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https://github.com/crewdevio/Trex

Package Manager for deno 🦕
https://github.com/crewdevio/Trex

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Package Manager for deno 🦕

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Trex 🦕





  

  
Package management for deno (pronounced "tee rex") 





   

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![Use Trex](https://cdn.discordapp.com/attachments/727169454667989016/728363543614980116/ajio.gif)



## About



Trex is a package management tool for deno similar to npm but keeping close to

the deno philosophy. Packages are cached and only one `import_map.json` file is

generated.



```javascript

// import_map.json



{

  "imports":  {

    "http/":  "https://deno.land/std/http/"

  }

}

```



For more information about the import maps in deno see

[import maps](https://deno.land/manual/linking_to_external_code/import_maps).



## Additional topics



- [Proxy](docs/proxy.md)



- [Integration with nest.land](docs/nest_land_setup.md)



- [How can I have my package available to download with

  Trex?](docs/add_package.md)



## Installation



```console

deno install -A --unstable --import-map=https://deno.land/x/trex/import_map.json -n trex --no-check https://deno.land/x/trex/cli.ts

```



> **Note**: Works with deno >= 1.10.2



**We shorten the install command so it's not that long**



The permissions that Trex uses are:



- `--allow-net`

- `--allow-read`

- `--allow-write`

- `--allow-run`

- `--allow-env`



You can give those permissions explicitly.



## Updating Trex



Install new version with the `-f` flag:



```console

deno install -f -A --unstable --import-map=https://deno.land/x/trex/import_map.json -n trex --no-check https://deno.land/x/trex/cli.ts

```



Or use the `upgrade` command:



```console

trex upgrade

```



> **Note**: available for versions 0.2.0 or higher.   



> **Note**: to try the latest pre-release features, use the `--canary` flag.



Verify the installation of Trex:



```console

trex --version

```



The console should print the Trex version.  



For help on the commands that Trex provides, use:



```console

trex --help

```



## Usage



### Installing from deno.land



Use the `--map` flag to install packages from the [Standard Library](https://deno.land/std) (`std`) and those hosted at `deno.land/x`.



#### Example



Install the `fs`, `http` and `fmt` modules from `std`:



```console

trex install --map fs http fmt

```



> **Note**: you can also use the shorthand `i`, as in: `trex i --map fs http fmt`



### Installing from nest.land



Use the `--nest` flag and **specify an explicit version** to install packages hosted on [nest.land](https://nest.land/gallery).



```console

trex install --nest [pkg]@[version]

```



#### Examples



```console

trex install --nest [email protected]

```



```console

trex i --nest [email protected]

```



You can install `std` packages from `nest.land` by specifying the package and version:



```console

trex install --nest [email protected]

```



### Installing from a repository



```console

trex install --pkg [user]/[repo or repo@tag/branch]/[path/to/file] [packageName]

```



#### Example



```console

trex install --pkg oakserver/oak@main/mod.ts oak

```



> **Warning**: In the event that the repository uses a branch other than master as

> the main branch, this **must be specified**!



The above downloads oak directly from its repository.



### Example import map



All installation methods produce an `import_map.json` file:



```json

{

  "imports": {

    "fs/": "https://deno.land/std/fs/",

    "http/": "https://deno.land/std/http/",

    "fmt/": "https://deno.land/std/fmt/"

  }

}

```



### Downloading packages



Download all the packages listed in the `import_map.json` similar to

`npm install`:



```console

trex install

```



### Adding custom packages



Install a package from a custom URL source:



```console

trex --custom React=https://dev.jspm.io/react/index.js

```



```jsonc

// import_map.json

{

  "imports": {

    "http/": "https://deno.land/std/http/",

    "fmt/": "https://deno.land/std/fmt/",

    "oak": "https://deno.land/x/oak/mod.ts",

    "React": "https://dev.jspm.io/react/index.js"

  }

}

```



### Deleting packages



```console

trex delete React

```



Remove a specific version from the cache and the `import_map.json` file:



```console

trex delete [email protected]

