allow passing path to restic as argument

README.md

@@ -45,7 +45,8 @@ The UI is navigatable via keyboard shortcuts. To change the focus area, hit `Tab
 ## System Requirements
 
 #### All platforms
-- Install [restic](https://github.com/restic/restic/releases/) and *make sure it is included in your $PATH*.
+- Install [restic](https://github.com/restic/restic/releases/) and *make sure it is included in your $PATH* or 
+pass the path to the restic executable *as argument*: `Restic-Browser[.exe] --restic="PATH/TO/restic[.exe]"`.
 
 #### Windows:
 - Windows 10 or later with [WebView2 Runtime](https://developer.microsoft.com/de-de/microsoft-edge/webview2/#download-section)

app.go

@@ -27,8 +27,8 @@ type ResticBrowserApp struct {
 	snapshots   map[string]*restic.Snapshot
 }
 
-func NewResticBrowser() *ResticBrowserApp {
-	program, err := restic.NewRestic()
+func NewResticBrowser(resticPath *string) *ResticBrowserApp {
+	program, err := restic.NewRestic(resticPath)
 	if err != nil {
 		// continue without a valid restic instance
 		fmt.Print(err.Error() + "\n")
@@ -91,7 +91,7 @@ func (r *ResticBrowserApp) DomReady(ctx context.Context) {
 	// warn about missing restic program: this is the first time we can show a dialog
 	if r.restic == nil {
 		message := fmt.Sprintf(
-			"Failed to find a restic program in your $PATH: %s\n\n", r.resticError.Error()) +
+			"Failed to find restic program: %s\n\n", r.resticError.Error()) +
 			"Please select your installed restic binary manually in the following dialog."
 		r.showWarning("Restic Binary Missing", message)
 		selectFileOptions := runtime.OpenDialogOptions{

backend/restic/restic.go

@@ -76,13 +76,25 @@ func resticVersionNumber(resticProgram *program.Program) ([3]int, error) {
 }
 
 // NewRestic creates a new Restic struct
-func NewRestic() (restic *Restic, err error) {
-
-	// Find restic executable in PATH
-	programName := ResticProgramName()
-	resticProgram := program.Find(programName, "Restic")
-	if resticProgram == nil {
-		return nil, fmt.Errorf("unable to find '%s'", programName)
+func NewRestic(resticPath* string) (restic *Restic, err error) {
+	// Get restic from args or find restic executable in PATH
+	var resticProgram *program.Program;
+	if resticPath != nil && len(*resticPath) > 0 {
+		_, err := os.Stat(*resticPath)
+		if err != nil {
+			return nil, err
+		}
+		resticProgram = &program.Program{
+			Name:     "Restic",
+			Filename: filepath.Base(*resticPath),
+			Path:     *resticPath,
+		}
+	} else {
+		programName := ResticProgramName()
+		resticProgram = program.Find(programName, "Restic")
+		if resticProgram == nil {
+			return nil, fmt.Errorf("unable to find '%s' in $PATH", programName)
+		}
 	}
 
 	// Get the version

backend/restic/restic_test.go

@@ -52,7 +52,7 @@ func TestResticRepoPath(t *testing.T) {
 
 // test if restic program can be resolved and if it can be launched to query version info
 func TestResticProgram(t *testing.T) {
-	restic, err := NewRestic()
+	restic, err := NewRestic(nil)
 	if err != nil {
 		t.Fatal("failed to resolve restic binary", err)
 	}
@@ -66,7 +66,7 @@ func TestResticProgram(t *testing.T) {
 // test opening repo and fetching snapshots
 func TestResticSnapshots(t *testing.T) {
 	repoPath := getTestRepoPath()
-	restic, err := NewRestic()
+	restic, err := NewRestic(nil)
 	if err != nil {
 		t.Fatal("failed to resolve restic binary", err)
 	}
@@ -98,7 +98,7 @@ func TestResticSnapshots(t *testing.T) {
 // test opening repo and fetching files
 func TestResticFiles(t *testing.T) {
 	repoPath := getTestRepoPath()
-	restic, err := NewRestic()
+	restic, err := NewRestic(nil)
 	if err != nil {
 		t.Fatal("failed to resolve restic binary", err)
 	}
@@ -138,7 +138,7 @@ func TestResticFiles(t *testing.T) {
 
 func TestResticFileDump(t *testing.T) {
 	repoPath := getTestRepoPath()
-	restic, err := NewRestic()
+	restic, err := NewRestic(nil)
 	if err != nil {
 		t.Fatal("failed to resolve restic binary", err)
 	}

main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"embed"
+	"flag"
 
 	"github.com/wailsapp/wails/v2"
 	"github.com/wailsapp/wails/v2/pkg/options"
@@ -11,8 +12,12 @@ import (
 var assets embed.FS
 
 func main() {
+	// parse command line args
+	resticPath := flag.String("restic", "", "Optional path to the restic binary");
+	flag.Parse()
+
 	// Create an instance of the restic app
-	app := NewResticBrowser()
+	app := NewResticBrowser(resticPath)
 
 	// Create wails application with options and bind the app to the frontend
 	err := wails.Run(&options.App{