Convert octal notation file names in Git

internal/git/commands.go

@@ -6,6 +6,7 @@ import (
 	"context"
 	"fmt"
 	"io"
+	"net/url"
 	"os"
 	"os/exec"
 	"path"
@@ -115,6 +116,9 @@ func GetFilesOfRepository(user string, gist string, revision string) ([]string,
 	}
 
 	slice := strings.Split(string(stdout), "\n")
+	for i, s := range slice {
+		slice[i] = convertOctalToUTF8(s)
+	}
 	return slice[:len(slice)-1], nil
 }
 
@@ -153,7 +157,7 @@ func CatFileBatch(user string, gist string, revision string, truncate bool) ([]*
 		fileMap = append(fileMap, &catFileBatch{
 			Hash: hash,
 			Size: size,
-			Name: name,
+			Name: convertOctalToUTF8(name),
 		})
 	}
 
@@ -249,7 +253,7 @@ func GetFileContent(user string, gist string, revision string, filename string,
 		"git",
 		"--no-pager",
 		"show",
-		revision+":"+filename,
+		revision+":"+convertURLToOctal(filename),
 	)
 	cmd.Dir = repositoryPath
 
@@ -273,7 +277,7 @@ func GetFileSize(user string, gist string, revision string, filename string) (ui
 		"git",
 		"cat-file",
 		"-s",
-		revision+":"+filename,
+		revision+":"+convertURLToOctal(filename),
 	)
 	cmd.Dir = repositoryPath
 
@@ -565,6 +569,48 @@ func removeFilesExceptGit(dir string) error {
 	})
 }
 
+func convertOctalToUTF8(name string) string {
+	name = strings.Trim(name, `"`)
+	utf8Name, err := strconv.Unquote(name)
+	if err != nil {
+		utf8Name, err = strconv.Unquote(`"` + name + `"`)
+		if err != nil {
+			return name
+		}
+	}
+	return utf8Name
+}
+
+func convertUTF8ToOctal(name string) string {
+	if strings.Contains(name, "\\") {
+		return name
+	}
+
+	needsQuoting := false
+	for _, r := range name {
+		if r > 127 {
+			needsQuoting = true
+			break
+		}
+	}
+
+	if !needsQuoting {
+		return name
+	}
+
+	quoted := fmt.Sprintf("%q", name)
+	return strings.Trim(quoted, `"`)
+}
+
+func convertURLToOctal(name string) string {
+	decoded, err := url.QueryUnescape(name)
+	if err != nil {
+		return name
+	}
+
+	return convertUTF8ToOctal(decoded)
+}
+
 const hookTemplate = `#!/bin/sh
 "$OG_OPENGIST_HOME_INTERNAL/symlinks/opengist" --config=$OG_OPENGIST_HOME_INTERNAL/symlinks/config.yml hook %s
 `

internal/git/commands_test.go

@@ -61,11 +61,12 @@ func TestContent(t *testing.T) {
 		"my_other_file.txt": `I really
 hate Opengist`,
 		"rip.txt": "byebye",
+		"中文名.txt": "中文内容",
 	})
 
 	files, err := GetFilesOfRepository("thomas", "gist1", "HEAD")
 	require.NoError(t, err, "Could not get files of repository")
-	require.Subset(t, []string{"my_file.txt", "my_other_file.txt", "rip.txt"}, files, "Files are not correct")
+	require.Subset(t, []string{"my_file.txt", "my_other_file.txt", "rip.txt", "中文名.txt"}, files, "Files are not correct")
 
 	content, truncated, err := GetFileContent("thomas", "gist1", "HEAD", "my_file.txt", false)
 	require.NoError(t, err, "Could not get content")
@@ -77,16 +78,22 @@ hate Opengist`,
 	require.False(t, truncated, "Content should not be truncated")
 	require.Equal(t, "I really\nhate Opengist", content, "Content is not correct")
 
+	content, truncated, err = GetFileContent("thomas", "gist1", "HEAD", "中文名.txt", false)
+	require.NoError(t, err, "Could not get content")
+	require.False(t, truncated, "Content should not be truncated")
+	require.Equal(t, "中文内容", content, "Content is not correct")
+
 	CommitToBare(t, "thomas", "gist1", map[string]string{
 		"my_renamed_file.txt": "I love Opengist\n",
 		"my_other_file.txt": `I really
 like Opengist actually`,
 		"new_file.txt": "Wait now there is a new file",
+		"中文名.txt":      "中文内容",
 	})
 
 	files, err = GetFilesOfRepository("thomas", "gist1", "HEAD")
 	require.NoError(t, err, "Could not get files of repository")
-	require.Subset(t, []string{"my_renamed_file.txt", "my_other_file.txt", "new_file.txt"}, files, "Files are not correct")
+	require.Subset(t, []string{"my_renamed_file.txt", "my_other_file.txt", "new_file.txt", "中文名.txt"}, files, "Files are not correct")
 
 	content, truncated, err = GetFileContent("thomas", "gist1", "HEAD", "my_other_file.txt", false)
 	require.NoError(t, err, "Could not get content")

internal/git/output_parser.go

@@ -193,28 +193,28 @@ loopLog:
 					case strings.HasPrefix(line, "dissimilarity index"):
 						continue
 					case strings.HasPrefix(line, "rename from "):
-						currentFile.OldFilename = line[12 : len(line)-1]
+						currentFile.OldFilename = convertOctalToUTF8(line[12 : len(line)-1])
 					case strings.HasPrefix(line, "rename to "):
-						currentFile.Filename = line[10 : len(line)-1]
+						currentFile.Filename = convertOctalToUTF8(line[10 : len(line)-1])
 						parseRename = false
 					case strings.HasPrefix(line, "copy from "):
-						currentFile.OldFilename = line[10 : len(line)-1]
+						currentFile.OldFilename = convertOctalToUTF8(line[10 : len(line)-1])
 					case strings.HasPrefix(line, "copy to "):
-						currentFile.Filename = line[8 : len(line)-1]
+						currentFile.Filename = convertOctalToUTF8(line[8 : len(line)-1])
 						parseRename = false
 					case strings.HasPrefix(line, "new file"):
 						currentFile.IsCreated = true
 					case strings.HasPrefix(line, "deleted file"):
 						currentFile.IsDeleted = true
 					case strings.HasPrefix(line, "--- "):
-						name := line[4 : len(line)-1]
+						name := convertOctalToUTF8(line[4 : len(line)-1])
 						if parseRename && currentFile.IsDeleted {
 							currentFile.Filename = name[2:]
 						} else if parseRename && strings.HasPrefix(name, "a/") {
 							currentFile.OldFilename = name[2:]
 						}
 					case strings.HasPrefix(line, "+++ "):
-						name := line[4 : len(line)-1]
+						name := convertOctalToUTF8(line[4 : len(line)-1])
 						if parseRename && strings.HasPrefix(name, "b/") {
 							currentFile.Filename = name[2:]
 						}