```



```jsonc

// import_map.json

{

  "imports": {

    "fs/": "https://deno.land/std/fs/",

    "http/": "https://deno.land/std/http/",

    "fmt/": "https://deno.land/std/fmt/",

    "oak": "https://deno.land/x/oak/mod.ts"

  }

}

```



> **Note**: Removing from cache only works with packages from `std` and `deno.land/x`



### Installing an explicit version of a package



Specify a package's version:



```console

trex install --map [email protected]

```



```jsonc

// import_map.json

{

  "imports": {

    "fs/": "https://deno.land/[email protected]/fs/"

  }

}

```



> **Note**: can be used with third party packages.



### Checking for outdated dependencies



```console

trex check

```

> **Warning**: Currently limited to packages from [`deno.land/std`](https://deno.land/std) and [`deno.land/x`](https://deno.land/x),

> in future versions this will support third party registries and CDN sources as well.



### Run Scripts with `run.json`



You can create command aliases, similar to `deno task` or [`npm run`](https://docs.npmjs.com/cli-commands/run-script.html).  



Simply create a **`run.json`** file with the following structure:



```json

{

  "scripts": {

    "welcome": "deno run https://deno.land/[email protected]/examples/welcome.ts"

  }

}

```



#### Aliasing external commands



You can call a command from within another, or call a script like `denopack`

or `eggs update` from within a command alias:



```jsonc

// run.json

{

  "scripts": {

    "start": "trex run welcome",

    "welcome": "deno run https://deno.land/[email protected]/examples/welcome.ts",

    "dev": "denon run ./app.ts",

    "build": "aleph build",

		"update": "eggs update"

  }

}

```



Then, for example, to update your dependencies:



```console

trex run update

```

> This will execute `eggs update`



#### Installation life cycle



When the command `trex install` or `trex i` executed, you can perform actions

before and after the execution of `trex install`.



**Execution order**:



1. `preinstall`

2. `install`

3. `postinstall`



```jsonc

// run.json

{

  "scripts": {

    "start": "trex run welcome",

    "welcome": "deno run https://deno.land/[email protected]/examples/welcome.ts",

    "dev": "denon run ./app.ts",

    "build": "aleph build",

    "preinstall": "deno --version",

    "postinstall": "deno test --unstable"

  }

}

```



> **Note**: you can use the --watch flag to monitor the changes and rerun the

> script, example:



```sh

deno run --watch --unstable https://deno.land/[email protected]/examples/welcome.ts

```



#### Passing arguments to aliases



You can provide arguments when calling the command alias. These will be passed to the file to execute:



```console

trex run start --port=3000 --env

```



```typescript

console.log(Deno.args); // ["--port=3000", "--env"]

```



#### Reboot Script Alias Protocol (or _RSAP_)



With trex you can create script aliases that reload every time a file is

changed, similar to running deno with the `--watch` flag.



The Reboot Script Alias Protocol (RSAP) provides this same functionality.

Just add a `files` property to your `run.json` file, specifying an array

of files that will be watched. When changes are detected in those files,

your script aliases will be restarted immediately.



```jsonc

// run.json

{

  "scripts": {

    "start": "trex run welcome",

    "dev": "denon run ./app.ts",

    "build": "aleph build"

  },

  "files": ["./app.ts"]

}

```



You only have to add the `files` option in the `run.json` file and it will only

observe the files and folders that you specify, if you leave the array empty it

will observe all the files.



```jsonc

// run.json

{

  "scripts": {

    "dev": "go build"

  },

  "files": ["./main.go"]

}

```



For the script alias to use `rsap` you just need to add the `--watch` or `-w`

flag to the end of the command alias:



```console

trex run dev --watch [...args]

```



It can be used with any CLI tool, compiler or interpreter.



#### YAML is also acceptable (`run.yml` or `run.yaml`)



```yaml

- scripts:

    dev: go build

- files:

    - ./main.go

```



#### Limitations



A limitation of watch mode is that they **do not** restart the processes that never

end (such as http servers). In those cases we recommend other alternatives, such as

[denon](https://deno.land/x/denon).



