Mercurial > hg
view mercurial/default.d/mergetools.rc @ 26375:3686fa2b8eee
windows: insert file positioning call between reads and writes
fopen() and fdopen() have a unique-to-Windows requirement that
transitions between read and write operations in files opened
in modes r+, w+, and a+ perform a file positioning call
(fsetpos, fseek, or rewind) in between. While the MSDN docs don't
say what will happen if this is not done, observations reveal
that Python raises an IOError with errno 0. Furthermore, I
/think/ this behavior isn't deterministic. But I can reproduce
it reliably with subsequent patches applied that open revlogs
in a+ mode and perform both reads and writes.
This patch introduces a proxy class for file handles opened
in r+, w+, and a+ mode on Windows. The class intercepts calls
and audits whether a file positioning function has been called
between read and write operations. If not, a dummy, no-op seek
to the current file position is performed. This appears to be
sufficient to "trick" Windows into allowing transitions between
read and writes without raising errors.
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Sun, 27 Sep 2015 18:46:53 -0700 |
parents | 14d647d25c70 |
children | f6e2e42fb8ef |
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# Some default global settings for common merge tools [merge-tools] kdiff3.args=--auto --L1 base --L2 local --L3 other $base $local $other -o $output kdiff3.regkey=Software\KDiff3 kdiff3.regkeyalt=Software\Wow6432Node\KDiff3 kdiff3.regappend=\kdiff3.exe kdiff3.fixeol=True kdiff3.gui=True kdiff3.diffargs=--L1 $plabel1 --L2 $clabel $parent $child gvimdiff.args=--nofork -d -g -O $local $other $base gvimdiff.regkey=Software\Vim\GVim gvimdiff.regkeyalt=Software\Wow6432Node\Vim\GVim gvimdiff.regname=path gvimdiff.priority=-9 gvimdiff.diffargs=--nofork -d -g -O $parent $child vimdiff.args=$local $other $base -c 'redraw | echomsg "hg merge conflict, type \":cq\" to abort vimdiff"' vimdiff.check=changed vimdiff.priority=-10 merge.check=conflicts merge.priority=-100 gpyfm.gui=True meld.gui=True meld.args=--label='local' $local --label='merged' $base --label='other' $other -o $output meld.check=changed meld.diffargs=-a --label=$plabel1 $parent --label=$clabel $child tkdiff.args=$local $other -a $base -o $output tkdiff.gui=True tkdiff.priority=-8 tkdiff.diffargs=-L $plabel1 $parent -L $clabel $child xxdiff.args=--show-merged-pane --exit-with-merge-status --title1 local --title2 base --title3 other --merged-filename $output --merge $local $base $other xxdiff.gui=True xxdiff.priority=-8 xxdiff.diffargs=--title1 $plabel1 $parent --title2 $clabel $child diffmerge.regkey=Software\SourceGear\SourceGear DiffMerge\ diffmerge.regkeyalt=Software\Wow6432Node\SourceGear\SourceGear DiffMerge\ diffmerge.regname=Location diffmerge.priority=-7 diffmerge.args=-nosplash -merge -title1=local -title2=merged -title3=other $local $base $other -result=$output diffmerge.check=changed diffmerge.gui=True diffmerge.diffargs=--nosplash --title1=$plabel1 --title2=$clabel $parent $child p4merge.args=$base $local $other $output p4merge.regkey=Software\Perforce\Environment p4merge.regkeyalt=Software\Wow6432Node\Perforce\Environment p4merge.regname=P4INSTROOT p4merge.regappend=\p4merge.exe p4merge.gui=True p4merge.priority=-8 p4merge.diffargs=$parent $child p4mergeosx.executable = /Applications/p4merge.app/Contents/MacOS/p4merge p4mergeosx.args = $base $local $other $output p4mergeosx.gui = True p4mergeosx.priority=-8 