[master] Update GitHub Actions (#332)

Copied from `https://github.com/knative/.github/tree/master/workflow-templates`.
/assign n3wscott vagababov
/cc n3wscott vagababov

.github/workflows/knative-go-build.yaml

@@ -47,8 +47,17 @@ jobs:
         with:
           fetch-depth: 1
 
-      - name: Vet
-        run: go vet ./...
-
       - name: Build
-        run: go build -v ./...
+        run: |
+          tags="$(grep -I  -r '// +build' . | \
+                grep -v '^./vendor/' | \
+                grep -v '^./hack/' | \
+                grep -v '^./third_party' | \
+                cut -f3 -d' ' | \
+                sort | uniq | \
+                grep -v '^!' | \
+                tr '\n' ' ')"
+
+          echo "Building with tags: ${tags}"
+          go test -vet=off -tags "${tags}" -run=^$ ./... | grep -v "no test" || true
+

.github/workflows/knative-style.yaml

@@ -72,3 +72,40 @@ jobs:
         with:
           version: v1.30
           only-new-issues: true # for initial defensiveness
+
+      # This is mostly copied from https://github.com/get-woke/woke-action-reviewdog/blob/main/entrypoint.sh
+      # since their action is not yet released under a stable version.
+      - name: Language
+        shell: bash
+        env:
+          REVIEWDOG_GITHUB_API_TOKEN: ${{ github.token }}
+          WOKE_VERSION: v0.1.11
+        run: |
+          set -e
+          cd "${GITHUB_WORKSPACE}" || exit 1
+
+          TEMP_PATH="$(mktemp -d)"
+          PATH="${TEMP_PATH}:$PATH"
+
+          echo '::group::🐶 Installing reviewdog ... https://github.com/reviewdog/reviewdog'
+          curl -sfL https://raw.githubusercontent.com/reviewdog/reviewdog/master/install.sh | sh -s -- -b "${TEMP_PATH}" 2>&1
+          echo '::endgroup::'
+
+          echo '::group:: Installing woke ... https://github.com/get-woke/woke'
+          curl -sfL https://raw.githubusercontent.com/get-woke/woke/main/install.sh | sh -s -- -b "${TEMP_PATH}" "${WOKE_VERSION}" 2>&1
+          echo '::endgroup::'
+
+          # Create a minimal .wokeignore if none already exist.
+          if [ ! -f .wokeignore ]; then
+            echo "vendor\nthird_party" > .wokeignore
+          fi
+
+          echo '::group:: Running woke with reviewdog 🐶 ...'
+          woke --output simple \
+            | reviewdog -efm="%f:%l:%c: %m" \
+                -name="woke" \
+                -reporter="github-pr-check" \
+                -filter-mode="added" \
+                -fail-on-error="true" \
+                -level="error" \
+          echo '::endgroup::'