prune: fix checkpoints processing with --glob-archives

before the fix, the archives_checkpoints list could not always contain
checkpoints as the glob regex matched the end of the name, so there
could be no additional ".checkpoint" after the match.

src/borg/archiver.py

@@ -1476,8 +1476,11 @@ class Archiver:
             return self.exit_code
         if args.prefix:
             args.glob_archives = args.prefix + '*'
-        archives_checkpoints = manifest.archives.list(glob=args.glob_archives, sort_by=['ts'], reverse=True)
-        is_checkpoint = re.compile(r'\.checkpoint(\.\d+)?$').search
+        checkpoint_re = r'\.checkpoint(\.\d+)?'
+        archives_checkpoints = manifest.archives.list(glob=args.glob_archives,
+                                                      match_end=r'(%s)?\Z' % checkpoint_re,
+                                                      sort_by=['ts'], reverse=True)
+        is_checkpoint = re.compile(r'(%s)\Z' % checkpoint_re).search
         checkpoints = [arch for arch in archives_checkpoints if is_checkpoint(arch.name)]
         # keep the latest checkpoint, if there is no later non-checkpoint archive
         if archives_checkpoints and checkpoints and archives_checkpoints[0] is checkpoints[0]:

src/borg/helpers.py

@@ -219,18 +219,18 @@ class Archives(abc.MutableMapping):
         name = safe_encode(name)
         del self._archives[name]
 
-    def list(self, *, glob=None, sort_by=(), first=None, last=None, reverse=False):
+    def list(self, *, glob=None, match_end=r'\Z', sort_by=(), first=None, last=None, reverse=False):
         """
         Return list of ArchiveInfo instances according to the parameters.
 
-        First match *glob*, then *sort_by*. Apply *first* and *last* filters,
-        and possibly *reverse* the list.
+        First match *glob* (considering *match_end*), then *sort_by*.
+        Apply *first* and *last* filters, and then possibly *reverse* the list.
 
         *sort_by* is a list of sort keys applied in reverse order.
         """
         if isinstance(sort_by, (str, bytes)):
             raise TypeError('sort_by must be a sequence of str')
-        regex = re.compile(shellpattern.translate(glob or '*'))
+        regex = re.compile(shellpattern.translate(glob or '*', match_end=match_end))
         archives = [x for x in self.values() if regex.match(x.name) is not None]
         for sortkey in reversed(sort_by):
             archives.sort(key=attrgetter(sortkey))