/
testing_repo.go
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/
testing_repo.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 (
"archive/tar"
"context"
"io"
"net"
"os"
"path/filepath"
"strings"
"sync"
"testing"
"github.com/GoogleContainerTools/kpt/porch/repository/pkg/repository"
gogit "github.com/go-git/go-git/v5"
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/plumbing/object"
)
func TestDataAbs(t *testing.T, rel string) string {
testdata, err := filepath.Abs(rel)
if err != nil {
t.Fatalf("Failed to find testdata: %v", err)
}
return testdata
}
func OpenGitRepositoryFromArchive(t *testing.T, tarfile, tempdir string) *gogit.Repository {
extractTar(t, tarfile, tempdir)
git, err := gogit.PlainOpen(filepath.Join(tempdir, ".git"))
if err != nil {
t.Fatalf("Failed to open Git Repository extracted from %q: %v", tarfile, err)
}
return git
}
func OpenGitRepositoryFromArchiveWithWorktree(t *testing.T, tarfile, path string) *gogit.Repository {
extractTar(t, tarfile, path)
repo, err := gogit.PlainOpen(path)
if err != nil {
t.Fatalf("Failed to open Git repository extracted from %q: %v", tarfile, err)
}
return repo
}
func InitEmptyRepositoryWithWorktree(t *testing.T, path string) *gogit.Repository {
repo, err := gogit.PlainInit(path, false)
if err != nil {
t.Fatalf("Failed to initialize empty Git repository: %v", err)
}
if err := initializeDefaultBranches(repo); err != nil {
t.Fatalf("Failed to remove default branches")
}
return repo
}
func ServeGitRepository(t *testing.T, tarfile, tempdir string) (*gogit.Repository, string) {
git := OpenGitRepositoryFromArchive(t, tarfile, tempdir)
server, err := NewGitServer(git)
if err != nil {
t.Fatalf("NewGitServer() failed: %v", err)
}
var wg sync.WaitGroup
serverAddressChannel := make(chan net.Addr)
ctx, cancel := context.WithCancel(context.Background())
t.Cleanup(func() {
cancel()
wg.Wait()
})
wg.Add(1)
go func() {
defer wg.Done()
if err := server.ListenAndServe(ctx, "127.0.0.1:0", serverAddressChannel); err != nil {
if ctx.Err() == nil {
t.Errorf("Git Server ListenAndServe failed: %v", err)
}
}
}()
address, ok := <-serverAddressChannel
if !ok {
t.Fatalf("Git Server failed to start")
}
return git, "http://" + address.String()
}
func extractTar(t *testing.T, tarfile string, dir string) {
reader, err := os.Open(tarfile)
if err != nil {
t.Fatalf("Open(%q) failed: %v", tarfile, err)
}
defer reader.Close()
tr := tar.NewReader(reader)
for {
hdr, err := tr.Next()
if err == io.EOF {
break
}
if err != nil {
t.Fatalf("Reading tar file %q failed: %v", tarfile, err)
}
if hdr.FileInfo().IsDir() {
path := filepath.Join(dir, hdr.Name)
if err := os.MkdirAll(path, 0755); err != nil {
t.Fatalf("MkdirAll(%q) failed: %v", path, err)
}
continue
}
path := filepath.Join(dir, filepath.Dir(hdr.Name))
if err := os.MkdirAll(path, 0755); err != nil {
t.Fatalf("MkdirAll(%q) failed: %v", path, err)
}
path = filepath.Join(dir, hdr.Name)
saveToFile(t, path, tr)
}
}
func saveToFile(t *testing.T, path string, src io.Reader) {
dst, err := os.Create(path)
if err != nil {
t.Fatalf("Create(%q) failed; %v", path, err)
}
defer dst.Close()
if _, err := io.Copy(dst, src); err != nil {
t.Fatalf("Copy from tar to %q failed: %v", path, err)
}
}
func resolveReference(t *testing.T, repo *gogit.Repository, name plumbing.ReferenceName) *plumbing.Reference {
ref, err := repo.Reference(name, true)
if err != nil {
t.Fatalf("Failed to resolve %q: %v", name, err)
}
return ref
}
func getCommitObject(t *testing.T, repo *gogit.Repository, hash plumbing.Hash) *object.Commit {
commit, err := repo.CommitObject(hash)
if err != nil {
t.Fatalf("Failed to find commit object for %q: %v", hash, err)
}
return commit
}
func getCommitTree(t *testing.T, repo *gogit.Repository, hash plumbing.Hash) *object.Tree {
commit := getCommitObject(t, repo, hash)
tree, err := commit.Tree()
if err != nil {
t.Fatalf("Failed to get tree from commit %q: %v", hash, err)
}
return tree
}
func findTreeEntry(t *testing.T, tree *object.Tree, path string) *object.TreeEntry {
entry, err := tree.FindEntry(path)
if err != nil {
t.Fatalf("Failed to find path %q in tree %q: %v", path, tree.Hash, err)
}
return entry
}
func findFile(t *testing.T, tree *object.Tree, path string) *object.File {
file, err := tree.File(path)
if err != nil {
t.Fatalf("Failed to find file %q under the root commit tree %q: %v", path, tree.Hash, err)
}
return file
}
func findPackage(t *testing.T, revisions []repository.PackageRevision, name string) repository.PackageRevision {
for _, r := range revisions {
if r.Name() == name {
return r
}
}
names := make([]string, len(revisions))
for _, r := range revisions {
names = append(names, r.Name())
}
t.Fatalf("PackageRevision %q not found among %s", name, strings.Join(names, ","))
return nil
}
func refMustExist(t *testing.T, repo *gogit.Repository, name plumbing.ReferenceName) {
switch _, err := repo.Reference(name, false); err {
case nil:
// ok
case plumbing.ErrReferenceNotFound:
t.Fatalf("Reference %s must exist but was not found: %v", name, err)
default:
t.Fatalf("Unexpected error resolving reference %q: %v", name, err)
}
}
func refMustNotExist(t *testing.T, repo *gogit.Repository, name plumbing.ReferenceName) {
switch ref, err := repo.Reference(name, false); err {
case nil:
t.Fatalf("Reference %s must not exist but was found: %s", name, ref)
case plumbing.ErrReferenceNotFound:
// ok
default:
t.Fatalf("Unexpected error resolving reference %q: %v", name, err)
}
}
func forEachRef(t *testing.T, repo *gogit.Repository, fn func(*plumbing.Reference) error) {
refs, err := repo.References()
if err != nil {
t.Fatalf("Failed to create references iterator: %v", err)
}
if err := refs.ForEach(fn); err != nil {
t.Fatalf("References.ForEach faile: %v", err)
}
}
func logRefs(t *testing.T, repo *gogit.Repository, logPrefix string) {
forEachRef(t, repo, func(ref *plumbing.Reference) error {
t.Logf("%s%s", logPrefix, ref)
return nil
})
}