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config.go
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config.go
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package config
import (
"encoding/json"
"fmt"
"io/ioutil"
"os"
"github.com/Shopify/ejson"
"github.com/caarlos0/env/v6"
"github.com/ghodss/yaml"
"github.com/imdario/mergo"
)
var config Config
var secrets Secrets
func ReadConfig(configEnvVar, configFile, secretsFile string) error {
_, err := readConfig(configEnvVar, configFile)
if err != nil {
return err
}
_, err = readSecrets(secretsFile)
if err != nil {
return err
}
return nil
}
func CurrentConfig() *Config {
return &config
}
func CurrentSecrets() *Secrets {
return &secrets
}
func CurrentYnabConfig() *YnabConfig {
return &config.Ynab
}
func CurrentYnabSecrets() *YnabSecrets {
return &secrets.Ynab
}
func CurrentExchangeRateAPISecrets() *ExchangerateAPISecrets {
return &secrets.ExchangerateAPI
}
func CurrentAirtableConfig() *AirtableConfig {
return &config.Airtable
}
func CurrentAirtableSecrets() *AirtableSecrets {
return &secrets.Airtable
}
func CurrentInfluxSecrets() *InfluxSecrets {
return &secrets.Influx
}
func CurrentSqlSecrets() *SqlSecrets {
return &secrets.SQL
}
func readConfig(envName, filename string) (*Config, error) {
var raw []byte
var err error
rawEnv := os.Getenv(envName)
if rawEnv != "" {
fmt.Printf("Reading config from environment variable %s\n", envName)
raw = []byte(rawEnv)
} else {
raw, err = ioutil.ReadFile(filename)
if err != nil {
return nil, err
}
}
err = yaml.Unmarshal(raw, &config)
return &config, err
}
func readSecrets(filename string) (*Secrets, error) {
ejsonSecrets, ejsonErr := readEjsonSecrets(filename)
envSecrets, envErr := readEnvSecrets()
if ejsonErr == nil && envErr == nil {
err := mergo.Merge(envSecrets, *ejsonSecrets)
secrets = *envSecrets
if err != nil {
return nil, fmt.Errorf("Failed to merge secrets: %v", err)
}
} else if ejsonErr != nil && envErr == nil {
fmt.Printf("Warning: Error to parse ejson secret. Ejson error: %v\n", ejsonErr)
secrets = *envSecrets
} else if ejsonErr == nil && envErr != nil {
fmt.Printf("Warning: Error to parse env secret. Env error: %v\n", envErr)
secrets = *ejsonSecrets
} else {
return nil, fmt.Errorf("Failed to parse secrets. Ejson error: %v. Env error: %v", ejsonErr, envErr)
}
return &secrets, nil
}
func readEjsonSecrets(filename string) (*Secrets, error) {
ejsonSecrets := Secrets{}
ejsonKeyFile := os.Getenv("IMPORTERS_EJSON_SECRET_KEY")
ejsonKey := []byte{}
var err error
if ejsonKeyFile != "" {
ejsonKey, err = ioutil.ReadFile(ejsonKeyFile)
if err != nil {
return nil, err
}
}
raw, err := ejson.DecryptFile(filename, "/opt/ejson/keys", string(ejsonKey))
if err != nil {
return nil, err
}
err = json.Unmarshal(raw, &ejsonSecrets)
return &ejsonSecrets, err
}
func readEnvSecrets() (*Secrets, error) {
envSecrets := Secrets{}
err := env.Parse(&envSecrets)
return &envSecrets, err
}