Rename gitloader to gitcloner.

pkg/loader/gitcloner.go

@@ -0,0 +1,79 @@
+/*
+Copyright 2018 The Kubernetes Authors.
+
+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 loader
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/hashicorp/go-getter"
+)
+
+// gitCloner is a function that can clone a git repo.
+type gitCloner func(url string) (
+	// Directory where the repo is cloned to.
+	checkoutDir string,
+	// Relative path in the checkoutDir to location
+	// of kustomization file.
+	pathInCoDir string,
+	// Any error encountered when cloning.
+	err error)
+
+// isRepoUrl checks if a string is a repo Url
+func isRepoUrl(s string) bool {
+	if strings.HasPrefix(s, "https://") {
+		return true
+	}
+	if strings.HasPrefix(s, "git::") {
+		return true
+	}
+	host := strings.SplitN(s, "/", 2)[0]
+	return strings.Contains(host, ".com") || strings.Contains(host, ".org")
+}
+
+func makeTmpDir() (string, error) {
+	return ioutil.TempDir("", "kustomize-")
+}
+
+func hashicorpGitCloner(repoUrl string) (
+	checkoutDir string, pathInCoDir string, err error) {
+	dir, err := makeTmpDir()
+	if err != nil {
+		return
+	}
+	checkoutDir = filepath.Join(dir, "repo")
+	url, pathInCoDir := getter.SourceDirSubdir(repoUrl)
+	err = checkout(url, checkoutDir)
+	return
+}
+
+// Checkout clones a github repo with specified commit/tag/branch
+func checkout(url, dir string) error {
+	pwd, err := os.Getwd()
+	if err != nil {
+		return err
+	}
+	client := &getter.Client{
+		Src:  url,
+		Dst:  dir,
+		Pwd:  pwd,
+		Mode: getter.ClientModeDir,
+	}
+	return client.Get()
+}