Override config file path using ONELOGIN_AUTH_CLI_CONFIG_FILE (#7)

* feat: override a path to config file #5

README.md

@@ -34,6 +34,18 @@ roles:
 defaultRegion: us-east-1
 ```
 
+### Environment Variables (optional)
+
+If you use external password managers, you can use environment variables to automate the login process.
+
+The following environment variables are supported:
+
+ - `EMAIL` - email address of the user to login as
+ - `PASSWORD` - password of the user to login as
+ - `OTP` - One Time Password (if MFA is enabled)
+
+If you prefere to specify the path to the config file, you can use the `ONELOGIN_AUTH_CLI_CONFIG_FILE` environment variable.
+
 ### Login
 
 ```

cmd/root.go

@@ -2,6 +2,7 @@ package cmd
 
 import (
 	"log"
+	"os"
 
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
@@ -65,9 +66,14 @@ func init() {
 }
 
 func LoadConfig(path string) (config Config, err error) {
-	viper.AddConfigPath(path)
-	viper.SetConfigName("config")
-	viper.SetConfigType("yaml")
+	userDefinedConfigFile := os.Getenv("ONELOGIN_AUTH_CLI_CONFIG_FILE")
+	if userDefinedConfigFile != "" {
+		viper.SetConfigFile(userDefinedConfigFile)
+	} else {
+		viper.AddConfigPath(path)
+		viper.SetConfigName("config")
+		viper.SetConfigType("yaml")
+	}
 
 	viper.AutomaticEnv()