rpmrebuild

#!/bin/bash

EDIT=0

while (($#)) ; do
    [[ ${1:0:1} != - ]] && break
    case ${1:1} in
        e) EDIT=1 ; shift ;;
        *) echo "Unknown option $1, ignoring" ; shift ;;
    esac
done
[[ ! -f $1 ]] && exec echo "file '$1' not found"
[[ ${1:0:1} != / ]] && set -- "$PWD/$1"

rm -rf $HOME/.rpmmacros rpmbuild
mkdir -p rpmbuild/{BUILD,RPMS,SOURCES,SPECS,SRPMS}
echo "%_topdir %(echo $PWD)/rpmbuild" > $HOME/.rpmmacros

export RPM_BUILD_NCPUS=$(grep -c ^processor /proc/cpuinfo)

if ((EDIT)); then
    cd rpmbuild/SOURCES
    rpm2cpio "$1" | cpio -i
    mv *.spec ../SPECS
    cd ../SPECS
    vi *.spec
    rpmbuild -bs *.spec
    rpmbuild -bb *.spec
else
    rpmbuild --rebuild "$1"
fi