transport: add local transport

fixtures/fixtures.go

@@ -115,6 +115,11 @@ var fixtures = Fixtures{{
 	Tags:         []string{"packfile", "diff-tree"},
 	URL:          "https://github.com/toqueteos/ts3.git",
 	PackfileHash: plumbing.NewHash("21b33a26eb7ffbd35261149fe5d886b9debab7cb"),
+}, {
+	Tags:         []string{"empty", ".git"},
+	URL:          "https://github.com/git-fixtures/empty.git",
+	DotGitHash:   plumbing.NewHash("4abe340d8d378baf7c2bfb2854c0fa498642bac3"),
+	ObjectsCount: 0,
 }}
 
 func All() Fixtures {

plumbing/transport/client/client.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 
 	"gopkg.in/src-d/go-git.v4/plumbing/transport"
+	"gopkg.in/src-d/go-git.v4/plumbing/transport/file"
 	"gopkg.in/src-d/go-git.v4/plumbing/transport/http"
 	"gopkg.in/src-d/go-git.v4/plumbing/transport/ssh"
 )
@@ -13,6 +14,7 @@ var Protocols = map[string]transport.Client{
 	"http":  http.DefaultClient,
 	"https": http.DefaultClient,
 	"ssh":   ssh.DefaultClient,
+	"file":  file.DefaultClient,
 }
 
 // InstallProtocol adds or modifies an existing protocol.
@@ -21,7 +23,8 @@ func InstallProtocol(scheme string, c transport.Client) {
 }
 
 // NewClient returns the appropriate client among of the set of known protocols:
-// HTTP, SSH. See `InstallProtocol` to add or modify protocols.
+// http://, https://, ssh:// and file://.
+// See `InstallProtocol` to add or modify protocols.
 func NewClient(endpoint transport.Endpoint) (transport.Client, error) {
 	f, ok := Protocols[endpoint.Scheme]
 	if !ok {

plumbing/transport/client/client_test.go

@@ -38,7 +38,7 @@ func (s *ClientSuite) TestNewClientSSH(c *C) {
 
 	output, err := NewClient(e)
 	c.Assert(err, IsNil)
-	c.Assert(typeAsString(output), Equals, "*ssh.client")
+	c.Assert(output, NotNil)
 }
 
 func (s *ClientSuite) TestNewClientUnknown(c *C) {

plumbing/transport/common.go

@@ -34,7 +34,8 @@ var (
 )
 
 const (
-	UploadPackServiceName = "git-upload-pack"
+	UploadPackServiceName  = "git-upload-pack"
+	ReceivePackServiceName = "git-receive-pack"
 )
 
 // Client can initiate git-fetch-pack and git-send-pack processes.

plumbing/transport/file/common.go

@@ -0,0 +1,72 @@
+package file
+
+import (
+	"io"
+	"os/exec"
+
+	"gopkg.in/src-d/go-git.v4/plumbing/transport"
+	"gopkg.in/src-d/go-git.v4/plumbing/transport/internal/common"
+)
+
+// DefaultClient is the default local client.
+var DefaultClient = NewClient(
+	transport.UploadPackServiceName,
+	transport.ReceivePackServiceName,
+)
+
+type runner struct {
+	UploadPackBin  string
+	ReceivePackBin string
+}
+
+// NewClient returns a new local client using the given git-upload-pack and
+// git-receive-pack binaries.
+func NewClient(uploadPackBin, receivePackBin string) transport.Client {
+	return common.NewClient(&runner{
+		UploadPackBin:  uploadPackBin,
+		ReceivePackBin: receivePackBin,
+	})
+}
+
+func (r *runner) Command(cmd string, ep transport.Endpoint) (common.Command, error) {
+	return &command{cmd: exec.Command(cmd, ep.Path)}, nil
+}
+
+type command struct {
+	cmd    *exec.Cmd
+	closed bool
+}
+
+func (c *command) SetAuth(auth transport.AuthMethod) error {
+	if auth != nil {
+		return transport.ErrInvalidAuthMethod
+	}
+
+	return nil
+}
+
+func (c *command) Start() error {
+	return c.cmd.Start()
+}
+
+func (c *command) StderrPipe() (io.Reader, error) {
+	return c.cmd.StderrPipe()
+}
+
+func (c *command) StdinPipe() (io.WriteCloser, error) {
+	return c.cmd.StdinPipe()
+}
+
+func (c *command) StdoutPipe() (io.Reader, error) {
+	return c.cmd.StdoutPipe()
+}
+
+// Close waits for the command to exit.
+func (c *command) Close() error {
+	return c.cmd.Process.Kill()
+}
+
+func (c *command) Wait() error {
+	defer func() { c.closed = true }()
+	return c.cmd.Wait()
+}

plumbing/transport/file/common_test.go

@@ -0,0 +1,9 @@
+package file
+
+import (
+	"testing"
+
+	. "gopkg.in/check.v1"
+)
+
+func Test(t *testing.T) { TestingT(t) }

plumbing/transport/file/fetch_pack_test.go

@@ -0,0 +1,48 @@
+package file
+
+import (
+	"fmt"
+	"os/exec"
+
+	"gopkg.in/src-d/go-git.v4/fixtures"
+	"gopkg.in/src-d/go-git.v4/plumbing/transport"
+	"gopkg.in/src-d/go-git.v4/plumbing/transport/test"
+
+	. "gopkg.in/check.v1"
+)
+
+type FetchPackSuite struct {
+	fixtures.Suite
+	test.FetchPackSuite
+}
+
+var _ = Suite(&FetchPackSuite{})
+
+func (s *FetchPackSuite) SetUpSuite(c *C) {
+	s.Suite.SetUpSuite(c)
+
+	if err := exec.Command("git", "--version").Run(); err != nil {
+		c.Skip("git command not found")
+	}
+
+	s.FetchPackSuite.Client = DefaultClient
+
+	fixture := fixtures.Basic().One()
+	path := fixture.DotGit().Base()
+	url := fmt.Sprintf("file://%s", path)
+	ep, err := transport.NewEndpoint(url)
+	c.Assert(err, IsNil)
+	s.Endpoint = ep
+
+	fixture = fixtures.ByTag("empty").One()
+	path = fixture.DotGit().Base()
+	url = fmt.Sprintf("file://%s", path)
+	ep, err = transport.NewEndpoint(url)
+	c.Assert(err, IsNil)
+	s.EmptyEndpoint = ep
+
+	url = fmt.Sprintf("file://%s/%s", fixtures.DataFolder, "non-existent")
+	ep, err = transport.NewEndpoint(url)
+	c.Assert(err, IsNil)
+	s.NonExistentEndpoint = ep
+}