[list of commits]._
[#0-7-2]
=== 0.7.2 - 2020-05-19
_For details refer to {link-milestone}/40?closed=1[milestone 0.7.2]
and the {link-compare}/0.7.1\...0.7.2[list of commits]._
[#0-7-1]
=== 0.7.1 - 2020-05-17
_For details refer to {link-milestone}/39?closed=1[milestone 0.7.1]
and the {link-compare}/0.7.0\...0.7.1[list of commits]._
[#0-7-0]
=== 0.7.0 - 2020-05-15
* Greatly improved parallel builds via `-j <n>`/`--jobs <n>`, with better scheduling and utilization of multiple cores
* `build.sc` files now uses Scala 2.13.2
* Avoid duplicate target resolution with `mill resolve __`
* Add ability to pass GPG arguments to publish via `--gpgArgs`
* `-w`/`--watch` now works for `Task.Source` targets
_For details refer to {link-milestone}/37?closed=1[milestone 0.7.0]
and the {link-compare}/0.6.3\...0.7.0[list of commits]._
[#0-6-3]
=== 0.6.3 - 2020-05-10
* Finished incomplete support to publish extra artifacts to IVY repositories (`publishLocal`)
* Improved Sonatype uploads
* `GenIdea`: improvements for shared source dirs and skipped modules
* `ScoverageModule`: Some refactorings to allow better customization
* More robust classpath handling under Windows
_For details refer to {link-milestone}/38?closed=1[milestone 0.6.3]
and the {link-compare}/0.6.2\...0.6.3[list of commits]._
[#0-6-2]
=== 0.6.2 - 2020-04-22
* Mill can now execute targets in parallel.
This is experimental and need to be enabled with `--jobs <n>` option.
* `PublishModule`: new `publishM2Local` to publish into local Maven repositories
* `PublishModule`: enhanced `publishLocal` to specify to ivy repository location
* Windows: Fixed windows launcher and more robust classpath handling
* `ScalaNativeModule`: improved compiling and linking support
* new contrib module `VersionFile`
* `Dependency`: improved dependency update checker and expose results for programmatic use
* ǹew contrib module `Bintray`
* ǹew contrib module `Artifactory`
* fixed testCached support in various modules
* `GenIdea`: improvements, esp. related to source jars
_For details refer to {link-milestone}/36?closed=1[milestone 0.6.2]
and the {link-compare}/0.6.1\...0.6.2[list of commits]._
[#0-6-1]
=== 0.6.1 - 2020-02-24
* Bugfix: Mill now no longer leaks open files (version bump to uPickle 1.0.0)
* New `--version` option
* Added Support for Scala.js 1.0.0+
* Added Support for Scala Native 0.4.0-M2
* `JavaModule`: Enhanced `ivyDepsTree` to optionally include compile-time and runtime-time dependencies
* `JavaModule`: `allSourceFiles` no longer include Scala sources
* `JavaModule`: assembly supports configurable separator when merging resources
* `ScoverageModule`: respect `unmanagedClasspath`, added console reporter
* `ScalaPBModule`: added more configuration options
* Bloop: Fixed inconsistent working directory when executing tests via bloop (forces `-Duser.dir` when generating bloop config)
_For details refer to {link-milestone}/35?closed=1[milestone 0.6.1]
and the {link-compare}/0.6.0\...0.6.1[list of commits]._
[#0-6-0]
=== 0.6.0 - 2020-01-20
* Support for METALS 0.8.0 in VSCode
_For details refer to {link-milestone}/34?closed=1[milestone 0.6.0]
and the {link-compare}/0.5.9\...0.6.0[list of commits]._
[#0-5-9]
=== 0.5.9 - 2020-01-14
* Bump library versions again
* Alias `T.ctx.*` functions to `T.*`: `T.dest`, `T.log`, etc.
