Mercurial > hg
view tests/test-bundle-phases.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 | 8e3021fd1a44 |
children | e3867c712d51 |
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$ cat >> $HGRCPATH <<EOF > [experimental] > bundle-phases=yes > [extensions] > strip= > drawdag=$TESTDIR/drawdag.py > EOF Set up repo with linear history $ hg init linear $ cd linear $ hg debugdrawdag <<'EOF' > E > | > D > | > C > | > B > | > A > EOF $ hg phase --public A $ hg phase --force --secret D $ hg log -G -T '{desc} {phase}\n' o E secret | o D secret | o C draft | o B draft | o A public Phases are restored when unbundling $ hg bundle --base B -r E bundle 3 changesets found $ hg debugbundle bundle Stream params: sortdict([('Compression', 'BZ')]) changegroup -- "sortdict([('version', '02'), ('nbchanges', '3')])" 26805aba1e600a82e93661149f2313866a221a7b f585351a92f85104bff7c284233c338b10eb1df7 9bc730a19041f9ec7cb33c626e811aa233efb18c phase-heads -- 'sortdict()' 26805aba1e600a82e93661149f2313866a221a7b draft $ hg strip --no-backup C $ hg unbundle -q bundle $ rm bundle $ hg log -G -T '{desc} {phase}\n' o E secret | o D secret | o C draft | o B draft | o A public Root revision's phase is preserved $ hg bundle -a bundle 5 changesets found $ hg strip --no-backup A $ hg unbundle -q bundle $ rm bundle $ hg log -G -T '{desc} {phase}\n' o E secret | o D secret | o C draft | o B draft | o A public Completely public history can be restored $ hg phase --public E $ hg bundle -a bundle 5 changesets found $ hg strip --no-backup A $ hg unbundle -q bundle $ rm bundle $ hg log -G -T '{desc} {phase}\n' o E public | o D public | o C public | o B public | o A public Direct transition from public to secret can be restored $ hg phase --secret --force D $ hg bundle -a bundle 5 changesets found $ hg strip --no-backup A $ hg unbundle -q bundle $ rm bundle $ hg log -G -T '{desc} {phase}\n' o E secret | o D secret | o C public | o B public | o A public Revisions within bundle preserve their phase even if parent changes its phase $ hg phase --draft --force B $ hg bundle --base B -r E bundle 3 changesets found $ hg strip --no-backup C $ hg phase --public B $ hg unbundle -q bundle $ rm bundle $ hg log -G -T '{desc} {phase}\n' o E secret | o D secret | o C draft | o B public | o A public Phase of ancestors of stripped node get advanced to accommodate child $ hg bundle --base B -r E bundle 3 changesets found $ hg strip --no-backup C $ hg phase --force --secret B $ hg unbundle -q bundle $ rm bundle $ hg log -G -T '{desc} {phase}\n' o E secret | o D secret | o C draft | o B draft | o A public Unbundling advances phases of changesets even if they were already in the repo. To test that, create a bundle of everything in draft phase and then unbundle to see that secret becomes draft, but public remains public. $ hg phase --draft --force A $ hg phase --draft E $ hg bundle -a bundle 5 changesets found $ hg phase --public A $ hg phase --secret --force E $ hg unbundle -q bundle $ rm bundle $ hg log -G -T '{desc} {phase}\n' o E draft | o D draft | o C draft | o B draft | o A public Unbundling change in the middle of a stack does not affect later changes $ hg strip --no-backup E $ hg phase --secret --force D $ hg log -G -T '{desc} {phase}\n' o D secret | o C draft | o B draft | o A public $ hg bundle --base A -r B bundle 1 changesets found $ hg unbundle -q bundle $ rm bundle $ hg log -G -T '{desc} {phase}\n' o D secret | o C draft | o B draft | o A public $ cd .. Set up repo with non-linear history $ hg init non-linear $ cd non-linear $ hg debugdrawdag <<'EOF' > D E > |\| > B C > |/ > A > EOF $ hg phase --public C $ hg phase --force --secret B $ hg log -G -T '{node|short} {desc} {phase}\n' o 03ca77807e91 E draft | | o 215e7b0814e1 D secret |/| o | dc0947a82db8 C public | | | o 112478962961 B secret |/ o 426bada5c675 A public Restore bundle of entire repo $ hg bundle -a bundle 5 changesets found $ hg debugbundle bundle Stream params: sortdict([('Compression', 'BZ')]) changegroup -- "sortdict([('version', '02'), ('nbchanges', '5')])" 426bada5c67598ca65036d57d9e4b64b0c1ce7a0 112478962961147124edd43549aedd1a335e44bf dc0947a82db884575bb76ea10ac97b08536bfa03 215e7b0814e1cac8e2614e7284f2a5dc266b4323 03ca77807e919db8807c3749086dc36fb478cac0 phase-heads -- 'sortdict()' dc0947a82db884575bb76ea10ac97b08536bfa03 public 03ca77807e919db8807c3749086dc36fb478cac0 draft $ hg strip --no-backup A $ hg unbundle -q bundle $ rm bundle $ hg log -G -T '{node|short} {desc} {phase}\n' o 03ca77807e91 E draft | | o 215e7b0814e1 D secret |/| o | dc0947a82db8 C public | | | o 112478962961 B secret |/ o 426bada5c675 A public $ hg bundle --base 'A + C' -r D bundle 2 changesets found $ hg debugbundle bundle Stream params: sortdict([('Compression', 'BZ')]) changegroup -- "sortdict([('version', '02'), ('nbchanges', '2')])" 112478962961147124edd43549aedd1a335e44bf 215e7b0814e1cac8e2614e7284f2a5dc266b4323 phase-heads -- 'sortdict()' $ rm bundle $ hg bundle --base A -r D bundle 3 changesets found $ hg debugbundle bundle Stream params: sortdict([('Compression', 'BZ')]) changegroup -- "sortdict([('version', '02'), ('nbchanges', '3')])" 112478962961147124edd43549aedd1a335e44bf dc0947a82db884575bb76ea10ac97b08536bfa03 215e7b0814e1cac8e2614e7284f2a5dc266b4323 phase-heads -- 'sortdict()' dc0947a82db884575bb76ea10ac97b08536bfa03 public $ rm bundle $ hg bundle --base 'B + C' -r 'D + E' bundle 2 changesets found $ hg debugbundle bundle Stream params: sortdict([('Compression', 'BZ')]) changegroup -- "sortdict([('version', '02'), ('nbchanges', '2')])" 215e7b0814e1cac8e2614e7284f2a5dc266b4323 03ca77807e919db8807c3749086dc36fb478cac0 phase-heads -- 'sortdict()' 03ca77807e919db8807c3749086dc36fb478cac0 draft $ rm bundle