#!/bin/bash

[ -f ~/.d-i_manual_daily ] || exit 1
. ~/.d-i_manual_daily

if [ "$DI_BUILDING_FROM_MAIN" ]; then
    mainlog=$logdir/main.log
else
    mainlog=/dev/stdout
fi

ALIOTH_DEVREF_PATH=/srv/alioth.debian.org/chroot/home/groups/d-i/htdocs/doc/internals

usage() {
    if [ "$@" ]; then
        echo "Error: $@"
        echo
    fi
    echo "Usage: $(basename $0)"
    exit 1
}

## Function to check result of executed programs and exit on error
checkfatal() {
    if [ ! "$1" = "0" ]; then
        echo "Unexpected error $1 while $2" >>$mainlog
        touch $ROOT/do_not_build
        echo "!!!! Autobuilding has been disabled !!!!" >>$mainlog
        rm -f $ROOT/lockfile
        exit 999
    fi
}

is_updated() {
    if egrep "^[UA].[[:space:]]" $logdir/svn_up_devref.log | \
       grep -qv "^At revision"; then
        return 0
    fi
    return 1
}

update_from_svn() {
    echo >>$mainlog
    echo "Performing SVN update..." >>$mainlog
    svn --non-interactive up >>$logdir/svn_up_devref.log 2>&1
    RESULT=$?
    if [ ! $RESULT = 0 ]; then
        echo "SVN update failed with code $RESULT" >>$mainlog
        echo >>$mainlog
        cat $logdir/svn_up_devref.log >>$mainlog
        rm -f $ROOT/lockfile
        exit 1
    fi
    if svn st 2>/dev/null | grep -q "^C"; then
        checkfatal "C" "checking for conflicts after 'svn up'"
    fi
}

# We want the developer reference files group writable
umask 0002

RETRY=""
while true; do
    case $1 in
        "")
            break ;;
        -*)
            usage "unrecognized option '$1'" ;;
        *)
            usage "invalid parameter '$1'" ;;
    esac
    shift
done

[ -f $ROOT/lockfile ] && exit 1 || touch $ROOT/lockfile

[ -e "$devref" ] && cd $devref || exit 1

## Create directories
[ -e "$logdir" ] || mkdir -p "$logdir"

if [ "$DI_BUILDING_FROM_MAIN" ]; then
    echo >>$mainlog
    echo >>$mainlog
fi
if [ "$DI_BUILDING_FROM_MAIN" ] && [ "$DI_BUILD_DEVREF" != 1 ]; then
    echo "Not building D-I Internals (as per configuration settings)" >>$mainlog
    echo >>$mainlog
    rm -f $ROOT/lockfile
    exit 0
else
    : >$logdir/svn_up_devref.log
    echo "Starting D-I Internals build -- $(date -u)" >>$mainlog
fi

update_from_svn

NR_BUILDS=0

# Build the developers reference
if is_updated; then
    make >>$mainlog 2>&1
    checkfatal "$?" "building D-I Internals"

    if [ "$DI_LOCAL_BUILD" = 1 ]; then
        echo "Local build! No changes have been uploaded." >>$mainlog
    else
        ## Copy the created files to alioth.debian.org
        echo "rsyncing files to alioth..." >>$mainlog
        rsync -qzr --perms *.html *.css alioth.debian.org:$ALIOTH_DEVREF_PATH/ >>$mainlog 2>&1
        checkfatal "$?" "rsyncing D-I Internals"
    fi
else
    echo "No changes." >>$mainlog
fi

echo >>$mainlog
echo "Done -- $(date -u)" >>$mainlog
rm -f $ROOT/lockfile

exit 0