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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.
author Alexis S. L. Carvalho <alexis@cecm.usp.br>
date Thu, 04 Oct 2007 23:21:37 -0300
parents 5a4824f6665c
children
line wrap: on
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% no working directory
adding a
adding b
adding c
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
adding c
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
% hg parents
changeset:   3:02d851b7e549
user:        test
date:        Thu Jan 01 00:00:03 1970 +0000
summary:     c

% hg parents a
changeset:   1:d786049f033a
user:        test
date:        Thu Jan 01 00:00:01 1970 +0000
summary:     a

% hg parents c, single revision
changeset:   3:02d851b7e549
user:        test
date:        Thu Jan 01 00:00:03 1970 +0000
summary:     c

% hg parents -r 3 c
abort: 'c' not found in manifest!
% hg parents -r 2
changeset:   1:d786049f033a
user:        test
date:        Thu Jan 01 00:00:01 1970 +0000
summary:     a

% hg parents -r 2 a
changeset:   1:d786049f033a
user:        test
date:        Thu Jan 01 00:00:01 1970 +0000
summary:     a

% hg parents -r 2 ../a
abort: ../a not under root
% cd dir; hg parents -r 2 ../a
changeset:   1:d786049f033a
user:        test
date:        Thu Jan 01 00:00:01 1970 +0000
summary:     a

% hg parents -r 2 path:a
changeset:   1:d786049f033a
user:        test
date:        Thu Jan 01 00:00:01 1970 +0000
summary:     a

% hg parents -r 2 glob:a
abort: can only specify an explicit file name
% merge working dir with 2 parents, hg parents c
merging c
0 files updated, 1 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
changeset:   3:02d851b7e549
user:        test
date:        Thu Jan 01 00:00:03 1970 +0000
summary:     c

changeset:   4:48cee28d4b4e
tag:         tip
parent:      1:d786049f033a
user:        test
date:        Thu Jan 01 00:00:04 1970 +0000
summary:     c2

% merge working dir with 1 parent, hg parents
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
changeset:   2:6cfac479f009
user:        test
date:        Thu Jan 01 00:00:02 1970 +0000
summary:     b

changeset:   4:48cee28d4b4e
tag:         tip
parent:      1:d786049f033a
user:        test
date:        Thu Jan 01 00:00:04 1970 +0000
summary:     c2

% merge working dir with 1 parent, hg parents c
changeset:   4:48cee28d4b4e
tag:         tip
parent:      1:d786049f033a
user:        test
date:        Thu Jan 01 00:00:04 1970 +0000
summary:     c2