author | Gregory Szorc <gregory.szorc@gmail.com> |
Thu, 23 Aug 2018 18:14:19 -0700 | |
changeset 39634 | 9dffa99f9158 |
parent 35393 | 4441705b7111 |
child 40296 | e787d97e90ad |
permissions | -rw-r--r-- |
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$ hg init repo |
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$ cd repo |
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$ echo a > a |
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$ hg add a |
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$ hg commit -m test |
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Do we ever miss a sub-second change?: |
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$ for i in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20; do |
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> echo b > a |
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> hg st |
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> done |
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$ echo test > b |
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$ mkdir dir1 |
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$ echo test > dir1/c |
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$ echo test > d |
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$ echo test > e |
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#if execbit |
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A directory will typically have the execute bit -- make sure it doesn't get |
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confused with a file with the exec bit set |
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$ chmod +x e |
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#endif |
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$ hg add b dir1 d e |
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adding dir1/c |
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$ hg commit -m test2 |
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$ cat >> $TESTTMP/dirstaterace.py << EOF |
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> from mercurial import ( |
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> context, |
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> extensions, |
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> ) |
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> def extsetup(): |
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> extensions.wrapfunction(context.workingctx, '_checklookup', overridechecklookup) |
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> def overridechecklookup(orig, self, files): |
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> # make an update that changes the dirstate from underneath |
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> self._repo.ui.system(r"sh '$TESTTMP/dirstaterace.sh'", |
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> cwd=self._repo.root) |
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> return orig(self, files) |
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> EOF |
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$ hg debugrebuilddirstate |
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$ hg debugdirstate |
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n 0 -1 unset a |
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n 0 -1 unset b |
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n 0 -1 unset d |
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n 0 -1 unset dir1/c |
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n 0 -1 unset e |
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XXX Note that this returns M for files that got replaced by directories. This is |
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definitely a bug, but the fix for that is hard and the next status run is fine |
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anyway. |
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$ cat > $TESTTMP/dirstaterace.sh <<EOF |
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> rm b && rm -r dir1 && rm d && mkdir d && rm e && mkdir e |
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> EOF |
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$ hg status --config extensions.dirstaterace=$TESTTMP/dirstaterace.py |
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M d |
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M e |
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! b |
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! dir1/c |
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$ hg debugdirstate |
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n 644 2 * a (glob) |
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n 0 -1 unset b |
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n 0 -1 unset d |
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n 0 -1 unset dir1/c |
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n 0 -1 unset e |
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$ hg status |
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! b |
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! d |
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! dir1/c |
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! e |
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$ rmdir d e |
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$ hg update -C -q . |
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Test that dirstate changes aren't written out at the end of "hg |
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status", if .hg/dirstate is already changed simultaneously before |
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acquisition of wlock in workingctx._poststatusfixup(). |
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This avoidance is important to keep consistency of dirstate in race |
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condition (see issue5584 for detail). |
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$ hg parents -q |
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1:* (glob) |
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$ hg debugrebuilddirstate |
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$ hg debugdirstate |
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n 0 -1 unset a |
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n 0 -1 unset b |
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n 0 -1 unset d |
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n 0 -1 unset dir1/c |
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n 0 -1 unset e |
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$ cat > $TESTTMP/dirstaterace.sh <<EOF |
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> # This script assumes timetable of typical issue5584 case below: |
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> # |
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> # 1. "hg status" loads .hg/dirstate |
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> # 2. "hg status" confirms clean-ness of FILE |
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> # 3. "hg update -C 0" updates the working directory simultaneously |
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> # (FILE is removed, and FILE is dropped from .hg/dirstate) |
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> # 4. "hg status" acquires wlock |
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> # (.hg/dirstate is re-loaded = no FILE entry in dirstate) |
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> # 5. "hg status" marks FILE in dirstate as clean |
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> # (FILE entry is added to in-memory dirstate) |
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> # 6. "hg status" writes dirstate changes into .hg/dirstate |
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> # (FILE entry is written into .hg/dirstate) |
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> # |
