Add version command and inject version at build time

Author: phealy

.github/workflows/release.yml

@@ -40,13 +40,19 @@ jobs:
         with:
           go-version: '1.21'
 
+      - name: Get version
+        id: version
+        run: |
+          VERSION=${GITHUB_REF_NAME:-dev}
+          echo "version=$VERSION" >> $GITHUB_OUTPUT
+
       - name: Build binary
         env:
           GOOS: ${{ matrix.goos }}
           GOARCH: ${{ matrix.goarch }}
           CGO_ENABLED: '0'
         run: |
-          go build -ldflags="-s -w" -o git-credential-azure-cli-${{ matrix.goos }}-${{ matrix.goarch }}${{ matrix.suffix }} .
+          go build -ldflags="-s -w -X main.version=${{ steps.version.outputs.version }}" -o git-credential-azure-cli-${{ matrix.goos }}-${{ matrix.goarch }}${{ matrix.suffix }} .
 
       - name: Upload artifact
         uses: actions/upload-artifact@v4

main.go

@@ -41,6 +41,9 @@ import (
 	"github.com/spf13/cobra"
 )
 
+// Version information (set via ldflags at build time)
+var version = "dev"
+
 var defaultAllowedDomains = []string{"visualstudio.com", "dev.azure.com"}
 
 // Resource overrides for hosts that need a different token resource.
@@ -463,8 +466,18 @@ Usage:
 		},
 	}
 
+	// Version command
+	var versionCmd = &cobra.Command{
+		Use:   "version",
+		Short: "Print the version number",
+		Run: func(cmd *cobra.Command, args []string) {
+			fmt.Println(version)
+		},
+	}
+
 	rootCmd.AddCommand(storeCmd)
 	rootCmd.AddCommand(eraseCmd)
+	rootCmd.AddCommand(versionCmd)
 
 	if err := rootCmd.Execute(); err != nil {
 		os.Exit(1)