goreleaser: refactor brew formula

Fixes #1909

.goreleaser.yml

@@ -74,67 +74,38 @@ snapcrafts:
           - "network"
 brews:
   - name: "{{.ProjectName}}"
-    repository:
-      owner: "authzed"
-      name: "homebrew-tap"
-      token: "{{ .Env.HOMEBREW_TAP_GITHUB_TOKEN }}"
-    url_template: "https://github.com/authzed/spicedb/releases/download/{{ .Tag }}/{{ .ArtifactName }}"
-    download_strategy: "CurlDownloadStrategy"
-    commit_author:
-      name: "authzedbot"
-      email: "infrastructure@authzed.com"
-    commit_msg_template: "Brew formula update for {{ .ProjectName }} version {{ .Tag }}"
-    homepage: "https://authzed.com/"
-    description: "SpiceDB is a Zanzibar-inspired database that stores, computes, and validates application permissions."
-    license: "Apache-2.0"
-    directory: "Formula"
-    skip_upload: "auto"
-    custom_block: |
-      head "https://github.com/authzed/spicedb.git", :branch => "main"
-    dependencies:
-      - name: "go"
-        type: "build"
-    test: |
-      system "#{bin}/spicedb version"
-    install: |
-      if !File.exists? "spicedb"
-        system "go build --ldflags \"-s -w -X github.com/jzelinskie/cobrautil/v2.Version=$(git describe --always --abbrev=7 --dirty --tags)\" ./cmd/spicedb"
-      end
-      bin.install "spicedb"
-      (bash_completion/"spicedb").write Utils.safe_popen_read("#{bin}/spicedb", "completion", "bash")
-      (zsh_completion/"_spicedb").write Utils.safe_popen_read("#{bin}/spicedb", "completion", "zsh")
-      (fish_completion/"spicedb.fish").write Utils.safe_popen_read("#{bin}/spicedb", "completion", "fish")
+    <<: &brew-shared
+      description: "Google Zanzibar-inspired permissions database for fine-grained access control"
+      homepage: "https://github.com/authzed/spicedb"
+      license: "Apache-2.0"
+      dependencies:
+        - name: "go"
+          type: "build"
+      custom_block: |
+        head "https://github.com/authzed/spicedb.git", :branch => "main"
+      url_template: "https://github.com/authzed/spicedb/releases/download/{{ .Tag }}/{{ .ArtifactName }}"
+      install: |
+        unless File.exist? "spicedb"
+          versionVar = "github.com/jzelinskie/cobrautil/v2.Version"
+          versionCmd = "$(git describe --always --abbrev=7 --dirty --tags)"
+          system "go build --ldflags '-s -w -X #{versionVar}=#{versionCmd}' ./cmd/spicedb"
+        end
+        bin.install "spicedb"
+        generate_completions_from_executable(bin/"spicedb", "completion", shells: [:bash, :zsh, :fish])
+      test: |
+        system "#{bin}/spicedb version"
+      repository:
+        owner: "authzed"
+        name: "homebrew-tap"
+        token: "{{ .Env.HOMEBREW_TAP_GITHUB_TOKEN }}"
+      commit_author:
+        name: "authzedbot"
+        email: "[email protected]"
+      commit_msg_template: "Brew formula update for {{ .ProjectName }} version {{ .Tag }}"
+      directory: "Formula"
+      skip_upload: "auto"
   - name: "{{.ProjectName}}@{{.Version}}"
-    repository:
-      owner: "authzed"
-      name: "homebrew-tap"
-      token: "{{ .Env.HOMEBREW_TAP_GITHUB_TOKEN }}"
-    url_template: "https://github.com/authzed/spicedb/releases/download/{{ .Tag }}/{{ .ArtifactName }}"
-    download_strategy: "CurlDownloadStrategy"
-    commit_author:
-      name: "authzedbot"
-      email: "[email protected]"
-    commit_msg_template: "Brew formula update for {{ .ProjectName }} version {{ .Tag }}"
-    homepage: "https://authzed.com/"
-    description: "SpiceDB is a Zanzibar-inspired database that stores, computes, and validates application permissions."
-    license: "Apache-2.0"
-    directory: "Formula"
-    skip_upload: "auto"
-    custom_block: |
-      head "https://github.com/authzed/spicedb.git", :branch => "main"
-    dependencies:
-      - name: "go"
-        type: "build"
-    test: |
-      system "#{bin}/spicedb version"
-    install: |
-      if !File.exists? "spicedb"
-        system "go build --ldflags \"-s -w -X github.com/jzelinskie/cobrautil/v2.Version=$(git describe --always --abbrev=7 --dirty --tags)\" ./cmd/spicedb"
-      end
-      bin.install "spicedb"
-      bash_completion.install "completions/spicedb.bash" => "spicedb"
-      zsh_completion.install "completions/spicedb.zsh" => "_spicedb"
-      fish_completion.install "completions/spicedb.fish"
+    <<: *brew-shared
 dockers:
   # AMD64
   - image_templates: