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https://github.com/stackb/bazel-stack-vscode

VSCode Extension for Bazel
https://github.com/stackb/bazel-stack-vscode

bazel build-events debugger visual-studio-code vscode vscode-extension

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VSCode Extension for Bazel

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README 

        
# bazel-stack-vscode



[Bazel](https://bazel.build) Support for Visual Studio Code.










Bazel

Stack

VSCode



## Documentation



## Marketplace



This extension provides editor support for the starlark language and the bazel

dialect of starlark.



The following operating systems are supported:



- linux

- mac

- windows



> NOTE: while the list above is sorted alphabetically, windows is not an

> afterthought; one of the main supporters of bazel-stack-vscode is a

> windows-only shop).



## Contributions



The major contribution points include:



### Language



- `starlark` language (matches `.sky`, `.star` files).

- `bazel` language (matches `BUILD`, `BUILD.bazel`, `.bzl` and related files).

- `bazelrc` language (matches `.bazelrc` and related files).



### Grammar



- `starlark` grammar (syntax highlighting for `starlark` language).

- `bazel` grammar (syntax highlighting for `bazel` language).

- `bazelrc` grammar (syntax highlighting for `bazelrc` language).



### Commands



See [Keybindings](#keybindings) for description of commands bound to keyboard

shortcuts.  Other commands included are typically meant to be activated by menus

or buttons (see [Tools](#tools)).



### Keybindings



- `shift+cmd+space` runs the `bsv.bzl.redo` command; to use this, click on a

  build/test *code action* to run it the first time; then slap the space bar

  while holding down the command key to quickly rebuild/retest it.

- `ctrl+shift+cmd+b` runs the `bsv.bzl.copyLabel` command.  To use this, place

  your cursor in the `name` of a build rule (e.g. `name = "my_f|oo_library"`)

  and stroke the keybinding; the full label `//pkg/app:my_foo_library` will be

  copied to the clipboard.

- `cmd+;` runs the `bsv.bzl.goToLabel` command.  To use this, stroke the

  keybinding (designed to be ergonomically similar to the builtin `cmd+p` menu);

  this will open an input box where you can type/paste in a bazel label; press

  `ENTER` to move to the rule/file implied by the label.

- `shift+cmd+t` runs the `workbench.view.extension.bazel-explorer` command. This

  will show the [Tools](#tools).

- `ctrl+shift+cmd+p` runs the `bsv.buildozer.wizard` command.  To use this,

  stroke the keybinding; a sequence of input boxes / picks will guide you

  through formulating a buildozer command.



### View



- The `bazel-explorer` contains a number of so-called **Tools**.  Each tool has

  a similar look-and-feel for enablement, configuration, documentation/help, and

  possible launch/execution of the tool.  See [Tools](#tools) for reference.



### Debugger



- Support for `bazel` language debugging via the debug adapter protocol.  See

  description of the [Starlark Debugger Tool](#starlark-debugger-tool) for

  details.



### Breakpoint



- Support for setting breakpoints for the `bazel` language. See

  [Debugger](#debugger).



### Snippet



Assorted `bazel` language snippets for templating out rule, provider

implementations, etc.



## Tools



The *activity view* contains a list of tree items; each top-level item

represents a "tool".  The tool may be something like `buildifier`, which

actually downloads and runs an executable; or something like a *service* that

shows information (e.g. `bazel info`).



Each "tool" component has a set of configurable elements; to configure them

either expand the **Settings** tree item and click on it, or go directly to your

user/workspace settings and hunt for the corresponding configuration item (e.g.

`bsv.bzl.lsp.enableCodelenses`).



### Buildifier Tool



Buildifier provides linting and formatting support for the `bazel` language.  It

is highly recommended to always format on save: to do this, add the following to

your `settings.json`:



```json

"[bazel]": {

    "editor.formatOnSave": true

}

```



### Buildozer Tool



Buildozer performs bulk editing of BUILD files and can be very useful for

various refactoring activities.  If you are buildozer expert, you may not need

this.  For the rest of us who use buildozer relatively infrequently, you can use

the `bsv.buildozer.wizard` to help step through the various possibilities and

construct a buildozer command.  See [Keybindings](#keybindings).



### Starlark Debugger Tool



The starlark debugger tool launches the debug adapter tool when a `bazel`

language debug session is starting.  You can customize the settings used for the

adapter or the bazel server.



See the [Debugging](https://docs.stack.build/docs/vscode/debugger)

section of the docs for more details.



### Starlark Language Server Tool



The starlark language server provides LSP support for the `bazel` and `starlark`

languages.  Supported features include:



- **code actions**: code action links for `[LABEL]`, `build`, `test`, `run`, `debug`,

  `codesearch`, and `ui`.

  - `[LABEL]`: clicking on this code action will copy the label to the clipboard.

  - `build`: clicking on this code action will run `bazel build [LABEL]` in an

    integrated terminal.

