dem

• A simple module version manager for Deno.
• dem creates dem.json and links script files with version.
  • linked scripts are stored in vendor directory.
• dem provides an easy way to update dependencies.

Install

deno install --allow-read --allow-write -f -n dem https://deno.land/x/dem@0.7.0/cmd.ts

Example

Using https://deno.land/std/http/server.ts at v0.51.0

• dem.json (generated)

{
  "modules": [
    {
      "protocol": "https",
      "path": "deno.land/std",
      "version": "v0.51.0",
      "files": [
        "/http/server.ts"
      ]
    }
  ]
}

• vendor/https/deno.land/std/http/server.ts (generated)

export * from "https://deno.land/std@v0.51.0/http/server.ts";

• example.ts (script to run)

// Now you can import module without the version! (because version `v0.51.0` is stored in linked script)
import { serve } from "./vendor/https/deno.land/std/http/server.ts";

Usage

Getting Started

1. dem init to create dem.json

$ dem init
successfully initialized the project.

2. dem add to add module.

$ dem add https://deno.land/std@v0.51.0
successfully added new module: https://deno.land/std, version: v0.51.0

3. Edit your script and import module from vendor.

example.ts

import * as path from './vendor/https/deno.land/std/fs/path.ts';

console.log(path.join(Deno.cwd(), 'example'));

4. dem ensure to resolve modules.

$ dem ensure
successfully created link: https://deno.land/std@v0.51.0/fs/path.ts

5. Run your script.

$ deno example.ts

Standard Usage

Updating module

• dem update updates versions in dem.json and linked scripts.

$ dem update https://deno.land/std@v0.52.0
successfully updated module: https://deno.land/std, version: v0.52.0

Advanced Usage

Alias

• With alias, shortened script paths are available.

example.ts

// Original
import * as dejs from "./vendor/https/deno.land/x/dejs/mod.ts"
// With alias
import * as dejs from "./vendor/dejs.ts"

How to use alias

1. import file with alias path

import * as dejs from "./vendor/dejs.ts"

1. execute alias and ensure.
   • if link is already created, you don’t have to execute ensure.

# create alias for module.
$ dem alias https://deno.land/x/dejs/mod.ts dejs.ts

# create link for `./vendor/https/deno.land/x/dejs/mod.ts`.
$ dem ensure

Commands

dem init                                          // initialize dem.json
dem add https://deno.land/x/dejs@0.1.0            // add module `dejs` and set its version to `0.1.0`
dem link https://deno.land/x/dejs/mod.ts          // create link of `dejs@0.1.0/mod.ts` and put it into vendor.
dem update https://deno.land/x/dejs@0.2.0         // update module to `0.2.0`
dem unlink https://deno.land/x/dejs/mod.ts        // remove link of `dejs@0.2.0/mod.ts`.
dem remove https://deno.land/x/dejs               // remove module `dejs`
dem ensure                                        // resolve file paths of added modules used in project and link them.
dem prune                                         // remove unused modules and linked scripts.
dem alias https://deno.land/x/dejs/mod.ts dejs.ts // create alias for module and put it into vendor.
dem unalias dejs.ts                               // remove alias for module.

Unsupported features

• default export
• manage .d.ts file

Author

syumai

License

MIT