rootdir=$(pwd -P)
pkglist="$rootdir/acceptable-package-list.txt"

distclean () {
    echo "Removing traces of previous builds from $rootdir"
    local allpkgs=$(find $rootdir -maxdepth 3 -name APKBUILD -print | sed -e 's/\/APKBUILD//g' | sort)
    for p in $allpkgs ; do
        cd $p
        pwd
        abuild clean            2>&1
        abuild cleanoldpkg      2>&1
        abuild cleanpkg         2>&1
        abuild cleancache       2>&1
    done
}

pkgcheck () {
    local installed
    installed=$(apk info)
    for q in $installed ; do
        if [ -z "$(grep $q $pkglist)" ] ; then
            echo "Removing unwanted installed package $q"
            sudo apk del $q
        fi
    done
}

build () {
    local pkgs
    local maintainer
    local pkgno
    local failed
    pkgs=$($rootdir/aport.lua deplist $rootdir $1)
    pktcnt=$(echo $pkgs | wc -w)
    pkgno=0
    failed=0
    for p in $pkgs ; do
        if [ ! -d "$rootdir/$1/$p" ] ; then
            continue
        fi
        
        pkgcheck
        pkgno=$(expr "$pkgno" + 1)
        echo "Building $p ($pkgno of $pktcnt in $1 - $failed failed)"
        cd $rootdir/$1/$p
        if [ -n "$debug" ] ; then
            apk info | sort > $rootdir/packages.$1.$pkgno.$p.before
        fi
        abuild -rm > $rootdir/$1_$p.txt 2>&1
        if [ "$?" = "0" ] ; then
    	    if [ -z "$debug" ] ; then
                rm $rootdir/$1_$p.txt
            fi
        else
            echo "Package $1/$p failed to build (output in $rootdir/$1_$p.txt)"
            if [ -n "$mail" ] ; then
                maintainer=$(grep Maintainer APKBUILD | cut -d " " -f 3- | sed 's/.*< *//;s/ *>.*//;' )
                if [ -n "$maintainer" ] ; then
                    recipients="$maintainer -cc alpine-devel@lists.alpinelinux.org"
                else
                    recipients="alpine-devel@lists.alpinelinux.org"
                fi
    	        if [ -n "$mail" ] ; then
    	            echo "sending mail to [$recipients]"
                    if [ $(wc -l $rootdir/$1_$p.txt | cut -f 1 -d ' ') -gt 400 ]; then
    		            TMPFILE="$(mktemp $1_$p.XXXXXX).txt" || exit 1
                        head -n 200 $rootdir/$1_$p.txt >> $TMPFILE
                        echo "-------" >> $TMPFILE
                        echo "snip..." >> $TMPFILE
                        echo "-------" >> $TMPFILE
                        tail -n 200 $rootdir/$1_$p.txt >> $TMPFILE
                        BUILDLOG="$TMPFILE"
                    else
                        BUILDLOG="$rootdir/$1_$p.txt"
                    fi

                    echo "Package $1/$p failed to build. Build output is attached" | \
                        email -s "NOT SPAM $p build report" -a $BUILDLOG \
                              -n AlpineBuildBot -f buildbot@alpinelinux.org $recipients
                    if [ "$BUILDLOG" = "$TMPFILE" ]; then
                        rm $BUILDLOG
                    fi
                fi
            fi
            failed=$(expr "$failed" + 1)
        fi
        if [ -n "$debug" ] ; then
            apk info | sort > $rootdir/packages.$1.$pkgno.$p.after
        fi
    done
    
    if [ "$failed" = "0" ] ; then
        echo "All $pktcnt packages in $1 built successfully" >> aport-build-log.txt
    fi
    
    cd $rootdir
}

touch START_OF_BUILD.txt

unset clean
unset mail
while getopts "cmd" opt; do
	case $opt in
		'c') clean="--clean";;
		'm') mail="--mail";;
		'd') debug="--debug";;
	esac
done

if [ -n "$clean" ] ; then
    echo "Invoked with 'clean' option. This will take a while ..."
    tmp=$(distclean)
    echo "Done"
fi

echo "Refresh aports tree"
git pull

sudo apk -U upgrade

for s in main testing unstable ; do
    echo "Building packages in $s"
    pkgcheck
    build $s
done

touch END_OF_BUILD.txt

echo "Done"