Configure Composer caching.

Author: desrosj

…rkflows/compare-build-script-results.yml .github/workflows/compare-built-files.yml.github/workflows/compare-build-script-results.yml renamed to .github/workflows/compare-built-files.yml .github/workflows/compare-build-script-results.yml renamed to .github/workflows/compare-built-files.yml

@@ -1,8 +1,6 @@
 name: Compares Built Files
 
 on:
-  # JSHint was introduced in WordPress 3.8.
-  # PHPCS checking was introduced in WordPress 5.1.
   push:
     branches:
       - trunk
@@ -42,8 +40,8 @@ permissions: {}
 jobs:
   # Compares the results of the build script with WordPress/WordPress.
   compare-build-script-results:
-    name: Compare built PR to WordPress/WordPress
-    uses: ./.github/workflows/reusable-compare-build-script-results-v1.yml
+    name: Compare PR's built files to WordPress/WordPress
+    uses: reusable-compare-built-files-v1.yml
     permissions:
       contents: read
     if: ${{ github.repository == 'WordPress/wordpress-develop' || github.event_name == 'pull_request' }}

…able-compare-build-script-results-v1.yml …lows/reusable-compare-built-files-v1.yml.github/workflows/reusable-compare-build-script-results-v1.yml renamed to .github/workflows/reusable-compare-built-files-v1.yml .github/workflows/reusable-compare-build-script-results-v1.yml renamed to .github/workflows/reusable-compare-built-files-v1.yml

@@ -1,7 +1,7 @@
 ##
 # A reusable workflow that compares the results of the build script with the most recent build server commit.
 ##
-name: Reusable Compare Build Script Results
+name: Reusable Compare Built Files
 
 on:
   workflow_call:
@@ -48,6 +48,19 @@ jobs:
           node-version-file: '.nvmrc'
           cache: npm
 
+      # This date is used to ensure that the PHPCS cache is cleared at least once every week.
+      # http://man7.org/linux/man-pages/man1/date.1.html
+      - name: "Get last Monday's date"
+        id: get-date
+        run: echo "date=$(/bin/date -u --date='last Mon' "+%F")" >> "$GITHUB_OUTPUT"
+
+      # Since Composer dependencies are installed using `composer update` and no lock file is in version control,
+      # passing a custom cache suffix ensures that the cache is flushed at least once per week.
+      - name: Install Composer dependencies
+        uses: ramsey/composer-install@65e4f84970763564f46a70b8a54b90d033b3bdda # v4.0.0
+        with:
+          custom-cache-suffix: ${{ steps.get-date.outputs.date }}
+
       - name: Log debug information
         run: |
           npm --version