feat(#72): print version (#76)

Makefile

@@ -5,15 +5,17 @@ VERSION?=${shell git describe --tags}
 
 all: lint test build
 
-run:
-	@echo "building ${VERSION}"
-	go run ./cmd/jlv assets/example.log
-.PHONY: build
+run: build
+	./bin/jlv assets/example.log
+.PHONY: run
 
-run.stdin:
-	@echo "building ${VERSION}"
-	go run ./cmd/jlv < assets/example.log
-.PHONY: build
+run.version: build
+	./bin/jlv --version
+.PHONY: run.version
+
+run.stdin: build
+	./bin/jlv < assets/example.log
+.PHONY: run.stdin
 
 build:
 	@echo "building ${VERSION}"

cmd/jlv/main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"bytes"
 	"flag"
 	"fmt"
 	"os"
@@ -15,12 +16,23 @@ import (
 	"github.com/hedhyw/json-log-viewer/internal/pkg/source/readerinput"
 )
 
+// version will be set on build.
+var version = "development"
+
 const configFileName = ".jlv.jsonc"
 
 func main() {
 	configPath := flag.String("config", "", "Path to the config")
+	printVersion := flag.Bool("version", false, "Print version")
 	flag.Parse()
 
+	if *printVersion {
+		// nolint: forbidigo // Version command.
+		print("github.com/hedhyw/json-log-viewer@" + version + "\n")
+
+		return
+	}
+
 	cfg, err := readConfig(*configPath)
 	if err != nil {
 		fatalf("Error reading config: %s\n", err)
@@ -30,21 +42,37 @@ func main() {
 
 	switch flag.NArg() {
 	case 0:
-		sourceInput = readerinput.New(os.Stdin, cfg.StdinReadTimeout)
+		sourceInput, err = getStdinSource(cfg)
+		if err != nil {
+			fatalf("Stdin: %s\n", err)
+		}
 	case 1:
 		sourceInput = fileinput.New(flag.Arg(0))
 	default:
 		fatalf("Invalid arguments, usage: %s file.log\n", os.Args[0])
 	}
 
-	appModel := app.NewModel(sourceInput, cfg)
-	program := tea.NewProgram(appModel, tea.WithAltScreen())
+	appModel := app.NewModel(sourceInput, cfg, version)
+	program := tea.NewProgram(appModel, tea.WithInputTTY(), tea.WithAltScreen())
 
 	if _, err := program.Run(); err != nil {
 		fatalf("Error running program: %s\n", err)
 	}
 }
 
+func getStdinSource(cfg *config.Config) (source.Input, error) {
+	stat, err := os.Stdin.Stat()
+	if err != nil {
+		return nil, fmt.Errorf("stat: %w", err)
+	}
+
+	if stat.Mode()&os.ModeNamedPipe == 0 {
+		return readerinput.New(bytes.NewReader(nil), cfg.StdinReadTimeout), nil
+	}
+
+	return readerinput.New(os.Stdin, cfg.StdinReadTimeout), nil
+}
+
 func fatalf(message string, args ...any) {
 	fmt.Fprintf(os.Stderr, message, args...)
 	os.Exit(1)

internal/app/app.go

@@ -17,9 +17,15 @@ type Application struct {
 	FooterStyle lipgloss.Style
 
 	LastWindowSize tea.WindowSizeMsg
+
+	Version string
 }
 
-func newApplication(sourceInput source.Input, config *config.Config) Application {
+func newApplication(
+	sourceInput source.Input,
+	config *config.Config,
+	version string,
+) Application {
 	const (
 		initialWidth  = 70
 		initialHeight = 20
@@ -36,11 +42,17 @@ func newApplication(sourceInput source.Input, config *config.Config) Application
 			Width:  initialWidth,
 			Height: initialHeight,
 		},
+
+		Version: version,
 	}
 }
 
 // NewModel initializes a new application model. It accept the path
 // to the file with logs.
-func NewModel(sourceInput source.Input, config *config.Config) tea.Model {
-	return newStateInitial(newApplication(sourceInput, config))
+func NewModel(
+	sourceInput source.Input,
+	config *config.Config,
+	version string,
+) tea.Model {
+	return newStateInitial(newApplication(sourceInput, config, version))
 }

internal/app/app_test.go

@@ -14,12 +14,14 @@ import (
 	"github.com/hedhyw/json-log-viewer/internal/pkg/tests"
 )
 
+const testVersion = "v0.0.1"
+
 func newTestModel(tb testing.TB, content []byte) tea.Model {
 	tb.Helper()
 
 	testFile := tests.RequireCreateFile(tb, content)
 
-	model := app.NewModel(fileinput.New(testFile), config.GetDefaultConfig())
+	model := app.NewModel(fileinput.New(testFile), config.GetDefaultConfig(), testVersion)
 	model = handleUpdate(model, model.Init()())
 
 	return model

internal/app/stateinitial_test.go

@@ -22,6 +22,7 @@ func TestStateInitial(t *testing.T) {
 	model := app.NewModel(
 		readerinput.New(bytes.NewReader([]byte{}), time.Millisecond),
 		config.GetDefaultConfig(),
+		testVersion,
 	)
 
 	_, ok := model.(app.StateInitialModel)

internal/app/stateloaded.go

@@ -67,7 +67,7 @@ func (s StateLoadedModel) viewTable() string {
 }
 
 func (s StateLoadedModel) viewHelp() string {
-	return "\n" + s.help.View(s.keys)
+	return "\n" + s.Version + " " + s.help.View(s.keys)
 }
 
 // Update handles events. It implements tea.Model.

internal/app/stateloaded_test.go

@@ -57,6 +57,12 @@ func TestStateLoaded(t *testing.T) {
 		_, ok = model.(app.StateErrorModel)
 		assert.Truef(t, ok, "%s", model)
 	})
+
+	t.Run("version_printed", func(t *testing.T) {
+		t.Parallel()
+
+		assert.Contains(t, model.View(), testVersion)
+	})
 }
 
 func TestStateLoadedQuit(t *testing.T) {