djvu2pdf

#!/nix/store/z6rd8wq02azalrlm2m5k08iy53klg624-bash-5.1-p12/bin/sh
# (c) Christoph Sieghart <sigi@0x2a.at> 2007 - 2011

VERSION=0.9.2

# Flags for commandline options
S_FLAG=0
C_FLAG=0

trap 'if [ $S_FLAG -eq 1 ]; then clean_temp_dir; clean_cursor; fi' 0 1 2

#*****************************************************************************
# - Functions
#*****************************************************************************

check_print_error() {
    if [ $? -ne 0 ]
    then
        echo "Error: $0: $1"
        exit 1
    fi
}

print_version() {
    echo "djvu2pdf $VERSION - Christoph Sieghart <sigi@0x2a.at>"
}

print_help() {
    print_version
    echo -e "\n  Usage: ./djvu2pdf filename.djvu [filename.djvu] ...\n"
    echo "  -h       Prints this help"
    echo "  -v       Prints the version number"
    echo "  -s       Show status messages (A little bit slower - every page"
    echo "           gets dumped on its own and later recombined"
    echo -e "  -c       Don't use terminal escape sequences to move cursor \n"
    exit 0
}

print_quiet() {
    if [ $S_FLAG -eq 1 ]; then
        echo -en $1
    fi
}

move_cursor() {
    if [ $S_FLAG -eq 1 ]; then
        if [ $C_FLAG -eq 1 ]; then
            echo -ne "\n"
            return
        else
            # cursor magic
            echo -en "\033[35D"
        fi
    fi
}

clean_cursor() {
    # if the cursor 'magic' messes anything up
    if [ $S_FLAG -eq 1 ]; then
        if [ $C_FLAG -eq 0 ]; then
            /nix/store/5dmd4cq2mwhd0d7kmppjk7ql00ygfkh3-ncurses-6.3/bin/tput sgr0
        fi
    fi
}

clean_temp_files() {
    /nix/store/2hfc8dk1g3bsms4l4xf620x7ynslvq3k-coreutils-9.0/bin/rm -rf "$TEMP"/* >/dev/null 2>&1
}

clean_temp_dir() {
    /nix/store/2hfc8dk1g3bsms4l4xf620x7ynslvq3k-coreutils-9.0/bin/rm -rf "$TEMP" >/dev/null 2>&1
}

#*****************************************************************************
# - Programm checks
#*****************************************************************************

# MacOS and BSD compatibility
/nix/store/mhnx1fhz1iaznn1b0snxyr2qp9y2wcsa-which-2.21/bin/which seq >/dev/null 2>&1
if [ $? -eq 0 ]; then
    SEQ=seq
else
    SEQ=jot
fi

for i in "ddjvu djvulibre" "gs ghostscript"; do
    BINARY=$(echo $i | /nix/store/vr8p2is1j4n68gwr1hj4r061pf6462ng-gawk-5.1.1/bin/awk '{print $1'})
    PACKAGE=$(echo $i | /nix/store/vr8p2is1j4n68gwr1hj4r061pf6462ng-gawk-5.1.1/bin/awk '{print $2'})
    /nix/store/mhnx1fhz1iaznn1b0snxyr2qp9y2wcsa-which-2.21/bin/which $BINARY >/dev/null 2>&1
    check_print_error "$BINARY not found. Install $PACKAGE."
done


#*****************************************************************************
# - Commandline options
#*****************************************************************************

while getopts hvcs opt
do
    case "$opt" in
        v) print_version
        exit 0;;
        h) print_help;;
        c) C_FLAG=1;;
        s) S_FLAG=1;;
        \?) exit 1;;
    esac
done

shift `/nix/store/2hfc8dk1g3bsms4l4xf620x7ynslvq3k-coreutils-9.0/bin/expr $OPTIND - 1`

if [ $C_FLAG -eq 1 ]; then
    if [ $S_FLAG -eq 0 ]; then
        echo -e "Error: $0: The option -c only makes sense with -s"
        exit 1
    fi
fi

if [ -z "$1" ]; then
    echo -e "Error: $0: No file specified for conversion"
    exit 1
fi

#*****************************************************************************
# - Main loop
#*****************************************************************************

while [ $# -gt 0 ]; do

    if [ ! -f "$1" ]; then
        echo -e "Error: $0: File '$1' not found"
        exit 1
    fi

    FILENAME=$1
    FILEBASE=`/nix/store/2hfc8dk1g3bsms4l4xf620x7ynslvq3k-coreutils-9.0/bin/basename "$FILENAME" .djvu`
    OUTPUTFILE="${FILEBASE}.pdf"

    if [ $S_FLAG -eq 0 ]; then
        /nix/store/495blbmi282jp20pijgls7iszi0jrlqp-djvulibre-3.5.28-bin/bin/ddjvu -format=pdf "${FILENAME}" "${OUTPUTFILE}" 2> /dev/null
    else

        #*****************************************************************************
        # - Temporary Files
        #*****************************************************************************

        TEMP="${TMPDIR:=/tmp}/djvu2pdf.$$"
        /nix/store/2hfc8dk1g3bsms4l4xf620x7ynslvq3k-coreutils-9.0/bin/mkdir $TEMP
        check_print_error "Creating temporary directory failed!"

