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|
#!/bin/sh
################################################################################
#
# groffdown - (legacy shellscript version)
#
# Usage: groffdown [--debug] [-o PREFIX] FILE
#
################################################################################
set -eu
umask 0022
export LC_ALL=C
# usage [CODE]
# CODE: default to 1. Error code.
usage(){
set -- "${1:-1}"
_redirect=2
case "$1" in 0) _redirect=1; esac
printf '%s\n' "Usage: ${0##*/} [--debug] [-o PREFIX] FILE" 1>&$_redirect
exit $1
}
# error_exit MSG
error_exit(){
printf '%s\n' "${0##*/}: $1" 1>&2
exit 1
}
# == Flags and global arguments ==
DEBUG=
OUTPUT_FILE=
# == Parse argument ==
case $# in 0) usage 1; esac
while :; do
case $# in 0) break; esac
case $1 in -|[!-]*) break; esac
case $1 in --) shift; break; esac
case $1 in --help|--usage|'-?')
usage 0
esac
case $1 in --d|--de|--deb|--debu|--debug)
DEBUG=1
shift
continue
esac
case $1 in -o)
OUTPUT_FILE="$2"
shift 2
continue
esac
case $1 in -?*)
error_exit "$1: Unknown option"
esac
done
case $# in 0) usage 1; esac
# == Variables ==
file="$OUTPUT_FILE"; : ${file:="$( readlink -f "$1" )"}
dir=$(dirname "$file")
base="${file%.*}"
# == Readable regular file? ==
if test -f "$1" && test -r "$1"; then
: # NOP
else
error_exit "${1##*/}: Not a readable regular file"
fi
# == Hyphened file to be real argument ==
case "$1" in -*) set -- "./$1";; esac
# == Main section ==
# -- Translate markdown to groff ms. --
cat "$1" |
#
# Yaml-specifics.
awk '
BEGIN {
is_in_yaml = 0;
}
# -- Beginning of yaml. --
NR == 1 && /^-+$/ {
is_in_yaml = 1;
next;
}
# -- End of yaml. --
is_in_yaml && /^-+$/ {
is_in_yaml = 0;
# YYY(Tpaefawzen): Seems like line for end of yaml should be preserved?
}
is_in_yaml {
# -- Yaml metadata. --
sub("title: *", ".TL\n");
sub("author: *", ".AU\n");
sub("date: *", ".ND\n");
sub("institution: *", ".AI\n");
}
1' |
#
# Others are context-free.
sed '
# -- LaTeX-style abstract. --
s/\\begin{abstract}/\.AB/
s/\\end{abstract}/\.AE/
# -- Sections. --
s/^\#####.\(.*\)/\.NH 5\n\1\n\.PP/g
s/^\####.\(.*\)/\.NH 4\n\1\n\.PP/g
s/^\###.\(.*\)/\.NH 3\n\1\n\.PP/g
s/^\##.\(.*\)/\.NH 2\n\1\n\.PP/g
s/^\#.\(.*\)/\.NH 1\n\1\n\.PP/g
# -- Bold and italic. --
s/\*\*\*\(.*\)\*\*\*$/\n\.BI\ \"\1\"\ /g
s/\*\*\*\(.*\)\*\*\*\(.\)$/\n\.BI\ \"\1\"\ \"\2\"/g
s/\*\*\*\(.*\)\*\*\*\(.\)/\n\.BI\ \"\1\"\ \"\2\"\n/g
# -- Bold. --
s/\*\*\(.*\)\*\*$/\n\.B\ \"\1\"\ /g
s/\*\*\(.*\)\*\*\(.\)$/\n\.B\ \"\1\"\ \"\2\"/g
s/\*\*\(.*\)\*\*\(.\)/\n\.B\ \"\1\"\ \"\2\"\n/g
# -- Italic. --
s/\*\(.*\)\*$/\n\.I\ \"\1\"\ /g
s/\*\(.*\)\*\(.\)$/\n\.I\ \"\1\"\ \"\2\"/g
s/\*\(.*\)\*\(.\)/\n\.I\ \"\1\"\ \"\2\"\n/g
# -- Inline code. --
s/`\(.*\)`$/\n\.CW\ \"\1\"\ /g
s/`\(.*\)`\(.\)$/\n\.CW\ \"\1\"\ \"\2\"/g
s/`\(.*\)`\(.\)/\n\.CW\ \"\1\"\ \"\2\"\n/g
# -- List items. --
s/^\ ...............-\ /.IP\ \\(bu\ 10\n/g
s/^\ ...........-\ /.IP\ \\(bu\ 8\n/g
s/^\ .......-\ /.IP\ \\(bu\ 6\n/g
s/^\ ...-\ /.IP\ \\(bu\ 4\n/g
s/^-\ /.IP\ \\(bu\ 2\n/g
s/^\ .*-\ /.IP\ \\(bu\ 12\n/g
# -- Begin a new paragraph. --
s/^$/.PP/g
' |
#
# Parsing for ms things ends.
cat > "$base.ms.tmp"
tmpfname="$base.ms.tmp"
# To PDF when required.
case "$DEBUG" in "")
if cat "$base.ms.tmp" | groff -ms -Tpdf > "$base.pdf.tmp"; then
rm "$base.ms.tmp"
else
error_exit "could not convert to PDF with groff (code: $?)"
fi
tmpfname="$base.pdf.tmp"
;;
esac
mv "$tmpfname" "${tmpfname%.tmp}"
# == Finally ==
exit $?
# vim: set shiftwidth=4 softtabstop=4:
|
