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patch: support diff data loss detection and upgrade...
patch: support diff data loss detection and upgrade In worst case, generating diff in upgrade mode can be two times more expensive than generating it in git mode directly: we may have to regenerate the whole diff again whenever a git feature is detected. Also, the first diff attempt is completely buffered instead of being streamed. That said, even without having profiled it yet, I am convinced we can fast-path the upgrade mode if necessary were it to be used in regular diff commands, and not only in mq where avoiding data loss is worth the price.

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test-convert-git.out
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/ tests / test-convert-git.out
rm 'd/b'
assuming destination git-repo-hg
initializing destination git-repo-hg repository
scanning source...
sorting...
converting...
5 t1
4 t2
3 t3
2 t4.1
1 t4.2
0 Merge branch other
changeset: 5:c78094926be2
tag: tip
parent: 3:f5f5cb45432b
parent: 4:4e174f80c67c
user: test <test@example.org>
date: Mon Jan 01 00:00:15 2007 +0000
files: a
description:
Merge branch other
% full conversion
@ 9 "Discard change to foo" files: foo
|\
| o 8 "change foo" files: foo
| |
o | 7 "change bar" files: bar
|/
o 6 "(octopus merge fixup)" files:
|\
| o 5 "Octopus merge" files: baz
| |\
o | | 4 "add baz" files: baz
| | |
+---o 3 "add bar" files: bar
| |
o | 2 "add quux" files: quux
| |
| o 1 "change foo" files: foo
|/
o 0 "add foo" files: foo
245a3b8bc653999c2b22cdabd517ccb47aecafdf 644 bar
354ae8da6e890359ef49ade27b68bbc361f3ca88 644 baz
9277c9cc8dd4576fc01a17939b4351e5ada93466 644 foo
88dfeab657e8cf2cef3dec67b914f49791ae76b1 644 quux
% foo bar baz: octopus merge
@ 8 "Discard change to foo" files: foo
|\
| o 7 "change foo" files: foo
| |
o | 6 "change bar" files: bar
|/
o 5 "(octopus merge fixup)" files:
|\
| o 4 "Octopus merge" files: baz
| |\
o | | 3 "add baz" files: baz
| | |
+---o 2 "add bar" files: bar
| |
| o 1 "change foo" files: foo
|/
o 0 "add foo" files: foo
245a3b8bc653999c2b22cdabd517ccb47aecafdf 644 bar
354ae8da6e890359ef49ade27b68bbc361f3ca88 644 baz
9277c9cc8dd4576fc01a17939b4351e5ada93466 644 foo
% foo baz quux: only some parents of an octopus merge; "discard" a head
@ 6 "Discard change to foo" files: foo
|
o 5 "change foo" files: foo
|
o 4 "Octopus merge" files:
|\
| o 3 "add baz" files: baz
| |
| o 2 "add quux" files: quux
| |
o | 1 "change foo" files: foo
|/
o 0 "add foo" files: foo
354ae8da6e890359ef49ade27b68bbc361f3ca88 644 baz
9277c9cc8dd4576fc01a17939b4351e5ada93466 644 foo
88dfeab657e8cf2cef3dec67b914f49791ae76b1 644 quux
% test binary conversion (issue 1359)
% convert binary file
initializing destination git-repo3-hg repository
scanning source...
sorting...
converting...
0 addbinary
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
4096
% test author vs committer
% convert author committer
initializing destination git-repo4-hg repository
scanning source...
sorting...
converting...
1 addfoo
0 addfoo2
changeset: 1:d63e967f93da
tag: tip
user: nottest <test@example.org>
date: Mon Jan 01 00:00:21 2007 +0000
files: foo
description:
addfoo2
committer: test <test@example.org>
changeset: 0:0735477b0224
user: test <test@example.org>
date: Mon Jan 01 00:00:20 2007 +0000
files: foo
description:
addfoo
% --sourceorder should fail
initializing destination git-repo4-sourcesort-hg repository
abort: --sourcesort is not supported by this data source