reivilibre/yama
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Fix bug in path iteration leading to bug in gradual scans

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This commit is contained in:
Olivier 'reivilibre' 2023-08-11 20:24:59 +01:00
parent e85c8c372d
commit 6b72672d29
2 changed files with 23 additions and 19 deletions
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38
yama/src/scan.rs
View File

@ -265,15 +265,7 @@ pub fn prepopulate_unmodified(
);
// Pull out parent directories so our subset always contains the parents for their children.
let mut path_fragment = path.as_bytes();
while let Some((index, _)) = path_fragment
.iter()
.enumerate()
.rev()
.find(|(_idx, char_byte)| **char_byte == b'/')
{
path_fragment = &path_fragment[0..index];
for path_fragment in iterate_dirs_upwards(path.as_bytes()) {
if let Some(directory) = pruned_scan_entry_map.remove(path_fragment)
{
prepopulated_scan_entry_map.insert(path_fragment, directory);
@ -345,15 +337,7 @@ pub fn limit_scan_entry_map_to_size(
accum_size += size_of_entry;
// Pull out parent directories so our subset always contains the parents for their children.
let mut path_fragment = &path_bytes[..];
while let Some((index, _)) = path_fragment
.iter()
.enumerate()
.rev()
.find(|(_idx, char_byte)| **char_byte == b'/')
{
path_fragment = &path_bytes[0..index];
for path_fragment in iterate_dirs_upwards(&path_bytes) {
if let Some(directory) = unincluded_directories.remove(path_fragment) {
result.insert(path_fragment, directory);
accum_size += 4096;
@ -375,6 +359,24 @@ pub fn limit_scan_entry_map_to_size(
result
}
/// Returns a list of all the parent paths of the given path (in bytes),
/// including the root, in order from leaf to root.
pub fn iterate_dirs_upwards(path_bytes: &[u8]) -> Vec<&[u8]> {
let mut result = Vec::new();
let mut path_fragment = &path_bytes[..];
while let Some((index, _)) = path_fragment
.iter()
.enumerate()
.rev()
.find(|(_idx, char_byte)| **char_byte == b'/')
{
path_fragment = &path_bytes[0..index];
result.push(path_fragment);
}
result.push(&path_bytes[0..0]);
result
}
#[cfg(test)]
mod tests {
use crate::scan::limit_scan_entry_map_to_size;

4
yama_pile/src/tree.rs
View File

@ -417,7 +417,9 @@ pub fn assemble_tree_from_scan_entries(
// note: for the root, this inserts the root file entry as a child called "" within a fake root 'directory'.
// That's fine. We'll patch this up later.
dirs.get_mut(parent_dir_name)
.context("bad PMap: parent not seen first")?
.with_context(|| {
format!("bad PMap: parent {parent_dir_name} not seen first")
})?
.insert(
child_name.to_owned(),
TreeNode::NormalFile {