dont' get stuck if backend is not supported

src/backend.ts

@@ -43,16 +43,20 @@ export const getBackendsFromLocations = (locations: Locations): string[] => {
 
 export const checkAndConfigureBackend = (name: string, backend: Backend) => {
  const writer = new Writer(name.blue + ' : ' + 'Configuring... ⏳')
- const env = getEnvFromBackend(backend)
+ try {
+ const env = getEnvFromBackend(backend)
 
- const { out, err } = exec('restic', ['init'], { env })
+  const { out, err } = exec('restic', ['init'], { env })
 
- if (err.length > 0 && !ALREADY_EXISTS.test(err))
- throw new Error(`Could not load the backend "${name}": ${err}`)
+  if (err.length > 0 && !ALREADY_EXISTS.test(err))
+  throw new Error(`Could not load the backend "${name}": ${err}`)
 
- if (VERBOSE && out.length > 0) console.log(out)
+  if (VERBOSE && out.length > 0) console.log(out)
 
- writer.done(name.blue + ' : ' + 'Done ✓'.green)
+ writer.done(name.blue + ' : ' + 'Done ✓'.green)
+ } catch (e) {
+ writer.done(name.blue + ' : ' + 'Error ⚠️ ' + e.message.red)
+ }
 }
 
 export const checkAndConfigureBackends = (backends?: Backends) => {