author | Antoine Cezar <antoine.cezar@octobus.net> |
Fri, 11 Sep 2020 17:32:53 +0200 | |
changeset 45547 | 522ec3dc44b9 |
child 45823 | 6991f3014311 |
permissions | -rw-r--r-- |
45547
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// list_tracked_files.rs |
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// |
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// Copyright 2020 Antoine Cezar <antoine.cezar@octobus.net> |
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// |
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// This software may be used and distributed according to the terms of the |
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// GNU General Public License version 2 or any later version. |
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|
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use std::convert::From; |
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use std::path::PathBuf; |
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|
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use crate::revlog::changelog::Changelog; |
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use crate::revlog::manifest::{Manifest, ManifestEntry}; |
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use crate::revlog::path_encode::path_encode; |
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use crate::revlog::revlog::Revlog; |
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use crate::revlog::revlog::RevlogError; |
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use crate::revlog::Revision; |
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use crate::utils::hg_path::HgPathBuf; |
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|
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/// Kind of error encountered by `CatRev` |
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#[derive(Debug)] |
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pub enum CatRevErrorKind { |
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/// Error when reading a `revlog` file. |
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IoError(std::io::Error), |
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/// The revision has not been found. |
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InvalidRevision, |
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/// A `revlog` file is corrupted. |
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CorruptedRevlog, |
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/// The `revlog` format version is not supported. |
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UnsuportedRevlogVersion(u16), |
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/// The `revlog` data format is not supported. |
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UnknowRevlogDataFormat(u8), |
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} |
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|
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/// A `CatRev` error |
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#[derive(Debug)] |
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pub struct CatRevError { |
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/// Kind of error encountered by `CatRev` |
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pub kind: CatRevErrorKind, |
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} |
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impl From<CatRevErrorKind> for CatRevError { |
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fn from(kind: CatRevErrorKind) -> Self { |
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CatRevError { kind } |
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} |
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} |
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impl From<RevlogError> for CatRevError { |
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fn from(err: RevlogError) -> Self { |
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match err { |
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RevlogError::IoError(err) => CatRevErrorKind::IoError(err), |
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RevlogError::UnsuportedVersion(version) => { |
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CatRevErrorKind::UnsuportedRevlogVersion(version) |
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} |
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RevlogError::InvalidRevision => CatRevErrorKind::InvalidRevision, |
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RevlogError::Corrupted => CatRevErrorKind::CorruptedRevlog, |
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RevlogError::UnknowDataFormat(format) => { |
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CatRevErrorKind::UnknowRevlogDataFormat(format) |
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} |
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} |
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.into() |
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} |
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} |
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|
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/// List files under Mercurial control at a given revision. |
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pub struct CatRev<'a> { |
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root: &'a PathBuf, |
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/// The revision to cat the files from. |
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rev: &'a str, |
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/// The files to output. |
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files: &'a [HgPathBuf], |
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/// The changelog file |
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changelog: Changelog, |
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/// The manifest file |
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manifest: Manifest, |
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/// The manifest entry corresponding to the revision. |
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/// |
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/// Used to hold the owner of the returned references. |
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manifest_entry: Option<ManifestEntry>, |
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} |
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|
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impl<'a> CatRev<'a> { |
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pub fn new( |
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root: &'a PathBuf, |
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rev: &'a str, |
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files: &'a [HgPathBuf], |
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) -> Result<Self, CatRevError> { |
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let changelog = Changelog::open(&root)?; |
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let manifest = Manifest::open(&root)?; |
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let manifest_entry = None; |
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|
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Ok(Self { |
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root, |
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rev, |
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files, |
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changelog, |
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manifest, |
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manifest_entry, |
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}) |
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} |
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pub fn run(&mut self) -> Result<Vec<u8>, CatRevError> { |
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let changelog_entry = match self.rev.parse::<Revision>() { |
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Ok(rev) => self.changelog.get_rev(rev)?, |
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_ => { |
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let changelog_node = hex::decode(&self.rev) |
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.map_err(|_| CatRevErrorKind::InvalidRevision)?; |
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self.changelog.get_node(&changelog_node)? |
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} |
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}; |
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let manifest_node = hex::decode(&changelog_entry.manifest_node()?) |
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.map_err(|_| CatRevErrorKind::CorruptedRevlog)?; |
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|
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113 |
self.manifest_entry = Some(self.manifest.get_node(&manifest_node)?); |
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114 |
if let Some(ref manifest_entry) = self.manifest_entry { |
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115 |
let mut bytes = vec![]; |
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116 |
|
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117 |
for (manifest_file, node_bytes) in |
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118 |
manifest_entry.files_with_nodes() |
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119 |
{ |
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120 |
for cat_file in self.files.iter() { |
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121 |
if cat_file.as_bytes() == manifest_file.as_bytes() { |
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122 |
let encoded_bytes = |
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123 |
path_encode(manifest_file.as_bytes()); |
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124 |
let revlog_index_string = format!( |
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125 |
".hg/store/data/{}.i", |
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126 |
String::from_utf8_lossy(&encoded_bytes), |
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127 |
); |
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128 |
let revlog_index_path = |
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129 |
self.root.join(&revlog_index_string); |
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130 |
let file_log = Revlog::open(&revlog_index_path)?; |
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131 |
let file_node = hex::decode(&node_bytes) |
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132 |
.map_err(|_| CatRevErrorKind::CorruptedRevlog)?; |
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133 |
let file_rev = file_log.get_node_rev(&file_node)?; |
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134 |
let data = file_log.get_rev_data(file_rev)?; |
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135 |
bytes.extend(data); |
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136 |
} |
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137 |
} |
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138 |
} |
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139 |
|
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140 |
Ok(bytes) |
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141 |
} else { |
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142 |
unreachable!("manifest_entry should have been stored"); |
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143 |
} |
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144 |
} |
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145 |
} |