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|
#!/usr/bin/perl
# grog -- guess options for groff command
# Inspired by doctype script in Kernighan & Pike, Unix Programming
# Environment, pp 306-8.
$prog = $0;
$prog =~ s@.*/@@;
$sp = "[\\s\\n]";
push(@command, "groff");
while ($ARGV[0] =~ /^-./) {
$arg = shift(@ARGV);
$sp = "" if $arg eq "-C";
&usage(0) if $arg eq "-v" || $arg eq "--version";
&help() if $arg eq "--help";
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 $level;
return;
}
while (<FILE>) {
if (/^\.TS$sp/) {
$_ = <FILE>;
if (!/^\./) {
$tbl++;
$soelim++ if $level;
}
}
elsif (/^\.EQ$sp/) {
$_ = <FILE>;
if (!/^\./ || /^\.[0-9]/) {
$eqn++;
$soelim++ if $level;
}
}
elsif (/^\.GS$sp/) {
$_ = <FILE>;
if (!/^\./) {
$grn++;
$soelim++ if $level;
}
}
elsif (/^\.G1$sp/) {
$_ = <FILE>;
if (!/^\./) {
$grap++;
$pic++;
$soelim++ if $level;
}
}
elsif (/^\.PS$sp([ 0-9.<].*)?$/) {
if (/^\.PS\s*<\s*(\S+)/) {
$pic++;
$soelim++ if $level;
&process($1, $level);
}
else {
$_ = <FILE>;
if (!/^\./ || /^\.ps/) {
$pic++;
$soelim++ if $level;
}
}
}
elsif (/^\.R1$sp/ || /^\.\[$sp/) {
$refer++;
$soelim++ if $level;
}
elsif (/^\.[PLI]P$sp/) {
$PP++;
}
elsif (/^\.P$/) {
$P++;
}
elsif (/^\.(PH|SA)$sp/) {
$mm++;
}
elsif (/^\.TH$sp/) {
$TH++;
}
elsif (/^\.SH$sp/) {
$SH++;
}
elsif (/^\.([pnil]p|sh)$sp/) {
$me++;
}
elsif (/^\.Dd$sp/) {
$mdoc++;
}
elsif (/^\.(Tp|Dp|De|Cx|Cl)$sp/) {
$mdoc_old = 1;
}
# In the old version of -mdoc `Oo' is a toggle, in the new it's
# closed by `Oc'.
elsif (/^\.Oo$sp/) {
$Oo++;
s/^\.Oo/\. /;
redo;
}
# The test for `Oo' and `Oc' not starting a line (as allowed by the
# new implementation of -mdoc) is not complete; it assumes that
# macro arguments are well behaved, i.e., "" is used within "..." to
# indicate a doublequote as a string element, and weird features
# like `.foo a"b' are not used.
elsif (/^\..* Oo( |$)/) {
s/\\\".*//;
s/\"[^\"]*\"//g;
s/\".*//;
if (s/ Oo( |$)/ /) {
$Oo++;
}
redo;
}
elsif (/^\.Oc$sp/) {
$Oo--;
s/^\.Oc/\. /;
redo;
}
elsif (/^\..* Oc( |$)/) {
s/\\\".*//;
s/\"[^\"]*\"//g;
s/\".*//;
if (s/ Oc( |$)/ /) {
$Oo--;
}
redo;
}
if (/^\.so$sp/) {
chop;
s/^.so *//;
s/\\\".*//;
s/ .*$//;
&process($_, $level + 1) unless /\\/ || $_ eq "";
}
}
close(FILE);
}
sub usage {
local($exit_status) = $_;
print "GNU grog (groff) version @VERSION@\n";
exit $exit_status;
}
sub help {
print "usage: grog [ option ...] [files...]\n";
exit 0;
}
if ($pic || $tbl || $eqn || $grn || $grap || $refer) {
$s = "-";
$s .= "s" if $soelim;
$s .= "R" if $refer;
# grap must be run before pic
$s .= "G" if $grap;
$s .= "p" if $pic;
$s .= "g" if $grn;
$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";
|
