Check for failed example on last build

Titan-C · Titan-C · commit 5562a469c493 · 2016-05-12T18:43:53.000+02:00
plots are current verifies not to find image mark file of broken example to return True. If example has failed in previous builds, then plots are not current and the example is build from start. Fix #105 Fix #94 because first image is no longer overwritten
diff --git a/sphinx_gallery/gen_rst.py b/sphinx_gallery/gen_rst.py
@@ -312,6 +312,14 @@ def _plots_are_current(src_file, image_path):
     example"""
 
     has_image = os.path.exists(image_path)
+
+    # if example failed on previous builds
+    broken_img = image_file.format(-1)
+    if os.path.exists(broken_img):
+        has_image = False
+        # to avoid considering example as failed on future builds
+        os.remove(broken_img)
+
     src_file_changed = check_md5sum_change(src_file)
 
     return has_image and not src_file_changed
