chore: import the ACT test workflow

- remove go vet and build as they are now redundant
- replace ./pkg with ./act
- rename the workflow from test to act to distinguish it from the
  runner workflow

cleanup and factorization with the runner workflow is left for later

.forgejo/workflows/act.yml

@@ -0,0 +1,78 @@
+name: act
+on:
+  push:
+    branches:
+      - 'main'
+  pull_request:
+
+env:
+  GOPROXY: https://goproxy.io,direct
+  GOPATH: /go_path
+  GOCACHE: /go_cache
+
+jobs:
+  unit:
+    runs-on: docker
+    container:
+      image: 'code.forgejo.org/oci/node:22-bookworm'
+    steps:
+      - name: cache go path
+        id: cache-go-path
+        uses: https://code.forgejo.org/actions/cache@v4
+        with:
+          path: /go_path
+          key: go_path-${{ forge.repository }}-${{ forge.ref_name }}
+          restore-keys: |
+            go_path-${{ forge.repository }}-
+            go_path-
+      - name: cache go cache
+        id: cache-go-cache
+        uses: https://code.forgejo.org/actions/cache@v4
+        with:
+          path: /go_cache
+          key: go_cache-${{ forge.repository }}-${{ forge.ref_name }}
+          restore-keys: |
+            go_cache-${{ forge.repository }}-
+            go_cache-
+
+      - uses: https://code.forgejo.org/actions/checkout@v4
+
+      - uses: https://code.forgejo.org/actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+
+      - name: validate go version
+        run: |
+          set -ex
+          toolchain=$(grep -oP '(?<=toolchain ).+' go.mod)
+          version=$(go version | cut -d' ' -f3)
+          if dpkg --compare-versions ${version#go} lt ${toolchain#go}; then
+            echo "go version too low: $toolchain >= $version"
+            exit 1
+          fi
+
+      - name: unit test
+        run: |
+          go test -short -v ./act/container
+          go test -v ./act/artifactcache/... ./act/workflowpattern/... ./act/filecollector/... ./act/common/... ./act/jobparser ./act/model ./act/exprparser ./act/schema
+
+  integration:
+    runs-on: lxc-bookworm
+    needs: [unit]
+    steps:
+      - uses: https://code.forgejo.org/actions/checkout@v4
+
+      - uses: https://code.forgejo.org/actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+
+      - name: apt install docker.io
+        run: |
+          export DEBIAN_FRONTEND=noninteractive
+          apt-get update -qq
+          apt-get -q install -qq -y docker.io
+
+      - name: integration test
+        run: |
+          go test -v ./act/container
+          go test -v ./act/runner/...

act/runner/run_context_test.go

@@ -318,7 +318,7 @@ func TestRunContext_GetGitHubContext(t *testing.T) {
 		actor = a
 	}
 
-	repo := "forgejo/act"
+	repo := "forgejo/runner"
 	if r := os.Getenv("ACT_REPOSITORY"); r != "" {
 		repo = r
 	}

act/runner/step_action_local_test.go

@@ -262,7 +262,7 @@ func TestStepActionLocalPost(t *testing.T) {
 						return strings.HasSuffix(array[1], suffix)
 					})
 				}
-				cm.On("Exec", suffixMatcher("pkg/runner/local/action/post.js"), sal.env, "", "").Return(func(ctx context.Context) error { return tt.err })
+				cm.On("Exec", suffixMatcher("act/runner/local/action/post.js"), sal.env, "", "").Return(func(ctx context.Context) error { return tt.err })
 
 				cm.On("Copy", "/var/run/act", mock.AnythingOfType("[]*container.FileEntry")).Return(func(ctx context.Context) error {
 					return nil