#!/bin/bash

(
    export PATH=/usr/local/bin:$PATH
    REPOSITORY=http://lemon.cs.elte.hu/hg/lemon/
    WORKINGCOPY=lemon

    ROOT=$PWD
    LASTREV_FILE=$ROOT/last-rev
    LASTREV=`cat $LASTREV_FILE`

    cd $WORKINGCOPY
    hg pull
    hg update

    REV=`hg id -n`

    if [ $# -eq 0 ]; then
        if [ $LASTREV -lt $REV ]; then
            # Delete autom4te.cache in order to get configure regenerated 
            # and the new revision number propagated into it.
            rm -rf autom4te.cache
            rm -rf doc/html
            autoreconf -vi
            ./configure
            make html
            cd ..
            rm -rf latest-doc
            cp -r $WORKINGCOPY/doc/html latest-doc
            echo $REV >$LASTREV_FILE
        fi

    elif [ $1 = '--help' ]; then
        echo 'Usage:'
        echo '   make-doc --init'
        echo '   make-doc --help'
        echo '   make-doc'
        exit 1
    elif [ $1 = '--init' ]; then
        rm -rf $WORKINGCOPY
        hg clone $REPOSITORY $WORKINGCOPY
        echo '0' >$LASTREV_FILE
        exit 0
    fi
 ) >/dev/null 2>&1