GH Actions: split PHAR building task off to own script

While it is still a good idea to make sure the PHAR building script works on all supported PHP versions, it is not necessary to run this task against all PHP versions on all pushes, nor to have the test runs wait until all PHAR building builds are done, as for the tests we only need the PHARs generated on PHP 8.0, which are the ones used in a release.

This commit splits the PHAR building job off to its own script, only keeping the PHAR build against PHP 8.0 in the `test` workflow.

While this does mean there is now some duplication in the scripts, I find it more relevant to make the builds faster.

Author: jrfnl

.github/workflows/build-phar.yml

@@ -0,0 +1,54 @@
+name: Build PHARs
+
+on:
+  # Run on pushes to master and on all pull requests.
+  # Prevent the build from running when there are only irrelevant changes.
+  push:
+    branches:
+      - master
+    paths-ignore:
+      - '**.md'
+  pull_request:
+  # Allow manually triggering the workflow.
+  workflow_dispatch:
+
+# Cancels all previous workflow runs for the same branch that have not yet completed.
+concurrency:
+  # The concurrency group contains the workflow name and the branch name.
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        # Deliberately missing PHP 8.0 as that PHAR is build and used in the test workflow.
+        php: ['5.4', '5.5', '5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.1', '8.2', '8.3', '8.4']
+
+    name: "Build Phars on PHP: ${{ matrix.php }}"
+
+    continue-on-error: ${{ matrix.php == '8.4' }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          coverage: none
+          ini-values: phar.readonly=Off, error_reporting=-1, display_errors=On
+
+      - name: Build the phars
+        run: php scripts/build-phar.php
+
+      # Both the below only check a file which is rarely changed and therefore unlikely to have issues.
+      # This test is about testing that the phars are functional, *not* about whether the code style complies.
+      - name: 'PHPCS: check code style using the Phar file to test the Phar is functional'
+        run: php phpcs.phar ./scripts
+
+      - name: 'PHPCBF: fix code style using the Phar file to test the Phar is functional'
+        run: php phpcbf.phar ./scripts

.github/workflows/test.yml

@@ -19,14 +19,7 @@ concurrency:
 jobs:
   build:
     runs-on: ubuntu-latest
-
-    strategy:
-      matrix:
-        php: ['5.4', '5.5', '5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4']
-
-    name: "Build Phar on PHP: ${{ matrix.php }}"
-
-    continue-on-error: ${{ matrix.php == '8.2' }}
+    name: "Build Phar on PHP 8.0"
 
     steps:
       - name: Checkout code
@@ -35,7 +28,7 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: ${{ matrix.php }}
+          php-version: '8.0'
           coverage: none
           ini-values: phar.readonly=Off, error_reporting=-1, display_errors=On
 
@@ -44,7 +37,6 @@ jobs:
 
       - name: Upload the PHPCS phar
         uses: actions/upload-artifact@v3
-        if: ${{ success() && matrix.php == '8.0' }}
         with:
           name: phpcs-phar
           path: ./phpcs.phar
@@ -53,14 +45,13 @@ jobs:
 
       - name: Upload the PHPCBF phar
         uses: actions/upload-artifact@v3
-        if: ${{ success() && matrix.php == '8.0' }}
         with:
           name: phpcbf-phar
           path: ./phpcbf.phar
           if-no-files-found: error
           retention-days: 28
 
-      # Both the below only check a few files which are rarely changed and therefore unlikely to have issues.
+      # Both the below only check a file which is rarely changed and therefore unlikely to have issues.
       # This test is about testing that the phars are functional, *not* about whether the code style complies.
       - name: 'PHPCS: check code style using the Phar file to test the Phar is functional'
         run: php phpcs.phar ./scripts