ci: split cross-build check into separate workflow

.github/workflows/ci.yml

@@ -1,6 +1,6 @@
 # Used as inspiration: https://github.com/mvdan/github-actions-golang
 
-name: Cross-Platform
+name: Cross-Platform Tests
 
 on:
   push:
@@ -120,52 +120,6 @@ jobs:
     #     echo "step_test ${{ steps.step_test.outputs.status }}\n"
     #     exit 1
 
-  cross-build-check:
-    name: Cross-Build Check
-    runs-on: ubuntu-latest
-    continue-on-error: true
-    steps:
-      - name: Print Go version and environment
-        id: vars
-        run: |
-          printf "Using go at: $(which go)\n"
-          printf "Go version: $(go version)\n"
-          printf "\n\nGo environment:\n\n"
-          go env
-          printf "\n\nSystem environment:\n\n"
-          env
-          echo "::set-output name=go_cache::$(go env GOCACHE)"
-      - name: Cache the build cache
-        uses: actions/cache@v1
-        with:
-          path: ${{ steps.vars.outputs.go_cache }}
-          key: cross-build-go-ci-${{ hashFiles('**/go.sum') }}
-          restore-keys: |
-            cross-build-go-ci
-      - name: Checkout code into the Go module directory
-        uses: actions/checkout@v2
-      - name: Run Builds
-        env:
-          CGO_ENABLED: '0'
-        shell: bash
-        working-directory: ./cmd/caddy
-        run: |
-
-          geese=('android' 'linux' 'solaris' 'illumos' 'dragonfly' 'freebsd' 'openbsd' 'plan9' 'windows' 'darwin' 'netbsd')
-          failed=()
-          for GOOS in "${geese[@]}"; do
-            echo "Building GOOS: $GOOS"
-            GOOS=$GOOS go build -trimpath -o caddy-"$GOOS"-amd64 || {
-              echo "Failed: $GOOS"
-              failed+=("$GOOS")
-            }
-          done
-
-          if [ ${#failed[@]} -ne 0 ]; then
-            echo "The following geese failed: " "${failed[@]}"
-            exit 1
-          fi
-
   s390x-test:
     name: test (s390x on IBM Z)
     runs-on: ubuntu-latest

.github/workflows/cross-build.yml

@@ -0,0 +1,50 @@
+name: Cross-Build Check
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  cross-build-test:
+    strategy:
+      fail-fast: false
+      matrix:
+        goos: ['android', 'linux', 'solaris', 'illumos', 'dragonfly', 'freebsd', 'openbsd', 'plan9', 'windows', 'darwin', 'netbsd']
+        go-version: [ 1.14.x ]
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    steps:
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go-version }}
+      - name: Print Go version and environment
+        id: vars
+        run: |
+          printf "Using go at: $(which go)\n"
+          printf "Go version: $(go version)\n"
+          printf "\n\nGo environment:\n\n"
+          go env
+          printf "\n\nSystem environment:\n\n"
+          env
+          echo "::set-output name=go_cache::$(go env GOCACHE)"
+      - name: Cache the build cache
+        uses: actions/cache@v1
+        with:
+          path: ${{ steps.vars.outputs.go_cache }}
+          key: cross-build-go-${{ runner.goos }}-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            cross-build-go-${{ runner.goos }}
+      - name: Checkout code into the Go module directory
+        uses: actions/checkout@v2
+      - name: Run Build
+        env:
+          CGO_ENABLED: 0
+          GOOS: ${{ runner.goos }}
+        shell: bash
+        working-directory: ./cmd/caddy
+        run: go build -trimpath -o caddy-"$GOOS"-amd64