Mercurial > hg
annotate tests/test-merge6.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> |
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date | Sat, 01 Jul 2017 10:43:29 -0700 |
parents | 2428e8ec0793 |
children | 24849d53697d |
rev | line source |
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1 $ cat <<EOF > merge |
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2 > import sys, os |
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3 > print "merging for", os.path.basename(sys.argv[1]) |
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4 > EOF |
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5 $ HGMERGE="$PYTHON ../merge"; export HGMERGE |
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7 $ hg init A1 |
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8 $ cd A1 |
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9 $ echo This is file foo1 > foo |
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10 $ echo This is file bar1 > bar |
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11 $ hg add foo bar |
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12 $ hg commit -m "commit text" |
616 | 13 |
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14 $ cd .. |
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15 $ hg clone A1 B1 |
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16 updating to branch default |
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17 2 files updated, 0 files merged, 0 files removed, 0 files unresolved |
616 | 18 |
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19 $ cd A1 |
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20 $ rm bar |
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21 $ hg remove bar |
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22 $ hg commit -m "commit test" |
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23 |
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24 $ cd ../B1 |
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25 $ echo This is file foo22 > foo |
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26 $ hg commit -m "commit test" |
616 | 27 |
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28 $ cd .. |
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29 $ hg clone A1 A2 |
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30 updating to branch default |
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31 1 files updated, 0 files merged, 0 files removed, 0 files unresolved |
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32 $ hg clone B1 B2 |
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33 updating to branch default |
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34 2 files updated, 0 files merged, 0 files removed, 0 files unresolved |
616 | 35 |
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36 $ cd A1 |
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37 $ hg pull ../B1 |
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38 pulling from ../B1 |
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39 searching for changes |
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40 adding changesets |
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41 adding manifests |
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42 adding file changes |
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43 added 1 changesets with 1 changes to 1 files (+1 heads) |
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44 (run 'hg heads' to see heads, 'hg merge' to merge) |
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45 $ hg merge |
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46 1 files updated, 0 files merged, 0 files removed, 0 files unresolved |
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47 (branch merge, don't forget to commit) |
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48 $ hg commit -m "commit test" |
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49 bar should remain deleted. |
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50 $ hg manifest --debug |
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51 f9b0e817f6a48de3564c6b2957687c5e7297c5a0 644 foo |
616 | 52 |
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53 $ cd ../B2 |
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54 $ hg pull ../A2 |
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55 pulling from ../A2 |
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56 searching for changes |
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57 adding changesets |
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58 adding manifests |
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59 adding file changes |
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60 added 1 changesets with 0 changes to 0 files (+1 heads) |
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61 (run 'hg heads' to see heads, 'hg merge' to merge) |
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62 $ hg merge |
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63 0 files updated, 0 files merged, 1 files removed, 0 files unresolved |
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64 (branch merge, don't forget to commit) |
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65 $ hg commit -m "commit test" |
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66 bar should remain deleted. |
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67 $ hg manifest --debug |
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68 f9b0e817f6a48de3564c6b2957687c5e7297c5a0 644 foo |
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69 |
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70 $ cd .. |