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|
package main
import (
"flag"
"fmt"
"io"
"net/url"
"os"
"path/filepath"
"strings"
"time"
)
func cp(srcRoot string, dstRoot string) (err error) {
defer func() {
if err != nil {
os.RemoveAll(dstRoot)
}
}()
type roDir struct {
path string
mode os.FileMode
}
var roDirs []roDir
srcRoot = filepath.Clean(srcRoot)
if err := filepath.WalkDir(srcRoot, func(src string, d os.DirEntry, err error) error {
if err != nil {
return err
}
dst := filepath.Join(dstRoot, strings.TrimPrefix(src, srcRoot))
switch d.Type() {
case 0: // regular file
srcF, err := os.Open(src)
if err != nil {
return err
}
defer srcF.Close()
stat, err := srcF.Stat()
if err != nil {
return err
}
dstF, err := os.OpenFile(dst, os.O_WRONLY|os.O_CREATE|os.O_EXCL, stat.Mode().Perm())
if err != nil {
return err
}
defer dstF.Close()
if _, err := io.Copy(dstF, srcF); err != nil {
return err
}
if err := dstF.Close(); err != nil {
return err
}
return nil
case os.ModeSymlink:
linkTarget, err := os.Readlink(src)
if err != nil {
return err
}
return os.Symlink(linkTarget, dst)
case os.ModeDir:
stat, err := d.Info()
if err != nil {
return err
}
perm := stat.Mode().Perm()
if perm&0300 != 0300 {
roDirs = append(roDirs, roDir{dst, perm})
// Make sure we can create directory contents.
perm |= 0300
}
return os.MkdirAll(dst, perm)
default:
return fmt.Errorf("unknown file type %s", d.Type())
}
}); err != nil {
return err
}
// Iterate backwards to process directory contents before the parent directory.
for i := len(roDirs) - 1; i >= 0; i-- {
dir := roDirs[i]
if err := os.Chmod(dir.path, dir.mode); err != nil {
return err
}
}
return nil
}
func mv(src, dst string) error {
if err := os.Rename(src, dst); err == nil {
return nil
}
if err := cp(src, dst); err != nil {
return err
}
return os.RemoveAll(src)
}
func trashFile(fileName, trash, now string) (err error) {
absPath, err := filepath.Abs(fileName)
if err != nil {
return fmt.Errorf("%s: find absolute path: %s", fileName, err)
}
info, err := os.CreateTemp(filepath.Join(trash, "info"), filepath.Base(fileName)+"."+now+".*.trashinfo")
if err != nil {
return fmt.Errorf("%s: create trashinfo: %s", fileName, err)
}
defer func() {
info.Close()
if err != nil {
os.Remove(info.Name())
}
}()
escapedPath := strings.Split(absPath, string(filepath.Separator))
for i, pathSegment := range escapedPath {
escapedPath[i] = url.QueryEscape(pathSegment)
}
_, err = fmt.Fprintf(info, `[Trash Info]
Path=%s
DeletionDate=%s
`,
filepath.Join(escapedPath...),
now)
if err != nil {
return fmt.Errorf("%s: write trashinfo: %s", fileName, err)
}
if err := info.Close(); err != nil {
return fmt.Errorf("%s: write trashinfo: %s", fileName, err)
}
if err := mv(fileName, filepath.Join(trash, "files", strings.TrimSuffix(filepath.Base(info.Name()), ".trashinfo"))); err != nil {
return fmt.Errorf("%s: %s", fileName, err)
}
return nil
}
func main() {
flag.Usage = func() {
fmt.Fprintln(os.Stderr, "Usage: trash [FILE]...")
flag.PrintDefaults()
}
flag.Parse()
if len(flag.Args()) == 0 {
fmt.Fprintln(os.Stderr, "trash: missing operand")
flag.Usage()
os.Exit(1)
}
trash := filepath.Join(os.Getenv("HOME"), ".local", "share", "Trash")
if xdgDataHome := os.Getenv("XDG_DATA_HOME"); xdgDataHome != "" {
trash = filepath.Join(xdgDataHome, "Trash")
}
if err := os.MkdirAll(filepath.Join(trash, "files"), 0755); err != nil {
fmt.Fprintln(os.Stderr, "trash:", err)
os.Exit(1)
}
if err := os.MkdirAll(filepath.Join(trash, "info"), 0755); err != nil {
fmt.Fprintln(os.Stderr, "trash:", err)
os.Exit(1)
}
now := time.Now().Format("2006-01-02T15:04:05")
success := true
for _, fileName := range flag.Args() {
if err := trashFile(fileName, trash, now); err != nil {
fmt.Fprintln(os.Stderr, "trash:", err)
success = false
}
}
if !success {
os.Exit(1)
}
}
|
