create-html-usage.pl

   1 #!/usr/bin/env perl
   2
   3 # create-html-usage.pl -- insert usage lines into README
   4 # Cpoyright (C) 2015 Kyle J. McKay.  All rights reserved.
   5 # License GPLv2 or, at your option, any later version.
   6
   7 use strict;
   8 use warnings;
   9
  10 use File::Basename;
  11
  12 my $mydir = dirname($0);
  13 my $last = undef;
  14
  15 sub get_tg_usage($)
  16 {
  17         my $name = shift;
  18         if ( -x "$mydir/tg-$name" ) {
  19                 my $usage = `"$mydir/tg-$name" -h 2>&1`;
  20                 chomp $usage;
  21                 $usage =~ s/^(Usage|\s+Or):\s*//mig;
  22                 return split "\n", $usage;
  23         } elsif ($name eq "help") {
  24                 return "tg help [-w] [<command>]";
  25         }
  26         return undef;
  27 }
  28
  29 sub wrap
  30 {
  31         my ($w, $i, $s) = @_;
  32         my $h = ' ' x $i;
  33         my $ans = '';
  34         while (length($s) > $w && $s =~ /^(.{1,$w})(?<=\w)\b[ \t]+(.+)$/s) {
  35                 $ans .= $1."\n";
  36                 $s = "$h$2";
  37         }
  38         $ans .= $s if $s !~ /^\s*$/;
  39         return $ans;
  40 }
  41
  42 my $textmode;
  43 $textmode=1, shift if defined($ARGV[0]) && $ARGV[0] eq '--text';
  44 my $tab = ' ' x 8;
  45 while (my $line = <>) {
  46         chomp $line;
  47         1 while $line =~ s/\t+/" " x (($+[0] - $-[0]) * 8 - $-[0] % 8)/e;
  48         $line =~ s'^``(.*)``$'wrap(78, 4, $1)'e if $textmode;
  49         $line =~ s'^(\s*):`(.+?)`_:'"$1$2 "'e if $textmode;
  50         if (defined($last)) {
  51                 printf "%s\n",  $last;
  52                 if ($line =~ /^[~]+$/ && $last =~ /^tg ([^\s]+)$/) {
  53                         my @usage = get_tg_usage($1);
  54                         if (@usage) {
  55                                 printf "%s\n", $line;
  56                                 if ($textmode) {
  57                                         printf "%s", join("",map({wrap(78, 12, "$tab$_")."\n"} @usage));
  58                                 } else {
  59                                         printf "%s", join("",map({"$tab| ".'``'.$_.'``'."\n"} @usage));
  60                                 }
  61                                 $line = "";
  62                         }
  63                 }
  64         }
  65         $last = $line;
  66 }
  67
  68 printf "%s\n", $last if defined($last);
  69 exit 0;