ci(gitea): run CI in a prebuilt PHP image instead of setup-php bootstrap

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AqpXh3hQMMaC74pTjFq4it

.gitea/actions/ci-lint-php/action.yml

@@ -6,7 +6,20 @@ inputs:
 runs:
   using: composite
   steps:
-    - name: Setup PHP ${{ inputs.php }}
+    - name: Use preinstalled PHP ${{ inputs.php }} (peptide-php image)
+      id: pre
+      shell: bash
+      env:
+        V: ${{ inputs.php }}
+      run: |
+        if command -v "php$V" >/dev/null 2>&1; then
+          update-alternatives --set php "/usr/bin/php$V" >/dev/null 2>&1 || ln -sf "/usr/bin/php$V" /usr/local/bin/php
+          php -v | head -1; echo "hit=true" >> "$GITHUB_OUTPUT"
+        else
+          echo "hit=false" >> "$GITHUB_OUTPUT"
+        fi
+    - name: Setup PHP ${{ inputs.php }} (fallback when not preinstalled)
+      if: ${{ steps.pre.outputs.hit != 'true' }}
       uses: shivammathur/setup-php@v2
       with:
         php-version: ${{ inputs.php }}

.gitea/actions/ci-phpcs/action.yml

@@ -10,7 +10,18 @@ inputs:
 runs:
   using: composite
   steps:
-    - name: Setup PHP
+    - name: Use preinstalled PHP 8.1 (peptide-php image)
+      id: pre
+      shell: bash
+      run: |
+        if command -v php8.1 >/dev/null 2>&1 && command -v composer >/dev/null 2>&1; then
+          update-alternatives --set php /usr/bin/php8.1 >/dev/null 2>&1 || ln -sf /usr/bin/php8.1 /usr/local/bin/php
+          php -v | head -1; echo "hit=true" >> "$GITHUB_OUTPUT"
+        else
+          echo "hit=false" >> "$GITHUB_OUTPUT"
+        fi
+    - name: Setup PHP (fallback when not preinstalled)
+      if: ${{ steps.pre.outputs.hit != 'true' }}
       uses: shivammathur/setup-php@v2
       with:
         php-version: '8.1'
@@ -27,6 +38,9 @@ runs:
           "wp-coding-standards/wpcs:^3.0" \
           "phpcsstandards/phpcsutils:^1.0" \
           "phpcsstandards/phpcsextra:^1.0"
+        # Without setup-php's `tools: phpcs`, phpcs/phpcbf come from the global
+        # composer bin dir (WPCS pulls in squizlabs/php_codesniffer).
+        composer global config bin-dir --absolute 2>/dev/null | tail -1 >> "$GITHUB_PATH"
 
     - name: Auto-fix with phpcbf (PR only, commit back if changed)
       if: ${{ github.event_name == 'pull_request' && inputs.autofix == 'true' }}

.gitea/actions/ci-phpunit/action.yml

@@ -21,7 +21,20 @@ runs:
       shell: bash
       run: command -v svn >/dev/null || (sudo apt-get update -qq && sudo apt-get install -y --no-install-recommends subversion)
 
-    - name: Setup PHP ${{ inputs.php }}
+    - name: Use preinstalled PHP ${{ inputs.php }} (peptide-php image)
+      id: pre
+      shell: bash
+      env:
+        V: ${{ inputs.php }}
+      run: |
+        if command -v "php$V" >/dev/null 2>&1 && command -v composer >/dev/null 2>&1; then
+          update-alternatives --set php "/usr/bin/php$V" >/dev/null 2>&1 || ln -sf "/usr/bin/php$V" /usr/local/bin/php
+          php -v | head -1; echo "hit=true" >> "$GITHUB_OUTPUT"
+        else
+          echo "hit=false" >> "$GITHUB_OUTPUT"
+        fi
+    - name: Setup PHP ${{ inputs.php }} (fallback when not preinstalled)
+      if: ${{ steps.pre.outputs.hit != 'true' }}
       uses: shivammathur/setup-php@v2
       with:
         php-version: ${{ inputs.php }}

.gitea/workflows/pipeline.yml

@@ -16,6 +16,7 @@ jobs:
   lint-php:
     name: PHP Lint (${{ matrix.php }})
     runs-on: ubuntu-latest
+    container: git.protopeer.com/peptide-repo/ci-php:2026-10
     strategy:
       fail-fast: false
       matrix:
@@ -29,6 +30,7 @@ jobs:
   phpcs:
     name: PHPCS (WordPress standards)
     runs-on: ubuntu-latest
+    container: git.protopeer.com/peptide-repo/ci-php:2026-10
     steps:
       - uses: actions/checkout@v4
         with: