#!/bin/sh -e

#

# Build a Mercurial RPM from the current repo

#

# Tested on

# - Fedora 20

# - CentOS 5

# - centOS 6

cd "`dirname $0`/.."

specfile=contrib/mercurial.spec

if [ ! -f $specfile ]; then

    echo "Cannot find $specfile!" 1>&2

    exit 1

fi

if [ ! -d .hg ]; then

    echo 'You are not inside a Mercurial repository!' 1>&2

    exit 1

fi

if $HG id -i | grep '+$' > /dev/null 2>&1; then

    echo -n "Your local changes will NOT be in the RPM. Continue [y/n] ? "

    read answer

    if echo $answer | grep -iv '^y'; then

        exit

    fi

fi

rpmdir="$PWD/rpmbuild"

rm -rf $rpmdir

mkdir -p $rpmdir/SOURCES $rpmdir/SPECS $rpmdir/RPMS $rpmdir/SRPMS $rpmdir/BUILD

hgversion=`$HG version | sed -ne 's/.*(version \(.*\))$/\1/p'`

if echo $hgversion | grep -- '-' > /dev/null 2>&1; then

    # nightly build case, version is like 1.3.1+250-20b91f91f9ca

    version=`echo $hgversion | cut -d- -f1`

    release=`echo $hgversion | cut -d- -f2 | sed -e 's/+.*//'`

else

    # official tag, version is like 1.3.1

    version=`echo $hgversion | sed -e 's/+.*//'`

    release='0'

fi

$HG archive -t tgz $rpmdir/SOURCES/mercurial-$version.tar.gz

rpmspec=$rpmdir/SPECS/mercurial-$version.spec

sed -e "s,^Version:.*,Version: $version," \

    -e "s,^Release:.*,Release: $release," \

    $specfile > $rpmspec

echo >> $rpmspec

echo "%changelog" >> $rpmspec

if echo $version | grep '+' > /dev/null 2>&1; then

    latesttag="`echo $version | sed -e 's/+.*//'`"

    $HG log -r .:"$latesttag" -fM \

        --template '{date|hgdate}\t{author}\t{desc|firstline}\n' | python -c '

import sys, time

def datestr(date, format):

    return time.strftime(format, time.gmtime(float(date[0]) - date[1]))

changelog = []

for l in sys.stdin.readlines():

    tok = l.split("\t")

    hgdate = tuple(int(v) for v in tok[0].split())

    changelog.append((datestr(hgdate, "%F"), tok[1], hgdate, tok[2]))

prevtitle = ""

for l in sorted(changelog, reverse=True):

    title = "* %s %s" % (datestr(l[2], "%a %b %d %Y"), l[1])

    if prevtitle != title:

        prevtitle = title

        print

        print title

    print "- %s" % l[3].strip()

' >> $rpmspec

else

    $HG log \

         --template '{date|hgdate}\t{author}\t{desc|firstline}\n' \

         .hgtags | python -c '

import sys, time

def datestr(date, format):

    return time.strftime(format, time.gmtime(float(date[0]) - date[1]))

for l in sys.stdin.readlines():

    tok = l.split("\t")

    hgdate = tuple(int(v) for v in tok[0].split())

    print "* %s %s\n- %s" % (datestr(hgdate, "%a %b %d %Y"), tok[1], tok[2])

' >> $rpmspec

fi

rpmbuild --define "_topdir $rpmdir" -ba $rpmspec --clean

if [ $? = 0 ]; then

    echo

    echo "Packages are in $rpmdir:"

    ls -l $rpmdir/*RPMS/*

fi