show version number

Author: manicminer

.github/workflows/release.yaml

@@ -29,7 +29,7 @@ jobs:
       - name: Build
         run: |
           mkdir -p dist
-          CGO_ENABLED=0 GOOS=${{ matrix.goos }} GOARCH=${{ matrix.goarch }} go build -o dist/gitlab-migrator-${{ matrix.goos }}-${{ matrix.goarch }}
+          CGO_ENABLED=0 GOOS=${{ matrix.goos }} GOARCH=${{ matrix.goarch }} go build -ldflags="-X 'main.version=$(git describe --tags --abbrev=8 --dirty --always)'" -o dist/gitlab-migrator-${{ matrix.goos }}-${{ matrix.goarch }}
 
       - name: Upload binaries
         uses: actions/upload-artifact@v4

main.go

@@ -40,6 +40,7 @@ var (
 	gh             *github.Client
 	gl             *gitlab.Client
 	maxConcurrency int
+	version        = "development"
 )
 
 type Project = []string
@@ -97,13 +98,17 @@ func main() {
 		os.Exit(1)
 	}
 
+	var showVersion bool
+	fmt.Printf(fmt.Sprintf("gitlab-migrator %s\n", version))
+
 	flag.BoolVar(&loop, "loop", false, "continue migrating until canceled")
 	flag.BoolVar(&report, "report", false, "report on primitives to be migrated instead of beginning migration")
 
 	flag.BoolVar(&deleteExistingRepos, "delete-existing-repos", false, "whether existing repositories should be deleted before migrating")
 	flag.BoolVar(&enablePullRequests, "migrate-pull-requests", false, "whether pull requests should be migrated")
 	flag.BoolVar(&renameMasterToMain, "rename-master-to-main", false, "rename master branch to main and update pull requests (incompatible with -rename-trunk-branch)")
 	flag.BoolVar(&skipInvalidMergeRequests, "skip-invalid-merge-requests", false, "when true, will log and skip invalid merge requests instead of raising an error")
+	flag.BoolVar(&showVersion, "version", false, "output version information")
 
 	flag.StringVar(&githubDomain, "github-domain", defaultGithubDomain, "specifies the GitHub domain to use")
 	flag.StringVar(&githubRepo, "github-repo", "", "the GitHub repository to migrate to")
@@ -117,6 +122,10 @@ func main() {
 
 	flag.Parse()
 
+	if showVersion {
+		return
+	}
+
 	if githubUser == "" {
 		githubUser = os.Getenv("GITHUB_USER")
 	}