* Bump Mill's client-connect-to-server timeout, to reduce flakiness when the server is taking a moment to start up
_For details refer to the {link-compare}/0.5.7\...0.5.9[list of commits]._
*Version 0.5.8 has some binary compatibility issues in requests-scala/geny and should not be used.*
=== 0.5.7 - 2019-12-28
* Bump library versions: Ammonite 2.0.1, uPickle 0.9.6, Scalatags 0.8.3, OS-Lib 0.6.2, Requests 0.4.7, Geny 0.4.2
_For details refer to {link-milestone}/33?closed=1[milestone 0.5.7]
and the {link-compare}/0.5.5\...0.5.7[list of commits]._
[#0-5-6]
[#0-5-5]
=== 0.5.5 / 0.5.6 - 2019-12-20
_(we skipped version 0.5.4 as we had some publishing issues)_
* Bump library versions: Ammonite 1.9.2, uPickle 0.9.0, Scalatags 0.8.2, OS-Lib 0.5.0, Requests 0.3.0, Geny 0.2.0, uTest 0.7.1
* Fixed a long standing issue that output of sub-processes are only shown when `-i` option was used.
Now, you will always seen output of sub-process.
* Mill now properly restarts it's server after it's version has changed
* `PublishModule`: added ability to publish into non-staging repositories
* `ScalaPBModule`: added extra include path option
_For details refer to {link-milestone}/32?closed=1[milestone 0.5.5]
and the {link-compare}/0.5.3\...0.5.5[list of commits]._
[#0-5-3]
=== 0.5.3 - 2019-12-07
* `GenIdea/idea`: improved support for generated sources and use/download sources in more cases
* ScalaJS: improvements and support for ScalaJS 0.6.29+ and 1.0.1.RC1
* Introduced new `CoursierModule` to use dependency management independent from a compiler
* `ScoverageModule`: better handling of report directories
* `ScalaPBModule`: more configuration options
* various other fixes and improvements
_For details refer to {link-milestone}/31?closed=1[milestone 0.5.3]
and the {link-compare}/0.5.2\...0.5.3[list of commits]._
[#0-5-2]
=== 0.5.2 - 2019-10-17
* `TestModule`: new `testCached`target, which only re-runs tests after relevant changes
* `TestModule.test`: fixed issue when stacktraces have no filename info
* `Dependency/updates`: fixed issue with reading stale dependencies
* `GenIdea/idea`: no longer shared output directories between mill and IntelliJ IDEA
* support for Dotty >= 0.18.1
* Fixed backwards compatibility of mill wrapper script
* Mill now support the Build Server Protocol 2.0 (BSP) and can act as a build server
* bloop: removed semanticDB dependency
* Documentation updates
_For details refer to {link-milestone}/30?closed=1[milestone 0.5.2]
and the {link-compare}/0.5.1\...0.5.2[list of commits]._
[#0-5-1]
=== 0.5.1 - 2019-09-05
* GenIdea: Bug fixes
* GenIdea: Support for module specific extensions (Facets) and additional config files
* Add ability to define JAR manifests
* Dotty support: Updates and support for binary compiler bridges
* Ivy: improved API to create optional dependendies
* Interpolate `$MILL_VERSION` in ivy imports
* Zinc: Fixed logger output
* Scoverage: Upgrade to Scoverage 1.4.0
* Flyway: Upgrade to Flyway 6.0.1
* Bloop: Updated semanticDB version to 4.2.2
* Documentation updates
* Improved robustness in release/deployment process
_For details refer to {link-milestone}/29?closed=1[milestone 0.5.1]
and the {link-compare}/0.5.0\...0.5.1[list of commits]._
[#0-5-0]
=== 0.5.0 - 2019-08-08
* Mill now supports a `./mill`
{link-current-doc-site}/#bootstrap-scripts-linuxos-x-only[bootstrap script], allowing a project to pin the version of Mill it requires, as well as letting contributors use `./mill ...` to begin development without needing to install Mill beforehand.
