#!/bin/bash
#
# This program is free software; you may redistribute it and/or modify it under
# the same terms as Perl itself. For a copy of the license, please reference
# 'perldoc perlartistic' or 'perldoc perlgpl'.


force="--force"

while getopts ":n" opt; do
    case ${opt} in
        n )
            force=""
            ;;
        \? )
            echo "$0: illegal option -- $OPTARG" 1>&2
            exit 1
            ;;
    esac
done

buildroot="$LJHOME/build/static"
mkdir -p $buildroot

jcompress=`mktemp /tmp/jcompress.XXXXXX` || exit 1

compressor="$LJHOME/ext/yuicompressor/yuicompressor.jar"
uncompressed_dir="/max"
if [ ! -e $compressor ]
then
    echo "Warning: No compressor found ($compressor)" >&2
    compressor=""
    uncompressed_dir=""
fi

# if compass is installed, build that first
compass=$(which compass)
if [ "$compass" != "" ]; then
    # see if we have Compass version 1.0 or later
    compass_version_ok=$(compass version | perl -ne '/^Compass (\d\.\d+)/ && print $1 >= 1.0')
    if [ $compass_version_ok ]; then
        echo "* Building SCSS..."
        cd $LJHOME
        if ! $compass compile -e production $force; then
            echo "Error: Compass compilation failed" >&2
            exit 1
        fi
        if [ -d "$LJHOME/ext/dw-nonfree" ]; then
            cd $LJHOME/ext/dw-nonfree
            if ! $compass compile -e production $force; then
                echo "Error: Compass compilation failed (dw-nonfree)" >&2
                exit 1
            fi
        fi
    else
        echo "Error: Compass version must be 1.0 or higher. Please upgrade." >&2
        exit 1
    fi
else
    echo "Error: No compass command found" >&2
    exit 1
fi

# check the relevant paths using the same logic as the codebase
perl -e '
use strict;

BEGIN { require "$ENV{LJHOME}/cgi-bin/ljlib.pl"; }
use LJ::Directories;

# look up all instances of the directory in various subfolders
# then add trailing slashes so that rsync will treat these as directories
printf( ":img:%s/\n", join( "/ ",LJ::get_all_directories( "htdocs/img", home_first => 1 ) ) );
printf( "compress:stc:%s/\n", join( "/ ",LJ::get_all_directories( "htdocs/stc", home_first => 1 ) ) );
printf( "compress:js:%s/\n",  join( "/ ",LJ::get_all_directories( "htdocs/js",  home_first => 1 ) ) );' | while read -r line
do
    compress=`echo $line | cut -d ":" -f 1`

    to_dir=`echo $line | cut -d ":" -f 2`
    final="$buildroot/$to_dir"                           # directory we serve files from, if minifying

    if [[ -n "$compressor" && -n "$compress" ]]; then
        sync_to="$buildroot$uncompressed_dir/$to_dir"    # directory we're copying files to
    else
        sync_to=$final
    fi

    if [[ ! -e $sync_to ]]; then mkdir -p "$sync_to"; fi
    if [[ ! -e $final ]];   then mkdir -p "$final"; fi

    from=`echo $line | cut -d ":" -f 3`

    echo "* Syncing to $sync_to..."
    rsync --archive --out-format="%n" --delete $from $sync_to | while read -r modified_file
    do
        echo " > $modified_file"
        if [[ -n "$compressor" && -n "$compress" ]]
        then
            base=$(basename "$modified_file")
            ext=${base##*.}
            dir=$(dirname "$modified_file")
            synced_file="$sync_to/$modified_file"
            if [[ -f "$synced_file" ]]; then

                # remove the old one so that we don't have a stale version
                # in case minifying fails for any reason
                if [[ -f "$final/$modified_file" ]]; then
                    rm "$final/$modified_file"
                fi

                mkdir -p "$final/$dir"
                cp -p "$synced_file" "$final/$modified_file"

                if [[ "$ext" = "js" || "$ext" = "css" ]]; then
                    # Attempt to rewrite the file with compressed version
                    echo "java -jar $compressor \"$synced_file\" -o \"$final/$modified_file\"" >> $jcompress
                fi
            else
                # we're deleting rather than copying
                # only need this for compressed files
                # rsync handles the uncompressed ones
                deleting=${modified_file#deleting }
                if [[ "$deleting" != "$modified_file" ]]; then
                    rm "$final/$deleting"
                fi
            fi
        fi
    done

    # Now parallel execute
    if [[ -s $jcompress ]]; then
        echo "Executing compression (takes a minute)..."
        cat $jcompress | xargs -d "\n" -n 1 -P 4 -- bash -c
        >$jcompress
    fi
done

if [[ -n $compressor ]]; then
    escaped=$( echo $buildroot | sed 's/\//\\\//g' )
    find $buildroot/js $buildroot/max/js   | sed "s/$escaped\/\(max\/\)\?//" | sort | uniq -c | sort -n   | grep '^[[:space:]]\+1'
    find $buildroot/stc $buildroot/max/stc | sed "s/$escaped\/\(max\/\)\?//" | sort | uniq -c | sort -n   | grep '^[[:space:]]\+1'
fi

rm -f $jcompress

exit 0