Add build timestamp to the --version output

Taskfile.yml

@@ -184,8 +184,10 @@ vars:
   # build vars
   COMMIT:
     sh: echo "$(git log -n 1 --format=%h)"
+  TIMESTAMP:
+    sh: echo "$(date -u +"%Y-%m-%dT%H:%M:%SZ")"
   LDFLAGS: >
-    -ldflags '-X github.com/arduino/arduino-check/configuration.commit={{.COMMIT}}'
+    -ldflags '-X github.com/arduino/arduino-check/configuration.commit={{.COMMIT}} -X github.com/arduino/arduino-check/configuration.buildTimestamp={{.TIMESTAMP}}'
   GOFLAGS: "-timeout 10m -v -coverpkg=./... -covermode=atomic"
 
   GOLINTFLAGS: "-min_confidence 0.8 -set_exit_status"

cli/cli.go

@@ -39,7 +39,7 @@ func Root() *cobra.Command {
 	rootCommand.PersistentFlags().String("project-type", "all", "Only check projects of the specified type and their subprojects. Can be {sketch|library|all}.")
 	rootCommand.PersistentFlags().Bool("recursive", true, "Search path recursively for Arduino projects to check. Can be {true|false}.")
 	rootCommand.PersistentFlags().String("report-file", "", "Save a report on the checks to this file.")
-	rootCommand.PersistentFlags().Bool("version", false, "Print version.")
+	rootCommand.PersistentFlags().Bool("version", false, "Print version and timestamp of the build.")
 
 	return rootCommand
 }

command/command.go

@@ -39,12 +39,14 @@ func ArduinoCheck(rootCommand *cobra.Command, cliArguments []string) {
 
 	if configuration.VersionMode() {
 		if configuration.OutputFormat() == outputformat.Text {
-			fmt.Println(configuration.Version())
+			fmt.Println(configuration.Version() + " " + configuration.BuildTimestamp())
 		} else {
 			versionObject := struct {
-				Version string `json:"version"`
+				Version        string `json:"version"`
+				BuildTimestamp string `json:"buildTimestamp"`
 			}{
-				Version: configuration.Version(),
+				Version:        configuration.Version(),
+				BuildTimestamp: configuration.BuildTimestamp(),
 			}
 			versionJSON, err := json.MarshalIndent(versionObject, "", "  ")
 			if err != nil {

configuration/configuration.go

@@ -193,6 +193,12 @@ func Version() string {
 	return version
 }
 
+var buildTimestamp string
+
+func BuildTimestamp() string {
+	return buildTimestamp
+}
+
 var targetPaths paths.PathList
 
 // TargetPaths returns the projects search paths.

configuration/configuration_test.go

@@ -220,3 +220,8 @@ func TestVersion(t *testing.T) {
 	version = "42.1.2"
 	assert.Equal(t, version, Version())
 }
+
+func TestBuildTimestamp(t *testing.T) {
+	buildTimestamp = "2020-11-27T04:05:19+00:00"
+	assert.Equal(t, buildTimestamp, BuildTimestamp())
+}