Mercurial > hg
view tests/test-mq-qpush-exact.t @ 30446:b324b4e431e5
posix: give checkexec a fast path; keep the check files and test read only
Before, Mercurial would create a new temporary file every time, stat it, change
its exec mode, stat it again, and delete it. Most of this dance was done to
handle the rare and not-so-essential case of VFAT mounts on unix. The cost of
that was paid by the much more common and important case of using normal file
systems.
Instead, try to create and preserve .hg/cache/checkisexec and
.hg/cache/checknoexec with and without exec flag set. If the files exist and
have correct exec flags set, we can conclude that that file system supports the
exec flag. Best case, the whole exec check can thus be done with two stat
calls. Worst case, we delete the wrong files and check as usual. That will be
because temporary loss of exec bit or on file systems without support for the
exec bit. In that case we check as we did before, with the additional overhead
of one extra stat call.
It is possible that this different test algorithm in some cases on odd file
systems will give different behaviour. Again, I think it will be rare and
special cases and I think it is worth the risk.
test-clone.t happens to show the situation where checkisexec is left behind
from the old style check, while checknoexec only will be created next time a
exec check will be performed.
| author | Mads Kiilerich <madski@unity3d.com> |
|---|---|
| date | Wed, 14 Jan 2015 01:15:26 +0100 |
| parents | bbf544b5f2e9 |
| children |
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$ echo "[extensions]" >> $HGRCPATH $ echo "mq=" >> $HGRCPATH make a test repository that looks like this: o 2:28bc7b1afd6a | | @ 1:d7fe2034f71b |/ o 0/62ecad8b70e5 $ hg init r0 $ cd r0 $ touch f0 $ hg ci -m0 -Aq $ touch f1 $ hg ci -m1 -Aq $ hg update 0 -q $ touch f2 $ hg ci -m2 -Aq $ hg update 1 -q make some patches with a parent: 1:d7fe2034f71b -> p0 -> p1 $ echo cp0 >> fp0 $ hg add fp0 $ hg ci -m p0 -d "0 0" $ hg export -r. > p0 $ hg strip -qn . $ hg qimport p0 adding p0 to series file $ hg qpush applying p0 now at: p0 $ echo cp1 >> fp1 $ hg add fp1 $ hg qnew p1 -d "0 0" $ hg qpop -aq patch queue now empty qpush --exact when at the parent $ hg update 1 -q $ hg qpush -e applying p0 now at: p0 $ hg parents -qr qbase 1:d7fe2034f71b $ hg qpop -aq patch queue now empty $ hg qpush -e p0 applying p0 now at: p0 $ hg parents -qr qbase 1:d7fe2034f71b $ hg qpop -aq patch queue now empty $ hg qpush -e p1 applying p0 applying p1 now at: p1 $ hg parents -qr qbase 1:d7fe2034f71b $ hg qpop -aq patch queue now empty qpush --exact when at another rev $ hg update 0 -q $ hg qpush -e 1 files updated, 0 files merged, 0 files removed, 0 files unresolved applying p0 now at: p0 $ hg parents -qr qbase 1:d7fe2034f71b $ hg qpop -aq patch queue now empty $ hg update 0 -q $ hg qpush -e p0 1 files updated, 0 files merged, 0 files removed, 0 files unresolved applying p0 now at: p0 $ hg parents -qr qbase 1:d7fe2034f71b $ hg qpop -aq patch queue now empty $ hg update 0 -q $ hg qpush -e p1 1 files updated, 0 files merged, 0 files removed, 0 files unresolved applying p0 applying p1 now at: p1 $ hg parents -qr qbase 1:d7fe2034f71b $ hg qpop -aq patch queue now empty $ hg update 0 -q $ hg qpush -ea 1 files updated, 0 