diff --git a/README.md b/README.md index 11810df..a645c54 100644 --- a/README.md +++ b/README.md @@ -8,7 +8,8 @@ utilising the power of Go. ## Dependencies -- Git >= 1.7 +- Go >= 1.25 to build or embed the server +- Native Git for HTTP push/fetch; repository creation uses go-git in-process ## Install @@ -74,6 +75,33 @@ func main() { } ``` +## Repository creation + +Use an instance with a storage implementation to create and serve repositories: + +```go +store := server.NewFilesystemStore("/srv/git") +srv := server.New(server.DefaultConfig, store) + +repo, err := srv.CreateRepository(context.Background(), "team/example.git") +if err != nil { + log.Fatal(err) +} +log.Printf("Created %s", repo.Path()) +log.Fatal(http.ListenAndServe(":8080", srv)) +``` + +`CreateRepository` allocates storage and initializes a bare repository using +go-git, without invoking Git. If initialization fails, it attempts to delete the +allocated storage and reports any cleanup error. `Store.Create` alone only +allocates storage; it does not initialize Git. Filesystem repository names must +end in `.git` and may include namespaces such as `team/example.git`. + +Custom stores implement `Open`, `Create`, `Delete`, `Exists`, and `List`. +Repositories currently expose a local filesystem `Path()`, which both go-git +initialization and native Git HTTP operations use. Remote object storage is not +yet supported directly by this interface. + ## License ``` diff --git a/go.mod b/go.mod index df838eb..c1d4ad2 100644 --- a/go.mod +++ b/go.mod @@ -1,3 +1,28 @@ module github.com/asim/git-http-backend -go 1.20 +go 1.25.0 + +require github.com/go-git/go-git/v5 v5.19.2 + +require ( + dario.cat/mergo v1.0.0 // indirect + github.com/Microsoft/go-winio v0.6.2 // indirect + github.com/ProtonMail/go-crypto v1.1.6 // indirect + github.com/cloudflare/circl v1.6.3 // indirect + github.com/cyphar/filepath-securejoin v0.6.1 // indirect + github.com/emirpasic/gods v1.18.1 // indirect + github.com/go-git/gcfg v1.5.1-0.20230307220236-3a3c6141e376 // indirect + github.com/go-git/go-billy/v5 v5.9.0 // indirect + github.com/golang/groupcache v0.0.0-20241129210726-2c02b8208cf8 // indirect + github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 // indirect + github.com/kevinburke/ssh_config v1.2.0 // indirect + github.com/klauspost/cpuid/v2 v2.3.0 // indirect + github.com/pjbgf/sha1cd v0.6.0 // indirect + github.com/sergi/go-diff v1.3.2-0.20230802210424-5b0b94c5c0d3 // indirect + github.com/skeema/knownhosts v1.3.1 // indirect + github.com/xanzy/ssh-agent v0.3.3 // indirect + golang.org/x/crypto v0.53.0 // indirect + golang.org/x/net v0.56.0 // indirect + golang.org/x/sys v0.46.0 // indirect + gopkg.in/warnings.v0 v0.1.2 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..88ca7c4 --- /dev/null +++ b/go.sum @@ -0,0 +1,104 @@ +dario.cat/mergo v1.0.0 h1:AGCNq9Evsj31mOgNPcLyXc+4PNABt905YmuqPYYpBWk= +dario.cat/mergo v1.0.0/go.mod h1:uNxQE+84aUszobStD9th8a29P2fMDhsBdgRYvZOxGmk= +github.com/Microsoft/go-winio v0.5.2/go.mod h1:WpS1mjBmmwHBEWmogvA2mj8546UReBk4v8QkMxJ6pZY= +github.com/Microsoft/go-winio v0.6.2 h1:F2VQgta7ecxGYO8k3ZZz3RS8fVIXVxONVUPlNERoyfY= +github.com/Microsoft/go-winio v0.6.2/go.mod h1:yd8OoFMLzJbo9gZq8j5qaps8bJ9aShtEA8Ipt1oGCvU= +github.com/ProtonMail/go-crypto v1.1.6 h1:ZcV+Ropw6Qn0AX9brlQLAUXfqLBc7Bl+f/DmNxpLfdw= +github.com/ProtonMail/go-crypto v1.1.6/go.mod h1:rA3QumHc/FZ8pAHreoekgiAbzpNsfQAosU5td4SnOrE= +github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be h1:9AeTilPcZAjCFIImctFaOjnTIavg87rW78vTPkQqLI8= +github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be/go.mod h1:ySMOLuWl6zY27l47sB3qLNK6tF2fkHG55UZxx8oIVo4= +github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5 h1:0CwZNZbxp69SHPdPJAN/hZIm0C4OItdklCFmMRWYpio= +github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5/go.mod