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#!/bin/sh -e

REQUIRED="pdflatex"
SYNOPSIS="converts markdown-formatted text to PDF, using pdflatex."

### common.sh

### tempdir.sh

texname=output
logfile=$THIS_TEMPDIR/log

pandoc -s -r markdown -w latex "$@" -o - >$THIS_TEMPDIR/$texname.tex \
2>$logfile

if [ "$OUTPUT" = "-" ]; then
    firstinfile="$(echo $ARGS | sed -ne '1p')"
    firstinfilebase="${firstinfile%.*}"
    destname="${firstinfilebase:-stdin}.pdf"
else
    destname="$OUTPUT"
fi

(
    origdir=$(pwd)
    cd $THIS_TEMPDIR
    TEXINPUTS=$origdir:$TEXINPUTS:
    export TEXINPUTS
    pdflatex -interaction=batchmode $texname.tex >/dev/null || {
        errcode=$?
	err "${THIS}: pdfLaTeX failed with error code $errcode"
	[ -f $texname.log ] && {
		err "${THIS}: error context:"
	    sed -ne '/^!/,/^[[:space:]]*$/p' \
		-ne '/^[Ll]a[Tt]e[Xx] [Ww]arning/,/^[[:space:]]*$/p' \
		-ne '/^[Ee]rror/,/^[[:space:]]*$/p' $texname.log >&2
	    if grep -q "File \`ucs.sty' not found" $texname.log; then
		err "${THIS}: Please install the 'unicode' package from CTAN:"
		err "  http://www.ctan.org/tex-archive/macros/latex/contrib/unicode/"
	    fi
	    if grep -q "File \`fancyvrb.sty' not found" $texname.log; then
		err "${THIS}: Please install the 'fancyvrb' package from CTAN:"
		err "  http://www.ctan.org/tex-archive/macros/latex/contrib/fancyvrb/"
	    fi
	}
        exit $errcode
    }
) || exit $?

is_target_exists=
if [ -f "$destname" ]; then
    is_target_exists=1
    mv "$destname" "$destname~" 
fi

mv -f $THIS_TEMPDIR/$texname.pdf "$destname"

errn "Created $destname"
[ -z "$is_target_exists" ] || {
    errn " (previous file has been backed up as $destname~)"
}
err .