files merged, 0 files removed, 0 files unresolved applying p0 applying p1 now at: p1 $ hg parents -qr qbase 1:d7fe2034f71b $ hg qpop -aq patch queue now empty qpush --exact while crossing branches $ hg update 2 -q $ hg qpush -e 1 files updated, 0 files merged, 1 files removed, 0 files unresolved applying p0 now at: p0 $ hg parents -qr qbase 1:d7fe2034f71b $ hg qpop -aq patch queue now empty $ hg update 2 -q $ hg qpush -e p0 1 files updated, 0 files merged, 1 files removed, 0 files unresolved applying p0 now at: p0 $ hg parents -qr qbase 1:d7fe2034f71b $ hg qpop -aq patch queue now empty $ hg update 2 -q $ hg qpush -e p1 1 files updated, 0 files merged, 1 files removed, 0 files unresolved applying p0 applying p1 now at: p1 $ hg parents -qr qbase 1:d7fe2034f71b $ hg qpop -aq patch queue now empty $ hg update 2 -q $ hg qpush -ea 1 files updated, 0 files merged, 1 files removed, 0 files unresolved applying p0 applying p1 now at: p1 $ hg parents -qr qbase 1:d7fe2034f71b $ hg qpop -aq patch queue now empty qpush --exact --force with changes to an unpatched file $ hg update 1 -q $ echo c0 >> f0 $ hg qpush -e abort: local changes found [255] $ hg qpush -ef applying p0 now at: p0 $ cat f0 c0 $ rm f0 $ touch f0 $ hg qpop -aq patch queue now empty $ hg update 1 -q $ echo c0 >> f0 $ hg qpush -e p1 abort: local changes found [255] $ hg qpush -e p1 -f applying p0 applying p1 now at: p1 $ cat f0 c0 $ rm f0 $ touch f0 $ hg qpop -aq patch queue now empty qpush --exact --force with changes to a patched file $ hg update 1 -q $ echo cp0-bad >> fp0 $ hg add fp0 $ hg qpush -e abort: local changes found [255] $ hg qpush -ef applying p0 file fp0 already exists 1 out of 1 hunks FAILED -- saving rejects to file fp0.rej patch failed, unable to continue (try -v) patch failed, rejects left in working directory errors during apply, please fix and qrefresh p0 [2] $ cat fp0 cp0-bad $ cat fp0.rej --- fp0 +++ fp0 @@ -0,0 +1,1 @@ +cp0 $ hg qpop -aqf patch queue now empty $ rm fp0 $ rm fp0.rej $ hg update 1 -q $ echo cp1-bad >> fp1 $ hg add fp1 $ hg qpush -e p1 abort: local changes found [255] $ hg qpush -e p1 -f applying p0 applying p1 file fp1 already exists 1 out of 1 hunks FAILED -- saving rejects to file fp1.rej patch failed, unable to continue (try -v) patch failed, rejects left in working directory errors during apply, please fix and qrefresh p1 [2] $ cat fp1 cp1-bad $ cat fp1.rej --- fp1 +++ fp1 @@ -0,0 +1,1 @@ +cp1 $ hg qpop -aqf patch queue now empty $ hg forget fp1 $ rm fp1 $ rm fp1.rej qpush --exact when already at a patch $ hg update 1 0 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg qpush -e p0 applying p0 now at: p0 $ hg qpush -e p1 abort: cannot push --exact with applied patches [255] $ hg qpop -aq patch queue now empty qpush --exact --move should fail $ hg qpush -e --move p1 abort: cannot use --exact and --move together [255] qpush --exact a patch without a parent recorded $ hg qpush -q now at: p0 $ grep -v '# Parent' .hg/patches/p0 > p0.new $ mv p0.new .hg/patches/p0 $ hg qpop -aq patch queue now empty $ hg qpush -e abort: p0 does not have a parent recorded [255] $ hg qpush -e p0 abort: p0 does not have a parent recorded [255] $ hg qpush -e p1 abort: p0 does not have a parent recorded [255] $ hg qpush -ea abort: p0 does not have a parent recorded [255] $ cd ..