build: Pin GitHub Actions

The main benefit of pinning GitHub actions is the determinism it brings
in terms of what version of a given action will be executed. This is
a step towards having hermetic builds.

Once pinned to a commit, dependabot will automatically issue PRs to update
to newer versions.

Pinned versions is the only security metric from OpenSSF scorecard that
this repository currently have a zero score.

Signed-off-by: Paulo Gomes <paulo.gomes@weave.works>

.github/workflows/release.yaml

@@ -16,32 +16,32 @@ jobs:
       packages: write # needed for ghcr access
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
       - name: Unshallow
         run: git fetch --prune --unshallow
       - name: Setup Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@c4a742cab115ed795e34d4513e2cf7d472deb55f
         with:
           go-version: 1.19.x
       - name: Setup QEMU
-        uses: docker/setup-qemu-action@v2
+        uses: docker/setup-qemu-action@e81a89b1732b9c48d79cd809d8d81d79c4647a18 # v2
       - name: Setup Docker Buildx
         id: buildx
-        uses: docker/setup-buildx-action@v2
+        uses: docker/setup-buildx-action@8c0edbc76e98fa90f69d9a2c020dcb50019dc325  # v2
       - name: Setup Syft
-        uses: anchore/sbom-action/download-syft@v0
+        uses: anchore/sbom-action/download-syft@06e109483e6aa305a2b2395eabae554e51530e1d # v0.13.1
       - name: Setup Cosign
-        uses: sigstore/cosign-installer@main
+        uses: sigstore/cosign-installer@7bca8b41164994a7dc93749d266e2f1db492f8a2
       - name: Setup Kustomize
         uses: fluxcd/pkg//actions/kustomize@main
       - name: Login to GitHub Container Registry
-        uses: docker/login-action@v2
+        uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a # v2
         with:
           registry: ghcr.io
           username: fluxcdbot
           password: ${{ secrets.GHCR_TOKEN }}
       - name: Login to Docker Hub
-        uses: docker/login-action@v2
+        uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a  # v2
         with:
           username: fluxcdbot
           password: ${{ secrets.DOCKER_FLUXCD_PASSWORD }}
@@ -53,10 +53,8 @@ jobs:
       - name: Build CRDs
         run: |
           kustomize build manifests/crds > all-crds.yaml
-      # Pinned to commit before https://github.com/fluxcd/pkg/pull/189 due to
-      # introduction faulty behavior.
       - name: Generate OpenAPI JSON schemas from CRDs
-        uses: fluxcd/pkg//actions/crdjsonschema@49e26aa2ee9e734c3233c560253fd9542afe18ae
+        uses: fluxcd/pkg//actions/crdjsonschema@main
         with:
           crd: all-crds.yaml
           output: schemas
@@ -75,7 +73,7 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - name: Run GoReleaser
-        uses: goreleaser/goreleaser-action@v3
+        uses: goreleaser/goreleaser-action@b508e2e3ef3b19d4e4146d4f8fb3ba9db644a757 # v3
         with:
           version: latest
           args: release --release-notes=output/notes.md --skip-validate
@@ -90,7 +88,7 @@ jobs:
       id-token: write
       packages: write
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
       - name: Setup Kustomize
         uses: fluxcd/pkg/actions/kustomize@main
       - name: Setup Flux CLI
@@ -101,13 +99,13 @@ jobs:
           VERSION=$(flux version --client | awk '{ print $NF }')
           echo ::set-output name=VERSION::${VERSION}
       - name: Login to GHCR
-        uses: docker/login-action@v2
+        uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a # v2
         with:
           registry: ghcr.io
           username: fluxcdbot
           password: ${{ secrets.GHCR_TOKEN }}
       - name: Login to DockerHub
-        uses: docker/login-action@v2
+        uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a # v2
         with:
           username: fluxcdbot
           password: ${{ secrets.DOCKER_FLUXCD_PASSWORD }}
@@ -135,7 +133,7 @@ jobs:
           --path="./flux-system" \
           --source=${{ github.repositoryUrl }} \
           --revision="${{ github.ref_name }}/${{ github.sha }}"
-      - uses: sigstore/cosign-installer@main
+      - uses: sigstore/cosign-installer@7cc35d7fdbe70d4278a0c96779081e6fac665f88 # v2.8.0
       - name: Sign manifests
         env:
           COSIGN_EXPERIMENTAL: 1