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gogit.go
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gogit.go
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// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package git
import (
"github.com/go-git/go-billy/v5/osfs"
"github.com/go-git/go-git/v5"
"github.com/go-git/go-git/v5/config"
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/plumbing/cache"
"github.com/go-git/go-git/v5/storage/filesystem"
)
// This file contains helpers for interacting with gogit.
func initEmptyRepository(path string) (*git.Repository, error) {
isBare := true // Porch only uses bare repositories
repo, err := git.PlainInit(path, isBare)
if err != nil {
return nil, err
}
if err := initializeDefaultBranches(repo); err != nil {
return nil, err
}
return repo, nil
}
func initializeDefaultBranches(repo *git.Repository) error {
// Adjust default references
if err := repo.Storer.RemoveReference(plumbing.Master); err != nil {
return err
}
// gogit points HEAD at a wrong branch; point it at main
main := plumbing.NewSymbolicReference(plumbing.HEAD, DefaultMainReferenceName)
if err := repo.Storer.SetReference(main); err != nil {
return err
}
return nil
}
func openRepository(path string) (*git.Repository, error) {
dot := osfs.New(path)
storage := filesystem.NewStorage(dot, cache.NewObjectLRUDefault())
return git.Open(storage, dot)
}
func initializeOrigin(repo *git.Repository, address string) error {
cfg, err := repo.Config()
if err != nil {
return err
}
cfg.Remotes[OriginName] = &config.RemoteConfig{
Name: OriginName,
URLs: []string{address},
Fetch: defaultFetchSpec,
}
if err := repo.SetConfig(cfg); err != nil {
return err
}
return nil
}