Removed custom targets from config system

docs/config_system.md

@@ -223,24 +223,6 @@ For example, an application may want to remove features with extra space or runt
 }
 ```
 
-## Custom targets
-
-Application configuration can optionally define application-specific targets. These are mbed targets that are needed just to compile this specific application, so it doesn't make sense to add them to the list of official mbed targets; on the contrary, since they're part of `mbed_app.json`, they're versioned together with the application and only known by the application. Application-specific targets are defined with the key `custom_targets` in the `mbed_app.json` file and have the same syntax as a regular target definition, for example:
-
-
-```
-{
-    "custom_targets": {
-       "k64f_myapp": {
-           "inherits": ["K64F"],
-           "extra_labels_add": ["CUSTOM_K64F_LIB"]
-       }
-    }
-}
-```
-
-This will define a new target named `k64f_myapp` that inherits from the `K64F` mbed target, but with an extra label defined, which will change the way the build system looks for sources in the tree.
-
 # Configuration data precedence
 
 The order in which the various bits of configurations are considered is this:

tools/config.py

@@ -341,7 +341,7 @@ class Config(object):
     __allowed_keys = {
         "library": set(["name", "config", "target_overrides", "macros",
                         "__config_path"]),
-        "application": set(["config", "custom_targets", "target_overrides",
+        "application": set(["config", "target_overrides",
                             "macros", "__config_path"])
     }
 
@@ -363,11 +363,9 @@ def __init__(self, target, top_level_dirs=None, app_config=None):
         app_config - location of a chosen mbed_app.json file
 
         NOTE: Construction of a Config object will look for the application
-        configuration file in top_level_dirs. If found once, it'll parse it and
-        check if it has a custom_targets function. If it does, it'll update the
-        list of targets as needed. If more than one config file is found, an
-        exception is raised. top_level_dirs may be None (in this case,
-        the constructor will not search for a configuration file)
+        configuration file in top_level_dirs. If found once, it'll parse it.
+        top_level_dirs may be None (in this case, the constructor will not
+        search for a configuration file).
         """
         app_config_location = app_config
         if app_config_location is None:
@@ -396,7 +394,6 @@ def __init__(self, target, top_level_dirs=None, app_config=None):
                                    self.__mbed_app_config_name))
         # Update the list of targets with the ones defined in the application
         # config, if applicable
-        Target.add_py_targets(self.app_config_data.get("custom_targets", {}))
         self.lib_config_data = {}
         # Make sure that each config is processed only once
         self.processed_configs = {}

tools/targets.py

@@ -66,10 +66,6 @@ class Target(object):
     # need to be computed differently than regular attributes
     cumulative_attributes = ['extra_labels', 'macros', 'device_has', 'features']
 
-    # List of targets that were added dynamically using "add_py_targets" (see
-    # below)
-    __py_targets = set()
-
     # Default location of the 'targets.json' file
     __targets_json_location_default = os.path.join(
         os.path.dirname(os.path.abspath(__file__)), '..', 'hal', 'targets.json')
@@ -226,26 +222,6 @@ def __getattr__(self, attrname):
         self.__dict__[attrname] = result
         return result
 
-    @staticmethod
-    def add_py_targets(new_targets):
-        """Add one or more new target(s) represented as a Python dictionary
-        in 'new_targets'. It is an error to add a target with a name that
-        already exists.
-        """
-        crt_data = Target.get_json_target_data()
-        for target_key, target_value in new_targets.items():
-            if crt_data.has_key(target_key):
-                raise Exception(
-                    "Attempt to add target '%s' that already exists"
-                    % target_key)
-            # Add target data to the internal target dictionary
-            crt_data[target_key] = target_value
-            # Create the new target and add it to the relevant data structures
-            new_target = Target(target_key)
-            TARGETS.append(new_target)
-            TARGET_MAP[target_key] = new_target
-            TARGET_NAMES.append(target_key)
-
     @staticmethod
     @cached
     def get_target(target_name):

tools/test/config_test/config_test.py

@@ -39,13 +39,17 @@ def test_tree(full_name, name):
     if "test_data" in sys.modules:
        del sys.modules["test_data"]
     import test_data
+    # If the test defines custom targets, they must exist in a file called
+    # "targets.json" in the test's directory.
