refactor: move to github actions

.github/workflows/release.yml

@@ -0,0 +1,42 @@
+name: Release
+
+on:
+  push:
+    branches:
+      - trunk
+      - alpha
+      - 'hotfix/**'
+      - 'epic/**'
+
+jobs:
+  release:
+    name: Build and Release
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      issues: write
+      pull-requests: write
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          persist-credentials: false
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: '.nvmrc'
+          cache: 'npm'
+
+      - name: Verify Node version
+        run: node --version
+
+      - name: Install dependencies
+        run: npm install --legacy-peer-deps
+
+      - name: Release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
+        run: npm run semantic-release

.github/workflows/reusable-build-distributable.yml

@@ -0,0 +1,44 @@
+name: Build Distributable
+
+on:
+  workflow_call:
+    inputs:
+      archive-name:
+        description: 'Name of the ZIP archive distributable'
+        required: true
+        type: string
+
+jobs:
+  build-distributable:
+    name: Build distributable files
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: '.nvmrc'
+          cache: 'npm'
+
+      - name: Verify Node version
+        run: node --version
+
+      - name: Install dependencies
+        run: npm ci --legacy-peer-deps
+
+      - name: Install rsync
+        run: sudo apt-get update && sudo apt-get install -y rsync
+
+      - name: Install PHP packages
+        run: composer install --no-dev --no-scripts
+
+      - name: Build plugin files
+        run: npm run build && npm run release:archive
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ inputs.archive-name }}
+          path: release/${{ inputs.archive-name }}.zip

.github/workflows/reusable-build.yml

@@ -0,0 +1,24 @@
+name: Build
+
+on:
+  workflow_call:
+
+jobs:
+  build:
+    name: Install node dependencies
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: '.nvmrc'
+          cache: 'npm'
+
+      - name: Verify Node version
+        run: node --version
+
+      - name: Install dependencies
+        run: npm ci --legacy-peer-deps

.github/workflows/reusable-check-typescript.yml

@@ -0,0 +1,27 @@
+name: Check TypeScript
+
+on:
+  workflow_call:
+
+jobs:
+  check-typescript:
+    name: Validate TypeScript
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: '.nvmrc'
+          cache: 'npm'
+
+      - name: Verify Node version
+        run: node --version
+
+      - name: Install dependencies
+        run: npm ci --legacy-peer-deps
+
+      - name: Validate TypeScript
+        run: npm run typescript:check

.github/workflows/reusable-generate-docs.yml

@@ -0,0 +1,39 @@
+name: Generate Docs
+
+on:
+  workflow_call:
+    secrets:
+      GITHUB_TOKEN:
+        required: true
+
+jobs:
+  generate-docs:
+    name: Generate documentation
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: sudo apt-get update && sudo apt-get install -y graphviz plantuml
+
+      - name: Download PHPDocumentor
+        run: |
+          curl -L -o ./phpdocumentor https://phpdoc.org/phpDocumentor.phar
+          chmod +x ./phpdocumentor
+
+      - name: Generate documentation
+        run: ./phpdocumentor run -d . -t ./docs
+
+      - name: Switch to docs branch, commit, and push
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GIT_COMMITTER_NAME: ${{ vars.GIT_COMMITTER_NAME || 'github-actions[bot]' }}
+          GIT_COMMITTER_EMAIL: ${{ vars.GIT_COMMITTER_EMAIL || 'github-actions[bot]@users.noreply.github.com' }}
+        run: |
+          git config user.name "$GIT_COMMITTER_NAME"
+          git config user.email "$GIT_COMMITTER_EMAIL"
+          git checkout -b docs
+          git add -f docs
+          git commit -m "Update the docs"
+          git push "https://x-access-token:${GITHUB_TOKEN}@github.com/${{ github.repository }}.git" docs --force

