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Detect conflicts with 3way merge (#18536)

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* Detect conflicts with 3way merge

Unforunately git apply --3way reports conflicts differently than standard patches
resulting in conflicts being missed.

Adjust the conflict detection code to account for this different error reporting.

Fix #18514

Signed-off-by: Andrew Thornton <art27@cantab.net>

* and three-way failed

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
This commit is contained in:
zeripath 2022-02-02 04:46:10 +00:00 committed by GitHub
parent 5469e61a8e
commit 92e81e97e8
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1 changed files with 13 additions and 0 deletions
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13
services/pull/patch.go
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@ -343,8 +343,10 @@ func checkConflicts(pr *models.PullRequest, gitRepo *git.Repository, tmpBasePath
if prConfig.IgnoreWhitespaceConflicts {
args = append(args, "--ignore-whitespace")
}
is3way := false
if git.CheckGitVersionAtLeast("2.32.0") == nil {
args = append(args, "--3way")
is3way = true
}
args = append(args, patchPath)
pr.ConflictedFiles = make([]string, 0, 5)
@ -383,6 +385,9 @@ func checkConflicts(pr *models.PullRequest, gitRepo *git.Repository, tmpBasePath
const prefix = "error: patch failed:"
const errorPrefix = "error: "
const threewayFailed = "Failed to perform three-way merge..."
const appliedPatchPrefix = "Applied patch to '"
const withConflicts = "' with conflicts."
conflictMap := map[string]bool{}
@ -394,6 +399,8 @@ func checkConflicts(pr *models.PullRequest, gitRepo *git.Repository, tmpBasePath
conflict = true
filepath := strings.TrimSpace(strings.Split(line[len(prefix):], ":")[0])
conflictMap[filepath] = true
} else if is3way && line == threewayFailed {
conflict = true
} else if strings.HasPrefix(line, errorPrefix) {
conflict = true
for _, suffix := range patchErrorSuffices {
@ -405,6 +412,12 @@ func checkConflicts(pr *models.PullRequest, gitRepo *git.Repository, tmpBasePath
break
}
}
} else if is3way && strings.HasPrefix(line, appliedPatchPrefix) && strings.HasSuffix(line, withConflicts) {
conflict = true
filepath := strings.TrimPrefix(strings.TrimSuffix(line, withConflicts), appliedPatchPrefix)
if filepath != "" {
conflictMap[filepath] = true
}
}
// only list 10 conflicted files
if len(conflictMap) >= 10 {