/
config.go
131 lines (116 loc) · 3.66 KB
/
config.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
package config
import (
"fmt"
"io"
"os"
"path/filepath"
"strings"
"sync"
"github.com/docker/cli/cli/config/configfile"
"github.com/docker/cli/cli/config/credentials"
"github.com/docker/cli/cli/config/types"
"github.com/docker/docker/pkg/homedir"
"github.com/pkg/errors"
)
const (
// EnvOverrideConfigDir is the name of the environment variable that can be
// used to override the location of the client configuration files (~/.docker).
//
// It takes priority over the default, but can be overridden by the "--config"
// command line option.
EnvOverrideConfigDir = "DOCKER_CONFIG"
// ConfigFileName is the name of the client configuration file inside the
// config-directory.
ConfigFileName = "config.json"
configFileDir = ".docker"
contextsDir = "contexts"
)
var (
initConfigDir = new(sync.Once)
configDir string
)
// resetConfigDir is used in testing to reset the "configDir" package variable
// and its sync.Once to force re-lookup between tests.
func resetConfigDir() {
configDir = ""
initConfigDir = new(sync.Once)
}
// Dir returns the directory the configuration file is stored in
func Dir() string {
initConfigDir.Do(func() {
configDir = os.Getenv(EnvOverrideConfigDir)
if configDir == "" {
configDir = filepath.Join(homedir.Get(), configFileDir)
}
})
return configDir
}
// ContextStoreDir returns the directory the docker contexts are stored in
func ContextStoreDir() string {
return filepath.Join(Dir(), contextsDir)
}
// SetDir sets the directory the configuration file is stored in
func SetDir(dir string) {
// trigger the sync.Once to synchronise with Dir()
initConfigDir.Do(func() {})
configDir = filepath.Clean(dir)
}
// Path returns the path to a file relative to the config dir
func Path(p ...string) (string, error) {
path := filepath.Join(append([]string{Dir()}, p...)...)
if !strings.HasPrefix(path, Dir()+string(filepath.Separator)) {
return "", errors.Errorf("path %q is outside of root config directory %q", path, Dir())
}
return path, nil
}
// LoadFromReader is a convenience function that creates a ConfigFile object from
// a reader
func LoadFromReader(configData io.Reader) (*configfile.ConfigFile, error) {
configFile := configfile.ConfigFile{
AuthConfigs: make(map[string]types.AuthConfig),
}
err := configFile.LoadFromReader(configData)
return &configFile, err
}
// Load reads the configuration files in the given directory, and sets up
// the auth config information and returns values.
func Load(configDir string) (*configfile.ConfigFile, error) {
if configDir == "" {
configDir = Dir()
}
return load(configDir)
}
func load(configDir string) (*configfile.ConfigFile, error) {
filename := filepath.Join(configDir, ConfigFileName)
configFile := configfile.New(filename)
file, err := os.Open(filename)
if err != nil {
if os.IsNotExist(err) {
//
// if file is there but we can't stat it for any reason other
// than it doesn't exist then stop
return configFile, nil
}
// if file is there but we can't stat it for any reason other
// than it doesn't exist then stop
return configFile, nil
}
defer file.Close()
err = configFile.LoadFromReader(file)
if err != nil {
err = errors.Wrap(err, filename)
}
return configFile, err
}
// LoadDefaultConfigFile attempts to load the default config file and returns
// an initialized ConfigFile struct if none is found.
func LoadDefaultConfigFile(stderr io.Writer) *configfile.ConfigFile {
configFile, err := load(Dir())
if err != nil {
_, _ = fmt.Fprintf(stderr, "WARNING: Error loading config file: %v\n", err)
}
if !configFile.ContainsAuth() {
configFile.CredentialsStore = credentials.DetectDefaultStore(configFile.CredentialsStore)
}
return configFile
}