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#!/bin/sh
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#
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# Build a Mercurial RPM in place.
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#
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# Bryan O'Sullivan <bos@serpentine.com>
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root="`hg root 2>/dev/null`"
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specfile=contrib/mercurial.spec
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if [ -z "$root" ]; then
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echo 'You are not inside a Mercurial repository!' 1>&2
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exit 1
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fi
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rpmdir=/tmp/"`basename $root | sed 's/ /_/'`"-rpm
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cd "$root"
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rm -rf $rpmdir
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mkdir -p $rpmdir/RPMS
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hg clone "$root" $rpmdir/BUILD
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if [ ! -f $specfile ]; then
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echo "Cannot find $specfile!" 1>&2
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exit 1
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fi
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tmpspec=/tmp/`basename "$specfile"`.$$
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# Use the most recent tag as the version.
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version=`hg tags | perl -e 'while(<STDIN>){if(/^(\d\S+)/){print$1;exit}}'`
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# Compute the release number as the difference in revision numbers
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# between the tip and the most recent tag.
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release=`hg tags | perl -e 'while(<STDIN>){/^(\S+)\s+(\d+)/;if($1eq"tip"){$t=$2}else{print$t-$2+1;exit}}'`
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tip=`hg -q tip`
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# Beat up the spec file
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sed -e 's,^Source:.*,Source: /dev/null,' \
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-e "s,^Version:.*,Version: $version," \
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-e "s,^Release:.*,Release: $release," \
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-e "s,^%prep.*,Changeset: $tip\n\0," \
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-e 's,^%setup.*,,' \
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$specfile > $tmpspec
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rpmbuild --define "_topdir $rpmdir" -bb $tmpspec
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if [ $? = 0 ]; then
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rm -rf $tmpspec $rpmdir/BUILD
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mv $rpmdir/RPMS/*/* $rpmdir && rm -r $rpmdir/RPMS
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echo
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echo "Packages are in $rpmdir"
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fi
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