added proton drive integration

cmd/root.go

@@ -8,6 +8,7 @@ import (
 	"github.com/spf13/cobra"
 
 	"dirmd/internal/config"
+	"dirmd/internal/drive"
 	"dirmd/internal/renderer"
 	"dirmd/internal/walker"
 )
@@ -30,7 +31,13 @@ Examples:
   dirmd -a -i README.md -o existing.md
 
   # Append another directory
-  dirmd -a -o existing.md ~/repos/anotherproject`,
+  dirmd -a -o existing.md ~/repos/anotherproject
+
+  # Generate and upload to Proton Drive (default remote path /my-files/md/<filename>)
+  dirmd -o output.md ~/repos/myproject --proton-drive
+
+  # Generate and upload to a specific remote path
+  dirmd -o output.md ~/repos/myproject --proton-drive --drive-path /my-files/docs/api.md`,
 		RunE: run,
 	}
 
@@ -41,6 +48,8 @@ Examples:
 	maxDepth       int
 	ignorePatterns []string
 	extensions     []string
+	protonDrive    bool
+	drivePath      string
 )
 
 func Execute() {
@@ -57,11 +66,17 @@ func init() {
 	rootCmd.Flags().IntVar(&maxDepth, "max-depth", config.DefaultMaxDepth, "max directory recursion depth")
 	rootCmd.Flags().StringArrayVar(&ignorePatterns, "ignore", nil, "additional ignore patterns (glob)")
 	rootCmd.Flags().StringArrayVar(&extensions, "extensions", nil, "additional file extensions to skip (repeatable)")
+	rootCmd.Flags().BoolVar(&protonDrive, "proton-drive", false, "upload output to Proton Drive after writing locally")
+	rootCmd.Flags().StringVar(&drivePath, "drive-path", "", "full remote path on Proton Drive (e.g. /my-files/md/report.md). Requires --proton-drive")
 
 	rootCmd.MarkPersistentFlagRequired("output")
 }
 
 func run(cmd *cobra.Command, args []string) error {
+	if drivePath != "" && !protonDrive {
+		return fmt.Errorf("--drive-path requires --proton-drive")
+	}
+
 	cfg := &config.Config{
 		OutputPath:  outputPath,
 		AppendMode:  appendMode,
@@ -69,6 +84,8 @@ func run(cmd *cobra.Command, args []string) error {
 		MaxDepth:    maxDepth,
 		Ignores:     append(config.DefaultIgnores, ignorePatterns...),
 		Extensions:  append(config.DefaultExts, extensions...),
+		ProtonDrive: protonDrive,
+		DrivePath:   drivePath,
 	}
 
 	if singleFile != "" {
@@ -111,6 +128,27 @@ func run(cmd *cobra.Command, args []string) error {
 	}
 
 	fmt.Fprintf(os.Stderr, "wrote %d entries to %s\n", len(result.Entries), outputPath)
+
+	if protonDrive {
+		remotePath := drivePath
+		if remotePath == "" {
+			remotePath = "/my-files/md/" + filepath.Base(outputPath)
+		}
+
+		if err := drive.CheckAuth(); err != nil {
+			fmt.Fprintf(os.Stderr, "error: %v\n", err)
+			fmt.Fprintln(os.Stderr, "local file was written successfully, but upload was skipped")
+			return err
+		}
+
+		if err := drive.Upload(outputPath, remotePath); err != nil {
+			fmt.Fprintf(os.Stderr, "error: %v\n", err)
+			fmt.Fprintln(os.Stderr, "local file was written successfully, but upload failed")
+			return err
+		}
+
+		fmt.Fprintf(os.Stderr, "uploaded %s to %s on Proton Drive\n", outputPath, remotePath)
+	}
+
 	return nil
 }
-

internal/config/config.go

@@ -62,6 +62,8 @@ type Config struct {
 	Ignores     []string
 	Extensions  []string
 	AbsRoot     string
+	ProtonDrive bool
+	DrivePath   string
 }
 
 func PrintUsage() {
@@ -82,6 +84,8 @@ func Parse() (*Config, error) {
 		ignores     stringSlice
 		exts        stringSlice
 		showVer     bool
+		protonDrive bool
+		drivePath   string
 	)
 
