mirror of https://github.com/docker/cli.git
132 lines
3.7 KiB
Go
132 lines
3.7 KiB
Go
package config
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import (
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"fmt"
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"io"
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"os"
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"path/filepath"
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"strings"
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"sync"
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"github.com/docker/cli/cli/config/configfile"
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"github.com/docker/cli/cli/config/credentials"
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"github.com/docker/cli/cli/config/types"
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"github.com/docker/docker/pkg/homedir"
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"github.com/pkg/errors"
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)
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const (
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// EnvOverrideConfigDir is the name of the environment variable that can be
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// used to override the location of the client configuration files (~/.docker).
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//
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// It takes priority over the default, but can be overridden by the "--config"
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// command line option.
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EnvOverrideConfigDir = "DOCKER_CONFIG"
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// ConfigFileName is the name of the client configuration file inside the
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// config-directory.
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ConfigFileName = "config.json"
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configFileDir = ".docker"
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contextsDir = "contexts"
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)
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var (
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initConfigDir = new(sync.Once)
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configDir string
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)
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// resetConfigDir is used in testing to reset the "configDir" package variable
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// and its sync.Once to force re-lookup between tests.
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func resetConfigDir() {
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configDir = ""
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initConfigDir = new(sync.Once)
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}
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// Dir returns the directory the configuration file is stored in
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func Dir() string {
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initConfigDir.Do(func() {
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configDir = os.Getenv(EnvOverrideConfigDir)
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if configDir == "" {
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configDir = filepath.Join(homedir.Get(), configFileDir)
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}
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})
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return configDir
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}
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// ContextStoreDir returns the directory the docker contexts are stored in
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func ContextStoreDir() string {
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return filepath.Join(Dir(), contextsDir)
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}
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// SetDir sets the directory the configuration file is stored in
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func SetDir(dir string) {
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// trigger the sync.Once to synchronise with Dir()
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initConfigDir.Do(func() {})
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configDir = filepath.Clean(dir)
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}
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// Path returns the path to a file relative to the config dir
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func Path(p ...string) (string, error) {
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path := filepath.Join(append([]string{Dir()}, p...)...)
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if !strings.HasPrefix(path, Dir()+string(filepath.Separator)) {
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return "", errors.Errorf("path %q is outside of root config directory %q", path, Dir())
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}
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return path, nil
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}
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// LoadFromReader is a convenience function that creates a ConfigFile object from
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// a reader
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func LoadFromReader(configData io.Reader) (*configfile.ConfigFile, error) {
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configFile := configfile.ConfigFile{
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AuthConfigs: make(map[string]types.AuthConfig),
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}
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err := configFile.LoadFromReader(configData)
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return &configFile, err
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}
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// Load reads the configuration files in the given directory, and sets up
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// the auth config information and returns values.
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func Load(configDir string) (*configfile.ConfigFile, error) {
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if configDir == "" {
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configDir = Dir()
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}
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return load(configDir)
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}
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func load(configDir string) (*configfile.ConfigFile, error) {
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filename := filepath.Join(configDir, ConfigFileName)
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configFile := configfile.New(filename)
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file, err := os.Open(filename)
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if err != nil {
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if os.IsNotExist(err) {
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//
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// if file is there but we can't stat it for any reason other
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// than it doesn't exist then stop
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return configFile, nil
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}
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// if file is there but we can't stat it for any reason other
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// than it doesn't exist then stop
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return configFile, nil
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}
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defer file.Close()
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err = configFile.LoadFromReader(file)
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if err != nil {
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err = errors.Wrap(err, filename)
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}
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return configFile, err
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}
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// LoadDefaultConfigFile attempts to load the default config file and returns
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// an initialized ConfigFile struct if none is found.
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func LoadDefaultConfigFile(stderr io.Writer) *configfile.ConfigFile {
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configFile, err := load(Dir())
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if err != nil {
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_, _ = fmt.Fprintf(stderr, "WARNING: Error loading config file: %v\n", err)
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}
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if !configFile.ContainsAuth() {
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configFile.CredentialsStore = credentials.DetectDefaultStore(configFile.CredentialsStore)
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}
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return configFile
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}
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