Switch to github.com/golang/dep for vendoring

Signed-off-by: Mrunal Patel <mrunalp@gmail.com>

vendor/k8s.io/kubernetes/pkg/credentialprovider/config.go

@@ -0,0 +1,295 @@
+/*
+Copyright 2014 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 credentialprovider
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync"
+
+	"github.com/golang/glog"
+)
+
+// DockerConfigJson represents ~/.docker/config.json file info
+// see https://github.com/docker/docker/pull/12009
+type DockerConfigJson struct {
+	Auths DockerConfig `json:"auths"`
+	// +optional
+	HttpHeaders map[string]string `json:"HttpHeaders,omitempty"`
+}
+
+// DockerConfig represents the config file used by the docker CLI.
+// This config that represents the credentials that should be used
+// when pulling images from specific image repositories.
+type DockerConfig map[string]DockerConfigEntry
+
+type DockerConfigEntry struct {
+	Username string
+	Password string
+	Email    string
+	Provider DockerConfigProvider
+}
+
+var (
+	preferredPathLock sync.Mutex
+	preferredPath     = ""
+	workingDirPath    = ""
+	homeDirPath       = os.Getenv("HOME")
+	rootDirPath       = "/"
+	homeJsonDirPath   = filepath.Join(homeDirPath, ".docker")
+	rootJsonDirPath   = filepath.Join(rootDirPath, ".docker")
+
+	configFileName     = ".dockercfg"
+	configJsonFileName = "config.json"
+)
+
+func SetPreferredDockercfgPath(path string) {
+	preferredPathLock.Lock()
+	defer preferredPathLock.Unlock()
+	preferredPath = path
+}
+
+func GetPreferredDockercfgPath() string {
+	preferredPathLock.Lock()
+	defer preferredPathLock.Unlock()
+	return preferredPath
+}
+
+//DefaultDockercfgPaths returns default search paths of .dockercfg
+func DefaultDockercfgPaths() []string {
+	return []string{GetPreferredDockercfgPath(), workingDirPath, homeDirPath, rootDirPath}
+}
+
+//DefaultDockerConfigJSONPaths returns default search paths of .docker/config.json
+func DefaultDockerConfigJSONPaths() []string {
+	return []string{GetPreferredDockercfgPath(), workingDirPath, homeJsonDirPath, rootJsonDirPath}
+}
+
+// ReadDockercfgFile attempts to read a legacy dockercfg file from the given paths.
+// if searchPaths is empty, the default paths are used.
+func ReadDockercfgFile(searchPaths []string) (cfg DockerConfig, err error) {
+	if len(searchPaths) == 0 {
+		searchPaths = DefaultDockercfgPaths()
+	}
+
+	for _, configPath := range searchPaths {
+		absDockerConfigFileLocation, err := filepath.Abs(filepath.Join(configPath, configFileName))
+		if err != nil {
+			glog.Errorf("while trying to canonicalize %s: %v", configPath, err)
+			continue
+		}
+		glog.V(4).Infof("looking for .dockercfg at %s", absDockerConfigFileLocation)
+		contents, err := ioutil.ReadFile(absDockerConfigFileLocation)
+		if os.IsNotExist(err) {
+			continue
+		}
+		if err != nil {
+			glog.V(4).Infof("while trying to read %s: %v", absDockerConfigFileLocation, err)
+			continue
+		}
+		cfg, err := readDockerConfigFileFromBytes(contents)
+		if err == nil {
+			glog.V(4).Infof("found .dockercfg at %s", absDockerConfigFileLocation)
+			return cfg, nil
+		}
+	}
+	return nil, fmt.Errorf("couldn't find valid .dockercfg after checking in %v", searchPaths)
+}
+
+// ReadDockerConfigJSONFile attempts to read a docker config.json file from the given paths.
+// if searchPaths is empty, the default paths are used.
+func ReadDockerConfigJSONFile(searchPaths []string) (cfg DockerConfig, err error) {
+	if len(searchPaths) == 0 {
+		searchPaths = DefaultDockerConfigJSONPaths()
+	}
+	for _, configPath := range searchPaths {
+		absDockerConfigFileLocation, err := filepath.Abs(filepath.Join(configPath, configJsonFileName))
+		if err != nil {
+			glog.Errorf("while trying to canonicalize %s: %v", configPath, err)
+			continue
+		}
+		glog.V(4).Infof("looking for %s at %s", configJsonFileName, absDockerConfigFileLocation)
+		cfg, err = ReadSpecificDockerConfigJsonFile(absDockerConfigFileLocation)
+		if err != nil {
+			if !os.IsNotExist(err) {
+				glog.V(4).Infof("while trying to read %s: %v", absDockerConfigFileLocation, err)
+			}
+			continue
+		}
+		glog.V(4).Infof("found valid %s at %s", configJsonFileName, absDockerConfigFileLocation)
+		return cfg, nil
