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//go:build static && system_libgit2
package main
import (
"context"
"encoding/gob"
"errors"
"flag"
"fmt"
git "github.com/libgit2/git2go/v34"
"gitlab.com/gitlab-org/gitaly/v16/cmd/gitaly-git2go/git2goutil"
"gitlab.com/gitlab-org/gitaly/v16/internal/git2go"
)
type revertSubcommand struct{}
func (cmd *revertSubcommand) Flags() *flag.FlagSet {
return flag.NewFlagSet("revert", flag.ExitOnError)
}
func (cmd *revertSubcommand) Run(ctx context.Context, decoder *gob.Decoder, encoder *gob.Encoder) error {
var request git2go.RevertCommand
if err := decoder.Decode(&request); err != nil {
return err
}
commitID, err := cmd.revert(ctx, &request)
return encoder.Encode(git2go.Result{
CommitID: commitID,
Err: git2go.SerializableError(err),
})
}
func (cmd *revertSubcommand) verify(ctx context.Context, r *git2go.RevertCommand) error {
if r.Repository == "" {
return errors.New("missing repository")
}
if r.AuthorName == "" {
return errors.New("missing author name")
}
if r.AuthorMail == "" {
return errors.New("missing author mail")
}
if r.Message == "" {
return errors.New("missing message")
}
if r.Ours == "" {
return errors.New("missing ours")
}
if r.Revert == "" {
return errors.New("missing revert")
}
return nil
}
func (cmd *revertSubcommand) revert(ctx context.Context, request *git2go.RevertCommand) (string, error) {
if err := cmd.verify(ctx, request); err != nil {
return "", err
}
repo, err := git2goutil.OpenRepository(request.Repository)
if err != nil {
return "", fmt.Errorf("open repository: %w", err)
}
defer repo.Free()
ours, err := lookupCommit(repo, request.Ours)
if err != nil {
return "", fmt.Errorf("ours commit lookup: %w", err)
}
revert, err := lookupCommit(repo, request.Revert)
if err != nil {
return "", fmt.Errorf("revert commit lookup: %w", err)
}
index, err := repo.RevertCommit(revert, ours, request.Mainline, nil)
if err != nil {
return "", fmt.Errorf("revert: %w", err)
}
defer index.Free()
if index.HasConflicts() {
return "", git2go.HasConflictsError{}
}
treeOID, err := index.WriteTreeTo(repo)
if err != nil {
return "", fmt.Errorf("write tree: %w", err)
}
tree, err := repo.LookupTree(treeOID)
if err != nil {
return "", fmt.Errorf("lookup tree: %w", err)
}
if treeOID.Equal(ours.TreeId()) {
return "", git2go.EmptyError{}
}
committer := git.Signature(git2go.NewSignature(request.AuthorName, request.AuthorMail, request.AuthorDate))
commitID, err := git2goutil.NewCommitSubmitter(repo, request.SigningKey).
Commit(&committer, &committer, git.MessageEncodingUTF8, request.Message, tree, ours)
if err != nil {
return "", fmt.Errorf("create commit: %w", err)
}
return commitID.String(), nil
}
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