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loader.go
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loader.go
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package config
import (
"bytes"
"os"
"path/filepath"
"strings"
"github.com/brainexe/viper"
"gopkg.in/yaml.v3"
)
// Load all yaml config from a directory or a single .yaml file
func Load(configFile string) (Config, error) {
// don't use '.' or '_' etc as delimiter, as it will block having this chars as map keys
keyDelimiter := "§"
v := viper.NewWithOptions(viper.KeyDelimiter(keyDelimiter), viper.KeyPreserveCase())
v.SetConfigType("yaml")
v.AllowEmptyEnv(true)
v.SetEnvPrefix("BOT")
v.SetEnvKeyReplacer(strings.NewReplacer(".", "_", keyDelimiter, "_"))
v.AutomaticEnv()
cfg := DefaultConfig
cfg.viper = v
// workaround to take all keys from struct available
defaultYaml, _ := yaml.Marshal(DefaultConfig)
_ = v.ReadConfig(bytes.NewBuffer(defaultYaml))
fileInfo, err := os.Stat(configFile)
if err != nil {
// no file/directory
return cfg, err
} else if fileInfo.IsDir() {
// read all files in a directory
files, err := filepath.Glob(configFile + "/*.yaml")
if err != nil {
return cfg, err
}
for _, file := range files {
err := loadFile(v, file)
if err != nil {
return cfg, err
}
}
} else {
err := loadFile(v, configFile)
if err != nil {
return cfg, err
}
}
if err := v.Unmarshal(&cfg); err != nil {
return cfg, err
}
return cfg, nil
}
func loadFile(v *viper.Viper, configFile string) error {
// read a single yaml file
file, err := os.Open(configFile) // #nosec
if err != nil {
return err
}
defer file.Close()
return v.MergeConfig(file)
}