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convert: add a mode where mercurial_sink skips empty revisions....
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.
Matt Mackall - - Load All Authors

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r3311:96663230 default
r5378:8a2915f5 default
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test-filebranch.out
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creating base
4 files updated, 0 files merged, 0 files removed, 0 files unresolved
creating branch a
creating branch b
we shouldn't have anything but n state here
n 644 2 bar
n 644 3 baz
n 644 3 foo
n 644 2 quux
merging
pulling from ../a
searching for changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 2 changes to 2 files (+1 heads)
(run 'hg heads' to see heads, 'hg merge' to merge)
merging for foo
resolving manifests
getting bar
merging foo
1 files updated, 1 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
we shouldn't have anything but foo in merge state here
m 644 3 foo
main: we should have a merge here
rev offset length base linkrev nodeid p1 p2
0 0 77 0 0 c36078bec30d 000000000000 000000000000
1 77 73 1 1 182b283965f1 c36078bec30d 000000000000
2 150 71 2 2 a6aef98656b7 c36078bec30d 000000000000
3 221 72 3 3 0c2cc6fc80e2 182b283965f1 a6aef98656b7
log should show foo and quux changed
changeset: 3:0c2cc6fc80e2
tag: tip
parent: 1:182b283965f1
parent: 2:a6aef98656b7
user: test
date: Mon Jan 12 13:46:40 1970 +0000
files: foo quux
description:
merge
foo: we should have a merge here
rev offset length base linkrev nodeid p1 p2
0 0 3 0 0 b8e02f643373 000000000000 000000000000
1 3 4 1 1 2ffeddde1b65 b8e02f643373 000000000000
2 7 4 2 2 33d1fb69067a b8e02f643373 000000000000
3 11 4 3 3 aa27919ee430 2ffeddde1b65 33d1fb69067a
bar: we shouldn't have a merge here
rev offset length base linkrev nodeid p1 p2
0 0 3 0 0 b8e02f643373 000000000000 000000000000
1 3 4 1 2 33d1fb69067a b8e02f643373 000000000000
baz: we shouldn't have a merge here
rev offset length base linkrev nodeid p1 p2
0 0 3 0 0 b8e02f643373 000000000000 000000000000
1 3 4 1 1 2ffeddde1b65 b8e02f643373 000000000000
quux: we shouldn't have a merge here
rev offset length base linkrev nodeid p1 p2
0 0 3 0 0 b8e02f643373 000000000000 000000000000
1 3 5 1 3 6128c0f33108 b8e02f643373 000000000000
manifest entries should match tips of all files
33d1fb69067a0139622a3fa3b7ba1cdb1367972e 644 bar
2ffeddde1b65b4827f6746174a145474129fa2ce 644 baz
aa27919ee4303cfd575e1fb932dd64d75aa08be4 644 foo
6128c0f33108e8cfbb4e0824d13ae48b466d7280 644 quux
everything should be clean now
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
4 files, 4 changesets, 10 total revisions