[GitHub] [arrow] edponce commented on a change in pull request #11978: ARROW-15137: [Dev] Update archery crossbow latest-prefix to work with nightly dates

[GitBox <gi...@apache.org>]

edponce commented on a change in pull request #11978:
URL: https://github.com/apache/arrow/pull/11978#discussion_r780838857



##########
File path: dev/archery/archery/crossbow/core.py
##########
@@ -536,17 +536,34 @@ def _latest_prefix_id(self, prefix):
             latest = -1
         return latest
 
+    def _latest_prefix_date(self, prefix):
+        pattern = re.compile(r'[\w\/-]*{}-(\d+)-(\d+)-(\d+)'.format(prefix))
+        matches = list(filter(None, map(pattern.match, self.repo.branches)))
+        if matches:
+            latest = sorted([m.group(0) for m in matches])[-1][-10:]

Review comment:
       I am not sure what the `[-10:]` pertains to, so maybe add a comment. Or could this be extracted using regex for more generality?




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