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gitignore: don't apply patterns to parent directories

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If you create a `dir/.gitignore` file with pattern "dir" in it, it'll
currently match the parent directory, making e.g. the `dir/.gitignore`
file itself ignored. That was quite confusing, and it doesn't match
how Git behaves. This patch fixes the bug.
This commit is contained in:
Martin von Zweigbergk 2022-01-12 11:01:14 -08:00
parent 5b84e192fc
commit 8a0afc3016
1 changed files with 13 additions and 6 deletions
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19
lib/src/gitignore.rs
View file

@ -83,11 +83,10 @@ impl GitIgnoreLine {
is_rooted |= input.contains('/');
let mut regex = String::new();
if is_rooted {
regex.insert_str(0, prefix);
regex.insert(0, '^');
} else {
regex.insert_str(0, "(^|/)");
regex.push('^');
regex.push_str(prefix);
if !is_rooted {
regex.push_str("(.*/)?");
}
let components = input.split('/').collect_vec();
@ -271,11 +270,19 @@ mod tests {
let file = GitIgnoreFile::empty().chain("dir/", b"foo\n").ok().unwrap();
// I consider it undefined whether a file in a parent directory matches, but
// let's test it anyway
assert!(file.matches_file("foo"));
assert!(!file.matches_file("foo"));
assert!(file.matches_file("dir/foo"));
assert!(file.matches_file("dir/subdir/foo"));
}
#[test]
fn test_gitignore_pattern_same_as_prefix() {
let file = GitIgnoreFile::empty().chain("dir/", b"dir\n").ok().unwrap();
assert!(file.matches_file("dir/dir"));
// We don't want the "dir" pattern to apply to the parent directory
assert!(!file.matches_file("dir/foo"));
}
#[test]
fn test_gitignore_rooted_literal() {
let file = GitIgnoreFile::empty().chain("", b"/foo\n").ok().unwrap();