/usr/share/gocode/src/github.com/rakyll/globalconf/globalconf.go is in golang-github-rakyll-globalconf-dev 0.0~git20140819-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 | package globalconf
import (
"flag"
"io/ioutil"
"os"
"os/user"
"path"
"strings"
ini "github.com/glacjay/goini"
)
const (
defaultConfigFileName = "config.ini"
)
var flags map[string]*flag.FlagSet = make(map[string]*flag.FlagSet)
// Represents a GlobalConf context.
type GlobalConf struct {
Filename string
EnvPrefix string
dict *ini.Dict
}
type Options struct {
Filename string
EnvPrefix string
}
// NewWithOptions creates a GlobalConf from the provided
// Options. The caller is responsible for creating any
// referenced config files.
func NewWithOptions(opts *Options) (g *GlobalConf, err error) {
Register("", flag.CommandLine)
var dict ini.Dict
if opts.Filename != "" {
dict, err = ini.Load(opts.Filename)
if err != nil {
return nil, err
}
} else {
dict = make(ini.Dict, 0)
}
return &GlobalConf{
Filename: opts.Filename,
EnvPrefix: opts.EnvPrefix,
dict: &dict,
}, nil
}
// Opens/creates a config file for the specified appName.
// The path to config file is ~/.config/appName/config.ini.
func New(appName string) (g *GlobalConf, err error) {
var u *user.User
if u, err = user.Current(); u == nil {
return
}
// Create config file's directory.
dirPath := path.Join(u.HomeDir, ".config", appName)
if err = os.MkdirAll(dirPath, 0755); err != nil {
return
}
// Touch a config file if it doesn't exit.
filePath := path.Join(dirPath, defaultConfigFileName)
if _, err = os.Stat(filePath); err != nil {
if !os.IsNotExist(err) {
return
}
// create file
if err = ioutil.WriteFile(filePath, []byte{}, 0644); err != nil {
return
}
}
opts := Options{Filename: filePath}
return NewWithOptions(&opts)
}
// Sets a flag's value and persists the changes to the disk.
func (g *GlobalConf) Set(flagSetName string, f *flag.Flag) error {
g.dict.SetString(flagSetName, f.Name, f.Value.String())
if g.Filename != "" {
return ini.Write(g.Filename, g.dict)
}
return nil
}
// Deletes a flag from config file and persists the changes
// to the disk.
func (g *GlobalConf) Delete(flagSetName, flagName string) error {
g.dict.Delete(flagSetName, flagName)
if g.Filename != "" {
return ini.Write(g.Filename, g.dict)
}
return nil
}
// Parses the config file for the provided flag set.
// If the flags are already set, values are overwritten
// by the values in the config file. Defaults are not set
// if the flag is not in the file.
func (g *GlobalConf) ParseSet(flagSetName string, set *flag.FlagSet) {
set.VisitAll(func(f *flag.Flag) {
val := getEnv(g.EnvPrefix, flagSetName, f.Name)
if val != "" {
set.Set(f.Name, val)
return
}
val, found := g.dict.GetString(flagSetName, f.Name)
if found {
set.Set(f.Name, val)
}
})
}
// Parses all the registered flag sets, including the command
// line set and sets values from the config file if they are
// not already set.
func (g *GlobalConf) Parse() {
for name, set := range flags {
alreadySet := make(map[string]bool)
set.Visit(func(f *flag.Flag) {
alreadySet[f.Name] = true
})
set.VisitAll(func(f *flag.Flag) {
// if not already set, set it from dict if exists
if alreadySet[f.Name] {
return
}
val := getEnv(g.EnvPrefix, name, f.Name)
if val != "" {
set.Set(f.Name, val)
return
}
val, found := g.dict.GetString(name, f.Name)
if found {
set.Set(f.Name, val)
}
})
}
}
// Parses command line flags and then, all of the registered
// flag sets with the values provided in the config file.
func (g *GlobalConf) ParseAll() {
if !flag.Parsed() {
flag.Parse()
}
g.Parse()
}
// Looks up variable in environment
func getEnv(envPrefix, flagSetName, flagName string) string {
// If we haven't set an EnvPrefix, don't lookup vals in the ENV
if envPrefix == "" {
return ""
}
// Append a _ to flagSetName if it exists.
if flagSetName != "" {
flagSetName += "_"
}
flagName = strings.Replace(flagName, ".", "_", -1)
flagName = strings.Replace(flagName, "-", "_", -1)
envKey := strings.ToUpper(envPrefix + flagSetName + flagName)
return os.Getenv(envKey)
}
// Registers a flag set to be parsed. Register all flag sets
// before calling this function. flag.CommandLine is automatically
// registered.
func Register(flagSetName string, set *flag.FlagSet) {
flags[flagSetName] = set
}
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