feat: initial Windows OS support

.gitignore

@@ -1,3 +1,4 @@
 resticui
 resticui-*
 dist
+resticui.exe

README.md

@@ -12,6 +12,12 @@ The goals of this project are:
  * Easy to pull back the curtain: all common operations should be possible from the UI, but it should be easy to drop down to the command line and use restic directly if needed.
  * Lightweight: your backup orchestration should blend into the background. The web UI binary is fully self contained as a single executable and the binary is <20 MB with very light memory overhead at runtime.
 
+OS Support
+
+ * Linux 
+ * MacOS (Darwin)
+ * Windows (note: must be run as administrator on first execution to install the restic binary in Program Files).
+
 # Getting Started 
 
 ## Running 

go.mod

@@ -5,11 +5,11 @@ go 1.21.3
 require (
 	github.com/GeertJohan/go.rice v1.0.3
 	github.com/gitploy-io/cronexpr v0.2.2
-	github.com/google/renameio v1.0.1
 	github.com/grpc-ecosystem/go-grpc-middleware/v2 v2.0.1
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.18.1
 	github.com/hashicorp/go-multierror v1.1.1
 	github.com/mattn/go-colorable v0.1.13
+	github.com/natefinch/atomic v1.0.1
 	go.etcd.io/bbolt v1.3.8
 	go.uber.org/zap v1.26.0
 	google.golang.org/genproto/googleapis/api v0.0.0-20231127180814-3a041ad873d4
@@ -20,6 +20,7 @@ require (
 require (
 	github.com/daaku/go.zipexe v1.0.2 // indirect
 	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/google/renameio v1.0.1 // indirect
 	github.com/hashicorp/errwrap v1.1.0 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	go.uber.org/multierr v1.11.0 // indirect

go.sum

@@ -31,6 +31,8 @@ github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovk
 github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/natefinch/atomic v1.0.1 h1:ZPYKxkqQOx3KZ+RsbnP/YsgvxWQPGxjC0oBt2AhwV0A=
+github.com/natefinch/atomic v1.0.1/go.mod h1:N/D/ELrljoqDyT3rZrsUmtsuzvHkeB/wWjHV22AZRbM=
 github.com/nkovacs/streamquote v1.0.0/go.mod h1:BN+NaZ2CmdKqUuTUXUEm9j95B2TRbpOWpxbJYzzgUsc=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=

internal/config/environment.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"os"
 	"path"
+	"runtime"
 	"strings"
 )
 
@@ -14,23 +15,31 @@ var (
 	EnvVarBinPath     = "RESTICUI_RESTIC_BIN_PATH"
 )
 
+// ConfigFilePath
+// - *nix systems use $XDG_CONFIG_HOME/resticui/config.json
+// - windows uses %APPDATA%/resticui/config.json
 func ConfigFilePath() string {
 	if val := os.Getenv(EnvVarConfigPath); val != "" {
 		return val
 	}
-	if val := os.Getenv("XDG_CONFIG_HOME"); val != "" {
-		return path.Join(val, "resticui/config.json")
-	}
-	return path.Join(getHomeDir(), ".config/resticui/config.json")
+
+	return path.Join(getConfigDir(), "resticui/config.json")
 }
 
+// DataDir
+// - *nix systems use $XDG_DATA_HOME/resticui
+// - windows uses %APPDATA%/resticui/data
 func DataDir() string {
 	if val := os.Getenv(EnvVarDataDir); val != "" {
 		return val
 	}
 	if val := os.Getenv("XDG_DATA_HOME"); val != "" {
 		return path.Join(val, "resticui")
 	}
+
+	if runtime.GOOS == "windows" {
+		return path.Join(getConfigDir(), "resticui/data")
+	}
 	return path.Join(getHomeDir(), ".local/share/resticui")
 }
 
@@ -58,3 +67,11 @@ func getHomeDir() string {
 	}
 	return home
 }
+
+func getConfigDir() string {
+	cfgDir, err := os.UserConfigDir()
+	if err != nil {
+		panic(fmt.Errorf("couldn't determine config directory: %v", err))
+	}
+	return cfgDir
+}

internal/config/jsonstore.go

@@ -1,20 +1,21 @@
 package config
 
 import (
+	"bytes"
 	"errors"
 	"fmt"
 	"os"
 	"path/filepath"
 	"sync"
 
 	v1 "github.com/garethgeorge/resticui/gen/go/v1"
-	"github.com/google/renameio"
+	"github.com/natefinch/atomic"
 	"google.golang.org/protobuf/encoding/protojson"
 )
 
 type JsonFileStore struct {
 	Path string
-	mu sync.Mutex
+	mu   sync.Mutex
 }
 
 var _ ConfigStore = &JsonFileStore{}
@@ -32,7 +33,7 @@ func (f *JsonFileStore) Get() (*v1.Config, error) {
 	}
 
 	var config v1.Config
-	
+
 	if err = protojson.Unmarshal(data, &config); err != nil {
 		return nil, fmt.Errorf("failed to unmarshal config: %w", err)
 	}
@@ -53,8 +54,8 @@ func (f *JsonFileStore) Update(config *v1.Config) error {
 	}
 
 	data, err := protojson.MarshalOptions{
-		Indent: "  ",
-		Multiline: true,
+		Indent:          "  ",
+		Multiline:       true,
 		EmitUnpopulated: true,
 	}.Marshal(config)
 	if err != nil {
@@ -66,7 +67,7 @@ func (f *JsonFileStore) Update(config *v1.Config) error {
 		return fmt.Errorf("failed to create config directory: %w", err)
 	}
 
