#!/usr/bin/bash

bash -n "$0" || exit 1

shopt -s extglob

patchnr() {

    local nr

    while [[ -n "$1" ]]; do

        nr=$(cut -d'.' -f1 <<< "$1")

        shift

        [[ $((10#$nr)) -gt 0 ]] || echo "Invalid patch number: $nr" >&2

        echo "$nr"

    done

}

if [[ -e "$HOME/git/dracut/$1" ]]; then

    srcrpm="$HOME/git/dracut/$1"

elif [[ -e "$HOME/dev/upstream/dracut/$1" ]]; then

    srcrpm="$HOME/dev/upstream/dracut/$1"

else

    srcrpm="$1"

fi

[[ -f $srcrpm ]] || exit 3

old_release=$(rpmspec -D "_sourcedir $(pwd)" -q --srpm --qf '%{release}' dracut.spec)

old_release=${old_release%%.*}

cp dracut.spec dracut.spec.old

rm *.patch; git reset --hard HEAD

last_patch_nr=$(patchnr *.patch | sort -n | tail -n 1)

last_patch_nr=${last_patch_nr:-0000}

#for i in *.patch; do git rm -f $i;done

if rpm -ivh --define "_srcrpmdir $PWD" --define "_specdir $PWD" --define "_sourcedir $PWD" "$srcrpm"; then

	  for nr in $(patchnr *.patch); do

	    [[ $((10#$nr)) -gt $((10#$last_patch_nr)) ]] && git add "${nr}.patch"

    done

    new_version=$(rpmspec -D "_sourcedir $(pwd)" -q --srpm --qf '%{version}' dracut.spec)

    new_release=$(rpmspec -D "_sourcedir $(pwd)" -q --srpm --qf '%{release}' dracut.spec)

    new_release_full=${new_release%.*}

    new_release=${new_release%%.*}

    do_print=""

    while IFS=$'\n' read -r line

    do

        if [ -z "$do_print" ] && [ "$line" = "%changelog" ]; then

            do_print="yes"

            echo "* $(LANG='C' date '+%a %b %d %Y') $(git config user.name) <$(git config user.email)> - ${new_version}-${new_release_full}"

            for ((i=old_release; i

                subject=$(grep '^Subject: ' +(0)$i.patch | head -1)

                if [ -n "$subject" ]; then

                    echo "-${subject#*\[PATCH\]}"

                fi

            done

            echo

        elif [ -n "$do_print" ]; then

            echo "$line"

        fi

    done < dracut.spec.old >> dracut.spec

    # Patch list:

    # ls *.patch | tr -s ' ' '\n' | cut -d'.' -f1 | xargs -i zsh -c "nr=\$((10#{})); echo \"Patch\${nr}: {}.patch\""

    git add dracut.spec

    msg="Resolves: $(

    for ((i=old_release; i

        resolves=$(grep '^Resolves: ' +(0)$i.patch | head -1)

        if [ -n "$resolves" ]; then

            echo "${resolves#Resolves: }"

        fi

    done | sed -e 's/rhbz#/#/g' | sort -u | tr -s '\n' ',')"

    git commit -m "$(echo -e "dracut-${new_version}-${new_release_full}\n\n${msg%,}")"

fi