Merge pull request #43 from bueti/use-env-vars

optional use of env vars for use on servers

README.md

@@ -36,6 +36,15 @@ To configure your username and password run:
 bocker config set
 ```
 
+If you want to run bocker on server where there's no keyring tool installed, set the following environment variables:
+
+```sh
+export DOCKER_USERNAME=<your docker username>
+export DOCKER_PASSWORD=<your docker password>
+```
+
+`bocker` will prefer environment variables over the keyring.
+
 ![bocker config](https://vhs.charm.sh/vhs-6w65TVtSWeJqk5oGv5N9cp.gif)
 
 ### List existing backups

pkg/config/config.go

@@ -96,6 +96,10 @@ func SetKey(service, secret string) error {
 
 // GetKey retrieves a key from the OS keyring
 func GetKey(service string) (string, error) {
+	if os.Getenv("DOCKER_PASSWORD") != "" {
+		return os.Getenv("DOCKER_PASSWORD"), nil
+	}
+
 	// get password
 	secret, err := keyring.Get(service, AppName)
 	if err != nil {
@@ -110,6 +114,10 @@ func GetKey(service string) (string, error) {
 func GetUsername() (*Username, error) {
 	var username Username
 
+	if os.Getenv("DOCKER_USERNAME") != "" {
+		return &Username{Username: os.Getenv("DOCKER_USERNAME")}, nil
+	}
+
 	dir, err := xdg.ConfigFile(AppName)
 	if err != nil {
 		return nil, err