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, 19 insertions, 0 deletions

diff --git a/plumbing/protocol/packp/shallowupd.go b/plumbing/protocol/packp/shallowupd.go
index 89063de..40f58e8 100644
--- a/plumbing/protocol/packp/shallowupd.go
+++ b/plumbing/protocol/packp/shallowupd.go
@@ -24,6 +24,7 @@ func (r *ShallowUpdate) Decode(reader io.Reader) error {
 
 	for s.Scan() {
 		line := s.Bytes()
+		line = bytes.TrimSpace(line)
 
 		var err error
 		switch {
@@ -71,3 +72,21 @@ func (r *ShallowUpdate) decodeLine(line, prefix []byte, expLen int) (plumbing.Ha
 	raw := string(line[expLen-40 : expLen])
 	return plumbing.NewHash(raw), nil
 }
+
+func (r *ShallowUpdate) Encode(w io.Writer) error {
+	e := pktline.NewEncoder(w)
+
+	for _, h := range r.Shallows {
+		if err := e.Encodef("%s%s\n", shallow, h.String()); err != nil {
+			return err
+		}
+	}
+
+	for _, h := range r.Unshallows {
+		if err := e.Encodef("%s%s\n", unshallow, h.String()); err != nil {
+			return err
+		}
+	}
+
+	return e.Flush()
+}