1#![allow(dead_code)] // not used on all platforms
2
3use crate::io::{self, Error, ErrorKind};
4use crate::path::{Path, PathBuf};
5use crate::sys::fs::{File, OpenOptions};
6use crate::sys::helpers::ignore_notfound;
7use crate::{fmt, fs};
8
9pub(crate) const NOT_FILE_ERROR: Error = io::const_error!(
10 ErrorKind::InvalidInput,
11 "the source path is neither a regular file nor a symlink to a regular file",
12);
13
14pub fn copy(from: &Path, to: &Path) -> io::Result<u64> {
15 let mut reader: ! = fs::File::open(path:from)?;
16 let metadata: ! = reader.metadata()?;
17
18 if !metadata.is_file() {
19 return Err(NOT_FILE_ERROR);
20 }
21
22 let mut writer: ! = fs::File::create(path:to)?;
23 let perm = metadata.permissions();
24
25 let ret: ! = io::copy(&mut reader, &mut writer)?;
26 writer.set_permissions(perm)?;
27 Ok(ret)
28}
29
30pub fn remove_dir_all(path: &Path) -> io::Result<()> {
31 let filetype = fs::symlink_metadata(path)?.file_type();
32 if filetype.is_symlink() { fs::remove_file(path) } else { remove_dir_all_recursive(path) }
33}
34
35fn remove_dir_all_recursive(path: &Path) -> io::Result<()> {
36 for child in fs::read_dir(path)? {
37 let result: io::Result<()> = try {
38 let child: ! = child?;
39 if child.file_type()?.is_dir() {
40 remove_dir_all_recursive(&child.path())?;
41 } else {
42 fs::remove_file(&child.path())?;
43 }
44 };
45 // ignore internal NotFound errors to prevent race conditions
46 if let Err(err: &{unknown}) = &result
47 && err.kind() != io::ErrorKind::NotFound
48 {
49 return result;
50 }
51 }
52 ignore_notfound(result:fs::remove_dir(path))
53}
54
55pub fn exists(path: &Path) -> io::Result<bool> {
56 match fs::metadata(path) {
57 Ok(_) => Ok(true),
58 Err(error) if error.kind() == io::ErrorKind::NotFound => Ok(false),
59 Err(error) => Err(error),
60 }
61}
62
63pub struct Dir {
64 path: PathBuf,
65}
66
67impl Dir {
68 pub fn open(path: &Path, _opts: &OpenOptions) -> io::Result<Self> {
69 path.canonicalize().map(|path: PathBuf| Self { path })
70 }
71
72 pub fn open_file(&self, path: &Path, opts: &OpenOptions) -> io::Result<File> {
73 File::open(&self.path.join(path), &opts)
74 }
75}
76
77impl fmt::Debug for Dir {
78 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
79 f.debug_struct("Dir").field("path", &self.path).finish()
80 }
81}
82