minor #95 [CI] Cache Composer dependencies (Kocal)

This PR was merged into the main branch.

Discussion
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[CI] Cache Composer dependencies

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Docs?         | no <!-- required for new features -->
| Issues        | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exist, explain below instead -->
| License       | MIT

<!--
Replace this notice by a description of your feature/bugfix.
This will help reviewers and should be a good start for the documentation.

Additionally (see https://symfony.com/releases):
 - Always add tests and ensure they pass.
 - For new features, provide some code snippets to help understand usage.
 - Features and deprecations must be submitted against branch main.
 - Update/add documentation as required (we can help!)
 - Changelog entry should follow https://symfony.com/doc/current/contributing/code/conventions.html#writing-a-changelog-entry
 - Never break backward compatibility (see https://symfony.com/bc).
-->

Added Cache for Composer dependencies, either automatically with `ramsey/composer-install@v3` (for root dependencies), either manually with `actions/cache`, like we did on UX.

Commits
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91b2db8 [CI] Cache Composer dependencies

Author: chr-hertel

.github/workflows/code-quality.yaml

@@ -64,8 +64,21 @@ jobs:
                     php-version: '8.2'
                     tools: flex
 
+            -   name: Get composer cache directory
+                id: composer-cache
+                run: |
+                    echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
+
+            - name: Cache packages dependencies
+              uses: actions/cache@v4
+              with:
+                  path: ${{ steps.composer-cache.outputs.dir }}
+                  key: ${{ runner.os }}-composer-packages-${{ matrix.php-version }}-${{ matrix.dependency-version }}-${{ matrix.symfony-version }}-${{ matrix.minimum-stability }}-${{ hashFiles('src/**/composer.json') }}
+                  restore-keys: |
+                      ${{ runner.os }}-composer-packages-${{ matrix.php-version }}-${{ matrix.dependency-version }}-${{ matrix.symfony-version }}-${{ matrix.minimum-stability }}
+
             - name: Install root dependencies
-              run: composer install
+              uses: ramsey/composer-install@v3
 
             - name: Build root packages
               run: php .github/build-packages.php

.github/workflows/unit-tests.yaml

@@ -62,8 +62,21 @@ jobs:
                 tools: flex
                 extensions: "${{ env.REQUIRED_PHP_EXTENSIONS }}"
 
+            -   name: Get composer cache directory
+                id: composer-cache
+                run: |
+                    echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
+
+            - name: Cache packages dependencies
+              uses: actions/cache@v4
+              with:
+                  path: ${{ steps.composer-cache.outputs.dir }}
+                  key: ${{ runner.os }}-composer-packages-${{ matrix.php-version }}-${{ matrix.dependency-version }}-${{ matrix.symfony-version }}-${{ matrix.minimum-stability }}-${{ hashFiles('src/**/composer.json') }}
+                  restore-keys: |
+                      ${{ runner.os }}-composer-packages-${{ matrix.php-version }}-${{ matrix.dependency-version }}-${{ matrix.symfony-version }}-${{ matrix.minimum-stability }}
+
             - name: Install root dependencies
-              run: composer install
+              uses: ramsey/composer-install@v3
 
             - name: Build root packages
               run: php .github/build-packages.php