testserver: add Git server

go.mod

@@ -8,6 +8,7 @@ require (
 	github.com/go-logr/logr v0.1.0
 	github.com/onsi/ginkgo v1.11.0
 	github.com/onsi/gomega v1.8.1
+	github.com/sosedoff/gitkit v0.2.1-0.20191202022816-7182d43c6254
 	golang.org/x/crypto v0.0.0-20200302210943-78000ba7a073
 	helm.sh/helm/v3 v3.1.2
 	k8s.io/api v0.17.2
@@ -17,3 +18,7 @@ require (
 	sigs.k8s.io/controller-runtime v0.5.0
 	sigs.k8s.io/yaml v1.1.0
 )
+
+// TODO(hidde): drop when PR is accepted:
+//  https://github.com/sosedoff/gitkit/pull/21
+replace github.com/sosedoff/gitkit => github.com/hiddeco/gitkit v0.2.1-0.20200422093229-4355fec70348

go.sum

@@ -301,6 +301,8 @@ github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ
 github.com/hashicorp/golang-lru v0.5.1 h1:0hERBMJE1eitiLkihrMvRVBYAkpHzc/J3QdDN+dAcgU=
 github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
 github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
+github.com/hiddeco/gitkit v0.2.1-0.20200422093229-4355fec70348 h1:m5YZOS7599S/K4swKGL4cDHbo2zqNhZKU2Z1leL7vuY=
+github.com/hiddeco/gitkit v0.2.1-0.20200422093229-4355fec70348/go.mod h1:CrGdGLdRnoHSdSLqDVwmNbgUD5BmyapU+w3Z9r+s8xY=
 github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
 github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
 github.com/huandu/xstrings v1.2.0 h1:yPeWdRnmynF7p+lLYz0H2tthW9lqhMJrQV/U7yy4wX0=
@@ -451,6 +453,7 @@ github.com/remyoudompheng/bigfft v0.0.0-20170806203942-52369c62f446/go.mod h1:uY
 github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6SoW27p1b0cqNHllgS5HIMJraePCO15w5zCzIWYg=
 github.com/russross/blackfriday v1.5.2 h1:HyvC0ARfnZBqnXwABFeSZHpKvJHJJfPz81GNueLj0oo=
 github.com/russross/blackfriday v1.5.2/go.mod h1:JO/DiYxRf+HjHt06OyowR9PTA263kcR/rfWxYHBV53g=
+github.com/satori/go.uuid v1.2.0 h1:0uYX9dsZ2yD7q2RtLRtPSdGDWzjeM3TbMJP9utgA0ww=
 github.com/satori/go.uuid v1.2.0/go.mod h1:dA0hQrYB0VpLJoorglMZABFdXlWrHn1NEOzdhQKdks0=
 github.com/sergi/go-diff v1.0.0/go.mod h1:0CfEIISq7TuYL3j771MWULgwwjU+GofnZX9QAmXWZgo=
 github.com/sergi/go-diff v1.1.0 h1:we8PVUC3FE2uYfodKH/nBHMSetSfHDR6scGdBi+erh0=

internal/testserver/git.go

@@ -0,0 +1,112 @@
+/*
+Copyright 2020 The Flux CD contributors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package testserver
+
+import (
+	"io/ioutil"
+	"net/http/httptest"
+	"path/filepath"
+
+	"github.com/sosedoff/gitkit"
+)
+
+// NewTempGitServer returns a GitServer with a newly created temp
+// dir as repository docroot.
+func NewTempGitServer() (*GitServer, error) {
+	tmpDir, err := ioutil.TempDir("", "git-server-test-")
+	if err != nil {
+		return nil, err
+	}
+	srv := NewGitServer(tmpDir)
+	return srv, nil
+}
+
+// NewGitServer returns a GitServer with the given repository docroot
+// set.
+func NewGitServer(docroot string) *GitServer {
+	root, err := filepath.Abs(docroot)
+	if err != nil {
+		panic(err)
+	}
+	return &GitServer{
+		config: gitkit.Config{Dir: root},
+	}
+}
+
+// GitServer is a git server for testing purposes.
+// It can serve git repositories over HTTP and SSH.
+type GitServer struct {
+	config     gitkit.Config
+	httpServer *httptest.Server
+	sshServer  *gitkit.SSH
+}
+
+// StartHTTP starts a new HTTP git server with the current configuration.
+func (s *GitServer) StartHTTP() error {
+	s.StopHTTP()
+	service := gitkit.New(s.config)
+	if err := service.Setup(); err != nil {
+		return err
+	}
+	s.httpServer = httptest.NewServer(service)
+	return nil
+}
+
+// StopHTTP stops the HTTP git server.
+func (s *GitServer) StopHTTP() {
+	if s.httpServer != nil {
+		s.httpServer.Close()
+	}
+	return
+}
+
+// StartSSH starts a new SSH git server with the current configuration.
+func (s *GitServer) StartSSH() error {
+	_ = s.StopSSH()
+	s.sshServer = gitkit.NewSSH(s.config)
+	// :0 should result in an OS assigned free port
+	return s.sshServer.ListenAndServe(":0")
+}
+
+// StopSSH stops the SSH git server.
+func (s *GitServer) StopSSH() error {
+	if s.sshServer != nil {
+		return s.sshServer.Stop()
+	}
+	return nil
+}
+
+// Root returns the repositories root directory.
+func (s *GitServer) Root() string {
+	return s.config.Dir
+}
+
+// HTTPAddress returns the address of the HTTP git server.
+func (s *GitServer) HTTPAddress() string {
+	if s.httpServer != nil {
+		return s.httpServer.URL
+	}
+	return ""
+}
+
+// SSHAddress returns the address of the SSH git server.
+func (s *GitServer) SSHAddress() string {
+	if s.sshServer != nil {
+		return s.sshServer.Address()
+	}
+	return ""
+}