feat: handle symlink copying (#39)

fileutils/copy.go

@@ -3,12 +3,14 @@ package fileutils
 import (
 	"os"
 	"path"
+	"path/filepath"
+	"strings"
 
 	"github.com/spf13/afero"
 )
 
 // Copy copies a file or folder from one place to another.
-func Copy(fs afero.Fs, src, dst string) error {
+func Copy(fs afero.Fs, src, dst, scope string) error {
 	if src = path.Clean("/" + src); src == "" {
 		return os.ErrNotExist
 	}
@@ -31,9 +33,34 @@ func Copy(fs afero.Fs, src, dst string) error {
 		return err
 	}
 
-	if info.IsDir() {
-		return CopyDir(fs, src, dst)
+	switch info.Mode() & os.ModeType {
+	case os.ModeDir:
+		return CopyDir(fs, src, dst, scope)
+	case os.ModeSymlink:
+		return CopySymLink(fs, src, dst, scope)
+	default:
+		return CopyFile(fs, src, dst)
 	}
+}
+
+func CopySymLink(fs afero.Fs, source, dest, scope string) error {
+	if reader, ok := fs.(afero.LinkReader); ok {
+		link, err := reader.ReadlinkIfPossible(source)
+		if err != nil {
+			return err
+		}
 
-	return CopyFile(fs, src, dst)
+		if filepath.IsAbs(link) {
+			link = strings.TrimPrefix(link, scope)
+			link = filepath.Join(string(os.PathSeparator), link)
+		} else {
+			link = filepath.Clean(filepath.Join(filepath.Dir(source), link))
+		}
+
+		if linker, ok := fs.(afero.Linker); ok {
+			return linker.SymlinkIfPossible(link, dest)
+		}
+		return nil
+	}
+	return nil
 }

fileutils/dir.go

@@ -2,6 +2,7 @@ package fileutils
 
 import (
 	"errors"
+	"os"
 	"path/filepath"
 
 	"github.com/spf13/afero"
@@ -10,7 +11,7 @@ import (
 // CopyDir copies a directory from source to dest and all
 // of its sub-directories. It doesn't stop if it finds an error
 // during the copy. Returns an error if any.
-func CopyDir(fs afero.Fs, source, dest string) error {
+func CopyDir(fs afero.Fs, source, dest, scope string) error {
 	// Get properties of source.
 	srcinfo, err := fs.Stat(source)
 	if err != nil {
@@ -35,16 +36,19 @@ func CopyDir(fs afero.Fs, source, dest string) error {
 		fsource := source + "/" + obj.Name()
 		fdest := dest + "/" + obj.Name()
 
-		if obj.IsDir() {
+		switch obj.Mode() & os.ModeType {
+		case os.ModeDir:
 			// Create sub-directories, recursively.
-			err = CopyDir(fs, fsource, fdest)
-			if err != nil {
+			if err := CopyDir(fs, fsource, fdest, scope); err != nil {
 				errs = append(errs, err)
 			}
-		} else {
+		case os.ModeSymlink:
+			if err := CopySymLink(fs, fsource, fdest, scope); err != nil {
+				return err
+			}
+		default:
 			// Perform the file copy.
-			err = CopyFile(fs, fsource, fdest)
-			if err != nil {
+			if err := CopyFile(fs, fsource, fdest); err != nil {
 				errs = append(errs, err)
 			}
 		}

frontend/package.json

@@ -10,7 +10,7 @@
     "watch": "find ./dist -maxdepth 1 -mindepth 1 ! -name '.gitignore' -exec rm -r {} + && vue-cli-service build --watch --no-clean"
   },
   "dependencies": {
-    "ace-builds": "^1.4.7",
+    "ace-builds": "^1.5.1",
     "clipboard": "^2.0.4",
     "core-js": "^3.9.1",
     "css-vars-ponyfill": "^2.4.3",

http/resource.go

@@ -438,7 +438,7 @@ func patchAction(ctx context.Context, action, src, dst string, d *data, fileCach
 			return errors.ErrPermissionDenied
 		}
 
-		return fileutils.Copy(d.user.Fs, src, dst)
+		return fileutils.Copy(d.user.Fs, src, dst, d.server.Root)
 	case "rename":
 		if !d.user.Perm.Rename {
 			return errors.ErrPermissionDenied