p4mergeosx.diffargs=$parent $child tortoisemerge.args=/base:$base /mine:$local /theirs:$other /merged:$output tortoisemerge.regkey=Software\TortoiseSVN tortoisemerge.regkeyalt=Software\Wow6432Node\TortoiseSVN tortoisemerge.check=changed tortoisemerge.gui=True tortoisemerge.priority=-8 tortoisemerge.diffargs=/base:$parent /mine:$child /basename:$plabel1 /minename:$clabel ecmerge.args=$base $local $other --mode=merge3 --title0=base --title1=local --title2=other --to=$output ecmerge.regkey=Software\Elli\xc3\xa9 Computing\Merge ecmerge.regkeyalt=Software\Wow6432Node\Elli\xc3\xa9 Computing\Merge ecmerge.gui=True ecmerge.diffargs=$parent $child --mode=diff2 --title1=$plabel1 --title2=$clabel # editmerge is a small script shipped in contrib. # It needs this config otherwise it behaves the same as internal:local editmerge.args=$output editmerge.check=changed editmerge.premerge=keep filemerge.executable=/Developer/Applications/Utilities/FileMerge.app/Contents/MacOS/FileMerge filemerge.args=-left $other -right $local -ancestor $base -merge $output filemerge.gui=True ; Windows version of Beyond Compare beyondcompare3.args=$local $other $base $output /ro /lefttitle=local /centertitle=base /righttitle=other /automerge /reviewconflicts /solo beyondcompare3.regkey=Software\Scooter Software\Beyond Compare 3 beyondcompare3.regname=ExePath beyondcompare3.gui=True beyondcompare3.priority=-2 beyondcompare3.diffargs=/lro /lefttitle=$plabel1 /righttitle=$clabel /solo /expandall $parent $child ; Linux version of Beyond Compare bcompare.args=$local $other $base -mergeoutput=$output -ro -lefttitle=parent1 -centertitle=base -righttitle=parent2 -outputtitle=merged -automerge -reviewconflicts -solo bcompare.gui=True bcompare.priority=-1 bcompare.diffargs=-lro -lefttitle=$plabel1 -righttitle=$clabel -solo -expandall $parent $child ; OS X version of Beyond Compare bcomposx.executable = /Applications/Beyond Compare.app/Contents/MacOS/bcomp bcomposx.args=$local $other $base -mergeoutput=$output -ro -lefttitle=parent1 -centertitle=base -righttitle=parent2 -outputtitle=merged -automerge -reviewconflicts -solo bcomposx.gui=True bcomposx.priority=-1 bcomposx.diffargs=-lro -lefttitle=$plabel1 -righttitle=$clabel -solo -expandall $parent $child winmerge.args=/e /x /wl /ub /dl other /dr local $other $local $output winmerge.regkey=Software\Thingamahoochie\WinMerge winmerge.regkeyalt=Software\Wow6432Node\Thingamahoochie\WinMerge\ winmerge.regname=Executable winmerge.check=changed winmerge.gui=True winmerge.priority=-10 winmerge.diffargs=/r /e /x /ub /wl /dl $plabel1 /dr $clabel $parent $child araxis.regkey=SOFTWARE\Classes\TypeLib\{46799e0a-7bd1-4330-911c-9660bb964ea2}\7.0\HELPDIR araxis.regappend=\ConsoleCompare.exe araxis.priority=-2 araxis.args=/3 /a2 /wait /merge /title1:"Other" /title2:"Base" /title3:"Local :"$local $other $base $local $output araxis.checkconflict=True araxis.binary=True araxis.gui=True araxis.diffargs=/2 /wait /title1:$plabel1 /title2:$clabel $parent $child diffuse.priority=-3 diffuse.args=$local $base $other diffuse.gui=True diffuse.diffargs=$parent $child UltraCompare.regkey=Software\Microsoft\Windows\CurrentVersion\App Paths\UC.exe UltraCompare.regkeyalt=Software\Wow6432Node\Microsoft\Windows\CurrentVersion\App Paths\UC.exe UltraCompare.args = $base $local $other -title1 base -title3 other UltraCompare.priority = -2 UltraCompare.gui = True UltraCompare.binary = True UltraCompare.check = conflicts,changed UltraCompare.diffargs=$child $parent -title1 $clabel -title2 $plabel1