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Improve squash merge commit author and co-author with private emails (#22977)

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When emails addresses are private, squash merges always use
`@noreply.localhost` for the author of the squash commit. And the author
is redundantly added as a co-author in the commit message.

Also without private mails, the redundant co-author is possible when
committing with a signature that's different than the user full name and
primary email.

Now try to find a commit by the same user in the list of commits, and
prefer the signature from that over one constructed from the account
settings.
This commit is contained in:
Brecht Van Lommel 2023-03-10 04:17:04 +01:00 committed by GitHub
parent 0141d1667d
commit d647e74502
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
2 changed files with 53 additions and 7 deletions
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48
services/pull/merge_squash.go
View file

@ -7,24 +7,62 @@ import (
"fmt"
repo_model "code.gitea.io/gitea/models/repo"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/container"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
)
// doMergeStyleSquash gets a commit author signature for squash commits
func getAuthorSignatureSquash(ctx *mergeContext) (*git.Signature, error) {
if err := ctx.pr.Issue.LoadPoster(ctx); err != nil {
log.Error("%-v Issue[%d].LoadPoster: %v", ctx.pr, ctx.pr.Issue.ID, err)
return nil, err
}
// Try to get an signature from the same user in one of the commits, as the
// poster email might be private or commits might have a different signature
// than the primary email address of the poster.
gitRepo, closer, err := git.RepositoryFromContextOrOpen(ctx, ctx.tmpBasePath)
if err != nil {
log.Error("%-v Unable to open base repository: %v", ctx.pr, err)
return nil, err
}
defer closer.Close()
commits, err := gitRepo.CommitsBetweenIDs(trackingBranch, "HEAD")
if err != nil {
log.Error("%-v Unable to get commits between: %s %s: %v", ctx.pr, "HEAD", trackingBranch, err)
return nil, err
}
uniqueEmails := make(container.Set[string])
for _, commit := range commits {
if commit.Author != nil && uniqueEmails.Add(commit.Author.Email) {
commitUser, _ := user_model.GetUserByEmail(ctx, commit.Author.Email)
if commitUser != nil && commitUser.ID == ctx.pr.Issue.Poster.ID {
return commit.Author, nil
}
}
}
return ctx.pr.Issue.Poster.NewGitSig(), nil
}
// doMergeStyleSquash squashes the tracking branch on the current HEAD (=base)
func doMergeStyleSquash(ctx *mergeContext, message string) error {
sig, err := getAuthorSignatureSquash(ctx)
if err != nil {
return fmt.Errorf("getAuthorSignatureSquash: %w", err)
}
cmdMerge := git.NewCommand(ctx, "merge", "--squash").AddDynamicArguments(trackingBranch)
if err := runMergeCommand(ctx, repo_model.MergeStyleSquash, cmdMerge); err != nil {
log.Error("%-v Unable to merge --squash tracking into base: %v", ctx.pr, err)
return err
}
if err := ctx.pr.Issue.LoadPoster(ctx); err != nil {
log.Error("%-v Issue[%d].LoadPoster: %v", ctx.pr, ctx.pr.Issue.ID, err)
return fmt.Errorf("LoadPoster: %w", err)
}
sig := ctx.pr.Issue.Poster.NewGitSig()
if setting.Repository.PullRequest.AddCoCommitterTrailers && ctx.committer.String() != sig.String() {
// add trailer
message += fmt.Sprintf("\nCo-authored-by: %s\nCo-committed-by: %s\n", sig.String(), sig.String())

8
services/pull/pull.go
View file

@ -669,9 +669,14 @@ func GetSquashMergeCommitMessages(ctx context.Context, pr *issues_model.PullRequ
authorString := commit.Author.String()
if uniqueAuthors.Add(authorString) && authorString != posterSig {
// Compare use account as well to avoid adding the same author multiple times
// times when email addresses are private or multiple emails are used.
commitUser, _ := user_model.GetUserByEmail(ctx, commit.Author.Email)
if commitUser == nil || commitUser.ID != pr.Issue.Poster.ID {
authors = append(authors, authorString)
}
}
}
// Consider collecting the remaining authors
if limit >= 0 && setting.Repository.PullRequest.DefaultMergeMessageAllAuthors {
@ -690,9 +695,12 @@ func GetSquashMergeCommitMessages(ctx context.Context, pr *issues_model.PullRequ
for _, commit := range commits {
authorString := commit.Author.String()
if uniqueAuthors.Add(authorString) && authorString != posterSig {
commitUser, _ := user_model.GetUserByEmail(ctx, commit.Author.Email)
if commitUser == nil || commitUser.ID != pr.Issue.Poster.ID {
authors = append(authors, authorString)
}
}
}
skip += limit
}
}