Mercurial > hg
annotate rust/hg-core/src/utils/files.rs @ 43869:cf065c6a0197
merge with stable
author | Martin von Zweigbergk <martinvonz@google.com> |
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date | Fri, 13 Dec 2019 10:10:40 -0800 |
parents | ee3872c14ab3 b06cf2809ec3 |
children | c18dd48cea4a |
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 std::fs::Metadata; |
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16 use std::path::Path; |
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17 |
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18 pub fn get_path_from_bytes(bytes: &[u8]) -> &Path { |
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19 let os_str; |
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20 #[cfg(unix)] |
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21 { |
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22 use std::os::unix::ffi::OsStrExt; |
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23 os_str = std::ffi::OsStr::from_bytes(bytes); |
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24 } |
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25 // TODO Handle other platforms |
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26 // TODO: convert from WTF8 to Windows MBCS (ANSI encoding). |
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27 // Perhaps, the return type would have to be Result<PathBuf>. |
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28 |
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29 Path::new(os_str) |
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30 } |
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31 |
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32 // TODO: need to convert from WTF8 to MBCS bytes on Windows. |
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33 // that's why Vec<u8> is returned. |
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34 #[cfg(unix)] |
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35 pub fn get_bytes_from_path(path: impl AsRef<Path>) -> Vec<u8> { |
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36 use std::os::unix::ffi::OsStrExt; |
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37 path.as_ref().as_os_str().as_bytes().to_vec() |
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38 } |
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39 |
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40 /// An iterator over repository path yielding itself and its ancestors. |
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41 #[derive(Copy, Clone, Debug)] |
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42 pub struct Ancestors<'a> { |
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43 next: Option<&'a HgPath>, |
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44 } |
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45 |
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46 impl<'a> Iterator for Ancestors<'a> { |
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47 type Item = &'a HgPath; |
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48 |
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49 fn next(&mut self) -> Option<Self::Item> { |
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50 let next = self.next; |
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51 self.next = match self.next { |
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52 Some(s) if s.is_empty() => None, |
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53 Some(s) => { |
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54 let p = s.bytes().rposition(|c| *c == b'/').unwrap_or(0); |
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55 Some(HgPath::new(&s.as_bytes()[..p])) |
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56 } |
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57 None => None, |
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58 }; |
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59 next |
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60 } |
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61 } |
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62 |
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63 impl<'a> FusedIterator for Ancestors<'a> {} |
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64 |
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65 /// Returns an iterator yielding ancestor directories of the given repository |
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66 /// path. |
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67 /// |
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68 /// The path is separated by '/', and must not start with '/'. |
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69 /// |
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70 /// The path itself isn't included unless it is b"" (meaning the root |
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71 /// directory.) |
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72 pub fn find_dirs<'a>(path: &'a HgPath) -> Ancestors<'a> { |
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73 let mut dirs = Ancestors { next: Some(path) }; |
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74 if !path.is_empty() { |
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75 dirs.next(); // skip itself |
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76 } |
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77 dirs |
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78 } |
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79 |
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80 /// TODO more than ASCII? |
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81 pub fn normalize_case(path: &HgPath) -> HgPathBuf { |
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82 #[cfg(windows)] // NTFS compares via upper() |
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83 return path.to_ascii_uppercase(); |
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84 #[cfg(unix)] |
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85 path.to_ascii_lowercase() |
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86 } |
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87 |
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88 #[derive(Eq, PartialEq, Ord, PartialOrd, Copy, Clone)] |
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89 pub struct HgMetadata { |
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90 pub st_dev: u64, |
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91 pub st_mode: u32, |
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92 pub st_nlink: u64, |
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93 pub st_size: u64, |
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94 pub st_mtime: i64, |
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95 pub st_ctime: i64, |
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96 } |
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97 |
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98 // TODO support other plaforms |
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99 #[cfg(unix)] |
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100 impl HgMetadata { |
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101 pub fn from_metadata(metadata: Metadata) -> Self { |
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102 use std::os::unix::fs::MetadataExt; |
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103 Self { |
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104 st_dev: metadata.dev(), |
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105 st_mode: metadata.mode(), |
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106 st_nlink: metadata.nlink(), |
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107 st_size: metadata.size(), |
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108 st_mtime: metadata.mtime(), |
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109 st_ctime: metadata.ctime(), |
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110 } |
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111 } |
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112 } |
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113 |
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114 #[cfg(test)] |
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115 mod tests { |
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116 use super::*; |
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117 |
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118 #[test] |
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119 fn find_dirs_some() { |
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120 let mut dirs = super::find_dirs(HgPath::new(b"foo/bar/baz")); |
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121 assert_eq!(dirs.next(), Some(HgPath::new(b"foo/bar"))); |
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122 assert_eq!(dirs.next(), Some(HgPath::new(b"foo"))); |
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123 assert_eq!(dirs.next(), Some(HgPath::new(b""))); |
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124 assert_eq!(dirs.next(), None); |
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125 assert_eq!(dirs.next(), None); |
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126 } |
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127 |
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128 #[test] |
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129 fn find_dirs_empty() { |
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130 // looks weird, but mercurial.pathutil.finddirs(b"") yields b"" |
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131 let mut dirs = super::find_dirs(HgPath::new(b"")); |
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132 assert_eq!(dirs.next(), Some(HgPath::new(b""))); |
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133 assert_eq!(dirs.next(), None); |
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134 assert_eq!(dirs.next(), None); |
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135 } |
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136 } |