Mercurial > hgsubversion
view tests/fixtures/copies.svndump @ 1550:67b28d657f62
sqliterevmap: break ".hashes()" cycle in a safer way
The `fromsvn()` revset implementation could cause weakref error when using
sqliterevmap like:
File "hgsubversion/util.py", line 357, in <lambda>
return subset.filter(lambda r: tonode(r) in hashes)
File "hgsubversion/maps.py", line 542, in __contains__
return self.get(key) != None
File "hgsubversion/maps.py", line 533, in get
for row in self.revmap._query(
ReferenceError: weakly-referenced object no longer exists
Basically the seemingly harmless assignment could break surprisingly:
# dangerous: `hashes` does not have a reference of `meta.revmap` and may
# become unavailable after `meta`, `revmap` being released by refcount.
hashes = meta.revmap.hashes()
The above syntax is nice to support while avoiding cycles is also nice.
This patch removes `revmap._hashes` so the revmap no longer owns a reference
of a `ReverseRevMap` object so the `ReverseRevMap` object no longer needs to
use weakref for `self.revmap`.
This could actually be caught by `comprehensive/test_sqlite_revmap.py`.
I was not careful enough verifying the "fromsvn()" patch.
| author | Jun Wu <quark@fb.com> |
|---|---|
| date | Thu, 21 Dec 2017 17:39:52 -0800 |
| parents | 64d961130a07 |
| children |
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SVN-fs-dump-format-version: 2 UUID: 6f377846-a035-4244-a154-e87a9351a653 Revision-number: 0 Prop-content-length: 56 Content-length: 56 K 8 svn:date V 27 2012-10-15T19:02:56.936694Z PROPS-END Revision-number: 1 Prop-content-length: 105 Content-length: 105 K 10 svn:author V 7 pmezard K 8 svn:date V 27 2012-10-15T19:02:56.958201Z K 7 svn:log V 4 init PROPS-END Node-path: trunk Node-kind: dir Node-action: add Prop-content-length: 10 Content-length: 10 PROPS-END Node-path: trunk/dir Node-kind: dir Node-action: add Prop-content-length: 10 Content-length: 10 PROPS-END Node-path: trunk/dir/a Node-kind: file Node-action: add Prop-content-length: 10 Text-content-length: 2 Text-content-md5: 60b725f10c9c85c70d97880dfe8191b3 Text-content-sha1: 3f786850e387550fdab836ed7e6dc881de23001b Content-length: 12 PROPS-END a Revision-number: 2 Prop-content-length: 123 Content-length: 123 K 10 svn:author V 7 pmezard K 8 svn:date V 27 2012-10-15T19:02:58.046478Z K 7 svn:log V 21 copy/edit trunk/dir/a PROPS-END Node-path: trunk/dir2 Node-kind: dir Node-action: add Node-copyfrom-rev: 1 Node-copyfrom-path: trunk/dir Node-path: trunk/dir2/a Node-kind: file Node-action: change Text-content-length: 4 Text-content-md5: dd8c6a395b5dd36c56d23275028f526c Text-content-sha1: 05dec960e24d918b8a73a1c53bcbbaac2ee5c2e0 Content-length: 4 a b Revision-number: 3 Prop-content-length: 119 Content-length: 119 K 10 svn:author V 7 pmezard K 8 svn:date V 27 2012-10-15T19:03:01.045897Z K 7 svn:log V 17 copy dir2 to dir3 PROPS-END Node-path: trunk/dir3 Node-kind: dir Node-action: add Node-copyfrom-rev: 2 Node-copyfrom-path: trunk/dir2 Revision-number: 4 Prop-content-length: 117 Content-length: 117 K 10 svn:author V 7 pmezard K 8 svn:date V 27 2012-10-15T19:03:03.046654Z K 7 svn:log V 15 copy and remove PROPS-END Node-path: trunk/dir3/a Node-kind: file Node-action: delete Node-path: trunk/dir3/a Node-kind: file Node-action: add Node-copyfrom-rev: 2 Node-copyfrom-path: trunk/dir2/a Text-copy-source-md5: dd8c6a395b5dd36c56d23275028f526c Text-copy-source-sha1: 05dec960e24d918b8a73a1c53bcbbaac2ee5c2e0