        # Child processes should use our temporary directory
        TMPDIR=$TEMP

        PAGES=`/nix/store/495blbmi282jp20pijgls7iszi0jrlqp-djvulibre-3.5.28-bin/bin/djvudump "$FILENAME" | /nix/store/pkw9ckmar4dw7sgsszg8zgydfq4xc11k-gnugrep-3.7/bin/grep pages | /nix/store/vr8p2is1j4n68gwr1hj4r061pf6462ng-gawk-5.1.1/bin/awk '{print $8;}'`
        ZEROCOUNT=$(/nix/store/2hfc8dk1g3bsms4l4xf620x7ynslvq3k-coreutils-9.0/bin/expr `echo $PAGES | /nix/store/2hfc8dk1g3bsms4l4xf620x7ynslvq3k-coreutils-9.0/bin/wc -m` - 1)
        COUNT=1
        TENS=1

        print_quiet "Converting $FILENAME to $OUTPUTFILE\n"

        #
        # We dump every page and print the status message
        #

        for COUNT in `/nix/store/2hfc8dk1g3bsms4l4xf620x7ynslvq3k-coreutils-9.0/bin/seq 1 $PAGES`;
        do
            if [ `/nix/store/2hfc8dk1g3bsms4l4xf620x7ynslvq3k-coreutils-9.0/bin/expr $COUNT / $TENS` -gt 0 ]
            then
                TENS=`/nix/store/2hfc8dk1g3bsms4l4xf620x7ynslvq3k-coreutils-9.0/bin/expr $TENS \* 10`
                ZEROCOUNT=`/nix/store/2hfc8dk1g3bsms4l4xf620x7ynslvq3k-coreutils-9.0/bin/expr $ZEROCOUNT - 1`
                ZEROS=$(for i in `/nix/store/2hfc8dk1g3bsms4l4xf620x7ynslvq3k-coreutils-9.0/bin/seq 1 $ZEROCOUNT`; do echo -n 0; done)
            fi

            /nix/store/495blbmi282jp20pijgls7iszi0jrlqp-djvulibre-3.5.28-bin/bin/ddjvu -format=pdf -page $COUNT "$FILENAME" "$TEMP/$FILEBASE.${ZEROS}$COUNT.pdf" 2> /dev/null

            print_quiet "Page $COUNT/$PAGES dumped"
            move_cursor
        done

        clean_cursor

        #
        # The pages get combined into one big happy .pdf
        #

        print_quiet "\nDumping finished - writing $OUTPUTFILE\n"

        /nix/store/w0k1ip6cizl1a8lf6sxvynf504xzdjw3-ghostscript-9.55.0/bin/gs -dSAFER -dQUIET -dBATCH -sDEVICE=pdfwrite -sOutputFile="$OUTPUTFILE" -DNOPAUSE "$TEMP/$FILEBASE".*.pdf
        check_print_error "Error in creating pdf file"

        clean_temp_files
    fi

    shift
done

exit 0

### resholve directives (auto-generated) ## format_version: 2
# resholve: fix $SEQ:seq
# resholve: keep /nix/store/2hfc8dk1g3bsms4l4xf620x7ynslvq3k-coreutils-9.0/bin/basename
# resholve: keep /nix/store/2hfc8dk1g3bsms4l4xf620x7ynslvq3k-coreutils-9.0/bin/expr
# resholve: keep /nix/store/2hfc8dk1g3bsms4l4xf620x7ynslvq3k-coreutils-9.0/bin/mkdir
# resholve: keep /nix/store/2hfc8dk1g3bsms4l4xf620x7ynslvq3k-coreutils-9.0/bin/rm
# resholve: keep /nix/store/2hfc8dk1g3bsms4l4xf620x7ynslvq3k-coreutils-9.0/bin/seq
# resholve: keep /nix/store/2hfc8dk1g3bsms4l4xf620x7ynslvq3k-coreutils-9.0/bin/wc
# resholve: keep /nix/store/495blbmi282jp20pijgls7iszi0jrlqp-djvulibre-3.5.28-bin/bin/ddjvu
# resholve: keep /nix/store/495blbmi282jp20pijgls7iszi0jrlqp-djvulibre-3.5.28-bin/bin/djvudump
# resholve: keep /nix/store/5dmd4cq2mwhd0d7kmppjk7ql00ygfkh3-ncurses-6.3/bin/tput
# resholve: keep /nix/store/mhnx1fhz1iaznn1b0snxyr2qp9y2wcsa-which-2.21/bin/which
# resholve: keep /nix/store/pkw9ckmar4dw7sgsszg8zgydfq4xc11k-gnugrep-3.7/bin/grep
# resholve: keep /nix/store/vr8p2is1j4n68gwr1hj4r061pf6462ng-gawk-5.1.1/bin/awk
# resholve: keep /nix/store/w0k1ip6cizl1a8lf6sxvynf504xzdjw3-ghostscript-9.55.0/bin/gs