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- #!/usr/bin/perl -w
-
- # Generate a short man page from --help and --version output.
- # Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software
- # Foundation, Inc.
-
- # This program is free software; you can redistribute it and/or modify
- # it under the terms of the GNU General Public License as published by
- # the Free Software Foundation; either version 2, or (at your option)
- # any later version.
-
- # This program is distributed in the hope that it will be useful,
- # but WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- # GNU General Public License for more details.
-
- # You should have received a copy of the GNU General Public License
- # along with this program; if not, write to the Free Software Foundation,
- # Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
- # Written by Brendan O'Dea <bod@debian.org>
- # Available from ftp://ftp.gnu.org/gnu/help2man/
-
- use 5.005;
- use strict;
- use Getopt::Long;
- use Text::Tabs qw(expand);
- use POSIX qw(strftime setlocale LC_ALL);
- use locale;
-
- my $this_program = 'help2man';
- my $this_version = '1.33';
-
- my $have_gettext;
- BEGIN {
- eval {
- require Locale::gettext;
- Locale::gettext->import;
- $have_gettext = 1;
- };
-
- unless ($have_gettext)
- {
- *gettext = sub { $_[0] };
- *textdomain = sub {};
- }
- }
-
- sub _ { gettext @_ }
- sub N_ { $_[0] }
-
- textdomain $this_program;
- {
- my ($user_locale) = grep defined && length,
- (map $ENV{$_}, qw(LANGUAGE LC_ALL LC_MESSAGES LANG)), 'C';
-
- sub kark # die with message formatted in the invoking user's locale
- {
- setlocale LC_ALL, $user_locale;
- my $fmt = gettext shift;
- die +(sprintf $fmt, @_), "\n";
- }
- }
-
- my $version_info = sprintf _(<<'EOT'), $this_program, $this_version;
- GNU %s %s
-
- Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software
- Foundation, Inc.
- This is free software; see the source for copying conditions. There is NO
- warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-
- Written by Brendan O'Dea <bod@debian.org>
- EOT
-
- my $help_info = sprintf _(<<'EOT'), $this_program, $this_program;
- `%s' generates a man page out of `--help' and `--version' output.
-
- Usage: %s [OPTION]... EXECUTABLE
-
- -n, --name=STRING description for the NAME paragraph
- -s, --section=SECTION section number for manual page (1, 6, 8)
- -m, --manual=TEXT name of manual (User Commands, ...)
- -S, --source=TEXT source of program (FSF, Debian, ...)
- -L, --locale=STRING select locale (default "C")
- -i, --include=FILE include material from `FILE'
- -I, --opt-include=FILE include material from `FILE' if it exists
- -o, --output=FILE send output to `FILE'
- -p, --info-page=TEXT name of Texinfo manual
- -N, --no-info suppress pointer to Texinfo manual
- --help print this help, then exit
- --version print version number, then exit
-
- EXECUTABLE should accept `--help' and `--version' options although
- alternatives may be specified using:
-
- -h, --help-option=STRING help option string
- -v, --version-option=STRING version option string
-
- Report bugs to <bug-help2man@gnu.org>.
- EOT
-
- my $section = 1;
- my $manual = '';
- my $source = '';
- my $locale = 'C';
- my $help_option = '--help';
- my $version_option = '--version';
- my ($opt_name, @opt_include, $opt_output, $opt_info, $opt_no_info);
-
- my %opt_def = (
- 'n|name=s' => \$opt_name,
- 's|section=s' => \$section,
- 'm|manual=s' => \$manual,
- 'S|source=s' => \$source,
- 'L|locale=s' => \$locale,
- 'i|include=s' => sub { push @opt_include, [ pop, 1 ] },
- 'I|opt-include=s' => sub { push @opt_include, [ pop, 0 ] },
- 'o|output=s' => \$opt_output,
- 'p|info-page=s' => \$opt_info,
- 'N|no-info' => \$opt_no_info,
- 'h|help-option=s' => \$help_option,
- 'v|version-option=s' => \$version_option,
- );
-
- # Parse options.
