EDM Products

@@ -26,11 +26,20 @@ _GIT = (
 
 
 def _has_changes(*, src_repo: str) -> bool:
- cmd = (
+ # Without updating the index, diff-index may say that there
+ # are changes when there are not.
+ # For example, if a file has been written to but its contents
+ # have not changed.
+ update_index_cmd = (
+ *_GIT, '-C', src_repo, 'update-index', '--refresh',
+ )
+ subprocess.call(update_index_cmd)
+
+ diff_index_cmd = (
  *_GIT, '-C', src_repo, 'diff-index',
  '--quiet', '--no-ext-diff', 'HEAD', '--',
  )
- return subprocess.call(cmd) == 1
+ return subprocess.call(diff_index_cmd) == 1
 
 
 def _rev_parse(*, repo: str, ref: str) -> str: