Add IsActionsWorkflow

Author: mbg

go/extractor/cli/go-autobuilder/go-autobuilder.go

@@ -565,7 +565,7 @@ func installDependenciesAndBuild() {
 	// Go tooling should install required Go versions as needed.
 	if toolchain.GetEnvGoSemVer().IsOlderThan(toolchain.V1_21) && greatestGoVersion != nil && greatestGoVersion.IsNewerThan(toolchain.GetEnvGoSemVer()) {
 		diagnostics.EmitNewerGoVersionNeeded(toolchain.GetEnvGoSemVer().String(), greatestGoVersion.String())
-		if val, _ := os.LookupEnv("GITHUB_ACTIONS"); val == "true" {
+		if util.IsActionsWorkflow() {
 			log.Printf(
 				"A go.mod file requires version %s of Go, but version %s is installed. Consider adding an actions/setup-go step to your workflow.\n",
 				greatestGoVersion,

go/extractor/util/util.go

@@ -313,6 +313,12 @@ func IsGolangVendorDirectory(dirPath string) bool {
 			fileExists(filepath.Join(dirPath, "../vendor.conf")))
 }
 
+// Returns true if the `GITHUB_ACTIONS` environment variable is set to `true`.
+// This is the case in GitHub Actions workflows.
+func IsActionsWorkflow() bool {
+	return os.Getenv("GITHUB_ACTIONS") == "true"
+}
+
 // Returns true if the `GITHUB_EVENT_NAME` environment variable is set and suggests that
 // we are running in a GitHub Actions workflow that was triggered by the `dynamic` event.
 // This is the case for e.g. Default Setup.