h1:wHh0iHkYZB8zMSxRWpUBQtwG5a7fFgvEO+odwuTv2gs= +github.com/cloudflare/circl v1.6.3 h1:9GPOhQGF9MCYUeXyMYlqTR6a5gTrgR/fBLXvUgtVcg8= +github.com/cloudflare/circl v1.6.3/go.mod h1:2eXP6Qfat4O/Yhh8BznvKnJ+uzEoTQ6jVKJRn81BiS4= +github.com/cyphar/filepath-securejoin v0.6.1 h1:5CeZ1jPXEiYt3+Z6zqprSAgSWiggmpVyciv8syjIpVE= +github.com/cyphar/filepath-securejoin v0.6.1/go.mod h1:A8hd4EnAeyujCJRrICiOWqjS1AX0a9kM5XL+NwKoYSc= +github.com/davecgh/go-spew 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+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ= +gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= +gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= diff --git a/server/repository.go b/server/repository.go new file mode 100644 index 0000000..0518154 --- /dev/null +++ b/server/repository.go @@ -0,0 +1,25 @@ +package server + +import ( + "context" + "fmt" + + git "github.com/go-git/go-git/v5" +) + +// CreateRepository allocates repository storage and initializes it as a bare Git repository. +func (s *Server) CreateRepository(ctx context.Context, name string) (Repository, error) { + repo, err := s.Store.Create(ctx, name) + if err != nil { + return nil, err + } + + if _, err := git.PlainInit(repo.Path(), true); err != nil { + if cleanupErr := s.Store.Delete(context.Background(), name); cleanupErr != nil { + return nil, fmt.Errorf("initialize bare repository: %w; cleanup failed: %v", err, cleanupErr) + } + return nil, fmt.Errorf("initialize bare repository: %w", err) + } + + return repo, nil +} diff --git a/server/repository_test.go b/server/repository_test.go new file mode 100644 index 0000000..2842534 --- /dev/null +++ b/server/repository_test.go @@ -0,0 +1,181 @@ +package server + +import ( + "context" + "errors" + "net/http/httptest" + "os" + "os/exec" + "path/filepath" + "strings" + "testing" + "time" + + git "github.com/go-git/go-git/v5" +) + +func TestCreateRepositoryInitializesBareRepository(t *testing.T) { + ctx := context.Background() + store := NewFilesystemStore(t.TempDir()) + srv := New(Config{}, store) + + repo, err := srv.CreateRepository(ctx, "team/example.git") + if err != nil { + t.Fatal(err) + } + + opened, err := git.PlainOpen(repo.Path()) + if err != nil { + t.Fatalf("open created repository: %v", err) + } + if _, err := opened.Worktree(); !errors.Is(err, git.ErrIsBareRepository) { + t.Fatalf("expected bare repository, got %v", err) + } + + if _, err := os.Stat(filepath.Join(repo.Path(), "HEAD")); err != nil { + t.Fatalf("expected bare repository HEAD: %v", err) + } +} + +type failingCreateStore struct { + path string + deleted bool + deleteErr error +} + +func (s *failingCreateStore) Open(context.Context, string) (Repository, error) { + return nil, ErrRepositoryNotFound +} + +func (s *failingCreateStore) Create(context.Context, string) (Repository, error) { + return testRepository(s.path), nil +} + +func (s *failingCreateStore) Delete(context.Context, string) error { + s.deleted = true + return s.deleteErr +} + +func (s *failingCreateStore) Exists(context.Context, string) (bool, error) { return false, nil } +func (s *failingCreateStore) List(context.Context) ([]string, error) { return nil, nil } + +func TestCreateRepositoryCleansUpOnInitFailure(t *testing.T) { + path := filepath.Join(t.TempDir(), "not-a-directory") + if err := os.WriteFile(path, []byte("x"), 0600); err != nil { + t.Fatal(err) + } + + store := &failingCreateStore{path: path} + srv := New(Config{}, store) + + _, err := srv.CreateRepository(context.Background(), "example.git") + if err == nil { + t.Fatal("expected repository initialization to fail") + } + if !store.deleted { + t.Fatal("expected allocated repository to be deleted after init failure") + } +} + +func TestCreateRepositoryPreservesStoreError(t *testing.T) { + want := errors.New("storage unavailable") + store := &repositoryCreateErrorStore{err: want} + srv := New(Config{}, store) + + _, err := srv.CreateRepository(context.Background(), "example.git") + if !errors.Is(err, want) { + t.Fatalf("expected %v, got %v", want, err) + } +} + +type repositoryCreateErrorStore struct{ err error } + +func (s *repositoryCreateErrorStore) Open(context.Context, string) (Repository, error) { + return nil, ErrRepositoryNotFound +} +func (s *repositoryCreateErrorStore) Create(context.Context, string) (Repository, error) { + return nil, s.err +} +func (s *repositoryCreateErrorStore) Delete(context.Context, string) error { return nil } +func (s *repositoryCreateErrorStore) Exists(context.Context, string) (bool, error) { return false, nil } +func (s *repositoryCreateErrorStore) List(context.Context) ([]string, error) { return nil, nil } + +func TestCreateRepositoryNativeHTTPPushAndClone(t *testing.T) { + gitBin, err := exec.LookPath("git") + if err != nil { + t.Skip("native git is required for HTTP integration test") + } + config := DefaultConfig + config.GitBinPath = gitBin + srv := New(config, NewFilesystemStore(t.TempDir())) + if _, err := srv.CreateRepository(context.Background(), "team/example.git"); err != nil { + t.Fatal(err) + } + httpServer := httptest.NewServer(srv) + defer httpServer.Close() + + run := func(dir string, args ...string) string { + t.Helper() + ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second) + defer cancel() + cmd := exec.CommandContext(ctx, gitBin, args...) + cmd.Dir = dir + cmd.Env = append(os.Environ(), "GIT_CONFIG_NOSYSTEM=1", "GIT_CONFIG_GLOBAL="+os.DevNull, "GIT_TERMINAL_PROMPT=0") + out, err := cmd.CombinedOutput() + if err != nil { + t.Fatalf("git %v: %v\n%s", args, err, out) + } + return strings.TrimSpace(string(out)) + } + source := t.TempDir() + run(source, "init") + run(source, "symbolic-ref", "HEAD", "refs/heads/master") + if err := os.WriteFile(filepath.Join(source, "hello.txt"), []byte("hello from native git\n"), 0600); err != nil { + t.Fatal(err) + } + run(source, "add", "hello.txt") + run(source, "-c", "user.name=Test", "-c", "user.email=test@example.com", "-c", "commit.gpgsign=false", "commit", "-m", "initial commit") + url := httpServer.URL + "/team/example.git" + run(source, "push", url, "master") + clone := filepath.Join(t.TempDir(), "clone") + run(source, "clone", url, clone) + if got, want := run(clone, "rev-parse", "HEAD"), run(source, "rev-parse", "HEAD"); got != want { + t.Fatalf("cloned commit = %s, want %s", got, want) + } + contents, err := os.ReadFile(filepath.Join(clone, "hello.txt")) + if err != nil || string(contents) != "hello from native git\n" { + t.Fatalf("cloned file = %q, error = %v", contents, err) + } +} + +func TestCreateRepositoryReportsCleanupFailure(t *testing.T) { + path := filepath.Join(t.TempDir(), "not-a-directory") + if err := os.WriteFile(path, []byte("x"), 0600); err != nil { + t.Fatal(err) + } + store := &failingCreateStore{path: path, deleteErr: errors.New("delete unavailable")} + _, err := New(Config{}, store).CreateRepository(context.Background(), "example.git") + if err == nil || !strings.Contains(err.Error(), "cleanup failed: delete unavailable") { + t.Fatalf("expected initialization and cleanup failure, got %v", err) + } + var pathErr *os.PathError + if !errors.As(err, &pathErr) { + t.Fatalf("initialization error not preserved: %v", err) + } +} + +func TestCreateRepositoryDoesNotDeleteExistingRepository(t *testing.T) { + store := NewFilesystemStore(t.TempDir()) + srv := New(Config{}, store) + repo, err := srv.CreateRepository(context.Background(), "example.git") + if err != nil { + t.Fatal(err) + } + _, err = srv.CreateRepository(context.Background(), "example.git") + if !errors.Is(err, ErrRepositoryExists) { + t.Fatalf("expected existing repository error, got %v", err) + } + if _, err := git.PlainOpen(repo.Path()); err != nil { + t.Fatalf("existing repository damaged: %v", err) + } +}