-	err = renameio.WriteFile(f.Path, data, 0644)
+	err = atomic.WriteFile(f.Path, bytes.NewReader(data))
 	if err != nil {
 		return fmt.Errorf("failed to write config file: %w", err)
 	}

internal/resticinstaller/flock.go

@@ -1,3 +1,6 @@
+//go:build linux || darwin
+// +build linux darwin
+
 package resticinstaller
 
 import (

internal/resticinstaller/flockwindows.go

@@ -0,0 +1,9 @@
+//go:build windows
+// +build windows
+
+package resticinstaller
+
+func withFlock(lock string, do func() error) error {
+	// TODO: windows file locking. Not a major issue as locking is only needed for test runs.
+	return do()
+}

internal/resticinstaller/resticinstaller.go

@@ -1,6 +1,8 @@
 package resticinstaller
 
 import (
+	"archive/zip"
+	"bytes"
 	"compress/bzip2"
 	"errors"
 	"fmt"
@@ -28,10 +30,13 @@ var (
 )
 
 func resticDownloadURL(version string) string {
+	if runtime.GOOS == "windows" {
+		return fmt.Sprintf("https://github.com/restic/restic/releases/download/v%v/restic_%v_windows_%v.zip", version, version, runtime.GOARCH)
+	}
 	return fmt.Sprintf("https://github.com/restic/restic/releases/download/v%v/restic_%v_%v_%v.bz2", version, version, runtime.GOOS, runtime.GOARCH)
 }
 
-func downloadFile(url string, path string) error {
+func downloadFile(url string, downloadPath string) error {
 	// Download ur as a file and save it to path
 	resp, err := http.Get(url)
 	if err != nil {
@@ -42,19 +47,38 @@ func downloadFile(url string, path string) error {
 	var body io.Reader = resp.Body
 	if strings.HasSuffix(url, ".bz2") {
 		body = bzip2.NewReader(resp.Body)
+	} else if strings.HasSuffix(url, ".zip") {
+		var fullBody bytes.Buffer
+		_, err := io.Copy(&fullBody, resp.Body)
+		if err != nil {
+			return fmt.Errorf("copy response body to buffer: %w", err)
+		}
+
+		archive, err := zip.NewReader(bytes.NewReader(fullBody.Bytes()), int64(fullBody.Len()))
+		if err != nil {
+			return fmt.Errorf("open zip archive: %w", err)
+		}
+
+		if len(archive.File) != 1 {
+			return fmt.Errorf("expected zip archive to contain exactly one file, got %v", len(archive.File))
+		}
+		body, err = archive.File[0].Open()
+		if err != nil {
+			return fmt.Errorf("open zip archive file %v: %w", archive.File[0].Name, err)
+		}
 	}
 
-	out, err := os.Create(path)
+	out, err := os.Create(downloadPath)
 	if err != nil {
-		return fmt.Errorf("create file %v: %w", path, err)
+		return fmt.Errorf("create file %v: %w", downloadPath, err)
 	}
 	defer out.Close()
 	if err != nil {
-		return fmt.Errorf("create file %v: %w", path, err)
+		return fmt.Errorf("create file %v: %w", downloadPath, err)
 	}
 	_, err = io.Copy(out, body)
 	if err != nil {
-		return fmt.Errorf("copy response body to file %v: %w", path, err)
+		return fmt.Errorf("copy response body to file %v: %w", downloadPath, err)
 	}
 
 	return nil
@@ -115,6 +139,13 @@ func FindOrInstallResticBinary() (string, error) {
 
 	// Check for restic installation in data directory.
 	resticInstallPath := path.Join(config.DataDir(), fmt.Sprintf("restic-%v", RequiredResticVersion))
+	if runtime.GOOS == "windows" {
+		programFiles := os.Getenv("programfiles(x86)")
+		if programFiles == "" {
+			programFiles = os.Getenv("programfiles")
+		}
+		resticInstallPath = path.Join(programFiles, "restic", fmt.Sprintf("restic-%v.exe", RequiredResticVersion))
+	}
 	if _, err := os.Stat(resticInstallPath); err != nil {
 		if !errors.Is(err, os.ErrNotExist) {
 			return "", fmt.Errorf("could not stat restic binary at %v: %w", resticBin, err)
@@ -125,7 +156,7 @@ func FindOrInstallResticBinary() (string, error) {
 		}
 		didTryInstall = true
 
-		zap.S().Infof("Installing restic %v...", RequiredResticVersion)
+		zap.S().Infof("Installing restic %v to %v...", resticInstallPath, RequiredResticVersion)
 		if err := installResticIfNotExists(resticInstallPath); err != nil {
 			return "", fmt.Errorf("install restic: %w", err)
 		}

pkg/restic/restic.go

@@ -467,7 +467,12 @@ func WithEnv(env ...string) GenericOption {
 	}
 }
 
-var EnvToPropagate = []string{"PATH", "HOME", "XDG_CACHE_HOME", "XDG_CONFIG_HOME", "XDG_DATA_HOME"}
+var EnvToPropagate = []string{
+	// *nix systems
+	"PATH", "HOME", "XDG_CACHE_HOME", "XDG_CONFIG_HOME", "XDG_DATA_HOME",
+	// windows
+	"APPDATA", "LOCALAPPDATA",
+}
 
 func WithPropagatedEnvVars(extras ...string) GenericOption {
 	var extension []string

webui/package.json

@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "description": "",
   "scripts": {
-    "start": "RESTICUI_BUILD_VERSION=$(git describe --tags --abbrev=0) parcel serve src/index.html",
+    "start": "parcel serve src/index.html",
     "build": "RESTICUI_BUILD_VERSION=$(git describe --tags --abbrev=0) parcel build src/index.html",
     "test": "echo \"Error: no test specified\" && exit 1"
   },