 	flag.StringVar(&input, "i", "", "single file input (append mode only)")
@@ -92,6 +96,8 @@ func Parse() (*Config, error) {
 	flag.Var(&ignores, "ignore", "additional ignore patterns (glob, repeatable)")
 	flag.Var(&exts, "extensions", "additional file extensions to skip (repeatable)")
 	flag.BoolVar(&showVer, "version", false, "print version and exit")
+	flag.BoolVar(&protonDrive, "proton-drive", false, "upload output to Proton Drive after writing locally")
+	flag.StringVar(&drivePath, "drive-path", "", "full remote path on Proton Drive (requires --proton-drive)")
 
 	flag.Usage = PrintUsage
 	flag.Parse()
@@ -105,6 +111,10 @@ func Parse() (*Config, error) {
 		return nil, fmt.Errorf("-o is required")
 	}
 
+	if drivePath != "" && !protonDrive {
+		return nil, fmt.Errorf("--drive-path requires --proton-drive")
+	}
+
 	cfg := &Config{
 		OutputPath:  output,
 		AppendMode:  appendMd,
@@ -112,6 +122,8 @@ func Parse() (*Config, error) {
 		MaxDepth:    maxDepth,
 		Ignores:     append(DefaultIgnores, ignores...),
 		Extensions:  append(DefaultExts, exts...),
+		ProtonDrive: protonDrive,
+		DrivePath:   drivePath,
 	}
 
 	if input != "" {

internal/drive/drive.go

@@ -0,0 +1,88 @@
+package drive
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+)
+
+const binaryName = "proton-drive"
+
+// Lookup returns the full path to the proton-drive binary in PATH.
+func Lookup() (string, error) {
+	return exec.LookPath(binaryName)
+}
+
+// CheckAuth verifies that the user is authenticated by listing /my-files.
+func CheckAuth() error {
+	binary, err := Lookup()
+	if err != nil {
+		return fmt.Errorf("proton-drive not found in PATH: %w", err)
+	}
+
+	cmd := exec.Command(binary, "filesystem", "list", "/my-files")
+	cmd.Stdout = nil
+	cmd.Stderr = nil
+
+	if err := cmd.Run(); err != nil {
+		return fmt.Errorf("not authenticated with proton-drive (run 'proton-drive auth login'): %w", err)
+	}
+	return nil
+}
+
+// Upload uploads localPath to remotePath on Proton Drive.
+// remotePath is a full path including filename (e.g. /my-files/md/report.md).
+// The CLI uploads to a parent directory and preserves the local filename,
+// so if the remote filename differs from the local one, a temp copy is staged.
+// Existing remote files are overwritten (--conflict-strategy replace).
+func Upload(localPath, remotePath string) error {
+	binary, err := Lookup()
+	if err != nil {
+		return fmt.Errorf("proton-drive not found in PATH: %w", err)
+	}
+
+	remoteDir := filepath.Dir(remotePath)
+	remoteName := filepath.Base(remotePath)
+	localName := filepath.Base(localPath)
+
+	if remoteName == localName {
+		return runUpload(binary, localPath, remoteDir)
+	}
+
+	tmpDir, err := os.MkdirTemp("", "dirmd-upload-*")
+	if err != nil {
+		return fmt.Errorf("cannot create temp dir: %w", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	tmpFile := filepath.Join(tmpDir, remoteName)
+	if err := copyFile(localPath, tmpFile); err != nil {
+		return fmt.Errorf("cannot stage temp file: %w", err)
+	}
+
+	return runUpload(binary, tmpFile, remoteDir)
+}
+
+func runUpload(binary, localPath, remoteDir string) error {
+	cmd := exec.Command(binary, "filesystem", "upload", localPath, remoteDir,
+		"--conflict-strategy", "replace")
+
+	var stderr strings.Builder
+	cmd.Stderr = &stderr
+
+	if err := cmd.Run(); err != nil {
+		return fmt.Errorf("upload to proton-drive failed: %w: %s",
+			err, strings.TrimSpace(stderr.String()))
+	}
+	return nil
+}
+
+func copyFile(src, dst string) error {
+	data, err := os.ReadFile(src)
+	if err != nil {
+		return err
+	}
+	return os.WriteFile(dst, data, 0644)
+}