  - `test`: clicking on this code action will run `bazel test [LABEL]` in an

    integrated terminal.

  - `run`: clicking on this code action will run `bazel run [LABEL]` in an

    integrated terminal.

  - `debug`: clicking on this code action will run `bazel build [LABEL]

    --experimental_skylark_debug` and start a starlark debugging session.

  - `codesearch`: clicking on this code action will show the [Codesearch

    UI](#code-search-tool) for that label.  This allows you to "livegrep"

    withing the transitive set of source files required to build `[LABEL]`.

  - `ui`: clicking on this code action will open an external link to the

    `[LABEL]` in the [Bzl UI](#bzl-ui-tool).

- **hover**:

  - hover over a rule/provider/aspect to get documentation about the it (e.g. `ge*nrule`).

  - hover over a rule attribute to get documentation about the attribute (e.g.

    `s*rcs = ["...]`).

  - hover over a function to get documentation about the function (e.g.

    `ran*ge(1, 1, 1)`).

- **completion**:

  - completion for core starlark functions (e.g. type `rev` ->

    `reversed(sequence)`).

  - completion for bazel builtin function/rules/providers/attributes (e.g. `jav`

    -> `java_binary(...)`).

  - completion for third-party and custom starlark rules is available on a

    subscription basis.

- **jump-to-definition**:

  - `F12` on any string literal; if it looks like a relative or canonical bazel

    label, will open the corresponding BUILD or source file (works with default and

    external workspaces).



### Remote Cache Tool



The `bzl` tool contains a lightweight and fast LRU [remote

cache](https://docs.bazel.build/versions/main/remote-caching.html)

implementation.



This "locally-running" remote cache is actually 30% faster than using the

`--disk_cache` option (and manages disk usage better).  If you have multiple

bazel repositories on your workstation (or are frequently switching git

branches) it is highly recommended to run this remote cache locally, at all

times.



The cache implementation also provides nice progress notifications for uploads

with a terminal-based progress bar.



Given that you may or may not have a vscode window running at all times, the

recommended strategy is to keep a terminal running (or system service) with

`/path/to/bzl cache --progress` and put the following in your `$HOME/.bazelrc`

file:



```bazelrc

build --remote_cache=grpc://localhost:2020

```



This will give a nice speedup for many actions that you'd otherwise be waiting

to unnecessarily rebuild.



### Bazel Tool



The bazel tool provides a view of the `bazel info` for a workspace.  It is also

used to configure default build/test flags used on conjuction with the language

server (see [Starlark Language Server](#starlark-language-server-tool)).



### Stack.Build Account Tool



The account tool is used to view account settings and/or signup for a pro

subscription.  If you and your team members are using the `bazel-stack-vscode`

extension at work, please encourage your product owner / manager / corp-entity

to get your team signed up.



Benefits of `pro` subscriptions include:



1. Autocompletion, hover documentation, and jump-to-definition for

   third-party/custom rulesets.  For example, this will automagically produce

   autocompletion for a `go_binary` rule from `@io_bazel_rules_go//go:def.bzl`,

   or for a `my_custom_rule` from `//bazel/internal/corp.bzl`. [COMING SOON].

2. Invocation details and build events within VSCode.

3. Execution log diff tool.

4. Running the `bzl` tool as a service within your organization to share

   invocation details (as a developer support tool).

5. Using the `bzl cache` tool in CI.

6. User support via slack.



### Bzl UI Tool



The `bzl` tool runs a webserver by default at `http://localhost:8080`.  The UI

provides a navigable display of core bazel concepts such as:



1. Show bazel workspaces on current machine.

2. Show packages within a workspace.

3. Show rules within a workspace (by type).

4. Show attributes of a rule.

5. Show external workspaces.

6. Codesearch UI.

7. Clickable dependency graph.



The UI is intended to be used as a form of documentation for the workspace to

assist with code presentations, code review, and onboarding of new team members.



### Code Search Tool



The code search tool implements a fast search code search engine.  If you are

familiar with [livegrep](https://github.com/livegrep/livegrep), this is like

livegrep for bazel queries.  The backend is not actually livegrep, but a custom

regexp implementation similar to

[google/codesearch](github.com/google/codesearch) with an API similar to

livegrep.



Bzl codesearch is unlike any other codesearch tool as it naturally includes all

source file dependencies in the query.



Using codesearch is a two-step process:



1. Build a search file index.

2. Run queries against the index.



The codesearch UI will guide you through that process.  See the docs for

[Codesearch](https://docs.stack.build/docs/vscode/codesearch) for more details.



### Build Events Service Tool



The build event service configured the display of build events within VSCode.



### Invocations Service Tool



The invocation service tool allows you to view and/or replay invocations.



### Event Stream Tool



The event stream service tool provide a realtime view of build events for build

invocations.



## Bazelrc Language



- syntax highlighting

- hover to get [flag reference](#Hover-Flags-to-Get-Inline-Documentation) & links to bazel docs / bazel codesearch