.github/workflows/reusable-i18n.yml

@@ -0,0 +1,130 @@
+name: i18n
+
+on:
+  workflow_call:
+
+jobs:
+  i18n:
+    name: Create translation files
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: '.nvmrc'
+          cache: 'npm'
+
+      - name: Check if commit author is bot
+        id: check-bot
+        env:
+          GIT_COMMITTER_EMAIL: ${{ vars.GIT_COMMITTER_EMAIL || 'github-actions[bot]@users.noreply.github.com' }}
+        run: |
+          COMMIT_AUTHOR=$(git log -1 --pretty=format:'%ae')
+          if [ "$COMMIT_AUTHOR" = "$GIT_COMMITTER_EMAIL" ]; then
+            echo "Commit was made by bot ($(git rev-parse --short HEAD)), skipping translation update"
+            echo "skip=true" >> $GITHUB_OUTPUT
+          else
+            echo "skip=false" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Install dependencies
+        if: steps.check-bot.outputs.skip != 'true'
+        run: npm ci --legacy-peer-deps
+
+      - name: Configure PHP for deep nesting
+        if: steps.check-bot.outputs.skip != 'true'
+        run: |
+          # Increase xdebug max_nesting_level to handle deeply nested JS files
+          echo "xdebug.max_nesting_level=512" | sudo tee -a $(php -i | grep "Scan this dir for additional .ini files" | cut -d' ' -f9)/99-custom.ini
+
+      - name: Install WP CLI
+        if: steps.check-bot.outputs.skip != 'true'
+        run: |
+          curl -O https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar
+          chmod +x wp-cli.phar
+          sudo mv wp-cli.phar /usr/local/bin/wp
+
+      - name: Build plugin files
+        if: steps.check-bot.outputs.skip != 'true'
+        run: npm run build || true
+
+      - name: Create POT translation files
+        if: steps.check-bot.outputs.skip != 'true'
+        env:
+          REPO_NAME: ${{ github.event.repository.name }}
+        run: |
+          # Theme is excluded, more in https://github.com/Automattic/newspack-theme/pull/2458
+          if [ "$REPO_NAME" = "newspack-theme" ]; then
+            cd ./newspack-theme
+            wp i18n make-pot . languages/${REPO_NAME}.pot --exclude='src' --domain=${REPO_NAME}
+            cd -
+          else
+            wp i18n make-pot . languages/${REPO_NAME}.pot --exclude='src' --domain=${REPO_NAME}
+          fi
+
+      - name: Create JSON translation files
+        if: steps.check-bot.outputs.skip != 'true'
+        env:
+          REPO_NAME: ${{ github.event.repository.name }}
+        run: |
+          if [ "$REPO_NAME" = "newspack-theme" ]; then
+            cd ./newspack-theme
+          fi
+
+          sudo apt-get update && sudo apt-get install -y gettext
+
+          cd languages
+
+          # Create PO files from POT if they don't exist
+          if [ ! -f "${REPO_NAME}-en_US.po" ]; then
+            echo "Creating ${REPO_NAME}-en_US.po from POT file"
+            wp i18n update-po ${REPO_NAME}.pot .
+          else
+            echo "${REPO_NAME}-en_US.po file already exists, skipping creation"
+          fi
+
+          for po in *.po; do
+            if [ -f "$po" ]; then
+              echo "Processing file $po …"
+              # Update translations according to the new POT file
+              msgmerge $po $REPO_NAME.pot -o $po.out
+              mv $po.out $po
+              msgfmt $po -o $(basename $po .po).mo
+              # no-purge since we need the JS translations for the next run
+              wp i18n make-json --no-purge $po .
+            fi
+          done
+
+      - name: Commit translation files
+        if: steps.check-bot.outputs.skip != 'true'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          REPO_NAME: ${{ github.event.repository.name }}
+          GIT_COMMITTER_NAME: ${{ vars.GIT_COMMITTER_NAME || 'github-actions[bot]' }}
+          GIT_COMMITTER_EMAIL: ${{ vars.GIT_COMMITTER_EMAIL || 'github-actions[bot]@users.noreply.github.com' }}
+        run: |
+          if [ "$REPO_NAME" = "newspack-theme" ]; then
+            cd ./newspack-theme
+          fi
+          if [ -d "languages" ]; then
+            LINES_CHANGED=$(git diff --numstat languages/ | awk '{sum += $1 + $2} END {print sum}')
+            # If no existing files were changed, check for new files
+            if [ -z "$LINES_CHANGED" ] || [ "$LINES_CHANGED" -eq 0 ]; then
+              LINES_CHANGED=$(git ls-files --others --exclude-standard languages/ | xargs wc -l 2>/dev/null | tail -1 | awk '{print $1}')
+            fi
+          else
+            LINES_CHANGED=0
+          fi
+          LINES_CHANGED=${LINES_CHANGED:-0}
+          echo "Lines changed in languages/: $LINES_CHANGED"
+          if [ "$LINES_CHANGED" -gt 3 ]; then
+            git config user.email "$GIT_COMMITTER_EMAIL"
+            git config user.name "$GIT_COMMITTER_NAME"
+            git remote set-url origin https://x-access-token:$GITHUB_TOKEN@github.com/${{ github.repository }}.git
+            git add languages/
+            git commit -m "chore: update translation files [skip ci]"
+            git push origin ${{ github.ref_name }}
+          fi

.github/workflows/reusable-lint-js-scss.yml

@@ -0,0 +1,28 @@
+name: Lint JS & SCSS
+
+on:
+  workflow_call:
+
+jobs:
+  lint-js-scss:
+    name: Lint JS & SCSS files
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: '.nvmrc'
+          cache: 'npm'
+
+      - name: Verify Node version
+        run: node --version
+
+      - name: Install dependencies
+        run: npm ci --legacy-peer-deps
+
+      - name: Run Linter
+        # Temporarily skip linting SCSS due to stylelint config updates. Remove :js when ready to re-enable linting of SCSS.
+        run: npm run lint:js