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fix: accept whitespace-padded patch markers (#8746)

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Trim whitespace when validating '*** Begin Patch'/'*** End Patch'
markers in codex-apply-patch so padded marker lines parse as intended,
and add regression coverage (unit + fixture scenario); this avoids
apply_patch failures when models include extra spacing. Tested with
cargo test -p codex-apply-patch.
This commit is contained in:
Thibault Sottiaux
2026-01-05 17:41:23 -08:00
committed by GitHub
parent b1c93e135b
commit 771f1ca6ab
4 changed files with 32 additions and 2 deletions
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26
codex-rs/apply-patch/src/parser.rs
View File

@@ -227,11 +227,14 @@ fn check_start_and_end_lines_strict(
first_line: Option<&&str>,
last_line: Option<&&str>,
) -> Result<(), ParseError> {
let first_line = first_line.map(|line| line.trim());
let last_line = last_line.map(|line| line.trim());
match (first_line, last_line) {
(Some(&first), Some(&last)) if first == BEGIN_PATCH_MARKER && last == END_PATCH_MARKER => {
(Some(first), Some(last)) if first == BEGIN_PATCH_MARKER && last == END_PATCH_MARKER => {
Ok(())
}
(Some(&first), _) if first != BEGIN_PATCH_MARKER => Err(InvalidPatchError(String::from(
(Some(first), _) if first != BEGIN_PATCH_MARKER => Err(InvalidPatchError(String::from(
"The first line of the patch must be '*** Begin Patch'",
))),
_ => Err(InvalidPatchError(String::from(
@@ -444,6 +447,25 @@ fn test_parse_patch() {
"The last line of the patch must be '*** End Patch'".to_string()
))
);
assert_eq!(
parse_patch_text(
concat!(
"*** Begin Patch",
" ",
"\n*** Add File: foo\n+hi\n",
" ",
"*** End Patch"
),
ParseMode::Strict
)
.unwrap()
.hunks,
vec![AddFile {
path: PathBuf::from("foo"),
contents: "hi\n".to_string()
}]
);
assert_eq!(
parse_patch_text(
"*** Begin Patch\n\

1
codex-rs/apply-patch/tests/fixtures/scenarios/020_whitespace_padded_patch_marker_lines/expected/file.txt vendored Normal file
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@@ -0,0 +1 @@
two

1
codex-rs/apply-patch/tests/fixtures/scenarios/020_whitespace_padded_patch_marker_lines/input/file.txt vendored Normal file
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@@ -0,0 +1 @@
one

6
codex-rs/apply-patch/tests/fixtures/scenarios/020_whitespace_padded_patch_marker_lines/patch.txt vendored Normal file
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@@ -0,0 +1,6 @@
*** Begin Patch
*** Update File: file.txt
@@
-one
+two
*** End Patch