If files of same name pattern exist, count up from their iterators rather than abort.

diff --git a/stable.py b/stable.py
index e739d367a63db0e6667434943c82070f3d1e9a62..694b2505449bbb94b21cf645bf0c51067b259c87 100755 (executable)
--- a/stable.py
+++ b/stable.py
@@ -1,6 +1,7 @@
 #!/usr/bin/env python3
 from sys import argv, exit as sys_exit, stdin
-from os.path import dirname, basename, splitext, join as path_join, exists
+from os import listdir
+from os.path import dirname, basename, splitext, join as path_join
 from argparse import ArgumentParser, ArgumentDefaultsHelpFormatter
 from random import randint
 from datetime import datetime
@@ -97,24 +98,32 @@ def parse_args():
 
 def run():
 
-    def save_path(count: int) -> str:
-        n_iterations = len(args.gen_paramses) * args.quantity
-        filename_count = f'_{count:08}' if n_iterations > 1 else ''
-        # pylint: disable=possibly-used-before-assignment
-        return path_join(dir_path,
-                         f'{filename_sans_ext}{filename_count}.{ext}')
-
     # guard against overwriting
     args = parse_args()
+    paths_to_write = []
     if not args.list_schedulers:
-        dir_path = dirname(args.output)
+        dir_path = dirname(args.output) if dirname(args.output) else '.'
         filename = basename(args.output)
         filename_sans_ext, ext = splitext(filename)
-        ext = ext[1:] if ext else 'png'
+        ext = ext if ext else '.png'
+        filename_with_ext = f'{filename_sans_ext}{ext}'
+        start_at_idx = 0
+        for fn in list(listdir(dir_path)):
+            if filename_with_ext == fn:
+                start_at_idx = max(start_at_idx, 1)
+            fn_sans_ext, ext_ = splitext(fn)
+            if ext_ != ext:
+                continue
+            if fn_sans_ext[:-8] == f'{filename_sans_ext}_' and\
+                    set(c in '0123456789' for c in fn_sans_ext[-8:]) == {1}:
+                start_at_idx = max(start_at_idx, int(fn_sans_ext[-8:]) + 1)
         for n in range(args.quantity * len(args.gen_paramses)):
-            path = save_path(n)
-            if exists(path):
-                raise Exception(f'Would overwrite file: {path}')
+            filename_count = ''
+            if start_at_idx + n > 0\
+                    or args.quantity * len(args.gen_paramses) > 1:
+                filename_count = f'_{start_at_idx+n:08}'
+            filename = f'{filename_sans_ext}{filename_count}{ext}'
+            paths_to_write += [path_join(dir_path, filename)]
 
     # pylint: disable=wrong-import-position, import-outside-toplevel
     from stable.core import ImageMaker  # noqa: E402
@@ -141,11 +150,12 @@ def run():
         start_seed = start_seed if start_seed != 0 else randint(SEED_MIN,
                                                                 SEED_MAX)
         seed_corrector = 0
+        path_idx = 0
         for n in range(args.quantity):
             if 0 == start_seed + n + seed_corrector:
                 seed_corrector += 1
             gen_params.seed = start_seed + n + seed_corrector
-            path = save_path(i*args.quantity + n)
+            path = paths_to_write[path_idx]
             maker.set_gen_params(gen_params)
             index = i*args.quantity + n + 1
             until_now = datetime.now() - start_time
@@ -155,6 +165,7 @@ def run():
                   f'estimated time left: {str(until_end)[:-7]}): '
                   f'{path}; {gen_params.to_str}')
             maker.gen_image_to(path)
+            path_idx += 1
 
 
 run()