Add --version flag with build-time version injection

Author: agrieser

.github/workflows/release.yml

@@ -23,12 +23,14 @@ jobs:
 
       - name: Build binaries
         run: |
+          VERSION=${GITHUB_REF_NAME}
+          LDFLAGS="-s -w -X main.version=${VERSION}"
           mkdir -p dist
-          GOOS=darwin GOARCH=arm64 go build -o dist/pr-patrol-darwin-arm64 .
-          GOOS=darwin GOARCH=amd64 go build -o dist/pr-patrol-darwin-amd64 .
-          GOOS=linux GOARCH=amd64 go build -o dist/pr-patrol-linux-amd64 .
-          GOOS=linux GOARCH=arm64 go build -o dist/pr-patrol-linux-arm64 .
-          GOOS=windows GOARCH=amd64 go build -o dist/pr-patrol-windows-amd64.exe .
+          GOOS=darwin GOARCH=arm64 go build -ldflags "${LDFLAGS}" -o dist/pr-patrol-darwin-arm64 .
+          GOOS=darwin GOARCH=amd64 go build -ldflags "${LDFLAGS}" -o dist/pr-patrol-darwin-amd64 .
+          GOOS=linux GOARCH=amd64 go build -ldflags "${LDFLAGS}" -o dist/pr-patrol-linux-amd64 .
+          GOOS=linux GOARCH=arm64 go build -ldflags "${LDFLAGS}" -o dist/pr-patrol-linux-arm64 .
+          GOOS=windows GOARCH=amd64 go build -ldflags "${LDFLAGS}" -o dist/pr-patrol-windows-amd64.exe .
 
       - name: Create release
         uses: softprops/action-gh-release@v2

main.go

@@ -9,6 +9,8 @@ import (
 	pflag "github.com/spf13/pflag"
 )
 
+var version = "dev"
+
 func main() {
 	org := pflag.String("org", "", "GitHub organization (or set GITHUB_ORG)")
 	plain := pflag.Bool("plain", false, "Plain text output (no TUI)")
@@ -19,8 +21,14 @@ func main() {
 	dismissRepos := pflag.StringSlice("dismiss-repos", nil, "Repos to hide (comma-separated)")
 	debug := pflag.Bool("debug", false, "Print debug info for review classification")
 	demo := pflag.Bool("demo", false, "Show demo data (for screenshots)")
+	showVersion := pflag.Bool("version", false, "Print version and exit")
 	pflag.Parse()
 
+	if *showVersion {
+		fmt.Println("pr-patrol " + version)
+		return
+	}
+
 	if *org == "" {
 		*org = os.Getenv("GITHUB_ORG")
 	}