add SLSA goreleaser config for darwin-arm64 (#125)

Signed-off-by: hirokuni-kitahara <[email protected]>

.github/workflows/slsa-goreleaser.yml

@@ -56,6 +56,18 @@ jobs:
       go-version: 1.21
       evaluated-envs: "COMMIT_DATE:${{needs.args.outputs.commit-date}}, COMMIT:${{needs.args.outputs.commit}}, VERSION:${{needs.args.outputs.version}}, TREE_STATE:${{needs.args.outputs.tree-state}}, VERSION_PKG:${{needs.args.outputs.version-package}}"
 
+  build-darwin-arm64:
+    permissions:
+      id-token: write # To sign the provenance.
+      contents: write # To upload assets to release.
+      actions: read # To read the workflow path.
+    needs: args
+    uses: slsa-framework/slsa-github-generator/.github/workflows/[email protected]
+    with:
+      config-file: .slsa-goreleaser-darwin-arm64.yml
+      go-version: 1.21
+      evaluated-envs: "COMMIT_DATE:${{needs.args.outputs.commit-date}}, COMMIT:${{needs.args.outputs.commit}}, VERSION:${{needs.args.outputs.version}}, TREE_STATE:${{needs.args.outputs.tree-state}}, VERSION_PKG:${{needs.args.outputs.version-package}}"
+
   build-windows-amd64:
     permissions:
       id-token: write # To sign the provenance.

.slsa-goreleaser-darwin-arm64.yml

@@ -0,0 +1,36 @@
+# Version for this file.
+version: 1
+
+# (Optional) List of env variables used during compilation.
+env:
+  - GO111MODULE=on
+  - CGO_ENABLED=0
+
+# (Optional) Flags for the compiler.
+flags:
+  - -trimpath
+  - -tags=netgo
+
+# The OS to compile for. `GOOS` env variable will be set to this value.
+goos: darwin
+
+# The architecture to compile for. `GOARCH` env variable will be set to this value.
+goarch: arm64
+
+# (Optional) Entrypoint to compile.
+main: ./cmd/kubectl-sigstore
+
+# (Optional) Working directory. (default: root of the project)
+# dir: ./relative/path/to/dir
+
+# Binary output name.
+# {{ .Os }} will be replaced by goos field in the config file.
+# {{ .Arch }} will be replaced by goarch field in the config file.
+binary: kubectl-sigstore-darwin-arm64
+
+# (Optional) ldflags generated dynamically in the workflow, and set as the `evaluated-envs` input variables in the workflow.
+ldflags:
+  - "-X '{{ .Env.VERSION_PKG }}.GitVersion={{ .Env.VERSION }}'"
+  - "-X '{{ .Env.VERSION_PKG }}.gitCommit={{ .Env.COMMIT }}'"
+  - "-X '{{ .Env.VERSION_PKG }}.buildDate={{ .Env.COMMIT_DATE }}'"
+  - "-X '{{ .Env.VERSION_PKG }}.gitTreeState={{ .Env.TREE_STATE }}'"