Auto-determine derivations to build.

Test on Linux and MacOS.

Author: drupol

.github/workflows/build.yaml

@@ -8,88 +8,101 @@ on:
   push:
 
 jobs:
+  determine-matrix:
+    name: Figure out the packages we need to build
+    runs-on: ubuntu-latest
+
+    outputs:
+      matrix: ${{ steps.set-matrix.outputs.matrix }}
+
+    steps:
+      - name: Set up Git repository
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 1
+
+      - name: Install Nix
+        uses: cachix/install-nix-action@v16
+
+      - id: set-matrix
+        run: |
+          echo "::set-output name=matrix::$(
+            nix eval --json --impure \
+              --expr 'builtins.attrNames (import ./.).packages.x86_64-linux'
+          )"
+
   build:
-    name: 'PHP ${{ matrix.php.major }}.${{ matrix.php.minor }}'
-    runs-on: ubuntu-20.04
+    name: "Build #${{ matrix.packages }} on ${{ matrix.operating-system }}"
+    needs: [determine-matrix]
+    runs-on: ${{ matrix.operating-system }}
     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
       # We want to fix failures individually.
       fail-fast: false
+      matrix:
+        packages: ${{fromJson(needs.determine-matrix.outputs.matrix)}}
+        operating-system: [ubuntu-latest, macOS-latest]
+
     steps:
-      - uses: actions/checkout@v2
+      - name: Set up Git repository
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 1
 
       - name: Install Nix
-        uses: cachix/install-nix-action@v14
+        uses: cachix/install-nix-action@v16
 
       - name: Set up Nix cache
         uses: cachix/cachix-action@v10
         with:
           name: fossar
-          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+          authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
 
       - name: Build PHP
-        run: nix-build -A outputs.packages.x86_64-linux.php${{ matrix.php.major }}${{ matrix.php.minor }}
+        run: nix build .#${{ matrix.packages }}
 
       - name: Build Imagick extension
-        run: nix-build -A outputs.packages.x86_64-linux.php${{ matrix.php.major }}${{ matrix.php.minor }}.extensions.imagick
+        run: nix build .#${{ matrix.packages }}.extensions.imagick
 
       - name: Build Redis extension
-        run: nix-build -A outputs.packages.x86_64-linux.php${{ matrix.php.major }}${{ matrix.php.minor }}.extensions.redis
+        run: nix build .#${{ matrix.packages }}.extensions.redis
 
       - name: Build Redis 3 extension
-        if: ${{ matrix.php.major < 8 }}
-        run: nix-build -A outputs.packages.x86_64-linux.php${{ matrix.php.major }}${{ matrix.php.minor }}.extensions.redis3
+        continue-on-error: true
+        run: nix build .#${{ matrix.packages }}.extensions.redis3
 
       - name: Build MySQL extension
-        if: ${{ matrix.php.major < 7 }}
-        run: nix-build -A outputs.packages.x86_64-linux.php${{ matrix.php.major }}${{ matrix.php.minor }}.extensions.mysql
+        continue-on-error: true
+        run: nix build .#${{ matrix.packages }}.extensions.mysql
 
       - name: Build Xdebug extension
-        run: nix-build -A outputs.packages.x86_64-linux.php${{ matrix.php.major }}${{ matrix.php.minor }}.extensions.xdebug
+        run: nix build .#${{ matrix.packages }}.extensions.xdebug
 
       - name: Build Tidy extension
-        run: nix-build -A outputs.packages.x86_64-linux.php${{ matrix.php.major }}${{ matrix.php.minor }}.extensions.tidy
+        run: nix build .#${{ matrix.packages }}.extensions.tidy
 
       - name: Check that composer PHAR works
         run: |
-          nix-shell -E '
+          nix develop --impure --expr '
             let
               self = import ./.;
               composer =
-                self.outputs.packages.${builtins.currentSystem}.php${{ matrix.php.major }}${{ matrix.php.minor }}.packages.composer;
+                self.outputs.packages.x86_64-linux.php73.packages.composer;
               pkgs = import self.inputs.nixpkgs { };
             in
               pkgs.mkShell {
                 packages = [
                   composer
                 ];
               }
-          ' --run "composer --version"
+          ' -c composer --version
 
       - name: Validate php.extensions.mysqli default unix socket path
         run: |
-          nix-shell -E '
+          nix develop --impure --expr '
             let
               self = import ./.;
               php =
-                self.outputs.packages.${builtins.currentSystem}.php${{ matrix.php.major }}${{ matrix.php.minor }}.withExtensions
+                self.outputs.packages.${builtins.currentSystem}.${{ matrix.packages }}.withExtensions
                   ({ all, ... }: [ all.mysqli ]);
               pkgs = import self.inputs.nixpkgs { };
             in
@@ -98,15 +111,15 @@ jobs:
                   php
                 ];
               }
-          ' --run "php -r \"echo ini_get('mysqli.default_socket') . PHP_EOL;\" | grep /run/mysqld/mysqld.sock"
+          ' -c php -r "echo ini_get('mysqli.default_socket') . PHP_EOL;" | grep /run/mysqld/mysqld.sock
 
       - name: Validate php.extensions.pdo_mysql default unix socket path
         run: |
-          nix-shell -E '
+          nix develop --impure --expr '
             let
               self = import ./.;
               php =
-                self.outputs.packages.${builtins.currentSystem}.php${{ matrix.php.major }}${{ matrix.php.minor }}.withExtensions
+                self.outputs.packages.${builtins.currentSystem}.${{ matrix.packages }}.withExtensions
                   ({ all, ... }: [ all.pdo_mysql ]);
               pkgs = import self.inputs.nixpkgs { };
             in
@@ -115,4 +128,4 @@ jobs:
                   php
                 ];
               }
-          ' --run "php -r \"echo ini_get('pdo_mysql.default_socket') . PHP_EOL;\" | grep /run/mysqld/mysqld.sock"
+          ' -c php -r "echo ini_get('pdo_mysql.default_socket') . PHP_EOL;" | grep /run/mysqld/mysqld.sock