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fix: off-by-one errors in code comment patches (#39887) (#39904)

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Backport #39887 by @silverwind

Code comments next to a diff hunk could show one line too high in the
conversation view vs. in the code view that showed them on the correct
line.

- Treat the hunk end in `CutDiffAroundLine` as exclusive, so the line
after a hunk falls back to the unchanged-line context
- Don't count `\ No newline at end of file` markers as lines when
cutting the hunk
- Share the unchanged-line fallback with migrated review comments

Co-authored-by: silverwind <me@silverwind.io>
This commit is contained in:
Giteabot
2026-10-20 20:37:19 -07:00
committed by GitHub
co-authored by silverwind
parent b758396619
commit 290568a07b
5 changed files with 41 additions and 37 deletions
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modules/git/diff_test.go
+9 -1
View File
@@ -120,10 +120,18 @@ func TestCutDiffAroundLine(t *testing.T) {
assert.Empty(t, emptyResult)
// Line is out of scope
emptyResult, err = CutDiffAroundLine(strings.NewReader(exampleDiff), 434, false, 0)
emptyResult, err = CutDiffAroundLine(strings.NewReader(exampleDiff), 7, false, 3)
assert.NoError(t, err)
assert.Empty(t, emptyResult)
noNewlineDiff := "diff --git a/a b/a\n--- a/a\n+++ b/a\n@@ -1 +1 @@\n-a\n\\ No newline at end of file\n+a"
result, err = CutDiffAroundLine(strings.NewReader(noNewlineDiff), 1, false, 2)
assert.NoError(t, err)
assert.Equal(t, "diff --git a/a b/a\n--- a/a\n+++ b/a\n@@ -1,1 +1,1 @@\n-a\n\\ No newline at end of file\n+a", result)
result, err = CutDiffAroundLine(strings.NewReader(noNewlineDiff), 1, true, 2)
assert.NoError(t, err)
assert.Equal(t, "diff --git a/a b/a\n--- a/a\n+++ b/a\n@@ -1 +1 @@\n-a", result)
// Handle minus diffs properly
minusDiff, err := CutDiffAroundLine(strings.NewReader(breakingDiff), 2, false, 4)
assert.NoError(t, err)