feat(dir2config): defaults

vendor/gopkg.in/src-d/go-git.v4/plumbing/transport/file/client.go

@@ -0,0 +1,156 @@
+// Package file implements the file transport protocol.
+package file
+
+import (
+	"bufio"
+	"errors"
+	"io"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+
+	"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.Transport {
+	return common.NewClient(&runner{
+		UploadPackBin:  uploadPackBin,
+		ReceivePackBin: receivePackBin,
+	})
+}
+
+func prefixExecPath(cmd string) (string, error) {
+	// Use `git --exec-path` to find the exec path.
+	execCmd := exec.Command("git", "--exec-path")
+
+	stdout, err := execCmd.StdoutPipe()
+	if err != nil {
+		return "", err
+	}
+	stdoutBuf := bufio.NewReader(stdout)
+
+	err = execCmd.Start()
+	if err != nil {
+		return "", err
+	}
+
+	execPathBytes, isPrefix, err := stdoutBuf.ReadLine()
+	if err != nil {
+		return "", err
+	}
+	if isPrefix {
+		return "", errors.New("Couldn't read exec-path line all at once")
+	}
+
+	err = execCmd.Wait()
+	if err != nil {
+		return "", err
+	}
+	execPath := string(execPathBytes)
+	execPath = strings.TrimSpace(execPath)
+	cmd = filepath.Join(execPath, cmd)
+
+	// Make sure it actually exists.
+	_, err = exec.LookPath(cmd)
+	if err != nil {
+		return "", err
+	}
+	return cmd, nil
+}
+
+func (r *runner) Command(cmd string, ep *transport.Endpoint, auth transport.AuthMethod,
+) (common.Command, error) {
+
+	switch cmd {
+	case transport.UploadPackServiceName:
+		cmd = r.UploadPackBin
+	case transport.ReceivePackServiceName:
+		cmd = r.ReceivePackBin
+	}
+
+	_, err := exec.LookPath(cmd)
+	if err != nil {
+		if e, ok := err.(*exec.Error); ok && e.Err == exec.ErrNotFound {
+			cmd, err = prefixExecPath(cmd)
+			if err != nil {
+				return nil, err
+			}
+		} else {
+			return nil, err
+		}
+	}
+
+	return &command{cmd: exec.Command(cmd, ep.Path)}, nil
+}
+
+type command struct {
+	cmd          *exec.Cmd
+	stderrCloser io.Closer
+	closed       bool
+}
+
+func (c *command) Start() error {
+	return c.cmd.Start()
+}
+
+func (c *command) StderrPipe() (io.Reader, error) {
+	// Pipe returned by Command.StderrPipe has a race with Read + Command.Wait.
+	// We use an io.Pipe and close it after the command finishes.
+	r, w := io.Pipe()
+	c.cmd.Stderr = w
+	c.stderrCloser = r
+	return r, nil
+}
+
+func (c *command) StdinPipe() (io.WriteCloser, error) {
+	return c.cmd.StdinPipe()
+}
+
+func (c *command) StdoutPipe() (io.Reader, error) {
+	return c.cmd.StdoutPipe()
+}
+
+func (c *command) Kill() error {
+	c.cmd.Process.Kill()
+	return c.Close()
+}
+
+// Close waits for the command to exit.
+func (c *command) Close() error {
+	if c.closed {
+		return nil
+	}
+
+	defer func() {
+		c.closed = true
+		_ = c.stderrCloser.Close()
+
+	}()
+
+	err := c.cmd.Wait()
+	if _, ok := err.(*os.PathError); ok {
+		return nil
+	}
+
+	// When a repository does not exist, the command exits with code 128.
+	if _, ok := err.(*exec.ExitError); ok {
+		return nil
+	}
+
+	return err
+}

vendor/gopkg.in/src-d/go-git.v4/plumbing/transport/file/server.go

@@ -0,0 +1,53 @@
+package file
+
+import (
+	"fmt"
+	"os"
+
+	"gopkg.in/src-d/go-git.v4/plumbing/transport"
+	"gopkg.in/src-d/go-git.v4/plumbing/transport/internal/common"
+	"gopkg.in/src-d/go-git.v4/plumbing/transport/server"
+	"gopkg.in/src-d/go-git.v4/utils/ioutil"
+)
+
+// ServeUploadPack serves a git-upload-pack request using standard output, input
+// and error. This is meant to be used when implementing a git-upload-pack
+// command.
+func ServeUploadPack(path string) error {
+	ep, err := transport.NewEndpoint(path)
+	if err != nil {
+		return err
+	}
+
+	// TODO: define and implement a server-side AuthMethod
+	s, err := server.DefaultServer.NewUploadPackSession(ep, nil)
+	if err != nil {
+		return fmt.Errorf("error creating session: %s", err)
+	}
+
+	return common.ServeUploadPack(srvCmd, s)
+}
+
+// ServeReceivePack serves a git-receive-pack request using standard output,
+// input and error. This is meant to be used when implementing a
+// git-receive-pack command.
+func ServeReceivePack(path string) error {
+	ep, err := transport.NewEndpoint(path)
+	if err != nil {
+		return err
+	}
+
+	// TODO: define and implement a server-side AuthMethod
+	s, err := server.DefaultServer.NewReceivePackSession(ep, nil)
+	if err != nil {
+		return fmt.Errorf("error creating session: %s", err)
+	}
+
+	return common.ServeReceivePack(srvCmd, s)
+}
+
+var srvCmd = common.ServerCommand{
+	Stdin:  os.Stdin,
+	Stdout: ioutil.WriteNopCloser(os.Stdout),
+	Stderr: os.Stderr,
+}