server: add git server implementation (#190)

* server: add generic server implementation (transport-independent),
  both for git-upload-pack and git-receive-pack.
* server: move internal functions to internal/common.
* cli: add git-receive-pack and git-upload-pack implementations.
* format/packfile: add UpdateObjectStorage function, extracted from
  Remote.
* transport: implement tranport RPC-like, only with git-upload-pack and
  git-receive-pack methods. Client renamed to Transport.
* storer: add storer.Storer interface.
* protocol/packp: add UploadPackResponse constructor with packfile.
* protocol/packp: fix UploadPackResponse encoding, add tests.
* protocol/packp/capability: implement All.

1 files changed, 40 insertions, 0 deletions

diff --git a/plumbing/transport/file/client_test.go b/plumbing/transport/file/client_test.go
new file mode 100644
index 0000000..220df3d
--- /dev/null
+++ b/plumbing/transport/file/client_test.go
@@ -0,0 +1,40 @@
+package file
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"strings"
+	"testing"
+
+	"gopkg.in/src-d/go-git.v4/plumbing/transport"
+
+	. "gopkg.in/check.v1"
+)
+
+func Test(t *testing.T) { TestingT(t) }
+
+const bareConfig = `[core]
+repositoryformatversion = 0
+filemode = true
+bare = true`
+
+func prepareRepo(c *C, path string) transport.Endpoint {
+	url := fmt.Sprintf("file://%s", path)
+	ep, err := transport.NewEndpoint(url)
+	c.Assert(err, IsNil)
+
+	// git-receive-pack refuses to update refs/heads/master on non-bare repo
+	// so we ensure bare repo config.
+	config := fmt.Sprintf("%s/config", path)
+	if _, err := os.Stat(config); err == nil {
+		f, err := os.OpenFile(config, os.O_TRUNC|os.O_WRONLY, 0)
+		c.Assert(err, IsNil)
+		content := strings.NewReader(bareConfig)
+		_, err = io.Copy(f, content)
+		c.Assert(err, IsNil)
+		c.Assert(f.Close(), IsNil)
+	}
+
+	return ep
+}