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ignore: fix gitignore parsing bug for trailing \/

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When a glob pattern ended with a \/, and since we permit backslash
escapes, the glob parser gave a "dangling escape" error. Which is weird,
because the \ is clearly not dangling.

The issue is that the layer above the glob parser, the gitignore parser,
was stripping the trailing / so that it wouldn't be part of the matching
logic. Of course, stripping the trailing / while it is escaped without
removing the backslash escape is wrong. So we do that here.

Fixes #2236
This commit is contained in:
Andrew Gallant 2022-06-14 10:38:32 -04:00
parent eb4b389846
commit 9f0e88bcb1
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GPG Key ID: B2E3A4923F8B0D44
3 changed files with 19 additions and 6 deletions
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6
CHANGELOG.md
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@ -1,5 +1,5 @@
13.0.1
======
TBD
===
Unreleased changes. Release notes have not yet been written.
Bug fixes:
@ -8,6 +8,8 @@ Bug fixes:
Fix bug when using `-w` with a regex that can match the empty string.
* [BUG #1911](https://github.com/BurntSushi/ripgrep/issues/1911):
Disable mmap searching in all non-64-bit environments.
* [BUG #2236](https://github.com/BurntSushi/ripgrep/issues/2236):
Fix gitignore parsing bug where a trailing `\/` resulted in an error.
13.0.0 (2021-06-12)

11
crates/ignore/src/gitignore.rs
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@ -474,10 +474,13 @@ impl GitignoreBuilder {
}
// If it ends with a slash, then this should only match directories,
// but the slash should otherwise not be used while globbing.
if let Some((i, c)) = line.char_indices().rev().nth(0) {
if c == '/' {
glob.is_only_dir = true;
line = &line[..i];
if line.as_bytes().last() == Some(&b'/') {
glob.is_only_dir = true;
line = &line[..line.len() - 1];
// If the slash was escaped, then remove the escape.
// See: https://github.com/BurntSushi/ripgrep/issues/2236
if line.as_bytes().last() == Some(&b'\\') {
line = &line[..line.len() - 1];
}
}
glob.actual = line.to_string();

8
tests/regression.rs
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@ -1118,3 +1118,11 @@ pipc () { # [-h] [-U|-u <pkgspec>[,<pkgspec>...]] [<reqs-in>...] [-- <pip-compi
let expected = " [-h] [-U|-u <pkgspec>[,<pkgspec>...]] [<reqs-in>...] [-- <pip-compile-arg>...]\n";
eqnice!(expected, cmd.stdout());
});
// See: https://github.com/BurntSushi/ripgrep/issues/2236
rgtest!(r2236, |dir: Dir, mut cmd: TestCommand| {
dir.create(".ignore", r"foo\/");
dir.create_dir("foo");
dir.create("foo/bar", "test\n");
cmd.args(&["test"]).assert_err();
});