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Override config from environment. See #50
Expects uppercase environment variables of MATTERBRIDGE_PROTOCOL_ACCOUNT_KEY="value" e.g. you can override this config [mattermost] [mattermost.work] Team="yourteam" Login="yourlogin" Password="yourpass" by using MATTERBRIDGE_MATTERMOST_WORK_TEAM="newteam" MATTERBRIDGE_MATTERMOST_WORK_LOGIN="newlogin" MATTERBRIDGE_MATTERMOST_WORK_PASSWORD="newpassword"
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@ -25,6 +25,8 @@ func New(cfg *config.Config, bridge *config.Bridge, c chan config.Message) Bridg
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accInfo := strings.Split(bridge.Account, ".")
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protocol := accInfo[0]
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name := accInfo[1]
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// override config from environment
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config.OverrideCfgFromEnv(cfg, protocol, name)
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switch protocol {
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case "mattermost":
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return bmattermost.New(cfg.Mattermost[name], name, c)
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@ -3,6 +3,9 @@ package config
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import (
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"github.com/BurntSushi/toml"
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"log"
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"os"
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"reflect"
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"strings"
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)
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type Message struct {
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@ -80,3 +83,40 @@ func NewConfig(cfgfile string) *Config {
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}
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return &cfg
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}
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func OverrideCfgFromEnv(cfg *Config, protocol string, account string) {
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var protoCfg Protocol
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val := reflect.ValueOf(cfg).Elem()
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// loop over the Config struct
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for i := 0; i < val.NumField(); i++ {
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typeField := val.Type().Field(i)
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// look for the protocol map (both lowercase)
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if strings.ToLower(typeField.Name) == protocol {
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// get the Protocol struct from the map
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data := val.Field(i).MapIndex(reflect.ValueOf(account))
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protoCfg = data.Interface().(Protocol)
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protoStruct := reflect.ValueOf(&protoCfg).Elem()
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// loop over the found protocol struct
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for i := 0; i < protoStruct.NumField(); i++ {
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typeField := protoStruct.Type().Field(i)
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// build our environment key (eg MATTERBRIDGE_MATTERMOST_WORK_LOGIN)
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key := "matterbridge_" + protocol + "_" + account + "_" + typeField.Name
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key = strings.ToUpper(key)
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// search the environment
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res := os.Getenv(key)
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// if it exists and the current field is a string
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// then update the current field
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if res != "" {
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fieldVal := protoStruct.Field(i)
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if fieldVal.Kind() == reflect.String {
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log.Printf("config: overriding %s from env with %s\n", key, res)
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fieldVal.Set(reflect.ValueOf(res))
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}
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}
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}
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// update the map with the modified Protocol (cfg.Protocol[account] = Protocol)
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val.Field(i).SetMapIndex(reflect.ValueOf(account), reflect.ValueOf(protoCfg))
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break
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}
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}
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}
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