### Virtual cli tool execution

> Trex will auto detect cli file in the order of **"cli.ts", "cli.js", "%pacakge-name%.ts", "%package-name%.js", "main.ts", "main.js", "mod.ts", "mod.js", "index.ts", "index.js"**. 

> If you want to publish a cli package, name your cli file as either of above(e.g. `cli.ts`) in your root package.



`trex exec` allows you to run many cli tools hosted at `deno.land/x`



```console

trex exec aleph init hello_world

```



trex will fetch aleph's cli and run without installing it locally using

`deno install`, you can also specify the version you want to use.



```console

trex exec [email protected] init hello_world

```



#### Permissions (perms)



You can also specify the permissions that the cli will use. 

Just pass the `--perms` flag followed by comma-separated permissions:



```console

trex exec --perms env,read,write,net denon run ./app.ts

```



- `env`: --allow-env

- `write`: --allow-write

- `read`: --allow-read

- `net`: --allow-net

- `run`: --allow-run

- `reload`: --reload

- `plugin`: --allow-plugin

- `hrtime`: --allow-hrtime

- `A`: --allow-all



> **Warning**: if you don't specify the permissions, they are **all** automatically granted to you



You can also combine this with the command alias:



```jsonc

// run.json

{

  "scripts": {

    "denon": "trex exec denon run"

  },

  "files": ["./app.ts"]

}

```



```console

trex run denon ./app.ts

```



And yes, you can do this:



```console

trex exec trex exec trex exec ....

```



Even this:



```console

trex exec land trex exec land trex exec ....

```



This functionality is heavily inspired by

[npx](https://docs.npmjs.com/cli/v7/commands/npx) and

[land](https://deno.land/x/land). If you need another alternative to `trex exec`

to use in `deno`, [land](https://deno.land/x/land) this is a great option.



### Local configuration and global configuration (experimental)



When you work with import maps trex by default will handle everything using an

import_map.json file, but what if I want to use an import-map.json or an

importMap.json instead?



That's what the global settings are for! Basically it allows you to change the

behavior of trex, with respect to the file where the dependencies will be

handled.



#### Example



```console

trex global-config --importMap=import-map.json

```



This will change the default name from import_map.json to import-map.json. to

obtain the name or format used you must execute the following command.



```console

trex global-config --getImportMap

```



But what happens if I am working with several people on the same project and we

have different configurations? For these cases there is the local configuration

or local configuration file - `trex.config.json`:



```jsonc

// trex.config.json

{

  "importMap": "importMap.json"

}

```



This will tell trex that the format for the import map will be the one dictated

by the config file. This allows that there are no problems with the different

local configurations of each developer since the configuration file only affects

the scope of the project.



> **Note**: the file `trex.config.json` must be at the same level(scope) as the

> import map for trex to detect it.



Thee hierarchy that trex respects with the configurations is the following:



```mermaid

graph TD

trex.config.json --> LocalGlobalConfig

LocalGlobalConfig --> defaultTrexConfig

```



### Purge a package or URL



If you want delete a package or url package from cache memory in deno, you can

use the `purge` command to remove from cache memory.



```console

trex purge oak

```



This finds the `oak` package in the `import_map.json`, and removes it from the

cache.



