1 files changed, 48 insertions, 0 deletions
diff --git a/plumbing/client/common.go b/plumbing/client/common.go
new file mode 100644
index 0000000..6a99339
--- /dev/null
+++ b/plumbing/client/common.go
@@ -0,0 +1,48 @@
+// Package clients includes the implementation for diferent transport protocols
+//
+// go-git needs the packfile and the refs of the repo. The
+// `NewGitUploadPackService` function returns an object that allows to
+// download them.
+//
+// go-git supports HTTP and SSH (see `Protocols`) for downloading the packfile
+// and the refs, but you can also install your own protocols (see
+// `InstallProtocol` below).
+//
+// Each protocol has its own implementation of
+// `NewGitUploadPackService`, but you should generally not use them
+// directly, use this package's `NewGitUploadPackService` instead.
+package clients
+
+import (
+	"fmt"
+
+	"gopkg.in/src-d/go-git.v4/plumbing/client/common"
+	"gopkg.in/src-d/go-git.v4/plumbing/client/http"
+	"gopkg.in/src-d/go-git.v4/plumbing/client/ssh"
+)
+
+type GitUploadPackServiceFactory func(common.Endpoint) common.GitUploadPackService
+
+// Protocols are the protocols supported by default.
+var Protocols = map[string]GitUploadPackServiceFactory{
+	"http":  http.NewGitUploadPackService,
+	"https": http.NewGitUploadPackService,
+	"ssh":   ssh.NewGitUploadPackService,
+}
+
+// InstallProtocol adds or modifies an existing protocol.
+func InstallProtocol(scheme string, f GitUploadPackServiceFactory) {
+	Protocols[scheme] = f
+}
+
+// NewGitUploadPackService returns the appropriate upload pack service
+// among of the set of known protocols: HTTP, SSH. See `InstallProtocol`
+// to add or modify protocols.
+func NewGitUploadPackService(endpoint common.Endpoint) (common.GitUploadPackService, error) {
+	f, ok := Protocols[endpoint.Scheme]
+	if !ok {
+		return nil, fmt.Errorf("unsupported scheme %q", endpoint.Scheme)
+	}
+
+	return f(endpoint), nil
+}