img2pdf.sh

#!/usr/bin/env bash

NAME="img2pdf"

USAGE="$NAME - uses LaTeX to place images full-page
and convert to PDF. Useful for printing.
 
$NAME [options] filename [filename]
 
options:
-h, --help                show this help
-m, --margin              size of margins. Default none.
-p, --paper-size          paper size. See 'geometry' pacakge for
                          possible sizes. Default letterpaper.
-o, --output              output file. Default [first filename].pdf
 
"
# Set defaults:
PAPER=letterpaper
MARGIN=0.0cm

## Start parsing ##
ARGS=$(getopt -o "hp:m:o:" -l "help,paper-size:,margin:,output:" -n "$NAME" -- "$@")

if [ $? -ne 0 ]; then
    # if error in parsing args
    echo "$USAGE"
    exit 1
fi

eval set -- "$ARGS"

while true; do
        case "$1" in
                -h|--help)
                    echo "$USAGE"
                    exit 0
                    ;;
                -l|--paper-size)
                    PAPER=$2
                    shift 2
                    ;;
                -m|--margin)
                    MARGIN=$2
                    shift 2
                    ;;
                -o|--output)
                    OUTFILE=$2
                    shift 2
                    ;;
                --)
                    shift
                    break
                    ;;
                *)
                    echo "$USAGE"
                    exit 1
                    ;;
        esac
done

# $1, $@, etc. are left as positional args
## Finished parsing ##

if [[ -z $1 ]]; then
    # if no positional argument given
    echo "No file specified. See '$NAME -h' for help."
    exit 1
fi

if [[ -z $OUTFILE ]]; then
    OUTFILE=${1##*/}
    OUTFILE=${OUTFILE%.*}
    OUTFILE=${OUTFILE}.pdf
fi


ORIGDIR=$(pwd)
TEMPDIR=$(mktemp -d --tmpdir ${NAME}XXXX)
TEMPFILE=$(tempfile -d $TEMPDIR)
LOGFILE=$(tempfile -d $TEMPDIR -s .lp.log)

cat >> $TEMPFILE.tex <<EOF
\documentclass{article}
\pagestyle{empty}
\usepackage[${PAPER},margin=${MARGIN}]{geometry}
\usepackage{graphicx}

\begin{document}
EOF

for FILE in "$@"; do
    if [[ ! -f "$FILE" ]]
    # if $FILE is not a file
    then
        echo "File $FILE does not exist"
        exit 1
    fi

    cp "$FILE" "$TEMPDIR"
    echo '\centering' >> $TEMPFILE.tex
    echo "\includegraphics[width=\textwidth,height=\textheight,keepaspectratio]{$FILE}" >> $TEMPFILE.tex
done

echo '\end{document}' >> $TEMPFILE.tex

cd $TEMPDIR
pdflatex -halt-on-error $TEMPFILE.tex > $LOGFILE

if [[ $? -ne 0 ]]
then
    tail $LOGFILE
    echo " "
    echo "LaTeX errors encountered."
    echo "Full log written to $LOGFILE"
    cd $ORIGDIR
    exit 1
fi

cd $ORIGDIR

cp $TEMPFILE.pdf $OUTFILE

rm -rf $TEMPDIR