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Detect conflicts with 3way merge (#18536) (#18537)

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Backport #18536

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>
This commit is contained in:
zeripath 2022-02-02 14:35:25 +00:00 committed by GitHub
parent 1d17313949
commit 0dfe5fa2d6
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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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@ -339,8 +339,10 @@ func checkConflicts(pr *models.PullRequest, gitRepo *git.Repository, tmpBasePath
if prConfig.IgnoreWhitespaceConflicts { if prConfig.IgnoreWhitespaceConflicts {
args = append(args, "--ignore-whitespace") args = append(args, "--ignore-whitespace")
} }
is3way := false
if git.CheckGitVersionAtLeast("2.32.0") == nil { if git.CheckGitVersionAtLeast("2.32.0") == nil {
args = append(args, "--3way") args = append(args, "--3way")
is3way = true
} }
args = append(args, patchPath) args = append(args, patchPath)
pr.ConflictedFiles = make([]string, 0, 5) pr.ConflictedFiles = make([]string, 0, 5)
@ -379,6 +381,9 @@ func checkConflicts(pr *models.PullRequest, gitRepo *git.Repository, tmpBasePath
const prefix = "error: patch failed:" const prefix = "error: patch failed:"
const errorPrefix = "error: " const errorPrefix = "error: "
const threewayFailed = "Failed to perform three-way merge..."
const appliedPatchPrefix = "Applied patch to '"
const withConflicts = "' with conflicts."
conflictMap := map[string]bool{} conflictMap := map[string]bool{}
@ -390,6 +395,8 @@ func checkConflicts(pr *models.PullRequest, gitRepo *git.Repository, tmpBasePath
conflict = true conflict = true
filepath := strings.TrimSpace(strings.Split(line[len(prefix):], ":")[0]) filepath := strings.TrimSpace(strings.Split(line[len(prefix):], ":")[0])
conflictMap[filepath] = true conflictMap[filepath] = true
} else if is3way && line == threewayFailed {
conflict = true
} else if strings.HasPrefix(line, errorPrefix) { } else if strings.HasPrefix(line, errorPrefix) {
conflict = true conflict = true
for _, suffix := range patchErrorSuffices { for _, suffix := range patchErrorSuffices {
@ -401,6 +408,12 @@ func checkConflicts(pr *models.PullRequest, gitRepo *git.Repository, tmpBasePath
break 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 // only list 10 conflicted files
if len(conflictMap) >= 10 { if len(conflictMap) >= 10 {