Mercurial > hg
view contrib/builddeb @ 27430:e240e914d226 stable
revlog: seek to end of file before writing (issue4943)
Revlogs were recently refactored to open file handles in "a+" and use a
persistent file handle for reading and writing. This drastically
reduced the number of file handles being opened.
Unfortunately, it appears that some versions of Solaris lose the file
offset when performing a write after the handle has been seeked.
The simplest workaround is to seek to EOF on files opened in a+ mode
before writing to them, which is what this patch does.
Ideally, this code would exist in the vfs layer. However, this would
require creating a proxy class for file objects in order to provide a
custom implementation of write(). This would add overhead. Since
revlogs are the only files we open in a+ mode, the one-off workaround
in revlog.py should be sufficient.
This patch appears to have little to no impact on performance on my
Linux machine.
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Thu, 17 Dec 2015 17:16:02 -0800 |
parents | 6474b64045fb |
children | 7fbab10f812f |
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#!/bin/sh -e # # Build a Mercurial debian package from the current repo # # Tested on Jessie (stable as of original script authoring.) . $(dirname $0)/packagelib.sh BUILD=1 CLEANUP=1 DEBVERSION=jessie while [ "$1" ]; do case "$1" in --release ) shift DEBVERSION="$1" shift ;; --cleanup ) shift BUILD= ;; --build ) shift CLEANUP= ;; --debbuilddir ) shift DEBBUILDDIR="$1" shift ;; * ) echo "Invalid parameter $1!" 1>&2 exit 1 ;; esac done trap "if [ '$CLEANUP' ] ; then rm -r '$PWD/debian' ; fi" EXIT set -u if [ ! -d .hg ]; then echo 'You are not inside a Mercurial repository!' 1>&2 exit 1 fi gethgversion debver="$version" if [ -n "$type" ] ; then debver="$debver~$type" fi if [ -n "$distance" ] ; then debver="$debver+$distance-$node" fi control=debian/control changelog=debian/changelog if [ "$BUILD" ]; then if [ -d debian ] ; then echo "Error! debian control directory already exists!" exit 1 fi cp -r $PWD/contrib/debian debian chmod -R 0755 debian # This looks like sed -i, but sed -i behaves just differently enough # between BSD and GNU sed that I gave up and did the dumb thing. sed "s/__VERSION__/$debver/" < $changelog > $changelog.tmp date=$(date --rfc-2822) sed "s/__DATE__/$date/" < $changelog.tmp > $changelog rm $changelog.tmp debuild -us -uc -b if [ $? != 0 ]; then echo 'debuild failed!' exit 1 fi fi if [ "$CLEANUP" ] ; then echo OUTPUTDIR=${OUTPUTDIR:=packages/debian-$DEBVERSION} find ../mercurial*.deb ../mercurial_*.build ../mercurial_*.changes \ -type f -newer $control -print0 | \ xargs -Inarf -0 mv narf "$OUTPUTDIR" echo "Built packages for $debver:" find "$OUTPUTDIR" -type f -newer $control -name '*.deb' fi