introduce gui adapter

pkg/app/app.go

@@ -24,6 +24,7 @@ import (
 	"github.com/jesseduffield/lazygit/pkg/gui"
 	"github.com/jesseduffield/lazygit/pkg/gui/types"
 	"github.com/jesseduffield/lazygit/pkg/i18n"
+	integrationTypes "github.com/jesseduffield/lazygit/pkg/integration/types"
 	"github.com/jesseduffield/lazygit/pkg/updates"
 )
 
@@ -38,7 +39,12 @@ type App struct {
 	Updater   *updates.Updater // may only need this on the Gui
 }
 
-func Run(config config.AppConfigurer, common *common.Common, startArgs types.StartArgs) {
+func Run(
+	config config.AppConfigurer,
+	common *common.Common,
+	startArgs types.StartArgs,
+	test integrationTypes.Test,
+) {
 	app, err := NewApp(config, common)
 
 	if err == nil {

pkg/app/run.go

@@ -0,0 +1,163 @@
+package app
+
+import (
+	"bytes"
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+
+	"github.com/jesseduffield/lazygit/pkg/app/daemon"
+	"github.com/jesseduffield/lazygit/pkg/config"
+	"github.com/jesseduffield/lazygit/pkg/env"
+	"github.com/jesseduffield/lazygit/pkg/gui/types"
+	"github.com/jesseduffield/lazygit/pkg/integration"
+	integrationTypes "github.com/jesseduffield/lazygit/pkg/integration/types"
+	"github.com/jesseduffield/lazygit/pkg/logs"
+	"gopkg.in/yaml.v3"
+)
+
+type CliArgs struct {
+	RepoPath           string
+	FilterPath         string
+	GitArg             string
+	PrintVersionInfo   bool
+	Debug              bool
+	TailLogs           bool
+	PrintDefaultConfig bool
+	PrintConfigDir     bool
+	UseConfigDir       string
+	WorkTree           string
+	GitDir             string
+	CustomConfigFile   string
+}
+
+type BuildInfo struct {
+	Commit      string
+	Date        string
+	Version     string
+	BuildSource string
+}
+
+// only used when running integration tests
+type TestConfig struct {
+	Test integrationTypes.Test
+}
+
+func Start(cliArgs *CliArgs, buildInfo *BuildInfo, test integrationTypes.Test) {
+	if cliArgs.RepoPath != "" {
+		if cliArgs.WorkTree != "" || cliArgs.GitDir != "" {
+			log.Fatal("--path option is incompatible with the --work-tree and --git-dir options")
+		}
+
+		absRepoPath, err := filepath.Abs(cliArgs.RepoPath)
+		if err != nil {
+			log.Fatal(err)
+		}
+		cliArgs.WorkTree = absRepoPath
+		cliArgs.GitDir = filepath.Join(absRepoPath, ".git")
+	}
+
+	if cliArgs.CustomConfigFile != "" {
+		os.Setenv("LG_CONFIG_FILE", cliArgs.CustomConfigFile)
+	}
+
+	if cliArgs.UseConfigDir != "" {
+		os.Setenv("CONFIG_DIR", cliArgs.UseConfigDir)
+	}
+
+	if cliArgs.WorkTree != "" {
+		env.SetGitWorkTreeEnv(cliArgs.WorkTree)
+	}
+
+	if cliArgs.GitDir != "" {
+		env.SetGitDirEnv(cliArgs.GitDir)
+	}
+
+	if cliArgs.PrintVersionInfo {
+		fmt.Printf("commit=%s, build date=%s, build source=%s, version=%s, os=%s, arch=%s\n", buildInfo.Commit, buildInfo.Date, buildInfo.BuildSource, buildInfo.Version, runtime.GOOS, runtime.GOARCH)
+		os.Exit(0)
+	}
+
+	if cliArgs.PrintDefaultConfig {
+		var buf bytes.Buffer
+		encoder := yaml.NewEncoder(&buf)
+		err := encoder.Encode(config.GetDefaultConfig())
+		if err != nil {
+			log.Fatal(err.Error())
+		}
+		fmt.Printf("%s\n", buf.String())
+		os.Exit(0)
+	}
+
+	if cliArgs.PrintConfigDir {
+		fmt.Printf("%s\n", config.ConfigDir())
+		os.Exit(0)
+	}
+
+	if cliArgs.TailLogs {
+		logs.TailLogs()
+		os.Exit(0)
+	}
+
+	if cliArgs.WorkTree != "" {
+		if err := os.Chdir(cliArgs.WorkTree); err != nil {
+			log.Fatal(err.Error())
+		}
+	}
+
+	tempDir, err := os.MkdirTemp("", "lazygit-*")
+	if err != nil {
+		log.Fatal(err.Error())
+	}
+	defer os.RemoveAll(tempDir)
+
+	appConfig, err := config.NewAppConfig("lazygit", buildInfo.Version, buildInfo.Commit, buildInfo.Date, buildInfo.BuildSource, cliArgs.Debug, tempDir)
+	if err != nil {
+		log.Fatal(err.Error())
+	}
+
+	if test, ok := integration.CurrentIntegrationTest(); ok {
+		test.SetupConfig(appConfig)
+	}
+
+	common, err := NewCommon(appConfig)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	if daemon.InDaemonMode() {
+		daemon.Handle(common)
+		return
+	}
+
+	parsedGitArg := parseGitArg(cliArgs.GitArg)
+
+	Run(appConfig, common, types.NewStartArgs(cliArgs.FilterPath, parsedGitArg), test)
+}
+
+func parseGitArg(gitArg string) types.GitArg {
+	typedArg := types.GitArg(gitArg)
+
+	// using switch so that linter catches when a new git arg value is defined but not handled here
+	switch typedArg {
+	case types.GitArgNone, types.GitArgStatus, types.GitArgBranch, types.GitArgLog, types.GitArgStash:
+		return typedArg
+	}
+
+	permittedValues := []string{
+		string(types.GitArgStatus),
+		string(types.GitArgBranch),
+		string(types.GitArgLog),
+		string(types.GitArgStash),
+	}
+
+	log.Fatalf("Invalid git arg value: '%s'. Must be one of the following values: %s. e.g. 'lazygit status'. See 'lazygit --help'.",
+		gitArg,
+		strings.Join(permittedValues, ", "),
+	)
+
+	panic("unreachable")
+}