+    if os.path.isfile(os.path.join(full_name, "targets.json")):
+        set_targets_json_location(os.path.join(full_name, "targets.json"))
+    else: # uset the regular set of targets
+        set_targets_json_location()
     for target, expected in test_data.expected_results.items():
         sys.stdout.write("%s:'%s'(%s) " % (name, expected["desc"], target))
         sys.stdout.flush()
         err_msg = None
         try:
-            # Use 'set_targets_json_location' to remove the previous custom targets from the target list
-            set_targets_json_location(Target._Target__targets_json_location)
             cfg, macros, features = get_config(full_name, target, "GCC_ARM")
             macros = Config.config_macros_to_macros(macros)
         except ConfigException as e:

tools/test/config_test/test01/targets.json

@@ -0,0 +1,42 @@
+{
+    "b1": {
+        "extra_labels": [],
+        "default_lib": "std",
+        "core": "Cortex-M0",
+        "config": {
+            "base1_1": "v_base1_1_b1",
+            "base1_2": "v_base1_2_b1",
+            "base1_3": "v_base1_3_b1"
+        }
+    },
+    "d1": {
+        "inherits": ["b1"],
+        "config": {
+            "derived1": "v_derived1_d1",
+            "derived2": "v_derived2_d1"
+        },
+        "overrides": {
+            "base1_1": "v_base1_1_d1",
+            "base1_2": "v_base1_2_d1"
+        }
+    },
+    "b2": {
+        "config": {
+            "base2_1": "v_base2_1_b2",
+            "base2_2": "v_base2_2_b2"
+        }
+    },
+    "f": {
+        "inherits": ["b2", "d1"],
+        "config": {
+            "f1_1": "v_f1_1_f",
+            "f1_2": "v_f1_2_f"
+        },
+        "overrides": {
+            "base2_1": "v_base2_1_f",
+            "base1_1": "v_base1_1_f",
+            "derived2": "v_derived2_f",
+            "f1_1": "v_f1_1_f_override"
+        }
+    }
+}

tools/test/config_test/test02/targets.json

@@ -0,0 +1,46 @@
+{
+    "b1": {
+        "extra_labels": [],
+        "default_lib": "std",
+        "core": "Cortex-M0",
+        "config": {
+            "base1_1": "v_base1_1_b1",
+            "base1_2": "v_base1_2_b1",
+            "base1_3": "v_base1_3_b1"
+        }
+    },
+    "d1": {
+        "inherits": ["b1"],
+        "config": {
+            "derived1": "v_derived1_d1",
+            "derived2": "v_derived2_d1"
+        },
+        "overrides": {
+            "base1_1": "v_base1_1_d1",
+            "base1_2": "v_base1_2_d1"
+        }
+    },
+    "b2": {
+        "inherits": ["b1"],
+        "config": {
+            "base2_1": "v_base2_1_b2",
+            "base2_2": "v_base2_2_b2"
+        },
+        "overrides": {
+            "base1_2": "v_base1_2_b2"
+        }
+    },
+    "f": {
+        "inherits": ["d1", "b2"],
+        "config": {
+            "f1_1": "v_f1_1_f",
+            "f1_2": "v_f1_2_f"
+        },
+        "overrides": {
+            "base2_1": "v_base2_1_f",
+            "base1_1": "v_base1_1_f",
+            "derived2": "v_derived2_f",
+            "f1_1": "v_f1_1_f_override"
+        }
+    }
+}

tools/test/config_test/test03/targets.json

@@ -0,0 +1,45 @@
+{
+    "b1": {
+        "extra_labels": [],
+        "default_lib": "std",
+        "core": "Cortex-M0",
+        "config": {
+            "base1_1": "v_base1_1_b1",
+            "base1_2": "v_base1_2_b1",
+            "base1_3": "v_base1_3_b1"
+        }
+    },
+    "d1": {
+        "inherits": ["b1"],
+        "config": {
+            "derived1": "v_derived1_d1",
+            "derived2": "v_derived2_d1"
+        },
+        "overrides": {
+            "base1_1": "v_base1_1_d1",
+            "base1_2": "v_base1_2_d1"
+        }
+    },
+    "b2": {
+        "config": {
+            "base2_1": "v_base2_1_b2",
+            "base2_2": "v_base2_2_b2"
+        },
+        "overrides": {
+            "base1_1": "v_base1_1_b2"
+        }
+    },
+    "f": {
+        "inherits": ["b2", "d1"],
+        "config": {
+            "f1_1": "v_f1_1_f",
+            "f1_2": "v_f1_2_f"
+        },
+        "overrides": {
+            "base2_1": "v_base2_1_f",
+            "base1_1": "v_base1_1_f",
+            "derived2": "v_derived2_f",
+            "f1_1": "v_f1_1_f_override"
+        }
+    }
+}