Mercurial > hg
view tests/test-convert-hg-startrev.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 | b65966f50058 |
children | 99ebde4fec99 |
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$ cat >> $HGRCPATH <<EOF > [extensions] > convert = > [convert] > hg.saverev = yes > EOF $ glog() > { > hg -R "$1" log -G --template '{rev} "{desc}" files: {files}\n' > } $ hg init source $ cd source $ echo a > a $ echo b > b $ echo f > f $ hg ci -d '0 0' -qAm '0: add a b f' $ echo c > c $ hg move f d $ hg ci -d '1 0' -qAm '1: add c, move f to d' $ hg copy a e $ echo b >> b $ hg ci -d '2 0' -qAm '2: copy e from a, change b' $ hg up -C 0 2 files updated, 0 files merged, 3 files removed, 0 files unresolved $ echo a >> a $ hg ci -d '3 0' -qAm '3: change a' $ hg merge merging a and e to e 3 files updated, 1 files merged, 1 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg ci -d '4 0' -qAm '4: merge 2 and 3' $ echo a >> a $ hg ci -d '5 0' -qAm '5: change a' $ cd .. Convert from null revision $ hg convert --config convert.hg.startrev=null source full initializing destination full repository scanning source... sorting... converting... 5 0: add a b f 4 1: add c, move f to d 3 2: copy e from a, change b 2 3: change a 1 4: merge 2 and 3 0 5: change a $ glog full o 5 "5: change a" files: a | o 4 "4: merge 2 and 3" files: e f |\ | o 3 "3: change a" files: a | | o | 2 "2: copy e from a, change b" files: b e | | o | 1 "1: add c, move f to d" files: c d f |/ o 0 "0: add a b f" files: a b f $ rm -Rf full Convert from zero revision $ hg convert --config convert.hg.startrev=0 source full initializing destination full repository scanning source... sorting... converting... 5 0: add a b f 4 1: add c, move f to d 3 2: copy e from a, change b 2 3: change a 1 4: merge 2 and 3 0 5: change a $ glog full o 5 "5: change a" files: a | o 4 "4: merge 2 and 3" files: e f |\ | o 3 "3: change a" files: a | | o | 2 "2: copy e from a, change b" files: b e | | o | 1 "1: add c, move f to d" files: c d f |/ o 0 "0: add a b f" files: a b f Convert from merge parent $ hg convert --config convert.hg.startrev=1 source conv1 initializing destination conv1 repository scanning source... sorting... converting... 3 1: add c, move f to d 2 2: copy e from a, change b 1 4: merge 2 and 3 0 5: change a $ glog conv1 o 3 "5: change a" files: a | o 2 "4: merge 2 and 3" files: a e | o 1 "2: copy e from a, change b" files: b e | o 0 "1: add c, move f to d" files: a b c d $ cd conv1 $ hg up -q Check copy preservation $ hg st -C --change 2 e M e $ hg st -C --change 1 e A e a $ hg st -C --change 0 a A a (It seems like a bug in log that the following doesn't show rev 1.) $ hg log --follow --copies e changeset: 2:82bbac3d2cf4 user: test date: Thu Jan 01 00:00:04 1970 +0000 summary: 4: merge 2 and 3 changeset: 0:23c3be426dce user: test date: Thu Jan 01 00:00:01 1970 +0000 summary: 1: add c, move f to d Check copy removal on missing parent $ hg log --follow --copies d changeset: 0:23c3be426dce user: test date: Thu Jan 01 00:00:01 1970 +0000 summary: 1: add c, move f to d $ hg cat -r tip a b a a a b b $ hg -q verify $ cd .. Convert from merge $ hg convert --config convert.hg.startrev=4 source conv4 initializing destination conv4 repository scanning source... sorting... converting... 1 4: merge 2 and 3 0 5: change a $ glog conv4 o 1 "5: change a" files: a | o 0 "4: merge 2 and 3" files: a b c d e $ cd conv4 $ hg up -C 5 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg cat -r tip a b a a a b b $ hg -q verify $ cd .. Convert from revset in convert.hg.revs $ hg convert --config convert.hg.revs='3:4+0' source revsetrepo initializing destination revsetrepo repository scanning source... sorting... converting... 2 0: add a b f 1 3: change a 0 4: merge 2 and 3 $ glog revsetrepo o 2 "4: merge 2 and 3" files: b c d e f | o 1 "3: change a" files: a | o 0 "0: add a b f" files: a b f Convert from specified revs $ hg convert --rev 3 --rev 2 source multiplerevs initializing destination multiplerevs repository scanning source... sorting... converting... 3 0: add a b f 2 1: add c, move f to d 1 2: copy e from a, change b 0 3: change a $ glog multiplerevs o 3 "3: change a" files: a | | o 2 "2: copy e from a, change b" files: b e | | | o 1 "1: add c, move f to d" files: c d f |/ o 0 "0: add a b f" files: a b f Convert in multiple steps that doesn't overlap - the link to the parent is preserved anyway $ hg convert --config convert.hg.revs=::1 source multistep initializing destination multistep repository scanning source... sorting... converting... 1 0: add a b f 0 1: add c, move f to d $ hg convert --config convert.hg.revs=2 source multistep scanning source... sorting... converting... 0 2: copy e from a, change b $ glog multistep o 2 "2: copy e from a, change b" files: b e | o 1 "1: add c, move f to d" files: c d f | o 0 "0: add a b f" files: a b f