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> # To reproduce similar situation easily and certainly, #2 and #3 |
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> # are swapped. "hg cat" below ensures #2 on "hg status" side. |
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> |
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> hg update -q -C 0 |
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> hg cat -r 1 b > b |
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> EOF |
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|
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"hg status" below should excludes "e", of which exec flag is set, for |
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portability of test scenario, because unsure but missing "e" is |
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treated differently in _checklookup() according to runtime platform. |
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- "missing(!)" on POSIX, "pctx[f].cmp(self[f])" raises ENOENT |
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- "modified(M)" on Windows, "self.flags(f) != pctx.flags(f)" is True |
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$ hg status --config extensions.dirstaterace=$TESTTMP/dirstaterace.py --debug -X path:e |
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skip updating dirstate: identity mismatch |
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M a |
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! d |
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! dir1/c |
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$ hg parents -q |
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0:* (glob) |
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$ hg files |
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a |
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$ hg debugdirstate |
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n * * * a (glob) |
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$ rm b |
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#if fsmonitor |
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Create fsmonitor state. |
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$ hg status |
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$ f --type .hg/fsmonitor.state |
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.hg/fsmonitor.state: file |
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Test that invalidating fsmonitor state in the middle (which doesn't require the |
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wlock) causes the fsmonitor update to be skipped. |
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hg debugrebuilddirstate ensures that the dirstaterace hook will be called, but |
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it also invalidates the fsmonitor state. So back it up and restore it. |
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$ mv .hg/fsmonitor.state .hg/fsmonitor.state.tmp |
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$ hg debugrebuilddirstate |
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$ mv .hg/fsmonitor.state.tmp .hg/fsmonitor.state |
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$ cat > $TESTTMP/dirstaterace.sh <<EOF |
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> rm .hg/fsmonitor.state |
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> EOF |
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$ hg status --config extensions.dirstaterace=$TESTTMP/dirstaterace.py --debug |
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skip updating fsmonitor.state: identity mismatch |
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$ f .hg/fsmonitor.state |
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.hg/fsmonitor.state: file not found |
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#endif |
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Set up a rebase situation for issue5581. |
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$ echo c2 > a |
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$ echo c2 > b |
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$ hg add b |
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$ hg commit -m c2 |
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created new head |
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$ echo c3 >> a |
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$ hg commit -m c3 |
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$ hg update 2 |
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1 files updated, 0 files merged, 0 files removed, 0 files unresolved |
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$ echo c4 >> a |
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$ echo c4 >> b |
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$ hg commit -m c4 |
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created new head |
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206 |
|
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Configure a merge tool that runs status in the middle of the rebase. The goal of |
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the status call is to trigger a potential bug if fsmonitor's state is written |
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even though the wlock is held by another process. The output of 'hg status' in |
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the merge tool goes to /dev/null because we're more interested in the results of |
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'hg status' run after the rebase. |
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$ cat >> $TESTTMP/mergetool-race.sh << EOF |
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> echo "custom merge tool" |
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> printf "c2\nc3\nc4\n" > \$1 |
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> hg --cwd "$TESTTMP/repo" status > /dev/null |
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> echo "custom merge tool end" |
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> EOF |
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$ cat >> $HGRCPATH << EOF |
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> [extensions] |
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> rebase = |
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> [merge-tools] |
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> test.executable=sh |
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> test.args=$TESTTMP/mergetool-race.sh \$output |
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> EOF |
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$ hg rebase -s . -d 3 --tool test |
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rebasing 4:b08445fd6b2a "c4" (tip) |
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merging a |
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custom merge tool |
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custom merge tool end |
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fsmonitor: write state with wlock held and dirstate unchanged (issue5581)
Siddharth Agarwal <sid0@fb.com>
parents:
32812
diff
changeset
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232 |
saved backup bundle to $TESTTMP/repo/.hg/strip-backup/* (glob) |
15e85dded933
fsmonitor: write state with wlock held and dirstate unchanged (issue5581)
Siddharth Agarwal <sid0@fb.com>
parents:
32812
diff
changeset
|
233 |
|
15e85dded933
fsmonitor: write state with wlock held and dirstate unchanged (issue5581)
Siddharth Agarwal <sid0@fb.com>
parents:
32812
diff
changeset
|
234 |
This hg status should be empty, whether or not fsmonitor is enabled (issue5581). |
15e85dded933
fsmonitor: write state with wlock held and dirstate unchanged (issue5581)
Siddharth Agarwal <sid0@fb.com>
parents:
32812
diff
changeset
|
235 |
|
15e85dded933
fsmonitor: write state with wlock held and dirstate unchanged (issue5581)
Siddharth Agarwal <sid0@fb.com>
parents:
32812
diff
changeset
|
236 |
$ hg status |