build-and-bump.yml

name: Build, minify, lower syntax, bump versions, update download counts & changelog

on:
  push:
    branches: [main]
    paths:
      - source/** # only trigger when source files were changed
      - .github/workflows/build-and-bump.yml # or on updates to this file itself
  workflow_dispatch: # allows manual triggering on GitHub

permissions:
  contents: write

#───────────────────────────────────────────────────────────────────────────────

jobs:
  bump:
    runs-on: macos-latest
    steps:
      - name: checkout
        uses: actions/checkout@v4
        # By default, no tags and only a single commit is fetched. To use git
        # history in the changelog step, we need to fetch all history.
        with:
          fetch-depth: 0 # 0 = all history
          fetch-tags: true

      - name: setup node
        uses: actions/setup-node@v4
        with:
          node-version: "22.x"

      - name: build, lower syntax, and minify
        run: |
          # Due to globbing, the source files are inserted in alphabetical order.
          # To keep things predictable, they are simply number in the order they
          # should be included in.
          cat ./source/*.css > ./theme.css

          # minification & syntax-lowering https://lightningcss.dev/transpilation.html
          npm install
          export BROWSERSLIST="chrome 108" # lowers syntax to before css-nesting
          npx lightningcss --minify --browserslist \
            --output-file="./theme.css" -- "./theme.css" || exit 1

          # append style-settings (last, so not removed by minification)
          cat <(echo && echo "/* @settings") ./source/style-settings.yaml <(echo "*/") \
            >> ./theme.css

      - name: bump version in manifest
        run: |
          version=$(grep --max-count=1 '"version"' "./manifest.json" | cut -d'"' -f4 | cut -d'.' -f2)
          sed -i '' "/version/ s/\.$version/.$((version + 1))/" "./manifest.json"

      - name: update download count in readme
        run: |
          dl=$(curl -s "https://releases.obsidian.md/stats/theme" |
            grep -oe '"Shimmering Focus","download":[[:digit:]]*' |
            cut -d: -f2)
          sed -E -i '' "s/badge.*-[0-9]+-/badge\/downloads-$dl-/" ./README.md

      - name: update changelog
        run: |
          git log :/bump.. --format="- %cs %s" | # commits since last `bump` commit
          	grep -vE "build|ci|refactor|style|bump" | # don't include internal changes
          	sed -E "s/^(- [0-9-]+) ([^ ]+): /\1 **\2**: /" >> "temp.md" # bold cc keyword
          grep -v "^$" "Changelog.md" >> "temp.md"
          mv -f "temp.md" "Changelog.md"

      - name: commit
        uses: stefanzweifel/git-auto-commit-action@v5
        with:
          commit_message: "bump: version & update changelog"
          branch: ${{ github.head_ref }}