Mercurial > hg
annotate tests/test-hooklib-enforce_draft_commits.t @ 48507:58a3be48ddd2
simplemerge: stop merging file flags
As 384df4db6520 (merge: merge file flags together with file content,
2013-01-09) explains, we shouldn't do a 3-way merge of the
symlink. However, since 84614212ae39 (flags: actually merge flags in
simplemerge, 2020-05-16), we do that in
`simplemerge.simplemerge()`. What's more, the merging of the
executable flag there isn't actually necessary; it was made a no-op by
the very next commit, i.e. 4234c9af515d (flags: read flag from
dirstate/disk for workingcopyctx (issue5743), 2020-05-16).
I found the overall flag-merging code (not the bit in
`simplemerge.py`) very hard to follow, but I think I now finally
understand how it works. `mergestate.resolve()` calculates the merged
file flags and sets them on the local side of the merge (confusingly
by calling `_restore_backup()`). Then it calls
`filemerge.filemerge()`, which in turn calls
`simplemerge.simplemerge()` (if premerge is enabled). That means that
the flags on the local side `fcs.flags()` are already correct when the
flag-merging code in `simplemerge.simplemerge()` runs. Interestingly,
that code still works when the local side already has the merged
value, it just doesn't change the value. Here's a truth table to
explain why:
```
BLOMCAR
0000000
0011111
0101011
0111111
1000000
1010000
1100000
1111101
```
B: Base
L: Local
O: Other
M: Merged flags from `mergestate.resolve()`, i.e. what's called "local"
when we get to `simplemerge.simplemerge()`
C: `commonflags` in `simplemerge.simplemerge()`, i.e. `M & O`
A: `addedflags` in `simplemerge.simplemerge()`, i.e. `(M ^ O) - B`
R: Re-merged flags `simplemerge.simplemerge()`, i.e. `C | A`
As you can see, the re-merged flags are always unchanged compared to
the initial merged flags (R equals M).
Therefore, this patch effectively backs out 84614212ae39. (I might
later refactor this code to have the flags explicitly passed in.)
`simplemerge.simplemerge()` is also called from
`contrib/simplemerge.py`, but that code never passes any flags.
Differential Revision: https://phab.mercurial-scm.org/D11879
author | Martin von Zweigbergk <martinvonz@google.com> |
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date | Mon, 06 Dec 2021 23:17:43 -0800 |
parents | 4cabeea6d214 |
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rev | line source |
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1 $ cat <<EOF >> $HGRCPATH |
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2 > [extensions] |
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3 > hooklib = |
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4 > |
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5 > [phases] |
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6 > publish = False |
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7 > EOF |
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8 $ hg init a |
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9 $ hg --cwd a debugbuilddag . |
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10 $ hg --cwd a phase --public 0 |
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11 $ hg init b |
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12 $ cat <<EOF >> b/.hg/hgrc |
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13 > [hooks] |
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14 > pretxnclose-phase.enforce_draft_commits = \ |
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15 > python:hgext.hooklib.enforce_draft_commits.hook |
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16 > EOF |
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17 $ hg --cwd b pull ../a |
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18 pulling from ../a |
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19 requesting all changes |
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20 adding changesets |
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21 adding manifests |
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22 adding file changes |
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23 error: pretxnclose-phase.enforce_draft_commits hook failed: New changeset 1ea73414a91b in phase 'public' rejected |
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24 transaction abort! |
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25 rollback completed |
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26 abort: New changeset 1ea73414a91b in phase 'public' rejected |
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27 [255] |
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28 $ hg --cwd a phase --force --draft 0 |
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29 $ hg --cwd b pull ../a |
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30 pulling from ../a |
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31 requesting all changes |
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32 adding changesets |
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33 adding manifests |
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34 adding file changes |
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35 added 1 changesets with 0 changes to 0 files |
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36 new changesets 1ea73414a91b (1 drafts) |
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37 (run 'hg update' to get a working copy) |
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38 $ hg --cwd a phase --public 0 |
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39 $ hg --cwd b pull ../a |
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40 pulling from ../a |
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41 searching for changes |
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42 no changes found |
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43 error: pretxnclose-phase.enforce_draft_commits hook failed: Phase change from 'draft' to 'public' for 1ea73414a91b rejected |
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44 abort: Phase change from 'draft' to 'public' for 1ea73414a91b rejected |
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45 [255] |