Mercurial > hg
view tests/test-import-merge.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 | bdc0e04df243 |
children | eb586ed5d8ce |
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$ echo "[extensions]" >> $HGRCPATH $ echo "mq=" >> $HGRCPATH $ tipparents() { > hg parents --template "{rev}:{node|short} {desc|firstline}\n" -r tip > } Test import and merge diffs $ hg init repo $ cd repo $ echo a > a $ hg ci -Am adda adding a $ echo a >> a $ hg ci -m changea $ echo c > c $ hg ci -Am addc adding c $ hg up 0 1 files updated, 0 files merged, 1 files removed, 0 files unresolved $ echo b > b $ hg ci -Am addb adding b created new head $ hg up 1 1 files updated, 0 files merged, 1 files removed, 0 files unresolved $ hg merge 3 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg ci -m merge $ hg export . > ../merge.diff $ grep -v '^merge$' ../merge.diff > ../merge.nomsg.diff $ cd .. $ hg clone -r2 repo repo2 adding changesets adding manifests adding file changes added 3 changesets with 3 changes to 2 files updating to branch default 2 files updated, 0 files merged, 0 files removed, 0 files unresolved $ cd repo2 $ hg pull -r3 ../repo pulling from ../repo searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) (run 'hg heads' to see heads, 'hg merge' to merge) Test without --exact and diff.p1 == workingdir.p1 $ hg up 1 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ cat > $TESTTMP/editor.sh <<EOF > env | grep HGEDITFORM > echo merge > \$1 > EOF $ HGEDITOR="sh $TESTTMP/editor.sh" hg import --edit ../merge.nomsg.diff applying ../merge.nomsg.diff HGEDITFORM=import.normal.merge $ tipparents 1:540395c44225 changea 3:102a90ea7b4a addb $ hg strip --no-backup tip 0 files updated, 0 files merged, 1 files removed, 0 files unresolved Test without --exact and diff.p1 != workingdir.p1 $ hg up 2 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg import ../merge.diff applying ../merge.diff warning: import the patch as a normal revision (use --exact to import the patch as a merge) $ tipparents 2:890ecaa90481 addc $ hg strip --no-backup tip 0 files updated, 0 files merged, 1 files removed, 0 files unresolved Test with --exact $ hg import --exact ../merge.diff applying ../merge.diff 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ tipparents 1:540395c44225 changea 3:102a90ea7b4a addb $ hg strip --no-backup tip 0 files updated, 0 files merged, 1 files removed, 0 files unresolved Test with --bypass and diff.p1 == workingdir.p1 $ hg up 1 0 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg import --bypass ../merge.diff applying ../merge.diff $ tipparents 1:540395c44225 changea 3:102a90ea7b4a addb $ hg strip --no-backup tip Test with --bypass and diff.p1 != workingdir.p1 $ hg up 2 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg import --bypass ../merge.diff applying ../merge.diff warning: import the patch as a normal revision (use --exact to import the patch as a merge) $ tipparents 2:890ecaa90481 addc $ hg strip --no-backup tip Test with --bypass and --exact $ hg import --bypass --exact ../merge.diff applying ../merge.diff $ tipparents 1:540395c44225 changea 3:102a90ea7b4a addb $ hg strip --no-backup tip $ cd .. Test that --exact on a bad header doesn't corrupt the repo (issue3616) $ hg init repo3 $ cd repo3 $ echo a>a $ hg ci -Aqm0 $ echo a>>a $ hg ci -m1 $ echo a>>a $ hg ci -m2 $ echo a>a $ echo b>>a $ echo a>>a $ hg ci -m3 $ hg export 2 | head -7 > ../a.patch $ hg export tip > out >>> apatch = open("../a.patch", "ab") >>> apatch.write("".join(open("out").readlines()[7:])) $ cd .. $ hg clone -qr0 repo3 repo3-clone $ cd repo3-clone $ hg pull -qr1 ../repo3 $ hg import --exact ../a.patch applying ../a.patch 1 files updated, 0 files merged, 0 files removed, 0 files unresolved patching file a Hunk #1 succeeded at 1 with fuzz 1 (offset -1 lines). transaction abort! rollback completed abort: patch is damaged or loses information [255] $ hg verify checking changesets checking manifests crosschecking files in changesets and manifests checking files 1 files, 2 changesets, 2 total revisions