NetBSD/gnu/usr.bin/groff/grog/grog.pl

151 lines
2.6 KiB
Perl

#!/usr/bin/perl
# $NetBSD: grog.pl,v 1.3 1996/08/13 07:04:43 explorer Exp $
# grog -- guess options for groff command
# Inspired by doctype script in Kernighan & Pike, Unix Programming
# Environment, pp 306-8.
$prog = $0;
$prog =~ s@.*/@@;
push(@command, "groff");
while ($ARGV[0] =~ /^-./) {
$arg = shift(@ARGV);
last if $arg eq "--";
push(@command, $arg);
}
if (@ARGV) {
foreach $arg (@ARGV) {
&process($arg, 0);
}
}
else {
&process("-", 0);
}
sub process {
local($filename, $level) = @_;
local(*FILE);
if (!open(FILE, $filename eq "-" ? $filename : "< $filename")) {
print STDERR "$prog: can't open \`$filename': $!\n";
exit 1 unless $level;
return;
}
while (<FILE>) {
if (/^\.TS/) {
$_ = <FILE>;
if (!/^\./) {
$tbl++;
$soelim++ if $level;
}
}
elsif (/^\.EQ/) {
$_ = <FILE>;
if (!/^\./ || /^\.[0-9]/) {
$eqn++;
$soelim++ if $level;
}
}
elsif (/^\.PS([ 0-9.<].*)?$/) {
if (/^\.PS\s*<\s*(\S+)/) {
$pic++;
$soelim++ if $level;
&process($1, $level);
}
else {
$_ = <FILE>;
if (!/^\./ || /^\.ps/) {
$pic++;
$soelim++ if $level;
}
}
}
elsif (/^\.R1/ || /^\.\[/) {
$refer++;
$soelim++ if $level;
}
elsif (/^\.[PLI]P/) {
$PP++;
}
elsif (/^\.P$/) {
$P++;
}
elsif (/^\.(PH|SA)/) {
$mm++;
}
elsif (/^\.TH/) {
$TH++;
}
elsif (/^\.SH/) {
$SH++;
}
elsif (/^\.([pnil]p|sh)/) {
$me++;
}
elsif (/^\.Dd/) {
$mdoc++;
}
elsif (/^\.(Tp|Dp|De|Cx|Cl)/) {
$mdoc_old = 1;
}
# In the old version of -mdoc `Oo' is a toggle, in the new it's
# closed by `Oc'.
elsif (/^\.Oo/) {
$Oo++;
}
elsif (/^\.Oc/) {
$Oo--;
}
if (/^\.so/) {
chop;
s/^.so *//;
s/\\\".*//;
s/ .*$//;
&process($_, $level + 1) unless /\\/ || $_ eq "";
}
}
close(FILE);
}
if ($pic || $tbl || $eqn || $refer) {
$s = "-";
$s .= "s" if $soelim;
$s .= "R" if $refer;
$s .= "p" if $pic;
$s .= "t" if $tbl;
$s .= "e" if $eqn;
push(@command, $s);
}
if ($me > 0) {
push(@command, "-me");
}
elsif ($SH > 0 && $TH > 0) {
push(@command, "-man");
}
elsif ($PP > 0) {
push(@command, "-ms");
}
elsif ($P > 0 || $mm > 0) {
push(@command, "-mm");
}
elsif ($mdoc > 0) {
push(@command, ($mdoc_old || $Oo > 0) ? "-mdoc.old" : "-mdoc");
}
push(@command, "--") if @ARGV && $ARGV[0] =~ /^-./;
push(@command, @ARGV);
# We could implement an option to execute the command here.
foreach (@command) {
next unless /[\$\\\"\';&()|<> \t\n]/;
s/\'/\'\\\'\'/;
$_ = "'" . $_ . "'";
}
print join(' ', @command), "\n";