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, 57 insertions, 0 deletions

diff --git a/plumbing/transport/server/loader_test.go b/plumbing/transport/server/loader_test.go
new file mode 100644
index 0000000..b4a8c37
--- /dev/null
+++ b/plumbing/transport/server/loader_test.go
@@ -0,0 +1,57 @@
+package server
+
+import (
+	"fmt"
+	"os/exec"
+	"path/filepath"
+
+	"gopkg.in/src-d/go-git.v4/plumbing/transport"
+
+	. "gopkg.in/check.v1"
+)
+
+type LoaderSuite struct {
+	RepoPath string
+}
+
+var _ = Suite(&LoaderSuite{})
+
+func (s *LoaderSuite) SetUpSuite(c *C) {
+	if err := exec.Command("git", "--version").Run(); err != nil {
+		c.Skip("git command not found")
+	}
+
+	dir := c.MkDir()
+	s.RepoPath = filepath.Join(dir, "repo.git")
+	c.Assert(exec.Command("git", "init", "--bare", s.RepoPath).Run(), IsNil)
+}
+
+func (s *LoaderSuite) endpoint(c *C, url string) transport.Endpoint {
+	ep, err := transport.NewEndpoint(url)
+	c.Assert(err, IsNil)
+	return ep
+}
+
+func (s *LoaderSuite) TestLoadNonExistent(c *C) {
+	sto, err := DefaultLoader.Load(s.endpoint(c, "file:///does-not-exist"))
+	c.Assert(err, Equals, transport.ErrRepositoryNotFound)
+	c.Assert(sto, IsNil)
+}
+
+func (s *LoaderSuite) TestLoadNonExistentIgnoreHost(c *C) {
+	sto, err := DefaultLoader.Load(s.endpoint(c, "https://github.com/does-not-exist"))
+	c.Assert(err, Equals, transport.ErrRepositoryNotFound)
+	c.Assert(sto, IsNil)
+}
+
+func (s *LoaderSuite) TestLoad(c *C) {
+	sto, err := DefaultLoader.Load(s.endpoint(c, fmt.Sprintf("file://%s", s.RepoPath)))
+	c.Assert(err, IsNil)
+	c.Assert(sto, NotNil)
+}
+
+func (s *LoaderSuite) TestLoadIgnoreHost(c *C) {
+	sto, err := DefaultLoader.Load(s.endpoint(c, fmt.Sprintf("file://%s", s.RepoPath)))
+	c.Assert(err, IsNil)
+	c.Assert(sto, NotNil)
+}