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Detect conflicts with 3way merge #18536

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merged 3 commits into from
Feb 2, 2022
Merged

Detect conflicts with 3way merge #18536

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842feda
Detect conflicts with 3way merge
zeripath Feb 1, 2022
3cc2fa6
and three-way failed
zeripath Feb 1, 2022
baec519
Merge branch 'main' into fix-18514-improve-3way-handling
lunny Feb 2, 2022
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13 changes: 13 additions & 0 deletions services/pull/patch.go
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Original file line number Diff line number Diff line change
Expand Up @@ -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)
Expand Down Expand Up @@ -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{}

Expand All @@ -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 {
Expand All @@ -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 {
Expand Down