Mercurial > hg
annotate rust/hg-core/src/utils/files.rs @ 44265:c18dd48cea4a
rust-pathauditor: add Rust implementation of the `pathauditor`
It does not offer the same flexibility as the Python implementation, but
should check incoming paths just as well.
Differential Revision: https://phab.mercurial-scm.org/D7866
author | Raphaël Gomès <rgomes@octobus.net> |
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date | Wed, 05 Feb 2020 17:05:37 +0100 |
parents | cf065c6a0197 |
children | 0e9ac3968b56 |
rev | line source |
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1 // files.rs |
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2 // |
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3 // Copyright 2019 |
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4 // Raphaël Gomès <rgomes@octobus.net>, |
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5 // Yuya Nishihara <yuya@tcha.org> |
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6 // |
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7 // This software may be used and distributed according to the terms of the |
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8 // GNU General Public License version 2 or any later version. |
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9 |
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10 //! Functions for fiddling with files. |
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11 |
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12 use crate::utils::hg_path::{HgPath, HgPathBuf}; |
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13 use std::iter::FusedIterator; |
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14 |
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15 use crate::utils::replace_slice; |
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16 use lazy_static::lazy_static; |
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17 use std::fs::Metadata; |
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18 use std::path::Path; |
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19 |
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20 pub fn get_path_from_bytes(bytes: &[u8]) -> &Path { |
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21 let os_str; |
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22 #[cfg(unix)] |
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23 { |
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24 use std::os::unix::ffi::OsStrExt; |
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25 os_str = std::ffi::OsStr::from_bytes(bytes); |
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26 } |
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27 // TODO Handle other platforms |
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28 // TODO: convert from WTF8 to Windows MBCS (ANSI encoding). |
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29 // Perhaps, the return type would have to be Result<PathBuf>. |
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30 |
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31 Path::new(os_str) |
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32 } |
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33 |
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34 // TODO: need to convert from WTF8 to MBCS bytes on Windows. |
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35 // that's why Vec<u8> is returned. |
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36 #[cfg(unix)] |
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37 pub fn get_bytes_from_path(path: impl AsRef<Path>) -> Vec<u8> { |
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38 use std::os::unix::ffi::OsStrExt; |
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39 path.as_ref().as_os_str().as_bytes().to_vec() |
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40 } |
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41 |
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42 /// An iterator over repository path yielding itself and its ancestors. |
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43 #[derive(Copy, Clone, Debug)] |
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44 pub struct Ancestors<'a> { |
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45 next: Option<&'a HgPath>, |
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46 } |
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47 |
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48 impl<'a> Iterator for Ancestors<'a> { |
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49 type Item = &'a HgPath; |
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50 |
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51 fn next(&mut self) -> Option<Self::Item> { |
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52 let next = self.next; |
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53 self.next = match self.next { |
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54 Some(s) if s.is_empty() => None, |
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55 Some(s) => { |
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56 let p = s.bytes().rposition(|c| *c == b'/').unwrap_or(0); |
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57 Some(HgPath::new(&s.as_bytes()[..p])) |
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58 } |
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59 None => None, |
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60 }; |
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61 next |
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62 } |
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63 } |
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64 |
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65 impl<'a> FusedIterator for Ancestors<'a> {} |
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66 |
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67 /// Returns an iterator yielding ancestor directories of the given repository |
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68 /// path. |
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69 /// |
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70 /// The path is separated by '/', and must not start with '/'. |
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71 /// |
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72 /// The path itself isn't included unless it is b"" (meaning the root |
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73 /// directory.) |
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74 pub fn find_dirs<'a>(path: &'a HgPath) -> Ancestors<'a> { |
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75 let mut dirs = Ancestors { next: Some(path) }; |
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76 if !path.is_empty() { |
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77 dirs.next(); // skip itself |
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78 } |
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79 dirs |
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80 } |
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81 |
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82 /// TODO more than ASCII? |
