tests: add basic cli tests

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>

dagger/compiler/value.go

@@ -208,7 +208,10 @@ func (v *Value) Source(opts ...cue.Option) ([]byte, error) {
 	v.cc.rlock()
 	defer v.cc.runlock()
 
-	return cueformat.Node(v.val.Eval().Syntax(opts...))
+	return cueformat.Node(v.val.Eval().Syntax(opts...),
+		cueformat.UseSpaces(4),
+		cueformat.TabIndent(false),
+	)
 }
 
 func (v *Value) IsEmptyStruct() bool {

dagger/store.go

@@ -46,7 +46,11 @@ func NewStore(root string) (*Store, error) {
 }
 
 func DefaultStore() (*Store, error) {
-	return NewStore(os.ExpandEnv(defaultStoreRoot))
+	root := defaultStoreRoot
+	if r := os.Getenv("DAGGER_STORE"); r != "" {
+		root = r
+	}
+	return NewStore(root)
 }
 
 func (s *Store) deploymentPath(name string) string {