contrib/builddeb

dirstate: use a presized dict for the dirstate

This uses a simple heuristic to avoid expensive resizes.

On a real-world repo with around 400,000 files, perfdirstate:

before: ! wall 0.155562 comb 0.160000 user 0.150000 sys 0.010000 (best of 64)
after:  ! wall 0.132638 comb 0.130000 user 0.120000 sys 0.010000 (best of 75)

On another real-world repo with around 250,000 files:

before: ! wall 0.098459 comb 0.100000 user 0.090000 sys 0.010000 (best of 100)
after:  ! wall 0.089084 comb 0.090000 user 0.080000 sys 0.010000 (best of 100)

#!/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
DEBBUILDDIR="$PWD/debbuild"
while [ "$1" ]; do
    case "$1" in
    --prepare )
        shift
        BUILD=
        ;;
    --debbuilddir )
        shift
        DEBBUILDDIR="$1"
        shift
        ;;
    * )
        echo "Invalid parameter $1!" 1>&2
        exit 1
        ;;
    esac
done

set -u

rm -rf $DEBBUILDDIR
mkdir -p $DEBBUILDDIR

if [ ! -d .hg ]; then
    echo 'You are not inside a Mercurial repository!' 1>&2
    exit 1
fi

gethgversion

cp -r $PWD/contrib/debian $DEBBUILDDIR/DEBIAN
chmod -R 0755 $DEBBUILDDIR/DEBIAN

control=$DEBBUILDDIR/DEBIAN/control

# 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__/$version/" < $control > $control.tmp
mv $control.tmp $control

if [ "$BUILD" ]; then
    dpkg-deb --build $DEBBUILDDIR
    mv $DEBBUILDDIR.deb $DEBBUILDDIR/mercurial-$version-$release.deb
    if [ $? = 0 ]; then
        echo
        echo "Built packages for $version-$release:"
        find $DEBBUILDDIR/ -type f -newer $control
    fi
else
    echo "Prepared sources for $version-$release $control are in $DEBBUILDDIR - use like:"
    echo "dpkg-deb --build $DEBBUILDDIR"
fi