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83 pub fn normalize_case(path: &HgPath) -> HgPathBuf { |
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84 #[cfg(windows)] // NTFS compares via upper() |
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85 return path.to_ascii_uppercase(); |
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86 #[cfg(unix)] |
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87 path.to_ascii_lowercase() |
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88 } |
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89 |
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90 lazy_static! { |
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91 static ref IGNORED_CHARS: Vec<Vec<u8>> = { |
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92 [ |
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93 0x200c, 0x200d, 0x200e, 0x200f, 0x202a, 0x202b, 0x202c, 0x202d, |
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94 0x202e, 0x206a, 0x206b, 0x206c, 0x206d, 0x206e, 0x206f, 0xfeff, |
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95 ] |
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96 .iter() |
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97 .map(|code| { |
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98 std::char::from_u32(*code) |
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99 .unwrap() |
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100 .encode_utf8(&mut [0; 3]) |
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101 .bytes() |
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102 .collect() |
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103 }) |
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104 .collect() |
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105 }; |
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106 } |
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107 |
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108 fn hfs_ignore_clean(bytes: &[u8]) -> Vec<u8> { |
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109 let mut buf = bytes.to_owned(); |
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110 let needs_escaping = bytes.iter().any(|b| *b == b'\xe2' || *b == b'\xef'); |
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111 if needs_escaping { |
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112 for forbidden in IGNORED_CHARS.iter() { |
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113 replace_slice(&mut buf, forbidden, &[]) |
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114 } |
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115 buf |
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116 } else { |
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117 buf |
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118 } |
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119 } |
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120 |
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121 pub fn lower_clean(bytes: &[u8]) -> Vec<u8> { |
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122 hfs_ignore_clean(&bytes.to_ascii_lowercase()) |
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123 } |
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124 |
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125 #[derive(Eq, PartialEq, Ord, PartialOrd, Copy, Clone)] |
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126 pub struct HgMetadata { |
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127 pub st_dev: u64, |
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128 pub st_mode: u32, |
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129 pub st_nlink: u64, |
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130 pub st_size: u64, |
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131 pub st_mtime: i64, |
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132 pub st_ctime: i64, |
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133 } |
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134 |
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135 // TODO support other plaforms |
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136 #[cfg(unix)] |
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137 impl HgMetadata { |
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138 pub fn from_metadata(metadata: Metadata) -> Self { |
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139 use std::os::unix::fs::MetadataExt; |
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140 Self { |
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141 st_dev: metadata.dev(), |
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142 st_mode: metadata.mode(), |
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143 st_nlink: metadata.nlink(), |
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144 st_size: metadata.size(), |
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145 st_mtime: metadata.mtime(), |
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146 st_ctime: metadata.ctime(), |
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147 } |
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148 } |
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149 } |
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150 |
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151 #[cfg(test)] |
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152 mod tests { |
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153 use super::*; |
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154 |
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155 #[test] |
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156 fn find_dirs_some() { |
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157 let mut dirs = super::find_dirs(HgPath::new(b"foo/bar/baz")); |
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158 assert_eq!(dirs.next(), Some(HgPath::new(b"foo/bar"))); |
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159 assert_eq!(dirs.next(), Some(HgPath::new(b"foo"))); |
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160 assert_eq!(dirs.next(), Some(HgPath::new(b""))); |
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161 assert_eq!(dirs.next(), None); |
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162 assert_eq!(dirs.next(), None); |
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163 } |
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164 |
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165 #[test] |
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166 fn find_dirs_empty() { |
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167 // looks weird, but mercurial.pathutil.finddirs(b"") yields b"" |
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168 let mut dirs = super::find_dirs(HgPath::new(b"")); |
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169 assert_eq!(dirs.next(), Some(HgPath::new(b""))); |
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170 assert_eq!(dirs.next(), None); |
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171 assert_eq!(dirs.next(), None); |
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172 } |
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173 } |