opencog-link-grammar / systest / sh-flags

#!/usr/bin/env perl
# Written by <amirpli@gmail.com>
#%DESC Show shell/Perl script flags
#
# Note the ":" for an option that is not to be documented.
#For example:
# In Bash scripts:
#
#   --help)
#           exec sh-flags $0
#           ;;
#   -n) # Only configure - no compilation
#           no_compilation=1
#           shift
#           ;;
#   -q) # show configuration parameters
#           qflag=1
#           shift
#           ;;
#   -old) : # Unused, for backward compatibility
#           shift
#           ;;
#
#
# In Perl scripts:
#
#while (defined $ARGV[0] && $ARGV[0] =~ /^-(.*)/) {
#       my $argv = shift;
#       my $flag = $1;

#       $flag eq '-help' and do {
#               exec('sh-flags', $0)
#       };
#       $flag eq 'l' and do { #- -l Use LEN in cost comparisons
#               $lflag = $argv;
#               next;
#       };
#       (($flag eq 'md5') || ($flag eq 'md5u')) and do { #- -md5 Emit md5
#                                                        #- -md5u Same but discard dups
#               $md5flag = $argv;
#               next;
#       };
#}

use strict;
use warnings;

(my $prog = $0) =~ s/.*\///;
die "$prog: Missing argument\n" unless defined $ARGV[0];
my $printflags;
my $infile = $ARGV[0];
open(F, $infile) or die "$prog: Cannot open '$infile': $!\n";

while (<F>) {
	if (/^#%DESC|^#%?Usage/i)
	{
		print;
		next;
	}
	# Skip all lines unless case label with a comment, or #-
	# But ignore ## comments.
	if (/^\s*([^(]+)\)\s+#[^#](.*)/ || / #-\s+(\S+)\s+(\S+.*)$/)
	{
		unless ($printflags)
		{
			print "Flags:\n";
			$printflags = 1;
		}
		print "$1: $2\n";
	}
}