Do not overwrite target unless --overwrite is specified

Author: Robert Muchsel

README.md

@@ -1169,6 +1169,7 @@ The following table describes the most important command line arguments for `ai8
 | `--prefix`               | Set test name prefix                                         | `--prefix mnist`                |
 | `--board-name`           | Set the target board (default: `EvKit_V1`)                   | `--board-name FTHR_RevA`        |
 | *Code generation*        |                                                              |                                 |
+| `--overwrite`            | Produce output even when the target directory exists (default: abort) |                                 |
 | `--compact-data`         | Use *memcpy* to load input data in order to save code space  |                                 |
 | `--compact-weights`      | Use *memcpy* to load weights in order to save code space     |                                 |
 | `--mexpress`             | Use faster kernel loading                                    |                                 |
@@ -2125,3 +2126,4 @@ https://github.com/MaximIntegratedAI/MaximAI_Documentation/blob/master/CONTRIBUT
 
 ---
 
+o

README.pdf

@@ -70,6 +70,8 @@ def get_parser():
 
     # Code generation
     group = parser.add_argument_group('Code generation')
+    group.add_argument('--overwrite', action='store_true', default=False,
+                       help="overwrite destination if it exists (default: abort)")
     group.add_argument('--compact-data', action='store_true', default=False,
                        help="use memcpy() to load input data in order to save code space")
     group.add_argument('--compact-weights', action='store_true', default=False,
@@ -253,7 +255,7 @@ def get_parser():
 
     # Streaming
     group = parser.add_argument_group('Streaming tweaks')
-    group.add_argument('--overlap-data', '--overwrite-ok', '--allow-overwrite',
+    group.add_argument('--overlap-data',
                        dest='overwrite_ok', action='store_true', default=False,
                        help="allow output to overwrite input (default: warn/stop)")
     group.add_argument('--override-start', type=lambda x: int(x, 0), metavar='N',

izer/commandline.py

@@ -610,6 +610,7 @@ def main():
             snoop_sequence=snoop_sequence,
             simulated_sequence=simulated_sequence,
             debug_snoop=args.debug_snoop,
+            overwrite=args.overwrite,
         )
         if not args.embedded_code and args.autogen.lower() != 'none':
             rtlsim.append_regression(

izer/izer.py

@@ -168,6 +168,7 @@ def create_net(  # pylint: disable=too-many-arguments,too-many-locals,too-many-b
         snoop_sequence=None,
         simulated_sequence=None,
         debug_snoop=False,
+        overwrite=False,
 ):
     """
     Chain multiple CNN layers, create and save input and output
@@ -530,7 +531,10 @@ def create_net(  # pylint: disable=too-many-arguments,too-many-locals,too-many-b
         target_dir = os.path.join(base_directory, test_name)
         os.makedirs(target_dir, exist_ok=False)
     except OSError:
-        wprint(target_dir, 'exists')
+        if not overwrite:
+            eprint('The target folder', target_dir, 'exists. Use --overwrite to proceed.')
+        else:
+            wprint('--overwrite specified, writing to ', target_dir, ' even though it exists.')
 
     # Redirect stdout?
     if log: