convert: add a mode where mercurial_sink skips empty revisions.
The getchanges function of some converter_source classes can return
some false positives. I.e. they sometimes claim that a file "foo"
was changed in some revision, even though its contents are still the
same.
convert_svn is particularly bad, but I think this can also happen with
convert_cvs and, at least in theory, with mercurial_source.
For regular conversions this is not really a problem - as long as
getfile returns the right contents, we'll get a converted revision
with the right contents. But when we use --filemap, this could lead
to superfluous revisions being converted.
Instead of fixing every converter_source, I decided to change
mercurial_sink to work around this problem.
When --filemap is used, we're interested only in revisions that touch
some specific files. If a revision doesn't change any of these files,
then we're not interested in it (at least for revisions with a single
parent; merges are special).
For mercurial_sink, we abuse this property and rollback a commit if
the manifest text hasn't changed. This avoids duplicating the logic
from localrepo.filecommit to detect unchanged files.
notify extension - No help text available
no commands defined
% commit
adding a
% clone
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% commit
% pull (minimal config)
pulling from ../a
searching for changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
Date:
Subject: changeset in test-notify/b: b
From: test
X-Hg-Notification: changeset 0647d048b600
Message-Id:
To: baz, foo@bar
changeset 0647d048b600 in test-notify/b
details: test-notify/b?cmd=changeset;node=0647d048b600
description:
b
diffs (6 lines):
diff -r cb9a9f314b8b -r 0647d048b600 a
--- a/a Thu Jan 01 00:00:00 1970 +0000
+++ b/a Thu Jan 01 00:00:01 1970 +0000
@@ -1,1 +1,2 @@ a
a
+a
(run 'hg update' to get a working copy)
% fail for config file is missing
rolling back last transaction
pull failed
% pull
rolling back last transaction
pulling from ../a
searching for changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
Date:
Subject: b
From: test@test.com
X-Hg-Notification: changeset 0647d048b600
Message-Id:
To: baz@test.com, foo@bar
changeset 0647d048b600
description:
b
diffs (6 lines):
diff -r cb9a9f314b8b -r 0647d048b600 a
--- a/a Thu Jan 01 00:00:00 1970 +0000
+++ b/a Thu Jan 01 00:00:01 1970 +0000
@@ -1,1 +1,2 @@ a
a
+a
(run 'hg update' to get a working copy)