+	}
+	return nil, fmt.Errorf("couldn't find valid %s after checking in %v", configJsonFileName, searchPaths)
+
+}
+
+//ReadSpecificDockerConfigJsonFile attempts to read docker configJSON from a given file path.
+func ReadSpecificDockerConfigJsonFile(filePath string) (cfg DockerConfig, err error) {
+	var contents []byte
+
+	if contents, err = ioutil.ReadFile(filePath); err != nil {
+		return nil, err
+	}
+	return readDockerConfigJsonFileFromBytes(contents)
+}
+
+func ReadDockerConfigFile() (cfg DockerConfig, err error) {
+	if cfg, err := ReadDockerConfigJSONFile(nil); err == nil {
+		return cfg, nil
+	}
+	// Can't find latest config file so check for the old one
+	return ReadDockercfgFile(nil)
+}
+
+// HttpError wraps a non-StatusOK error code as an error.
+type HttpError struct {
+	StatusCode int
+	Url        string
+}
+
+// Error implements error
+func (he *HttpError) Error() string {
+	return fmt.Sprintf("http status code: %d while fetching url %s",
+		he.StatusCode, he.Url)
+}
+
+func ReadUrl(url string, client *http.Client, header *http.Header) (body []byte, err error) {
+	req, err := http.NewRequest("GET", url, nil)
+	if err != nil {
+		return nil, err
+	}
+	if header != nil {
+		req.Header = *header
+	}
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		glog.V(2).Infof("body of failing http response: %v", resp.Body)
+		return nil, &HttpError{
+			StatusCode: resp.StatusCode,
+			Url:        url,
+		}
+	}
+
+	contents, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	return contents, nil
+}
+
+func ReadDockerConfigFileFromUrl(url string, client *http.Client, header *http.Header) (cfg DockerConfig, err error) {
+	if contents, err := ReadUrl(url, client, header); err != nil {
+		return nil, err
+	} else {
+		return readDockerConfigFileFromBytes(contents)
+	}
+}
+
+func readDockerConfigFileFromBytes(contents []byte) (cfg DockerConfig, err error) {
+	if err = json.Unmarshal(contents, &cfg); err != nil {
+		glog.Errorf("while trying to parse blob %q: %v", contents, err)
+		return nil, err
+	}
+	return
+}
+
+func readDockerConfigJsonFileFromBytes(contents []byte) (cfg DockerConfig, err error) {
+	var cfgJson DockerConfigJson
+	if err = json.Unmarshal(contents, &cfgJson); err != nil {
+		glog.Errorf("while trying to parse blob %q: %v", contents, err)
+		return nil, err
+	}
+	cfg = cfgJson.Auths
+	return
+}
+
+// dockerConfigEntryWithAuth is used solely for deserializing the Auth field
+// into a dockerConfigEntry during JSON deserialization.
+type dockerConfigEntryWithAuth struct {
+	// +optional
+	Username string `json:"username,omitempty"`
+	// +optional
+	Password string `json:"password,omitempty"`
+	// +optional
+	Email string `json:"email,omitempty"`
+	// +optional
+	Auth string `json:"auth,omitempty"`
+}
+
+func (ident *DockerConfigEntry) UnmarshalJSON(data []byte) error {
+	var tmp dockerConfigEntryWithAuth
+	err := json.Unmarshal(data, &tmp)
+	if err != nil {
+		return err
+	}
+
+	ident.Username = tmp.Username
+	ident.Password = tmp.Password
+	ident.Email = tmp.Email
+
+	if len(tmp.Auth) == 0 {
+		return nil
+	}
+
+	ident.Username, ident.Password, err = decodeDockerConfigFieldAuth(tmp.Auth)
+	return err
+}
+
+func (ident DockerConfigEntry) MarshalJSON() ([]byte, error) {
+	toEncode := dockerConfigEntryWithAuth{ident.Username, ident.Password, ident.Email, ""}
+	toEncode.Auth = encodeDockerConfigFieldAuth(ident.Username, ident.Password)
+
+	return json.Marshal(toEncode)
+}
+
+// decodeDockerConfigFieldAuth deserializes the "auth" field from dockercfg into a
+// username and a password. The format of the auth field is base64(<username>:<password>).
+func decodeDockerConfigFieldAuth(field string) (username, password string, err error) {
+	decoded, err := base64.StdEncoding.DecodeString(field)
+	if err != nil {
+		return
+	}
+
+	parts := strings.SplitN(string(decoded), ":", 2)
+	if len(parts) != 2 {
+		err = fmt.Errorf("unable to parse auth field")
+		return
+	}
+
+	username = parts[0]
+	password = parts[1]
+
+	return
+}
+
+func encodeDockerConfigFieldAuth(username, password string) string {
+	fieldValue := username + ":" + password
+
+	return base64.StdEncoding.EncodeToString([]byte(fieldValue))
+}