#!/bin/sh

MOD=$1
[ -z "$MOD" ] && {
    echo "usage: $0 <module>"
    exit 2
}

TOPD=/srv/pub/
FILELIST=fullfilelist
TIMELIST=fullfiletimelist-$MOD
LOCKFILE=.lock.$TIMELIST
CREATE=/usr/local/bin/create-filelist

(
    flock -n 9 || exit 1

    TMPD=$(mktemp -d -t create-filelist.XXXXXXXXXX)
    trap "rm -rf $TMPD" EXIT
    cd $TMPD

    $CREATE -c -s -d $TOPD/$MOD -f $FILELIST -t $TIMELIST
    if diff -q $FILELIST $TOPD/$MOD/$FILELIST > /dev/null; then
        mv $FILELIST $TOPD/$MOD/$FILELIST
        chmod 0644 $TOPD/$MOD/$FILELIST
    fi

    if diff -q $TIMELIST $TOPD/$MOD/$TIMELIST > /dev/null; then
        mv $TIMELIST $TOPD/$MOD/$TIMELIST
        chmod 0644 $TOPD/$MOD/$TIMELIST
    fi

) 9>$LOCKFILE