Add workflow for building release snapshots (#152)

Use custom caching because goreleaser performs a cross platform build
and therefore we cannot share a cache with the test builds.

.github/workflows/release-snapshot.yml

@@ -0,0 +1,51 @@
+name: release-snapshot
+
+on:
+  push:
+    branches:
+      - main
+
+  workflow_dispatch:
+
+jobs:
+  goreleaser:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository and submodules
+        uses: actions/checkout@v3
+
+      - name: Unshallow
+        run: git fetch --prune --unshallow
+
+      - name: Setup Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: 1.18.8
+
+      - name: Locate cache paths
+        id: cache
+        run: |
+          echo "GOMODCACHE=$(go env GOMODCACHE)" >> $GITHUB_OUTPUT
+          echo "GOCACHE=$(go env GOCACHE)" >> $GITHUB_OUTPUT
+
+      # Note: use custom caching because below performs a cross platform build
+      # through goreleaser and don't want to share a cache with the test builds.
+      - name: Setup caching
+        uses: actions/cache@v3
+        with:
+          path: |
+            ${{ steps.cache.outputs.GOMODCACHE }}
+            ${{ steps.cache.outputs.GOCACHE }}
+          key: release-${{ runner.os }}-go-${{ hashFiles('go.sum', '.goreleaser.yaml') }}
+
+      - name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v4
+        with:
+          version: latest
+          args: release --snapshot
+
+      - name: Upload assets
+        uses: actions/upload-artifact@v3
+        with:
+          name: bricks
+          path: dist/*.zip

.github/workflows/release.yml

@@ -1,8 +1,10 @@
 name: release
+
 on:
   push:
     tags:
       - "v*"
+
   workflow_dispatch:
 
 jobs:
@@ -19,7 +21,22 @@ jobs:
         uses: actions/setup-go@v3
         with:
           go-version: 1.18.8
-          cache: true
+
+      - name: Locate cache paths
+        id: cache
+        run: |
+          echo "GOMODCACHE=$(go env GOMODCACHE)" >> $GITHUB_OUTPUT
+          echo "GOCACHE=$(go env GOCACHE)" >> $GITHUB_OUTPUT
+
+      # Note: use custom caching because goreleaser performs a cross platform build
+      # and therefore we cannot share a cache with the test builds.
+      - name: Setup caching
+        uses: actions/cache@v3
+        with:
+          path: |
+            ${{ steps.cache.outputs.GOMODCACHE }}
+            ${{ steps.cache.outputs.GOCACHE }}
+          key: release-${{ runner.os }}-go-${{ hashFiles('go.sum', '.goreleaser.yaml') }}
 
       - name: Run GoReleaser
         uses: goreleaser/goreleaser-action@v3.1.0