ci: Simplify version matrix

Let’s just list version branches, we can always extract the required data from that.
This will be especially necessary once we introduce master branch, where major component of version needs to be computed.

.github/workflows/build.yaml

@@ -9,27 +9,19 @@ on:
 
 jobs:
   build:
-    name: 'PHP ${{ matrix.php.major }}.${{ matrix.php.minor }}'
+    name: 'PHP ${{ matrix.php.branch }}'
     runs-on: ubuntu-20.04
     strategy:
       matrix:
         php:
-          - major: 8
-            minor: 1
-          - major: 8
-            minor: 0
-          - major: 7
-            minor: 4
-          - major: 7
-            minor: 3
-          - major: 7
-            minor: 2
-          - major: 7
-            minor: 1
-          - major: 7
-            minor: 0
-          - major: 5
-            minor: 6
+          - branch: '8.1'
+          - branch: '8.0'
+          - branch: '7.4'
+          - branch: '7.3'
+          - branch: '7.2'
+          - branch: '7.1'
+          - branch: '7.0'
+          - branch: '5.6'
       # We want to fix failures individually.
       fail-fast: false
     steps:
@@ -44,34 +36,44 @@ jobs:
           name: fossar
           authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
 
+      - name: Set job parameters
+        id: params
+        run: |
+          branch=${{ matrix.php.branch }}
+          major=${branch%%.*}
+          minor=${branch#*.}
+          attr=php$major$minor
+          echo "::set-output name=major::$major"
+          echo "::set-output name=attr::$attr"
+
       - name: Build PHP
-        run: nix-build -A outputs.checks.x86_64-linux.php${{ matrix.php.major }}${{ matrix.php.minor }}-php
+        run: nix-build -A outputs.checks.x86_64-linux.${{ steps.params.outputs.attr }}-php
 
       - name: Build Imagick extension
-        run: nix-build -A outputs.checks.x86_64-linux.php${{ matrix.php.major }}${{ matrix.php.minor }}-imagick
+        run: nix-build -A outputs.checks.x86_64-linux.${{ steps.params.outputs.attr }}-imagick
 
       - name: Build Redis extension
-        run: nix-build -A outputs.checks.x86_64-linux.php${{ matrix.php.major }}${{ matrix.php.minor }}-redis
+        run: nix-build -A outputs.checks.x86_64-linux.${{ steps.params.outputs.attr }}-redis
 
       - name: Build Redis 3 extension
-        if: ${{ matrix.php.major < 8 }}
-        run: nix-build -A outputs.checks.x86_64-linux.php${{ matrix.php.major }}${{ matrix.php.minor }}-redis3
+        if: ${{ steps.params.outputs.major < 8 }}
+        run: nix-build -A outputs.checks.x86_64-linux.${{ steps.params.outputs.attr }}-redis3
 
       - name: Build MySQL extension
-        if: ${{ matrix.php.major < 7 }}
-        run: nix-build -A outputs.checks.x86_64-linux.php${{ matrix.php.major }}${{ matrix.php.minor }}-mysql
+        if: ${{ steps.params.outputs.major < 7 }}
+        run: nix-build -A outputs.checks.x86_64-linux.${{ steps.params.outputs.attr }}-mysql
 
       - name: Build Xdebug extension
-        run: nix-build -A outputs.checks.x86_64-linux.php${{ matrix.php.major }}${{ matrix.php.minor }}-xdebug
+        run: nix-build -A outputs.checks.x86_64-linux.${{ steps.params.outputs.attr }}-xdebug
 
       - name: Build Tidy extension
-        run: nix-build -A outputs.checks.x86_64-linux.php${{ matrix.php.major }}${{ matrix.php.minor }}-tidy
+        run: nix-build -A outputs.checks.x86_64-linux.${{ steps.params.outputs.attr }}-tidy
 
       - name: Check that composer PHAR works
-        run: nix-build -A outputs.checks.x86_64-linux.php${{ matrix.php.major }}${{ matrix.php.minor }}-composer-phar
+        run: nix-build -A outputs.checks.x86_64-linux.${{ steps.params.outputs.attr }}-composer-phar
 
       - name: Validate php.extensions.mysqli default unix socket path
-        run: nix-build -A outputs.checks.x86_64-linux.php${{ matrix.php.major }}${{ matrix.php.minor }}-mysqli-socket-path
+        run: nix-build -A outputs.checks.x86_64-linux.${{ steps.params.outputs.attr }}-mysqli-socket-path
 
       - name: Validate php.extensions.pdo_mysql default unix socket path
-        run: nix-build -A outputs.checks.x86_64-linux.php${{ matrix.php.major }}${{ matrix.php.minor }}-pdo_mysql-socket-path
+        run: nix-build -A outputs.checks.x86_64-linux.${{ steps.params.outputs.attr }}-pdo_mysql-socket-path