Merge pull request #19 from samblooms/master

Add optional custom config directory $AUTHY_ROOT

README.md

@@ -24,6 +24,17 @@ go get github.com/momaek/authy
 8. Double click `Authy.alfredworkflow` or manual import from Alfred
 9. Open Alfred and type `at {query}`
 
+### *Optional Configuration*
+By default, the authy config file (.authy.json) and cache (.authy.cache) are stored in `$HOME`.
+A custom configuration directory can be set with the environment variable `$AUTHY_ROOT`
+
+e.g.
+```
+export AUTHY_ROOT=~/.dotfiles/secrets/authy
+```
+the example above would create the config file `~/.dotfiles/secrets/authy/.authy.json`
+
+
 #### Attention
 To use this tool, you should enable *Allow Multi-Device* in your Authy App
 

service/device.go

@@ -270,11 +270,19 @@ func (d *Device) LoadExistingDeviceInfo() (devInfo DeviceRegistration, err error
 }
 
 // ConfigPath get config file path
+// Return the path to the config file
+// If the file does not exist, it will be created at $HOME ( or optionally AUTHY_ROOT )
 func (d *Device) ConfigPath(fname string) (string, error) {
 	if len(d.conf.ConfigFilePath) == 0 {
+		authy_root_path, root_dir_exists := os.LookupEnv("AUTHY_ROOT")
 		devPath, err := homedir.Dir()
-		if err != nil {
-			return "", err
+		if root_dir_exists {
+			devPath = authy_root_path 
+			d.conf.ConfigFilePath = devPath
+		} else {
+			if err != nil {
+				return "", err
+			}
 		}
 
 		d.conf.ConfigFilePath = devPath