#!/bin/bash -u

#

# Finds all possible srpms for a given repo

#

# Might want to drop this in ~/bin/ and chmod u+x it

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

usage() {

    echo ''                                               >&2

    echo "$0 [-hrcq] [-b branch]"                         >&2

    echo ''                                               >&2

    echo 'You need to run this from inside a sources git repo' >&2

    echo ''                                               >&2

    echo ' -h: This help message'                         >&2

    echo ' -r: Use the Redhat tag rather than centos tag' >&2

    echo ' -c: Return in sha:srpm format'                 >&2

    echo ' -q: Suppress warnings'                         >&2

    echo ''                                               >&2

    echo ' -b: specify a branch to examine'               >&2

    echo "     defaults to repo's current branch"         >&2

    echo ''                                               >&2

    echo "  $0 -b c7"                                     >&2

    echo "  $0 -r -b c7"                                  >&2

    echo "  $0 -c -b remotes/origin/c7"                   >&2

    exit 1

}

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

warn () {

    [[ ${QUIET} -eq 1 ]] && return

    echo 1>&2 "$@"

}

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

filter () {

    # filter used for log messages

    if [[ ${RHELTAG} -eq 1 ]]

    then

        grep -v centos | grep import

    else

        grep import

    fi

}

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

if [[ $? -ne 0 ]]; then

    usage

fi

if [[ ! -d .git ]] || [[ ! -d SPECS ]]; then

    echo 'You need to run this from inside a sources git repo'

    exit 1

fi

RHELTAG=0

QUIET=0

WITHCOMMITHASH=0

BRANCH=""

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

# setup args in the right order for making getopt evaluation

# nice and easy.  You'll need to read the manpages for more info

# utilizing 'while' construct rather than 'for arg' to avoid unnecessary

# shifting of program args

args=$(getopt -o hrcqb: -- "$@")

eval set -- "$args"

while [[ 0 -eq 0 ]]; do

    case $1 in

        -- )

            # end of getopt args, shift off the -- and get out of the loop

            shift

            break

           ;;

         -r )

            # skip any package with 'centos' in the dist area

            RHELTAG=1

            shift

           ;;

         -c )

            # return with the commit hash as a prefix of the resulting srpm

            WITHCOMMITHASH=1

            shift

           ;;

         -q )

            # suppress warnings

            QUIET=1

            shift

           ;;

         -b )

            # Check this particular branch 

            BRANCH=$2

            shift

            shift

           ;;

         -h )

            # get help

            usage

           ;;

    esac

done

# commit message contains white space, set IFS to \n

IFS='

'

if [[ "x${BRANCH}" != 'x' ]]; then

    loglist=$(git log ${BRANCH} --pretty="%H|%s" | filter)

    if [[ $? -ne 0 ]]; then

        exit 1

    fi

else

    loglist=$(git log --pretty="%H|%s" | filter)

    if [[ $? -ne 0 ]]; then

        exit 1

    fi

fi

# flag for if nothing is found

FOUND=False

for entry in $loglist; do

    FOUND=True

    pkg=$(echo ${entry} | cut -d' ' -f2)

    # strip .src.rpm if present

    nvr="${pkg%.src.rpm}"

    if [[ ${WITHCOMMITHASH} -eq 1 ]]; then

        shasum=$(echo ${entry} | cut -d'|' -f1)

        echo "${shasum}:${nvr}.src.rpm"

    else

        echo "${nvr}.src.rpm"

    fi

done

if [ "${FOUND}" != "True" ]

then

    warn "No SRPMs found"

fi