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|
//go:build static && system_libgit2
package main
import (
"context"
"encoding/gob"
"flag"
"fmt"
"time"
git "github.com/libgit2/git2go/v33"
"gitlab.com/gitlab-org/gitaly/v15/cmd/gitaly-git2go/git2goutil"
"gitlab.com/gitlab-org/gitaly/v15/internal/git2go"
)
type submoduleSubcommand struct{}
func (cmd *submoduleSubcommand) Flags() *flag.FlagSet {
return flag.NewFlagSet("submodule", flag.ExitOnError)
}
func (cmd *submoduleSubcommand) Run(_ context.Context, decoder *gob.Decoder, encoder *gob.Encoder) error {
var request git2go.SubmoduleCommand
if err := decoder.Decode(&request); err != nil {
return fmt.Errorf("deserializing submodule command request: %w", err)
}
res, err := cmd.run(request)
if err != nil {
return err
}
return encoder.Encode(res)
}
func (cmd *submoduleSubcommand) run(request git2go.SubmoduleCommand) (*git2go.SubmoduleResult, error) {
if request.AuthorDate.IsZero() {
request.AuthorDate = time.Now()
}
smCommitOID, err := git.NewOid(request.CommitSHA)
if err != nil {
return nil, fmt.Errorf("converting %s to OID: %w", request.CommitSHA, err)
}
repo, err := git2goutil.OpenRepository(request.Repository)
if err != nil {
return nil, fmt.Errorf("open repository: %w", err)
}
fullBranchRefName := "refs/heads/" + request.Branch
o, err := repo.RevparseSingle(fullBranchRefName)
if err != nil {
return nil, fmt.Errorf("%s: %w", git2go.LegacyErrPrefixInvalidBranch, err)
}
startCommit, err := o.AsCommit()
if err != nil {
return nil, fmt.Errorf("peeling %s as a commit: %w", o.Id(), err)
}
rootTree, err := startCommit.Tree()
if err != nil {
return nil, fmt.Errorf("root tree from starting commit: %w", err)
}
index, err := git.NewIndex()
if err != nil {
return nil, fmt.Errorf("creating new index: %w", err)
}
if err := index.ReadTree(rootTree); err != nil {
return nil, fmt.Errorf("reading root tree into index: %w", err)
}
smEntry, err := index.EntryByPath(request.Submodule, 0)
if err != nil {
return nil, fmt.Errorf(
"%s: %w",
git2go.LegacyErrPrefixInvalidSubmodulePath, err,
)
}
if smEntry.Id.Cmp(smCommitOID) == 0 {
//nolint
return nil, fmt.Errorf(
"The submodule %s is already at %s",
request.Submodule, request.CommitSHA,
)
}
if smEntry.Mode != git.FilemodeCommit {
return nil, fmt.Errorf(
"%s: %w",
git2go.LegacyErrPrefixInvalidSubmodulePath, err,
)
}
newEntry := *smEntry // copy by value
newEntry.Id = smCommitOID // assign new commit SHA
if err := index.Add(&newEntry); err != nil {
return nil, fmt.Errorf("add new submodule entry to index: %w", err)
}
newRootTreeOID, err := index.WriteTreeTo(repo)
if err != nil {
return nil, fmt.Errorf("write index to repo: %w", err)
}
newTree, err := repo.LookupTree(newRootTreeOID)
if err != nil {
return nil, fmt.Errorf("looking up new submodule entry root tree: %w", err)
}
committer := git.Signature(
git2go.NewSignature(
request.AuthorName,
request.AuthorMail,
request.AuthorDate,
),
)
newCommitOID, err := repo.CreateCommit(
"", // caller should update branch with hooks
&committer,
&committer,
request.Message,
newTree,
startCommit,
)
if err != nil {
return nil, fmt.Errorf(
"%s: %w",
git2go.LegacyErrPrefixFailedCommit, err,
)
}
return &git2go.SubmoduleResult{
CommitID: newCommitOID.String(),
}, nil
}
|
