This GitHub Actions optimizes images in your repository. You will receive a pull request with optimized images. This Github Actions is inspired by ImgBot.

A pull request example:

name: imgcmp
on:
  push:
    branches:
      - main
      - master
jobs:
  imgcmp:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write
    steps:
      - uses: 9sako6/[email protected]
        with:
          token: ${{ secrets.GITHUB_TOKEN }}

If you want to run this action only once a week, please add the following lines.

name: imgcmp
on:
  schedule:
    - cron: "0 0 * * 1" # Weekly build
jobs:
  imgcmp:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write
    steps:
      - uses: 9sako6/[email protected]
        with:
          token: ${{ secrets.GITHUB_TOKEN }}

Then, you will receive a pull request with optimized images every Monday at 0:00.

imgcmp offers an ignore option. paths-ignore-regexp is regular expression for images' paths you don't want to compress.

Example:

name: imgcmp
on:
  push:
    branches:
      - main
      - master
jobs:
  imgcmp:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write
    steps:
      - uses: 9sako6/[email protected]
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          paths-ignore-regexp: "(ignore/.*)|(public/.*)"

Step outputs can be accessed as in the following example.

      - uses: 9sako6/[email protected]
        id: imgcmp
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
      - name: Check outputs
        run: |
          echo ${{ steps.imgcmp.outputs.pull-request-number }}

• JPEG/JPG
• PNG
• GIF
• SVG
• WEBP

This bot uses these optimizers.

• -m85: this will store the image with 85% quality

• -o2: this sets the optimization level 2 (there is 0-7 optimization levels)

• -O3: this sets the optimization level to Gifsicle's maximum

SVGO's default configuration will be used.

• -q 75: cwebp's default optimization level

It took 34 sec to create the following PR.

Bug fixes.

• truncate long messages (#272)

• Skip to create PR if there are small changes (#184)
• Add pull-request-number outputs (#169)

Bug fixes.

• Fix the problem that actions fail when a trigger event is pull_request (#99)
• Fix the problem that actions fail when paths-ignore-regexp is empty (#51)

There are breaking changes from version 1.0.1.

• Add token input (#26)
  • GITHUB_TOKEN option in env was deleted.
• Add paths-ignore-regexp input (#26)
  • IGNORED_FILES option in env was deleted.
• Refactoring the pull request template (#26)

9sako6