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Nov 2, 2021

Depp - A fast unused and duplicate package checker Go Reference

Installation

## NPM
npm install -g depp-installer 
# (will try to get npm install -g depp later)

## Go
go install github.com/cryogenicplanet/depp@latest

Usage

Just run depp in your project folder and it will do the rest. Keep in mind it will likely fail without setting some externals

Note if you want it to work with JS please use -j or --js by default it will do only .ts|.tsx files

All options

➜ depp --help  
NAME:
   depp - Find un used packages fast

USAGE:
   depp [global options] command [command options] [arguments...]

COMMANDS:
   clean      Cleans all output files
   show       Shows previous report
   deploy, d  Automatically deploy your report to netlify
   config     A command to handle config
   init       Initialize project
   help, h    Shows a list of commands or help for one command

GLOBAL OPTIONS:
   --dev, -d                              Enable dev dependencies (default: false)
   --js, -j                               Enable js source files (default: false)
   --path value, -p value                 Overwrite root directory
   --log, -l                              Will write logs to .depcheck.log (default: false)
   --source value, -s value               Overwrite default sources
   --report, -r                           Generate report file (default: false)
   --show-versions, -v                    Show conflicting versions (default: false)
   --write-output-files, -w               This will write the esbuild output files. (default: false)
   --externals value, -e value            Pass custom externals using this flag
   --ignore-namespaces value, --in value  Pass namespace (@monorepo) to be ignored
   --no-open, --no                        Flag to prevent auto opening report in browser (default: false)
   --save-config, --sc                    Flag to automatically save config from other flags (default: false)
   --ci                                   Run in github actions ci mode (default: false)
   --deploy value                         Will automatically deploy report to netlify
   --help, -h                             show help (default: false)

Example Advanced usage

This is an example of advanced usage of the script with externals and ignore-namespace

depp -v -j -e mobx -e magic-sdk -e domain -e @daybrush/utils -e yjs -e constants -e ws  -e perf_hooks -in @editor -in @server   --report

Configuration

You can save your depp config and not have to run it with flags every time, the config is saved in .depp/config.json but can be created from the cli

# Initialize config
depp init 

➜ depp --help                                                
NAME:
   depp - Find un used packages fast

USAGE:
   depp [global options] command [command options] [arguments...]

COMMANDS:
   clean      Cleans all output files
   show       Shows previous report
   deploy, d  Automatically deploy your report to netlify
   config     A command to handle config
   init       Initialize project
   help, h    Shows a list of commands or help for one command

GLOBAL OPTIONS:
   --dev, -d                              Enable dev dependencies (default: false)
   --js, -j                               Enable js source files (default: false)
   --path value, -p value                 Overwrite root directory
   --log, -l                              Will write logs to .depcheck.log (default: false)
   --source value, -s value               Overwrite default sources
   --report, -r                           Generate report file (default: false)
   --show-versions, -v                    Show conflicting versions (default: false)
   --write-output-files, -w               This will write the esbuild output files. (default: false)
   --externals value, -e value            Pass custom externals using this flag
   --ignore-namespaces value, --in value  Pass namespace (@monorepo) to be ignored
   --no-open, --no                        Flag to prevent auto opening report in browser (default: false)
   --save-config, --sc                    Flag to automatically save config from other flags (default: false)
   --ci                                   Run in github actions ci mode (default: false)
   --deploy value                         Will automatically deploy report to netlify
   --browser                              Will use esbuild browser platform (by default it uses node platform) (default: false)
   --ignore-path value, --ip value        A glob pattern of files to be ignored

CI

Currently only supports Github actions out of the box.

In mode, depp will automatically comment on the PR with its report. It will look like this

It can also deploy the report to netlify but requires a NETLIFY_TOKEN which you can get here

name: Dependency CI

on:
  pull_request:


jobs:
  release-go:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
        with:
          fetch-depth: 0
      - name: Set up Go
        uses: actions/setup-go@v2
        with:
          go-version: 1.17
      - name: Install Depp 
        run: go install github.com/cryogenicplanet/depp@latest
      - name: Run Depp
        run: depp --ci
        env:
            # NETLIFY_TOKEN: ${{secrets.NETLIFY_TOKEN}}
            # Optional if you want report urls or not
            # You can get a netlify pat here https://app.netlify.com/user/applications#personal-access-tokens

Example Outputs

  1. Markdown
  2. Html

Why use this

  1. It is using esbuild and go so it is quite a bit faster than most other tools
  2. Most tools that I could find at least, didn't not support monorepos. This does and is built for monorepos

Caveats

This is not been extensively tested and might have some short comings, it may not identify every unused package but will definitely do a decent first pass

Acknowledgement

This is built upon the excellent work down by @evanw on esbuild and uses esbuild under the hood