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.
adding a
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
diff -r 33aaa84a386b a
--- a/a
+++ b/a
@@ -1,1 +1,1 @@ a
-a
+abc
adding b
M a
changeset: 0:33aaa84a386b
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: 1
resolving manifests
overwrite False partial False
ancestor 33aaa84a386b local 33aaa84a386b+ remote 802f095af299
searching for copies back to rev 1
unmatched files in other:
b
a: versions differ -> m
b: remote created -> g
merging a
my a@33aaa84a386b+ other a@802f095af299 ancestor a@33aaa84a386b
getting b
1 files updated, 1 files merged, 0 files removed, 0 files unresolved
changeset: 1:802f095af299
tag: tip
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: 2
resolving manifests
overwrite False partial False
ancestor 33aaa84a386b local 802f095af299+ remote 33aaa84a386b
b: remote deleted -> r
removing b
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
changeset: 0:33aaa84a386b
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: 1
abort: there is nothing to merge - use "hg update" instead
failed
changeset: 0:33aaa84a386b
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: 1
resolving manifests
overwrite False partial False
ancestor 33aaa84a386b local 33aaa84a386b+ remote 802f095af299
searching for copies back to rev 1
unmatched files in other:
b
a: versions differ -> m
b: remote created -> g
merging a
my a@33aaa84a386b+ other a@802f095af299 ancestor a@33aaa84a386b
getting b
1 files updated, 1 files merged, 0 files removed, 0 files unresolved
changeset: 1:802f095af299
tag: tip
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: 2
changeset: 1:802f095af299
tag: tip
user: test
date: Mon Jan 12 13:46:40 1970 +0000
files: a b
description:
2
changeset: 0:33aaa84a386b
user: test
date: Mon Jan 12 13:46:40 1970 +0000
files: a
description:
1
diff -r 802f095af299 a
--- a/a
+++ b/a
@@ -1,1 +1,1 @@ a2
-a2
+abc
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
adding b
M a
changeset: 1:802f095af299
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: 2
abort: update spans branches, use 'hg merge' or 'hg update -C' to lose changes
failed
abort: outstanding uncommitted changes
failed
resolving manifests
overwrite False partial False
ancestor 33aaa84a386b local 802f095af299+ remote 030602aee63d
searching for copies back to rev 1
a: versions differ -> m
b: versions differ -> m
merging a
my a@802f095af299+ other a@030602aee63d ancestor a@33aaa84a386b
merging b
my b@802f095af299+ other b@030602aee63d ancestor b@000000000000
0 files updated, 2 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
changeset: 1:802f095af299
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: 2
changeset: 2:030602aee63d
tag: tip
parent: 0:33aaa84a386b
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: 3
diff -r 802f095af299 a
--- a/a
+++ b/a
@@ -1,1 +1,1 @@ a2
-a2
+abc
adding a
pulling from ../a
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
1 files updated, 0 files merged, 0 files removed, 0 files unresolved