fix: homebrew packaging

- Adjusted Homebrew cask to use custom_block for shell completions
- Ensured bash, zsh, and fish completions are generated and installed
- Improved compatibility with Homebrew packaging requirements

Fixes openshift-pipelines#2182
Jira: https://issues.redhat.com/browse/SRVKP-8197

Signed-off-by: Chmouel Boudjnah <[email protected]>

Author: chmouel

.goreleaser.yml

@@ -38,7 +38,9 @@ archives:
       {{- else }}{{ .Arch }}{{ end }}
     format_overrides:
       - goos: windows
-      - formats: zip
+        formats: ["zip"]
+      - goos: darwin
+        formats: ["zip"]
 checksum:
   name_template: "checksums.txt"
 snapshot:
@@ -84,15 +86,25 @@ homebrew_casks:
       - formula: git
     homepage: "https://pipelinesascode.com"
     description: tkn-pac - A command line interface for interacting with Pipelines as Code
-    hooks:
-      pre:
-        install: |
-          bin.install "tkn-pac" => "tkn-pac"
-          output = Utils.popen_read("SHELL=bash #{bin}/tkn-pac completion bash")
-          (bash_completion/"tkn-pac").write output
-          output = Utils.popen_read("SHELL=zsh #{bin}/tkn-pac completion zsh")
-          (zsh_completion/"_tkn-pac").write output
-          prefix.install_metafiles
+    binary: "tkn-pac"
+    custom_block: |
+      zsh_completion = "#{staged_path}/_tkn-pac"
+      bash_completion = "#{staged_path}/tkn-pac.bash"
+      fish_completion = "#{staged_path}/tkn-pac.fish"
+
+      preflight do
+        stdout, * = system_command "#{staged_path}/tkn-pac", args: ["completion", "bash"]
+        File.write bash_completion, stdout
+        stdout, * = system_command "#{staged_path}/tkn-pac", args: ["completion", "zsh"]
+        File.write zsh_completion, stdout
+        stdout, * = system_command "#{staged_path}/tkn-pac", args: ["completion", "fish"]
+        File.write fish_completion, stdout
+      end
+
+      binary zsh_completion, target: "#{HOMEBREW_PREFIX}/share/zsh/site-functions/_tkn-pac"
+      binary bash_completion, target: "#{HOMEBREW_PREFIX}/etc/bash_completion.d/tkn-pac"
+      binary fish_completion, target: "#{HOMEBREW_PREFIX}/share/fish/vendor_completions.d/tkn-pac.fish"
+
 nfpms:
   - file_name_template: >-
       tkn-pac-