* Support for a `.mill-version` file or `MILL_VERSION` environment variable for
{link-current-doc-site}/#overriding-mill-versions[Overriding Mill Versions]
* Fix scoverage: inherit repositories from outer project {link-pr}/645[#645]
[#0-4-2]
=== 0.4.2 - 2019-06-30
* Improvements to IntelliJ project generation {link-pr}/616[#616]
* Allow configuration of Scala.js' JsEnv {link-pr}/628[#628]
[#0-4-1]
=== 0.4.1 - 2019-06-13
* Fixes for scala native test suites without test frameworks {link-issue}/627[#627]
* Fix publication of artifacts by increasing sonatype timeouts
* Bug fixes for Scoverage integration {link-issue}/623[#623]
[#0-4-0]
=== 0.4.0 - 2019-05-20
* Publish `compileIvyDeps` as provided scope ({link-issue}/535[535])
* Added contrib modules to integrate
{link-current-doc-site}/page/contrib-modules.html#bloop[Bloop],
{link-current-doc-site}/page/contrib-modules.html#flyway[Flyway],
{link-current-doc-site}/page/contrib-modules.html#play-framework[Play Framework],
{link-current-doc-site}/page/contrib-modules.html#scoverage[Scoverage]
* Allow configuration of GPG key names when publishing ({link-pr}/530[530])
* Bump Ammonite version to 1.6.7, making
https://github.com/lihaoyi/requests-scala[Requests-Scala] available to use in your `build.sc`
* Support for Scala 2.13.0-RC2
* ScalaFmt support now uses the version specified in `.scalafmt.conf`
[#0-3-6]
=== 0.3.6 - 2019-01-17
* Started to splitting out mill.api from mill.core
* Avoid unnecessary dependency downloading by providing fetches per cache policy
* Added detailed dependency download progress to the progress ticker
* Fixed internal code generator to support large projects
* Zinc worker: compiler bridge can be either pre-compiled or on-demand-compiled
* Zinc worker: configurable scala library/compiler jar discovery
* Zinc worker: configurable compiler cache supporting parallelism
* Version bumps: ammonite 1.6.0, scala 2.12.8, zinc 1.2.5
* Mill now by default fails fast, so in case a build tasks fails, it exits immediately
* Added new `-k`/`--keep-going` commandline option to disable fail fast behaviour and continue build as long as possible in case of a failure
[#0-3-5]
=== 0.3.5 - 2018-11-18
* Bump uPickle to 0.7.1
[#0-3-4]
=== 0.3.4 - 2018-11-06
* Mill is now bundled with https://github.com/lihaoyi/os-lib[OS-Lib], providing a simpler way of dealing with filesystem APIs and subprocesses
[#0-3-3]
=== 0.3.3 - 2018-11-02
* Added new `debug` method to context logger, to log additional debug info into the task specific output dir (`out/<task>/log`)
* Added `--debug` option to enable debug output to STDERR
* Fix `ScalaModule#docJar` task when Scala minor versions differ {link-issue}/475[475]
[#0-3-2]
=== 0.3.2 - 2018-10-19
* Automatically detect main class to make `ScalaModule#assembly` self-executable
[#0-3-0]
=== 0.3.0 - 2018-10-19
* Bump Ammonite to 1.3.2, Fastparse to 2.0.4
* Sped up `ScalaModule#docJar` task by about 10x, greatly speeding up publishing
* Add a flag `JavaModule#skipIdea` you can override to disable Intellij project generation {link-pr}/458[#458]
* Allow sub-domains when publishing {link-pr}/441[#441]
[#0-2-8]
=== 0.2.8 - 2018-09-21
* `mill inspect` now displays out the doc-comment documentation for a task.
* Avoid shutdown hook failures in tests {link-pr}/422[#422]
* Ignore unreadable output files rather than crashing {link-pr}/423[#423]
* Don't compile hidden files {link-pr}/428[#428]
[#0-2-7]
=== 0.2.7 - 2018-08-27
* Add `visualizePlan` command
* Basic build-info plugin in `mill-contrib-buildinfo`
* ScalaPB integration in `mill-contrib-scalapblib`
* Fixes for Twirl support, now in `mill-contrib-twirllib`
* Support for building Dotty projects
{link-pr}/397[#397]
* Allow customization of `run`/`runBackground` working directory via
`forkWorkingDir`
* Reduced executable size, improved incremental compilation in
{link-pr}/414[#414]
[#0-2-6]
=== 0.2.6 - 2018-07-30
* Improve incremental compilation to work with transitive module dependencies
* Speed up hot compilation performance by properly re-using classloaders
* Speed up compilation time of `build.sc` files by removing duplicate macro generated routing code
[#0-2-5]
=== 0.2.5 - 2018-07-22
* Add `.runBackground` and `.runMainBackground` commands, to run something in the background without waiting for it to return.
The process will keep running until it exits normally, or until the same `.runBackground` command is run a second time to spawn a new version of the process.
Can be used with `-w` for auto-reloading of long-running servers.
* {link-current-doc-site}/page/common-project-layouts.html#scala-native-modules[Scala-Native support].
Try it out!
* Add `--disable-ticker` to reduce spam in CI
* Fix propagation of `--color` flag
[#0-2-4]
=== 0.2.4 - 2018-07-07
* Fix resolution of `scala-{library,compiler,reflect}` in case of conflict
* Allow configuration of `JavaModule` and `ScalafmtModule` scala workers
* Allow hyphens in module and task names
* Fix publishing of ScalaJS modules to properly handle upstream ScalaJS dependencies
[#0-2-3]
=== 0.2.3 - 2018-06-03
* Added the {link-current-doc-site}/#visualize[mill visualize]
command, making it easy to visualize the relationships between various tasks and modules in your Mill build.
* Improve Intellij support ({link-pr}/351[351]):
better jump-to-definition for third-party libraries, no longer stomping over manual configuration, and better handling of `import $ivy` in your build file.
* Support for un-signed publishing and cases where your GPG key has no passphrase ({link-pr}/346[346])
* Basic support for Twirl, Play Framework's templating language ({link-pr}/271[271])
* Better performance for streaming large amounts of stdout from Mill's daemon process.
* Allow configuration of append/exclude rules in `ScalaModule#assembly`
({link-pr}/309[309])
[#0-2-2]
=== 0.2.2 - 2018-05-20
* Preserve caches when transitioning between `-i`/`--interactive` and the fast client/server mode ({link-issue}/329[329])
* Keep Mill daemon running if you Ctrl-C during `-w`/`--watch` mode ({link-issue}/327[327])
* Allow `mill version` to run without a build file ({link-issue}/328[328])
* Make `docJar` (and thus publishing) robust against scratch files in the source directories ({link-issue}/334[334]) and work with Scala compiler options ({link-issue}/336[336])
* Allow passing Ammonite command-line options to the `foo.repl` command ({link-pr}/333[333])
* Add `mill clean` ({link-pr}/315[315]) to easily delete the Mill build caches for specific targets
* Improve IntelliJ integration of `MavenModule`s/`SbtModule`s' test folders ({link-pr}/298[298])
* Avoid showing useless stack traces when `foo.test` result-reporting fails or
`foo.run` fails
* ScalaFmt support ({link-pr}/308[308])
* Allow `ScalaModule#generatedSources` to allow single files (previous you could only pass in directories)
[#0-2-0]
=== 0.2.0 - 2018-04-10
* Universal (combined batch/sh) script generation for launcher, assembly, and release ({link-issue}/264[#264])
* Windows client/server improvements ({link-issue}/262[#262])
* Windows repl support (note: MSYS2 subsystem/shell will be supported when jline3 v3.6.3 is released)
* Fixed Java 9 support
* Remove need for running `publishAll` using `--interactive` when on OSX and your GPG key has a passphrase
* First-class support for `JavaModule`s
* Properly pass compiler plugins to Scaladoc ({link-issue}/282[#282])
* Support for ivy version-pinning via `ivy"...".forceVersion()`
* Support for ivy excludes via `ivy"...".exclude()` ({link-pr}/254[#254])
* Make `ivyDepsTree` properly handle transitive dependencies ({link-issue}/226[#226])
* Fix handling of `runtime`-scoped ivy dependencies ({link-issue}/173[#173])
* Make environment variables available to Mill builds ({link-issue}/257[#257])
* Support ScalaCheck test runner ({link-issue}/286[#286])
* Support for using Typelevel Scala ({link-issue}/275[#275])
* If a module depends on multiple submodules with different versions of an ivy dependency, only one version is resolved ({link-issue}/273[#273])
[#0-1-7]
=== 0.1.7 - 2018-03-26
* Support for non-interactive (client/server) mode on Windows.
