edponce commented on a change in pull request #11978:
URL: https://github.com/apache/arrow/pull/11978#discussion_r781104442
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File path: dev/archery/archery/crossbow/core.py
##########
@@ -537,17 +537,36 @@ 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]
+ # slice the trailing date part (YYYY-MM-DD)
+ latest = latest[-10:]
+ else:
+ latest = -1
+ return latest
Review comment:
Stylistic suggestion:
```python
# slice [-10:] corresponds to the trailing date part (YYYY-MM-DD)
return sorted([m.group(0) for m in matches])[-1][-10:] if matches else -1
```
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