blob: 3587e9fa806449465d8298a99a84eaee8e3198cd (
plain)
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
|
package config
import (
"errors"
"io"
"os"
"strconv"
"github.com/hashicorp/go-multierror"
"github.com/spf13/viper"
)
// Config holds the server configuration.
type Config struct {
Server *Server `mapstructure:"server"`
Auth *Auth `mapstructure:"auth"`
SSH *SSH `mapstructure:"ssh"`
AWS *AWS `mapstructure:"aws"`
}
// unmarshalled holds the raw config.
type unmarshalled struct {
Server []Server `mapstructure:"server"`
Auth []Auth `mapstructure:"auth"`
SSH []SSH `mapstructure:"ssh"`
AWS []AWS `mapstructure:"aws"`
}
// Server holds the configuration specific to the web server and sessions.
type Server struct {
UseTLS bool `mapstructure:"use_tls"`
TLSKey string `mapstructure:"tls_key"`
TLSCert string `mapstructure:"tls_cert"`
Addr string `mapstructure:"address"`
Port int `mapstructure:"port"`
User string `mapstructure:"user"`
CookieSecret string `mapstructure:"cookie_secret"`
CSRFSecret string `mapstructure:"csrf_secret"`
HTTPLogFile string `mapstructure:"http_logfile"`
Datastore string `mapstructure:"datastore"`
}
// Auth holds the configuration specific to the OAuth provider.
type Auth struct {
OauthClientID string `mapstructure:"oauth_client_id"`
OauthClientSecret string `mapstructure:"oauth_client_secret"`
OauthCallbackURL string `mapstructure:"oauth_callback_url"`
Provider string `mapstructure:"provider"`
ProviderOpts map[string]string `mapstructure:"provider_opts"`
UsersWhitelist []string `mapstructure:"users_whitelist"`
}
// SSH holds the configuration specific to signing ssh keys.
type SSH struct {
SigningKey string `mapstructure:"signing_key"`
AdditionalPrincipals []string `mapstructure:"additional_principals"`
MaxAge string `mapstructure:"max_age"`
Permissions []string `mapstructure:"permissions"`
}
// AWS holds Amazon AWS configuration.
// AWS can also be configured using SDK methods.
type AWS struct {
Region string `mapstructure:"region"`
AccessKey string `mapstructure:"access_key"`
SecretKey string `mapstructure:"secret_key"`
}
func verifyConfig(u *unmarshalled) error {
var err error
if len(u.SSH) == 0 {
err = multierror.Append(errors.New("missing ssh config block"))
}
if len(u.Auth) == 0 {
err = multierror.Append(errors.New("missing auth config block"))
}
if len(u.Server) == 0 {
err = multierror.Append(errors.New("missing server config block"))
}
if len(u.AWS) == 0 {
// AWS config is optional
u.AWS = append(u.AWS, AWS{})
}
return err
}
func setFromEnv(u *unmarshalled) {
port, err := strconv.Atoi(os.Getenv("PORT"))
if err == nil {
u.Server[0].Port = port
}
if os.Getenv("DATASTORE") != "" {
u.Server[0].Datastore = os.Getenv("DATASTORE")
}
if os.Getenv("OAUTH_CLIENT_ID") != "" {
u.Auth[0].OauthClientID = os.Getenv("OAUTH_CLIENT_ID")
}
if os.Getenv("OAUTH_CLIENT_SECRET") != "" {
u.Auth[0].OauthClientSecret = os.Getenv("OAUTH_CLIENT_SECRET")
}
if os.Getenv("CSRF_SECRET") != "" {
u.Server[0].CSRFSecret = os.Getenv("CSRF_SECRET")
}
if os.Getenv("COOKIE_SECRET") != "" {
u.Server[0].CookieSecret = os.Getenv("COOKIE_SECRET")
}
}
// ReadConfig parses a JSON configuration file into a Config struct.
func ReadConfig(r io.Reader) (*Config, error) {
u := &unmarshalled{}
v := viper.New()
v.SetConfigType("hcl")
if err := v.ReadConfig(r); err != nil {
return nil, err
}
if err := v.Unmarshal(u); err != nil {
return nil, err
}
setFromEnv(u)
if err := verifyConfig(u); err != nil {
return nil, err
}
return &Config{
Server: &u.Server[0],
Auth: &u.Auth[0],
SSH: &u.SSH[0],
AWS: &u.AWS[0],
}, nil
}
|