makerpms

#!/bin/bash
#
# Copyright (c) 2016, Cray Inc.
# All rights reserved.
#
# This script can be used to create RPMs from the source directory, using
# the existing OS and architecture (rather than a customized chroot build
# environment).
#
# NOTE: Do NOT add this to the specfile, nor to the automake, there is no
# point. This is part of the GIT clone image, and should only be used from
# within the local clone -- it has no purpose anywhere else (e.g. in /sbin,
# or within the released RPMs.)

## Usage information
#  $@ = error information to be displayed
function usage
{
    if [[ $# -gt 0 ]]; then
        echo "$@"
        echo
    fi
    cat <<EOF
Usage: makerpms [-d build_dir] sources
       makerpms [-d build_dir] rpms [options]
       makerpms [-d build_dir] install

  sources = creates only the source tarball needed by rpmbuild to create RPMs
  rpms    = creates RPMs using the specified rpmbuild options (default = -ba)
  install = creates RPMs and installs them on this machine

  -d build_dir = set the build directory (default == ~/craybuild)
EOF
    exit 1
}

## Make selected commands visible in stdout before executing
#  $@ = command to execute (using eval)
function logdo
{
    echo "+ $@"
    eval "$@"
}

## If logdo on a command fails, stop running
#  $@ = command to execute (using eval)
function faildo
{
    if ! logdo $@; then
        echo "FAILED"
        exit 1
    fi
}

## Prepare the environment for building
#  $1 = build directory
#  NOTE: This overrides any %_topdir declaration in ~/.rpmmacros
function setup
{
    faildo mkdir -p $1/{BUILD,RPMS,SOURCES,SPECS,SRPMS}
    if grep -q '%_topdir' ~/.rpmmacros 2>/dev/null; then
        sed -i -e "s:%_topdir.*:%_topdir $1" ~/.rpmmacros
    else
        echo "%_topdir $1" >>~/.rpmmacros
    fi
}

## Create the wource tarball needed by rpmbuild
#  $1 = build directory
function mksources
{
    setup $1
    faildo rm -rf $1/SOURCES/cray-powerapi-1.0.tar.bz2
    faildo tar --exclude=.git --transform='s/^\./cray-powerapi-1.0/' -jcvf $1/SOURCES/cray-powerapi-1.0.tar.bz2 .
}

## Create new RPMs from the current sources
#  $1 = build directory
#  $2 = options to use with rpmbuild (default == '-ba' if omitted)
function mkrpms
{
    mksources $1
    opts="${2:--ba}"
    faildo rm -rf $1/BUILD/cray-powerapi-1.0
    faildo rm -rf $1/RPMS/cray*powerapi*
    faildo rpmbuild $opts cray-powerapi.spec
}

## Create new RPMs and install them
#  $1 = build directory
function mkinstall
{
    mkrpms $1 '-ba'
    # Find the complete list of RPMs created
    rpms=$(find $1/RPMS -name '*.rpm')
    # Find out what is currently installed
    pkgs=$(rpm -qa | grep 'cray.*powerapi' | sed 's/-1.0-.*$/-1.0/')
    # Remove the old RPMs (may fail if nothing installed)
    if [[ -n "$pkgs" ]]; then
        logdo rpm -e $pkgs
    fi
    # Install the new
    faildo rpm -ivh $rpms
    # Make sure dynamic library cache is updated
    ldconfig
}

################################

# Parse command line options
build=~/craybuild
while getopts "d:h" opt; do
    case "$opt" in
    d) build=$OPTARG ;;
    h) usage ;;
    *) usage "Unknown option -$opt" ;;
    esac
done
shift $(($OPTIND - 1))
if [[ $# -lt 1 ]]; then
    usage "Must specify sources, rpms, or install"
fi
action="$1"
shift 1
options="$@"

# Act on the specified command
echo "+ makerpms $action"
case "$action" in
sources)
    mksources $build
    ;;
rpms)
    mkrpms $build "$options"
    ;;
install)
    mkinstall $build
    ;;
*)
    usage "Action '$action' unknown"
    ;;
esac