[one-cmds] Print available target (Samsung#13339)

This commit make onecc print available targets.

ONE-DCO-1.0-Signed-off-by: seongwoo <[email protected]>

compiler/one-cmds/onecc

@@ -79,8 +79,13 @@ def get_parser():
     parser.add_argument(
         '-b', '--backend', type=str, help='generate code for given backend')
 
-    parser.add_argument(
-        '-T', '--target', type=str, help='run with specific target of the backend')
+    target_name_list: List[str] = oneutils.get_target_list(get_name=True)
+    if not target_name_list:
+        target_help_message = '(No available target)'
+    else:
+        target_help_message = '(Available target: ' + ', '.join(target_name_list) + ')'
+    target_help_message = 'run with specific target of the backend ' + target_help_message
+    parser.add_argument('-T', '--target', type=str, help=target_help_message)
 
     # just for help message
     compile_group = parser.add_argument_group('compile to circle model')

compiler/one-cmds/onelib/utils.py

@@ -274,6 +274,43 @@ def get_optimization_list(get_name=False):
     return opt_list
 
 
+def get_target_list(get_name=False):
+    """
+    returns a list of targets. If `get_name` is True,
+    only basename without extension is returned rather than full file path.
+
+    [one hierarchy]
+    one
+    ├── backends
+    ├── bin
+    ├── doc
+    ├── include
+    ├── lib
+    ├── optimization
+    ├── target
+    └── test
+
+    Target configuration files must be placed in `target` folder
+    """
+    dir_path = os.path.dirname(os.path.realpath(__file__))
+
+    # target folder
+    files = [f for f in glob.glob(dir_path + '/../../target/*.ini', recursive=True)]
+    # exclude if the name has space
+    files = [s for s in files if not ' ' in s]
+
+    target_list = []
+    for cand in files:
+        if os.path.isfile(cand) and os.access(cand, os.R_OK):
+            target_list.append(cand)
+
+    if get_name == True:
+        target_list = [ntpath.basename(f) for f in target_list]
+        target_list = [remove_suffix(s, '.ini') for s in target_list]
+
+    return target_list
+
+
 def get_arg_parser(backend: Optional[str], cmd: str,
                    target: Optional[str]) -> Optional[ArgumentParser]:
     if not backend: