transport: create Client interface (#132)

* plumbing: move plumbing/client package to plumbing/transport.

* transport: create Client interface.

* A Client can instantiate any client transport service.
* InstallProtocol installs a Client for a given protocol,
  instead of just a UploadPackService.
* A Client can open a session for fetch-pack or send-pack
  for a specific Endpoint.
* Adapt ssh and http clients to the new client interface.

* updated doc

1 files changed, 0 insertions, 76 deletions

diff --git a/plumbing/client/http/common.go b/plumbing/client/http/common.go
deleted file mode 100644
index 2447995..0000000
--- a/plumbing/client/http/common.go
+++ /dev/null
@@ -1,76 +0,0 @@
-// Package http implements a HTTP client for go-git.
-package http
-
-import (
-	"fmt"
-	"net/http"
-
-	"gopkg.in/src-d/go-git.v4/plumbing"
-	"gopkg.in/src-d/go-git.v4/plumbing/client/common"
-)
-
-// AuthMethod is concrete implementation of common.AuthMethod for HTTP services
-type AuthMethod interface {
-	common.AuthMethod
-	setAuth(r *http.Request)
-}
-
-// BasicAuth represent a HTTP basic auth
-type BasicAuth struct {
-	username, password string
-}
-
-// NewBasicAuth returns a BasicAuth base on the given user and password
-func NewBasicAuth(username, password string) *BasicAuth {
-	return &BasicAuth{username, password}
-}
-
-func (a *BasicAuth) setAuth(r *http.Request) {
-	r.SetBasicAuth(a.username, a.password)
-}
-
-// Name is name of the auth
-func (a *BasicAuth) Name() string {
-	return "http-basic-auth"
-}
-
-func (a *BasicAuth) String() string {
-	masked := "*******"
-	if a.password == "" {
-		masked = "<empty>"
-	}
-
-	return fmt.Sprintf("%s - %s:%s", a.Name(), a.username, masked)
-}
-
-// Err is a dedicated error to return errors based on status code
-type Err struct {
-	Response *http.Response
-}
-
-// NewErr returns a new Err based on a http response
-func NewErr(r *http.Response) error {
-	if r.StatusCode >= http.StatusOK && r.StatusCode < http.StatusMultipleChoices {
-		return nil
-	}
-
-	switch r.StatusCode {
-	case http.StatusUnauthorized:
-		return common.ErrAuthorizationRequired
-	case http.StatusNotFound:
-		return common.ErrRepositoryNotFound
-	}
-
-	return plumbing.NewUnexpectedError(&Err{r})
-}
-
-// StatusCode returns the status code of the response
-func (e *Err) StatusCode() int {
-	return e.Response.StatusCode
-}
-
-func (e *Err) Error() string {
-	return fmt.Sprintf("unexpected requesting %q status code: %d",
-		e.Response.Request.URL, e.Response.StatusCode,
-	)
-}