#### Purging with full URL specifiers



```console

trex purge https://deno.land/x/[email protected]/mod.ts

```



### Checking a package's dependency tree



```console

trex tree fs

```



This prints out something like:



```console

local: C:\Users\trex\AppData\Local\deno\deps\https\deno.land\434fe4a7be02d1875....

type: TypeScript

compiled: C:\Users\trex\AppData\Local\deno\gen\https\deno.land\std\fs\mod.ts.js

map: C:\Users\trex\AppData\Local\deno\gen\https\deno.land\std\fs\mod.ts.js.map

deps:

https://deno.land/std/fs/mod.ts

  ├─┬ https://deno.land/std/fs/empty_dir.ts

  │ └─┬ https://deno.land/std/path/mod.ts

  │   ├── https://deno.land/std/path/_constants.ts

  │   ├─┬ https://deno.land/std/path/win32.ts

  │   │ ├── https://deno.land/std/path/_constants.ts

  │   │ ├─┬ https://deno.land/std/path/_util.ts

  │   │ │ └── https://deno.land/std/path/_constants.ts

  │   │ └── https://deno.land/std/_util/assert.ts

  │   ├─┬ https://deno.land/std/path/posix.ts

  │   │ ├── https://deno.land/std/path/_constants.ts

  │   │ └── https://deno.land/std/path/_util.ts

  │   ├─┬ https://deno.land/std/path/common.ts

  │   │ └─┬ https://deno.land/std/path/separator.ts

  │   │   └── https://deno.land/std/path/_constants.ts

  │   ├── https://deno.land/std/path/separator.ts

  │   ├── https://deno.land/std/path/_interface.ts

  │   └─┬ https://deno.land/std/path/glob.ts

  │     ├── https://deno.land/std/path/separator.ts

  │     ├─┬ https://deno.land/std/path/_globrex.ts

  │     │ └── https://deno.land/std/path/_constants.ts

  │     ├── https://deno.land/std/path/mod.ts

  │     └── https://deno.land/std/_util/assert.ts

  ├─┬ https://deno.land/std/fs/ensure_dir.ts

	

# ... full response was truncated for brevity

```



### Integrity checking & lock files



Let's say your module depends on a remote module. When you compile your module

for the first time, it is retrieved, compiled and cached. It will remain this

way until you run your module on a new machine (e.g. in production) or reload

the cache.



But what happens if the content in the remote url is changed? This could lead to

your production module running with different dependency code than your local

module. Deno's solution to avoid this is to use integrity checking and lock

files.



Create a lockfile:



```console

deno cache --lock=lock.json --lock-write file.ts

```



The above generates a `lock.json` file.



If you use `import_map.json` in input file, you can specify it:



```console

deno cache --lock=lock.json --lock-write --import-map=import_map.json --unstable file.ts

```



See

[deno document](https://deno.land/manual/linking_to_external_code/integrity_checking)

for more info.



## Complete example



### Simple std server



#### Install `http` and `fmt`:



```console

trex install --map http fmt

```



#### Create a simple server



```typescript

// server.ts

import { serve } from "http/server.ts";

import { green } from "fmt/colors.ts";



const server = serve({ port: 8000 });

console.log(green("http://localhost:8000/"));



for await (const req of server) {

  req.respond({ body: "Hello World\n" });

}

```



#### Start the server



```console

deno run --allow-net --import-map=import_map.json --unstable server.ts

```



> **Warning**: it is important to use **--import-map=import_map.json --unstable**



### Adding third-party packages: Example using [oak](https://deno.land/x/oak)



#### Install the master version of `oak`



```console

trex i --map oak

```



This adds `oak` to the `import_map.json` file:



```json

{

  "imports": {

    "http/": "https://deno.land/std/http/",

    "fmt/": "https://deno.land/std/fmt/",

    "oak": "https://deno.land/x/oak/mod.ts"

  }

}

```



#### Then create an oak application. 



Note the `import` statement, thanks to the `import_map.json` addition:



```typescript

// app.ts

import { Application } from "oak";



const app = new Application();



app.use((ctx) => {

  ctx.response.body = "Hello World!";

});



await app.listen({ port: 8000 });

```



#### Run the server



```console

deno run --allow-net --import-map=import_map.json --unstable app.ts

```



> **Warning**: it is important to use **--import-map=import_map.json --unstable**



## Contributing



Contributions are welcome, see [CONTRIBUTING GUIDELINES](CONTRIBUTING.md).



## Licensing



Trex is licensed under the [MIT](https://opensource.org/licenses/MIT) license.



 


    

    
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