Mercurial > hg
annotate rust/hg-core/src/utils/files.rs @ 43633:0b7733719d21
utils: move finddirs() to pathutil
This is a follow-up to c21aca51b392 (utils: move the `dirs` definition
in pathutil (API), 2019-11-06). finddirs() is closely related to dirs
and used by it.
Differential Revision: https://phab.mercurial-scm.org/D7388
author | Martin von Zweigbergk <martinvonz@google.com> |
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date | Thu, 14 Nov 2019 08:03:26 -0800 |
parents | 99394e6c5d12 |
children | ee3872c14ab3 |
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 /// An iterator over repository path yielding itself and its ancestors. |
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33 #[derive(Copy, Clone, Debug)] |
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34 pub struct Ancestors<'a> { |
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35 next: Option<&'a HgPath>, |
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36 } |
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37 |
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38 impl<'a> Iterator for Ancestors<'a> { |
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39 type Item = &'a HgPath; |
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40 |
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41 fn next(&mut self) -> Option<Self::Item> { |
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42 let next = self.next; |
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43 self.next = match self.next { |
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44 Some(s) if s.is_empty() => None, |
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45 Some(s) => { |
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46 let p = s.bytes().rposition(|c| *c == b'/').unwrap_or(0); |
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47 Some(HgPath::new(&s.as_bytes()[..p])) |
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48 } |
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49 None => None, |
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50 }; |
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51 next |
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52 } |
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53 } |
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54 |
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55 impl<'a> FusedIterator for Ancestors<'a> {} |
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56 |
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57 /// Returns an iterator yielding ancestor directories of the given repository |
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58 /// path. |
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59 /// |
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60 /// The path is separated by '/', and must not start with '/'. |
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61 /// |
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62 /// The path itself isn't included unless it is b"" (meaning the root |
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63 /// directory.) |
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64 pub fn find_dirs<'a>(path: &'a HgPath) -> Ancestors<'a> { |
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65 let mut dirs = Ancestors { next: Some(path) }; |
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66 if !path.is_empty() { |
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67 dirs.next(); // skip itself |
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68 } |
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69 dirs |
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70 } |
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71 |
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72 /// TODO more than ASCII? |
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73 pub fn normalize_case(path: &HgPath) -> HgPathBuf { |
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74 #[cfg(windows)] // NTFS compares via upper() |
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75 return path.to_ascii_uppercase(); |
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76 #[cfg(unix)] |
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77 path.to_ascii_lowercase() |
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78 } |
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79 |
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80 #[derive(Eq, PartialEq, Ord, PartialOrd, Copy, Clone)] |
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81 pub struct HgMetadata { |
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82 pub st_dev: u64, |
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83 pub st_mode: u32, |
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84 pub st_nlink: u64, |
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85 pub st_size: u64, |
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86 pub st_mtime: i64, |
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87 pub st_ctime: i64, |
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88 } |
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89 |
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90 // TODO support other plaforms |
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91 #[cfg(unix)] |
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92 impl HgMetadata { |
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93 pub fn from_metadata(metadata: Metadata) -> Self { |
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94 use std::os::unix::fs::MetadataExt; |
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95 Self { |
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96 st_dev: metadata.dev(), |
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97 st_mode: metadata.mode(), |
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98 st_nlink: metadata.nlink(), |
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99 st_size: metadata.size(), |
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100 st_mtime: metadata.mtime(), |
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101 st_ctime: metadata.ctime(), |
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102 } |
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103 } |
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104 } |
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105 |
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106 #[cfg(test)] |
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107 mod tests { |
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Raphaël Gomès <rgomes@octobus.net>
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108 use super::*; |
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109 |
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110 #[test] |
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111 fn find_dirs_some() { |
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112 let mut dirs = super::find_dirs(HgPath::new(b"foo/bar/baz")); |
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113 assert_eq!(dirs.next(), Some(HgPath::new(b"foo/bar"))); |
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114 assert_eq!(dirs.next(), Some(HgPath::new(b"foo"))); |
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115 assert_eq!(dirs.next(), Some(HgPath::new(b""))); |
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116 assert_eq!(dirs.next(), None); |
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117 assert_eq!(dirs.next(), None); |
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118 } |
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119 |
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120 #[test] |
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121 fn find_dirs_empty() { |
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122 // looks weird, but mercurial.pathutil.finddirs(b"") yields b"" |
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123 let mut dirs = super::find_dirs(HgPath::new(b"")); |
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124 assert_eq!(dirs.next(), Some(HgPath::new(b""))); |
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125 assert_eq!(dirs.next(), None); |
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126 assert_eq!(dirs.next(), None); |
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127 } |
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128 } |