[CI] Fix ineffective ccache

Cache on GHA is immutable. For this reason, hendrikmuhs/ccache-action creates a
new cache entry for each push, each with an appended timestamp, which fills the
cache very quickly. In an attempt to fix this, we've disabled the
append-timestamp option and appended a hash of php_version.h. Hence, we'll only
get a new cache file once this file is touched.

However, since this file rarely ever updates for master, we're relying on an
extremely outdated cache. To fix this, append the current year+week to rebuild
the cache each week instead, as suggested by Tim. Also use major.minor.release
version instead of the has of php_version.h for readability.

Fixes GH-14154
Closes GH-21258

Author: iluuu1994

.github/actions/ccache/action.yml

@@ -5,9 +5,26 @@ inputs:
 runs:
   using: composite
   steps:
+    - name: Get cache key
+      shell: bash
+      id: cache_key
+      run: |
+        major=$(cat main/php_version.h | sed -En 's/^#define PHP_MAJOR_VERSION ([0-9]+)/\1/p')
+        minor=$(cat main/php_version.h | sed -En 's/^#define PHP_MINOR_VERSION ([0-9]+)/\1/p')
+        release=$(cat main/php_version.h | sed -En 's/^#define PHP_RELEASE_VERSION ([0-9]+)/\1/p')
+        week=$(date +"%Y-%W")
+        prefix="${{ inputs.name }}-$major.$minor.$release"
+        echo "key=$prefix-$week" >> $GITHUB_OUTPUT
+        echo "prefix=$prefix-" >> $GITHUB_OUTPUT
     - name: ccache
       uses: hendrikmuhs/ccache-action@v1.2
       with:
-        key: "${{ inputs.name }}-${{ hashFiles('main/php_version.h') }}"
+        key: "${{ steps.cache_key.outputs.key }}"
         append-timestamp: false
+        restore-keys: "${{ steps.cache_key.outputs.prefix }}"
         save: ${{ github.event_name != 'pull_request' }}
+    - name: Export CC/CXX
+      shell: bash
+      run: |
+        echo "CC=ccache gcc" >> $GITHUB_ENV
+        echo "CXX=ccache g++" >> $GITHUB_ENV

.github/workflows/test-suite.yml

@@ -72,6 +72,10 @@ jobs:
           echo "::group::Show installed package versions"
           apk list
           echo "::endgroup::"
+      - name: ccache
+        uses: ./.github/actions/ccache
+        with:
+          name: "${{ github.job }}"
       - name: ./configure
         uses: ./.github/actions/configure-alpine
         with:
@@ -392,6 +396,10 @@ jobs:
         uses: ./.github/actions/apt-x64
       - name: Install gcovr
         run: sudo -H pip install gcovr
+      - name: ccache
+        uses: ./.github/actions/ccache
+        with:
+          name: "${{ github.job }}"
       - name: ./configure
         uses: ./.github/actions/configure-x64
         with:
@@ -433,6 +441,10 @@ jobs:
           ref: ${{ fromJson(inputs.branch).ref }}
       - name: apt
         uses: ./.github/actions/apt-x64
+      - name: ccache
+        uses: ./.github/actions/ccache
+        with:
+          name: "COMMUNITY_${{ matrix.type }}"
       - name: ./configure
         uses: ./.github/actions/configure-x64
         with:
@@ -635,6 +647,10 @@ jobs:
         uses: ./.github/actions/setup-mssql
       - name: apt
         uses: ./.github/actions/apt-x64
+      - name: ccache
+        uses: ./.github/actions/ccache
+        with:
+          name: "${{ github.job }}"
       - name: ./configure
         uses: ./.github/actions/configure-x64
         with:
@@ -692,6 +708,10 @@ jobs:
           ref: ${{ fromJson(inputs.branch).ref }}
       - name: apt
         uses: ./.github/actions/apt-x64
+      - name: ccache
+        uses: ./.github/actions/ccache
+        with:
+          name: "${{ github.job }}"
       - name: ./configure
         run: |
           export CC=clang
@@ -806,9 +826,6 @@ jobs:
   PECL:
     if: ${{ fromJson(inputs.branch).jobs.PECL }}
     runs-on: ubuntu-24.04
-    env:
-      CC: ccache gcc
-      CXX: ccache g++
     steps:
       - name: git checkout PHP
         uses: actions/checkout@v6

.github/workflows/test.yml

@@ -29,9 +29,6 @@ permissions:
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.url || github.run_id }}
   cancel-in-progress: true
-env:
-  CC: ccache gcc
-  CXX: ccache g++
 jobs:
   GENERATE_MATRIX:
     name: Generate Matrix