diff hgext/sqlitestore.py @ 40387:f1a39128da95

filelog: add a hasnode() method (API)

Missing in the file storage interface is the ability to query whether
a specified value is a known node.

This commit defines that interface member and implements it on the
revlog and sqlite file stores.

Storage unit tests have been added.

The revlog implementation is a bit more complicated because index lookups
don't consistently raise the same exception. For SQLite, we can simply look
for a key in a dict.

Differential Revision: https://phab.mercurial-scm.org/D5163

--- a/hgext/sqlitestore.py	Sun Oct 21 22:26:00 2018 -0400
+++ b/hgext/sqlitestore.py	Wed Oct 03 14:57:29 2018 -0700
@@ -381,6 +381,12 @@
     def __iter__(self):
         return iter(pycompat.xrange(len(self._revisions)))
 
+    def hasnode(self, node):
+        if node == nullid:
+            return False
+
+        return node in self._nodetorev
+
     def revs(self, start=0, stop=None):
         return storageutil.iterrevs(len(self._revisions), start=start,
                                     stop=stop)