Disallow execution of mbed commands without program root

Author: screamerbg

mbed/mbed.py

@@ -791,8 +791,8 @@ def fromrepo(cls, path=None):
                 repo.is_cwd = False
             else:
                 path = os.getcwd()
-                warning(
-                    "Could not find mbed program in current path. Assuming current dir.\n"
+                error(
+                    "Could not find mbed program in current path.\n"
                     "You can fix this by calling \"mbed new .\" or \"mbed default root .\" in the root of your program.")
 
         repo.path = os.path.abspath(path)
@@ -1032,10 +1032,14 @@ def __init__(self, path=None, print_warning=False):
         self.name = os.path.basename(self.path)
 
         # is_cwd flag indicates that current dir is assumed to be root, not root repo
-        if self.is_cwd and print_warning:
-            warning(
-                "Could not find mbed program in current path. Assuming current dir.\n"
+        if self.is_cwd:
+            msg = (
+                "Could not find mbed program in current path.\n"
                 "You can fix this by calling \"mbed new .\" or \"mbed default root .\" in the root of your program.")
+            if print_warning:
+                warning(msg)
+            else:
+                error(msg)
 
     # Sets config value
     def set_cfg(self, var, val):