cleanup and switch to just sync token

client.go

@@ -1,8 +1,11 @@
 package matrixbotlib
 
 import (
+	"io"
+	"os"
 	"strings"
 
+	"gopkg.in/yaml.v2"
 	"maunium.net/go/mautrix"
 	"maunium.net/go/mautrix/event"
 	"maunium.net/go/mautrix/id"
@@ -37,11 +40,37 @@ func NewMatrixClient(config *MatrixClientConfig, store mautrix.Storer) (*mautrix
 			return client, err
 		}
 		config.Token = loginRes.AccessToken
-		WriteMatrixClientConfig(config)
+		err = SyncToken(config)
+		if err != nil {
+			return nil, err
+		}
 	}
 	return client, err
 }
 
+func SyncToken(config *MatrixClientConfig) error {
+	file, err := os.OpenFile(config.filename, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0o600)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	t := make(map[string]interface{})
+	data, err := io.ReadAll(file)
+	if err != nil {
+		return err
+	}
+	yaml.Unmarshal([]byte(data), &t)
+	t["token"] = config.Token
+	enc := yaml.NewEncoder(file)
+
+	err = enc.Encode(t)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
 // SetupAccountDataStore sets the client to use a AccountData store and filter appropriately
 func SetupAccountDataStore(client *mautrix.Client, token string) error {
 	dataFilter := &mautrix.Filter{

config.go

@@ -1,19 +1,20 @@
 package matrixbotlib
 
 import (
-	"io/ioutil"
+	"errors"
 	"os"
 
+	"github.com/kelseyhightower/envconfig"
 	"gopkg.in/yaml.v2"
 )
 
 // MatrixClientConfig represents the config requires to log into the matrix server
 type MatrixClientConfig struct {
-	Homeserver string `yaml:"homeserver"`
-	Domain     string `yaml:"domain"`
+	Homeserver string `required:"true" yaml:"homeserver"`
+	Domain     string `required:"true" yaml:"domain"`
 	Dimension  string `yaml:"dimension"`
-	Username   string `yaml:"username"`
-	Password   string `yaml:"password"`
+	Username   string `required:"true" yaml:"username"`
+	Password   string `required:"true" yaml:"password"`
 	Statefile  string `yaml:"statefile,omitempty"`
 	Token      string `yaml:"token"`
 	filename   string
@@ -21,23 +22,33 @@ type MatrixClientConfig struct {
 
 // LoadMatrixClientConfig reads info from a file
 func LoadMatrixClientConfig(filename string) (*MatrixClientConfig, error) {
-	yamlFile, err := ioutil.ReadFile(filename)
-	cnf := &MatrixClientConfig{}
+	cnf := MatrixClientConfig{}
+	if filename != "" {
+		yamlFile, err := os.ReadFile(filename)
 		if err == nil {
-		err = yaml.Unmarshal(yamlFile, cnf)
+			err = yaml.Unmarshal(yamlFile, &cnf)
 		} else {
-		return cnf, err
+			return &cnf, err
 		}
 		if err != nil {
-		return cnf, err
+			return &cnf, err
 		}
 		cnf.filename = filename
-	return cnf, nil
+	} else {
+		err := envconfig.Process("matrix", &cnf)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return &cnf, nil
 }
 
 // WriteMatrixClientConfig saves current running config to a file
 func WriteMatrixClientConfig(cnf *MatrixClientConfig) error {
-	file, err := os.OpenFile(cnf.filename, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
+	if cnf.filename == "" {
+		return errors.New("not loaded from config file")
+	}
+	file, err := os.OpenFile(cnf.filename, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0o600)
 	if err != nil {
 		return err
 	}

go.mod

@@ -8,6 +8,7 @@ require (
 )
 
 require (
+	github.com/kelseyhightower/envconfig v1.4.0 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.19 // indirect
 	github.com/rs/zerolog v1.29.1 // indirect

go.sum

@@ -1,6 +1,8 @@
 github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
+github.com/kelseyhightower/envconfig v1.4.0 h1:Im6hONhd3pLkfDFsbRgu68RDNkGF1r3dvMUtDTo2cv8=
+github.com/kelseyhightower/envconfig v1.4.0/go.mod h1:cccZRl6mQpaq41TPp5QxidR+Sa3axMbJDNb//FQX6Gg=
 github.com/mattn/go-colorable v0.1.12/go.mod h1:u5H1YNBxpqRaxsYJYSkiCWKzEfiAb1Gb520KVy5xxl4=
 github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
 github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=