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view tests/test-merge-local.t @ 33289:abd7dedbaa36
sparse: vendor Facebook-developed extension
Facebook has developed an extension to enable "sparse" checkouts -
a working directory with a subset of files. This feature is a critical
component in enabling repositories to scale to infinite number of
files while retaining reasonable performance. It's worth noting
that sparse checkout is only one possible solution to this problem:
another is virtual filesystems that realize files on first access.
But given that virtual filesystems may not be accessible to all
users, sparse checkout is necessary as a fallback.
Per mailing list discussion at
https://www.mercurial-scm.org/pipermail/mercurial-devel/2017-March/095868.html
we want to add sparse checkout to the Mercurial distribution via
roughly the following mechanism:
1. Vendor extension as-is with minimal modifications (this patch)
2. Refactor extension so it is more clearly experimental and inline
with Mercurial practices
3. Move code from extension into core where possible
4. Drop experimental labeling and/or move feature into core
after sign-off from narrow clone feature owners
This commit essentially copies the sparse extension and tests
from revision 71e0a2aeca92a4078fe1b8c76e32c88ff1929737 of the
https://bitbucket.org/facebook/hg-experimental repository.
A list of modifications made as part of vendoring is as follows:
* "EXPERIMENTAL" added to module docstring
* Imports were changed to match Mercurial style conventions
* "testedwith" value was updated to core Mercurial special value and
comment boilerplate was inserted
* A "clone_sparse" function was renamed to "clonesparse" to appease
the style checker
* Paths to the sparse extension in tests reflect built-in location
* test-sparse-extensions.t was renamed to test-sparse-fsmonitor.t
and references to "simplecache" were removed. The test always skips
because it isn't trivial to run it given the way we currently run
fsmonitor tests
* A double empty line was removed from test-sparse-profiles.t
There are aspects of the added code that are obviously not ideal.
The goal is to make a minimal number of modifications as part of
the vendoring to make it easier to track changes from the original
implementation. Refactoring will occur in subsequent patches.
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Sat, 01 Jul 2017 10:43:29 -0700 |
parents | 69ffbbe73dd0 |
children | 9e4f82bc2b0b |
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$ hg init Revision 0: $ echo "unchanged" > unchanged $ echo "remove me" > remove $ echo "copy me" > copy $ echo "move me" > move $ for i in 1 2 3 4 5 6 7 8 9; do > echo "merge ok $i" >> zzz1_merge_ok > done $ echo "merge bad" > zzz2_merge_bad $ hg ci -Am "revision 0" adding copy adding move adding remove adding unchanged adding zzz1_merge_ok adding zzz2_merge_bad Revision 1: $ hg rm remove $ hg mv move moved $ hg cp copy copied $ echo "added" > added $ hg add added $ echo "new first line" > zzz1_merge_ok $ hg cat zzz1_merge_ok >> zzz1_merge_ok $ echo "new last line" >> zzz2_merge_bad $ hg ci -m "revision 1" Local changes to revision 0: $ hg co 0 4 files updated, 0 files merged, 3 files removed, 0 files unresolved $ echo "new last line" >> zzz1_merge_ok $ echo "another last line" >> zzz2_merge_bad $ hg diff --nodates | grep "^[+-][^<>]" --- a/zzz1_merge_ok +++ b/zzz1_merge_ok +new last line --- a/zzz2_merge_bad +++ b/zzz2_merge_bad +another last line $ hg st M zzz1_merge_ok M zzz2_merge_bad Local merge with bad merge tool: $ HGMERGE=false hg co merging zzz1_merge_ok merging zzz2_merge_bad merging zzz2_merge_bad failed! 3 files updated, 1 files merged, 2 files removed, 1 files unresolved use 'hg resolve' to retry unresolved file merges [1] $ hg resolve -m (no more unresolved files) $ hg co 0 merging zzz1_merge_ok merging zzz2_merge_bad warning: conflicts while merging zzz2_merge_bad! (edit, then use 'hg resolve --mark') 2 files updated, 1 files merged, 3 files removed, 1 files unresolved use 'hg resolve' to retry unresolved file merges [1] $ hg diff --nodates | grep "^[+-][^<>]" --- a/zzz1_merge_ok +++ b/zzz1_merge_ok +new last line --- a/zzz2_merge_bad +++ b/zzz2_merge_bad +another last line +======= $ hg st M zzz1_merge_ok M zzz2_merge_bad ? zzz2_merge_bad.orig Local merge with conflicts: $ hg resolve -m (no more unresolved files) $ hg co merging zzz1_merge_ok merging zzz2_merge_bad warning: conflicts while merging zzz2_merge_bad! (edit, then use 'hg resolve --mark') 3 files updated, 1 files merged, 2 files removed, 1 files unresolved use 'hg resolve' to retry unresolved file merges [1] $ hg resolve -m (no more unresolved files) $ hg co 0 --config 'ui.origbackuppath=.hg/origbackups' merging zzz1_merge_ok merging zzz2_merge_bad warning: conflicts while merging zzz2_merge_bad! (edit, then use 'hg resolve --mark') 2 files updated, 1 files merged, 3 files removed, 1 files unresolved use 'hg resolve' to retry unresolved file merges [1] Are orig files from the last commit where we want them? $ ls .hg/origbackups zzz2_merge_bad.orig $ hg diff --nodates | grep "^[+-][^<>]" --- a/zzz1_merge_ok +++ b/zzz1_merge_ok +new last line --- a/zzz2_merge_bad +++ b/zzz2_merge_bad +another last line +======= +======= +new last line +======= $ hg st M zzz1_merge_ok M zzz2_merge_bad ? zzz2_merge_bad.orig Local merge without conflicts: $ hg revert zzz2_merge_bad $ hg resolve -m (no more unresolved files) $ hg co merging zzz1_merge_ok 4 files updated, 1 files merged, 2 files removed, 0 files unresolved $ hg diff --nodates | grep "^[+-][^<>]" --- a/zzz1_merge_ok +++ b/zzz1_merge_ok +new last line $ hg st M zzz1_merge_ok ? zzz2_merge_bad.orig