Mercurial > hg
view tests/test-convert-cvs-detectmerge.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 | 96529f81e2e9 |
children | e5e5ee2b60e4 |
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#require cvs Test config convert.cvsps.mergefrom config setting. (Should test similar mergeto feature, but I don't understand it yet.) Requires builtin cvsps. $ CVSROOT=`pwd`/cvsrepo $ export CVSROOT $ cvscall() > { > cvs -f "$@" > } output of 'cvs ci' varies unpredictably, so just discard it XXX copied from test-convert-cvs-synthetic $ cvsci() > { > sleep 1 > cvs -f ci "$@" > /dev/null > } XXX copied from test-convert-cvs-synthetic $ cat <<EOF >> $HGRCPATH > [extensions] > convert = > [convert] > cvsps.cache = 0 > cvsps.mergefrom = \[MERGE from (\S+)\] > EOF create cvs repository with one project $ cvscall -q -d "$CVSROOT" init $ mkdir cvsrepo/proj populate cvs repository $ cvscall -Q co proj $ cd proj $ touch file1 $ cvscall -Q add file1 $ cvsci -m"add file1 on trunk" cvs commit: Examining . create two release branches $ cvscall -q tag -b v1_0 T file1 $ cvscall -q tag -b v1_1 T file1 modify file1 on branch v1_0 $ cvscall -Q update -rv1_0 $ sleep 1 $ echo "change" >> file1 $ cvsci -m"add text" cvs commit: Examining . make unrelated change on v1_1 $ cvscall -Q update -rv1_1 $ touch unrelated $ cvscall -Q add unrelated $ cvsci -m"unrelated change" cvs commit: Examining . merge file1 to v1_1 $ cvscall -Q update -jv1_0 RCS file: $TESTTMP/cvsrepo/proj/file1,v retrieving revision 1.1 retrieving revision 1.1.2.1 Merging differences between 1.1 and 1.1.2.1 into file1 $ cvsci -m"add text [MERGE from v1_0]" cvs commit: Examining . merge change to trunk $ cvscall -Q update -A $ cvscall -Q update -jv1_1 RCS file: $TESTTMP/cvsrepo/proj/file1,v retrieving revision 1.1 retrieving revision 1.1.4.1 Merging differences between 1.1 and 1.1.4.1 into file1 $ cvsci -m"add text [MERGE from v1_1]" cvs commit: Examining . non-merged change on trunk $ echo "foo" > file2 $ cvscall -Q add file2 $ cvsci -m"add file2 on trunk" file2 this will create rev 1.3 change on trunk to backport $ echo "backport me" >> file1 $ cvsci -m"add other text" file1 $ cvscall log file1 RCS file: $TESTTMP/cvsrepo/proj/file1,v Working file: file1 head: 1.3 branch: locks: strict access list: symbolic names: v1_1: 1.1.0.4 v1_0: 1.1.0.2 keyword substitution: kv total revisions: 5; selected revisions: 5 description: ---------------------------- revision 1.3 date: * (glob) add other text ---------------------------- revision 1.2 date: * (glob) add text [MERGE from v1_1] ---------------------------- revision 1.1 date: * (glob) branches: 1.1.2; 1.1.4; add file1 on trunk ---------------------------- revision 1.1.4.1 date: * (glob) add text [MERGE from v1_0] ---------------------------- revision 1.1.2.1 date: * (glob) add text ============================================================================= XXX how many ways are there to spell "trunk" with CVS? backport trunk change to v1_1 $ cvscall -Q update -rv1_1 $ cvscall -Q update -j1.2 -j1.3 file1 RCS file: $TESTTMP/cvsrepo/proj/file1,v retrieving revision 1.2 retrieving revision 1.3 Merging differences between 1.2 and 1.3 into file1 $ cvsci -m"add other text [MERGE from HEAD]" file1 fix bug on v1_1, merge to trunk with error $ cvscall -Q update -rv1_1 $ echo "merge forward" >> file1 $ cvscall -Q tag unmerged $ cvsci -m"fix file1" cvs commit: Examining . $ cvscall -Q update -A $ cvscall -Q update -junmerged -jv1_1 RCS file: $TESTTMP/cvsrepo/proj/file1,v retrieving revision 1.1.4.2 retrieving revision 1.1.4.3 Merging differences between 1.1.4.2 and 1.1.4.3 into file1 note the typo in the commit log message $ cvsci -m"fix file1 [MERGE from v1-1]" cvs commit: Examining . $ cvs -Q tag -d unmerged convert to hg $ cd .. $ hg convert proj proj.hg initializing destination proj.hg repository connecting to $TESTTMP/cvsrepo scanning source... collecting CVS rlog 12 log entries creating changesets warning: CVS commit message references non-existent branch 'v1-1': fix file1 [MERGE from v1-1] 10 changeset entries sorting... converting... 9 add file1 on trunk 8 unrelated change 7 add text 6 add text [MERGE from v1_0] 5 add text [MERGE from v1_1] 4 add file2 on trunk 3 add other text 2 add other text [MERGE from HEAD] 1 fix file1 0 fix file1 [MERGE from v1-1] complete log $ template="{rev}: '{branches}' {desc}\n" $ hg -R proj.hg log --template="$template" 9: '' fix file1 [MERGE from v1-1] 8: 'v1_1' fix file1 7: 'v1_1' add other text [MERGE from HEAD] 6: '' add other text 5: '' add file2 on trunk 4: '' add text [MERGE from v1_1] 3: 'v1_1' add text [MERGE from v1_0] 2: 'v1_0' add text 1: 'v1_1' unrelated change 0: '' add file1 on trunk graphical log $ hg -R proj.hg log -G --template="$template" o 9: '' fix file1 [MERGE from v1-1] | | o 8: 'v1_1' fix file1 | | | o 7: 'v1_1' add other text [MERGE from HEAD] |/| o | 6: '' add other text | | o | 5: '' add file2 on trunk | | o | 4: '' add text [MERGE from v1_1] |\| | o 3: 'v1_1' add text [MERGE from v1_0] | |\ +---o 2: 'v1_0' add text | | | o 1: 'v1_1' unrelated change |/ o 0: '' add file1 on trunk