#!/bin/sh -e

REQUIRED="pdflatex"

### common.sh

### tempdir.sh

texname=output
logfile=$THIS_TEMPDIR/log

if ! pandoc -s -d -r markdown -w latex "$@" >$THIS_TEMPDIR/$texname.tex \
2>$logfile; then
    [ -f $logfile ] && sed -e 's/^pandoc/markdown2pdf/g' \
        -e '/^INPUT=/d' -e '/^OUTPUT=/d' \
        -e '/^[[:space:]]*\(-f\|-t\|-s\|-R\|-S\|-m\|-i\|-c\|-T\|-D\|-d\)/,/./d'\
        -e 's/(implies -s)//g' $logfile >&2
    exit 1
fi

outfile="$(sed -ne 's/^OUTPUT=//p' $logfile)"
IFS="$NEWLINE"
set -- $(sed -ne 's/^INPUT=//p' $logfile)
firstinfilebase="${1%.*}"
defaultdest="${firstinfilebase:-stdin}.pdf"
destname="${outfile:-$defaultdest}"

(
    cd $THIS_TEMPDIR
    if ! pdflatex -interaction=batchmode $texname.tex >$texname.log 2>&1; then
	shortlog="$(sed -ne 's/^[Ee]rror:*[[:space:]]*//p' $texname.log)"
	if [ -n "$shortlog" ]; then
		err "Errors:"
		err "$shortlog"
	else
		# Short log is not available, dump the whole log.
		err "pdfLaTeX log:"
		cat $texname.log >&2
	fi
        if grep -q "File \`ucs.sty' not found" $texname.log; then
            err "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 "Please install the 'fancyvrb' package from CTAN:"
            err "http://www.ctan.org/tex-archive/macros/latex/contrib/fancyvrb/"
        fi
        exit 1
    fi
) || 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 .