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annotate rust/hg-core/src/narrow.rs @ 53042:cdd7bf612c7b stable tip

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bundle-spec: properly format boolean parameter (issue6960) This was breaking automatic clone bundle generation. This changeset fixes it and add a test to catch it in the future.
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Tue, 11 Mar 2025 02:29:42 +0100
parents b019b5798e8f
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 use std::path::Path;
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2
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3 use crate::{
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4 errors::HgError,
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5 exit_codes,
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6 filepatterns::parse_pattern_file_contents,
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7 matchers::{
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8 AlwaysMatcher, DifferenceMatcher, IncludeMatcher, Matcher,
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9 NeverMatcher,
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10 },
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11 repo::Repo,
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12 requirements::NARROW_REQUIREMENT,
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13 sparse::{self, SparseConfigError, SparseWarning},
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14 };
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15
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16 /// The file in .hg/store/ that indicates which paths exit in the store
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17 const FILENAME: &str = "narrowspec";
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18 /// The file in .hg/ that indicates which paths exit in the dirstate
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19 const DIRSTATE_FILENAME: &str = "narrowspec.dirstate";
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20
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21 /// Pattern prefixes that are allowed in narrow patterns. This list MUST
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22 /// only contain patterns that are fast and safe to evaluate. Keep in mind
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23 /// that patterns are supplied by clients and executed on remote servers
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24 /// as part of wire protocol commands. That means that changes to this
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25 /// data structure influence the wire protocol and should not be taken
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26 /// lightly - especially removals.
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27 pub const VALID_PREFIXES: [&str; 2] = ["path:", "rootfilesin:"];
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28
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29 /// Return the matcher for the current narrow spec, and all configuration
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30 /// warnings to display.
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31 pub fn matcher(
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32 repo: &Repo,
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33 ) -> Result<(Box<dyn Matcher + Sync>, Vec<SparseWarning>), SparseConfigError> {
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34 let mut warnings = vec![];
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35 if !repo.requirements().contains(NARROW_REQUIREMENT) {
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36 return Ok((Box::new(AlwaysMatcher), warnings));
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37 }
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38 // Treat "narrowspec does not exist" the same as "narrowspec file exists
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39 // and is empty".
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40 let store_spec = repo.store_vfs().try_read(FILENAME)?.unwrap_or_default();
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41 let working_copy_spec = repo
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42 .hg_vfs()
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43 .try_read(DIRSTATE_FILENAME)?
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44 .unwrap_or_default();
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45 if store_spec != working_copy_spec {
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46 return Err(HgError::abort(
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47 "abort: working copy's narrowspec is stale",
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48 exit_codes::STATE_ERROR,
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49 Some("run 'hg tracked --update-working-copy'".into()),
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50 )
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51 .into());
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52 }
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53
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54 let config = sparse::parse_config(
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55 &store_spec,
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56 sparse::SparseConfigContext::Narrow,
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57 )?;
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58
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59 warnings.extend(config.warnings);
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60
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61 if !config.profiles.is_empty() {
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62 // TODO (from Python impl) maybe do something with profiles?
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63 return Err(SparseConfigError::IncludesInNarrow);
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64 }
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65 validate_patterns(&config.includes)?;
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66 validate_patterns(&config.excludes)?;
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67
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68 if config.includes.is_empty() {
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69 return Ok((Box::new(NeverMatcher), warnings));
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70 }
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71
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72 let (patterns, subwarnings) = parse_pattern_file_contents(
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73 &config.includes,
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74 Path::new(""),
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75 None,
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76 false,
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77 true,
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78 )?;
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79 warnings.extend(subwarnings.into_iter().map(From::from));
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80
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81 let mut m: Box<dyn Matcher + Sync> =
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82 Box::new(IncludeMatcher::new(patterns)?);
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83
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84 let (patterns, subwarnings) = parse_pattern_file_contents(
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85 &config.excludes,
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86 Path::new(""),
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87 None,
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88 false,
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89 true,
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90 )?;
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91 if !patterns.is_empty() {
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92 warnings.extend(subwarnings.into_iter().map(From::from));
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93 let exclude_matcher = Box::new(IncludeMatcher::new(patterns)?);
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94 m = Box::new(DifferenceMatcher::new(m, exclude_matcher));
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95 }
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96
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97 Ok((m, warnings))
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98 }
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99
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100 fn is_whitespace(b: &u8) -> bool {
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101 // should match what .strip() in Python does
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102 b.is_ascii_whitespace() || *b == 0x0b
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103 }
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104
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105 fn starts_or_ends_with_whitespace(s: &[u8]) -> bool {
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106 let w = |b: Option<&u8>| b.map(is_whitespace).unwrap_or(false);
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107 w(s.first()) || w(s.last())
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108 }
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109
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110 fn validate_pattern(pattern: &[u8]) -> Result<(), SparseConfigError> {
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111 if starts_or_ends_with_whitespace(pattern) {
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112 return Err(SparseConfigError::WhitespaceAtEdgeOfPattern(
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113 pattern.to_owned(),
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114 ));
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115 }
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116 for prefix in VALID_PREFIXES.iter() {
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117 if pattern.starts_with(prefix.as_bytes()) {
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118 return Ok(());
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119 }
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120 }
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121 Err(SparseConfigError::InvalidNarrowPrefix(pattern.to_owned()))
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122 }
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123
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124 fn validate_patterns(patterns: &[u8]) -> Result<(), SparseConfigError> {
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125 for pattern in patterns.split(|c| *c == b'\n') {
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126 if pattern.is_empty() {
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127 // TODO: probably not intentionally allowed (only because `split`
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128 // produces "fake" empty line at the end)
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129 continue;
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130 }
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131 validate_pattern(pattern)?
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132 }
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133 Ok(())
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134 }