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buildrelease script - should automate the building of new releases

#! /bin/sh
# buildrelease -- make a release

set -e
PACKAGE=nc6

# determine the version number
current_version=`grep AC_INIT ./configure.ac | sed -e 's/^AC_INIT(.*, \(.*\)-cvs, .*)$/\1/'`
if [ "X$current_version" = "X" ]; then
    echo "Can't determine current version number.  Please check configure.ac"
    exit 1
fi

current_major=`echo $current_version | sed -e 's/^\(.*\)\..*$/\1/'`
if [ "X$current_major" = "X" ]; then
    echo "Can't determine current major version number.  Please check configure.ac"
    exit 1
fi

current_minor=`echo $current_version | sed -e 's/^.*\.\(.*\)$/\1/'`
if [ "X$current_minor" = "X" ]; then
    echo "Can't determine current minor version number.  Please check configure.ac"
    exit 1
fi

new_version=$current_major.`expr $current_minor + 1`

echo -n "What is the next version number [$new_version]? "
read response

case "$response" in
 '')
   ;;
 *)
   new_version=$response
   ;;
esac


release_tag=release_`echo $new_version | sed -e 's/^\([0-9]+\)\.\([0-9+]\)$/\1_\2/'`
if [ "X$release_tag" = "Xrelease_" ]; then
    echo "Invalid new version number '$new_version'"
    exit 1
fi


# update the po files
echo
echo "Updating po files"
if [ -e po/Makefile ]; then
    (cd po && make update-po) > /dev/null
else
    echo "Please configure the source first" >&2
    exit 1
fi


# edit the changelog
echo
echo -n "Should I open the changelog for editing [Y/n]? "
read response

case "$response" in
 y|yes|Y|YES|Yes|'')
   if [ "X$EDITOR" = "X" ]; then
       EDITOR=vi
   fi
   $EDITOR ./ChangeLog
   ;;
 n|no|N|NO|No)
   ;;
 *)
   echo "Bad response" >&2;
   exit 1
   ;;
esac


# update version in configure.ac
echo
echo "Updating configure.ac with release version"
cp configure.ac configure.ac.$$
cat configure.ac.$$ | sed -e "s/^\(AC_INIT(.*, \).*-cvs\(, .*)\)$/\1$new_version\2/" > configure.ac

cvs commit

echo
echo "Tagging dist with release version"
cvs tag $release_tag

echo
echo "Updating configure.ac with new cvs version"
cat configure.ac.$$ | sed -e "s/^\(AC_INIT(.*, \).*\(-cvs, .*)\)$/\1$new_version\2/" > configure.ac
rm -f configure.ac.$$

cvs commit


# do the build
echo
echo "Building release"
set -x

cvs export -r $release_tag -d release_build $PACKAGE
cd release_build

./bootstrap
./configure
make dist
make distcheck
cp *.tar.gz *.tar.bz2 ..
cd ..
rm -rf release_build