build-aux/cross-options.pl

   1 #! /usr/bin/env perl
   2
   3 use warnings;
   4 use 5.005;
   5 use strict;
   6
   7 my %option;
   8 my %directive;
   9 my $scanner = `grep -i '"%[a-z]' $ARGV[0]`;
  10 $scanner =~ s/"\[-_\]"/-/g;
  11 while (<STDIN>)
  12 {
  13     if (/^\s*             # Initial spaces.
  14         (?:(-\w),\s+)?    # $1: $short: Possible short option.
  15         (--[-\w]+)        # $2: $long:  Long option.
  16         (\[?)             # $3: $opt:   '[' iff the argument is optional.
  17         (?:=(\S+))?       # $4: $arg:   Possible argument name.
  18         \s                # Spaces.
  19         /x)
  20     {
  21         my ($short, $long, $opt, $arg) = ($1, $2, $3, $4);
  22         $short = '' if ! defined $short;
  23         $short = '-d' if $long eq '--defines' && ! $short;
  24         my $dir = '%' . substr($long, 2);
  25         $dir = '' if index ($scanner, "\"$dir\"") < 0;
  26         if ($arg)
  27         {
  28             # if $opt, $arg contains the closing ].
  29             substr ($arg, -1) = ''
  30                 if $opt eq '[';
  31             $arg =~ s/^=//;
  32             $arg = lc ($arg);
  33             my $dir_arg = $arg;
  34             # If the argument is compite (e.g., for --define[=NAME[=VALUE]]),
  35             # put each word in @var, to build @var{name}[=@var{value}], not
  36             # @var{name[=value]}].
  37             $arg =~ s/(\w+)/\@var{$1}/g;
  38             $arg = '[' . $arg . ']'
  39                 if $opt eq '[';
  40             # For arguments of directives: this only works if all arguments
  41             # are strings and have the same syntax as on the command line.
  42             if ($dir_arg eq 'name[=value]')
  43             {
  44                 $dir_arg = '@var{name} ["@var{value}"]';
  45             }
  46             else
  47             {
  48                 $dir_arg =~ s/(\w+)/\@var{"$1"}/g;
  49                 $dir_arg = '[' . $dir_arg . ']'
  50                     if $opt eq '[';
  51             }
  52             $long = "$long=$arg";
  53             $short = "$short $arg" if $short && $short ne '-d';
  54             $dir = "$dir $dir_arg" if $dir;
  55         }
  56         $option{$long} = $short;
  57         $directive{$long} = $dir;
  58     }
  59 }
  60
  61 my $sep = '';
  62 foreach my $long (sort keys %option)
  63 {
  64     # Avoid trailing spaces.
  65     print $sep;
  66     $sep = "\n";
  67     print '@item @option{', $long, "}\n\@tab";
  68     print ' @option{', $option{$long}, '}' if $option{$long};
  69     print "\n\@tab";
  70     print ' @code{', $directive{$long}, '}' if $directive{$long};
  71     print "\n";
  72 }