* More fixes for Java 9
* Bumped the Mill daemon timeout from 1 minute to 5 minutes of inactivity before it shuts down.
* Avoid leaking Node.js subprocesses when running `ScalaJSModule` tests
* Passing command-line arguments with spaces in them to tests no longer parses wrongly
* `ScalaModule#repositories`, `scalacPluginIvyDeps`, `scalacOptions`,
`javacOptions` are now automatically propagated to `Tests` modules
* `ScalaJSModule` linking errors no longer show a useless stack trace
* `ScalaModule#docJar` now properly uses the compileClasspath rather than runClasspath
* Bumped underlying Ammonite version to http://ammonite.io/#1.1.0[1.1.0], which provides the improved Windows and Java 9 support
[0-1-6]
=== 0.1.6 - 2018-03-13
* Fixes for non-interactive (client/server) mode on Java 9
* Windows batch (.bat) generation for launcher, assembly, and release
[#0-1-5]
=== 0.1.5 - 2018-03-13
* Introduced the `mill plan foo.bar` command, which shows you what the execution plan of running the `foo.bar` task looks like without actually evaluating it.
* Mill now generates an `out/mill-profile.json` file containing task-timings, to make it easier to see where your mill evaluation time is going
* Introduced `ScalaModule#ivyDepsTree` command to show dependencies tree
* Rename `describe` to `inspect` for consistency with SBT
* `mill resolve` now prints results sorted alphabetically
* Node.js configuration can be customised with `ScalaJSModule#nodeJSConfig`
* Scala.js `fullOpt` now uses Google Closure Compiler after generating the optimized Javascript output
* Scala.js now supports `NoModule` and `CommonJSModule` module kinds
* Include `compileIvyDeps` when generating IntelliJ projects
* Fixed invalid POM generation
* Support for Java 9 (and 10)
* Fixes for Windows support
* Fixed test classes discovery by skipping interfaces
* Include "optional" artifacts in dependency resolution if they exist
* `out/{module_name}` now added as a content root in generated IntelliJ project
[#0-1-4]
=== 0.1.4 - 2018-03-04
* Speed up Mill client initialization by another 50-100ms
* Speed up incremental `assembly`s in the common case where upstream dependencies do not change.
* Make `ScalaJSModule#run` work with main-method discovery
* Make `ScalaWorkerModule` user-defineable, so you can use your own custom coursier resolvers when resolving Mill's own jars
* Simplify definitions of `SCM` strings
* Make the build REPL explicitly require `-i`/`--interactive` to run
* Log a message when Mill is initializing the Zinc compiler interface
[#0-1-3]
=== 0.1.3 - 2018-02-26
* Greatly reduced the overhead of evaluating Mill tasks, with a warm already-cached `mill dev.launcher` now taking ~450ms instead of ~1000ms
* Mill now saves compiled build files in `~/.mill/ammonite`, which is configurable via the `--home` CLI arg.
* Fixed linking of multi-module Scala.js projects
[#0-1-2]
=== 0.1.2 - 2018-02-25
* Mill now keeps a long-lived work-daemon around in between commands; this should improve performance of things like `compile` which benefit from the warm JVM.
You can use `-i`/`--interactive` for interactive consoles/REPLs and for running commands without the daemon
* Implemented the `ScalaModule#launcher` target for easily creating command-line launchers you can run outside of Mill
* `ScalaModule#docJar` no longer fails if you don't have `scala-compiler` on classpath
* Support for multiple `testFrameworks` in a test module.
[#0-1-1]
=== 0.1.1 - 2018-02-19
* Fixes for `foo.console`
* Enable Ammonite REPL integration via `foo.repl`
[#0-1-0]
=== 0.1.0 - 2018-02-18
* First public release
// end::changelogOld[]