- Getopt::Long::config('bundling');
- GetOptions (%opt_def,
- help => sub { print $help_info; exit },
- version => sub { print $version_info; exit },
- ) or die $help_info;
-
- die $help_info unless @ARGV == 1;
-
- die "$this_program: no locale support (Locale::gettext required)\n"
- unless $locale eq 'C' or $have_gettext;
-
- # Set localisation of date and executable's ouput.
- delete @ENV{qw(LANGUAGE LC_MESSAGES LANG)};
- setlocale LC_ALL, $ENV{LC_ALL} = $locale;
-
- my %include = ();
- my %append = ();
- my @include = (); # retain order given in include file
-
- # Process include file (if given). Format is:
- #
- # [section name]
- # verbatim text
- #
- # or
- #
- # /pattern/
- # verbatim text
- #
-
- while (@opt_include)
- {
- my ($inc, $required) = @{shift @opt_include};
-
- next unless -f $inc or $required;
- kark N_("%s: can't open `%s' (%s)"), $this_program, $inc, $!
- unless open INC, $inc;
-
- my $key;
- my $hash = \%include;
-
- while (<INC>)
- {
- # [section]
- if (/^\[([^]]+)\]/)
- {
- $key = uc $1;
- $key =~ s/^\s+//;
- $key =~ s/\s+$//;
- $hash = \%include;
- push @include, $key unless $include{$key};
- next;
- }
-
- # /pattern/
- if (m!^/(.*)/([ims]*)!)
- {
- my $pat = $2 ? "(?$2)$1" : $1;
-
- # Check pattern.
- eval { $key = qr($pat) };
- if ($@)
- {
- $@ =~ s/ at .*? line \d.*//;
- die "$inc:$.:$@";
- }
-
- $hash = \%append;
- next;
- }
-
- # Check for options before the first section--anything else is
- # silently ignored, allowing the first for comments and
- # revision info.
- unless ($key)
- {
- # handle options
- if (/^-/)
- {
- local @ARGV = split;
- GetOptions %opt_def;
- }
-
- next;
- }
-
- $hash->{$key} ||= '';
- $hash->{$key} .= $_;
- }
-
- close INC;
-
- kark N_("%s: no valid information found in `%s'"), $this_program, $inc
- unless $key;
- }
-
- # Compress trailing blank lines.
- for my $hash (\(%include, %append))
- {
- for (keys %$hash) { $hash->{$_} =~ s/\n+$/\n/ }
- }
-
- # Grab help and version info from executable.
- my ($help_text, $version_text) = map {
- join '', map { s/ +$//; expand $_ } `$ARGV[0] $_ 2>/dev/null`
- or kark N_("%s: can't get `%s' info from %s"), $this_program,
- $_, $ARGV[0]
- } $help_option, $version_option;
-
- my $date = strftime "%B %Y", localtime;
- (my $program = $ARGV[0]) =~ s!.*/!!;
- my $package = $program;
- my $version;
-
- if ($opt_output)
- {
- unlink $opt_output or kark N_("%s: can't unlink %s (%s)"),
- $this_program, $opt_output, $! if -e $opt_output;
-
- open STDOUT, ">$opt_output"
- or kark N_("%s: can't create %s (%s)"), $this_program, $opt_output, $!;
- }
-
- # The first line of the --version information is assumed to be in one
- # of the following formats:
- #
- # <version>
- # <program> <version>
- # {GNU,Free} <program> <version>
- # <program> ({GNU,Free} <package>) <version>
- # <program> - {GNU,Free} <package> <version>
- #
- # and seperated from any copyright/author details by a blank line.
-
- ($_, $version_text) = split /\n+/, $version_text, 2;
-
- if (/^(\S+) +\(((?:GNU|Free) +[^)]+)\) +(.*)/ or
- /^(\S+) +- *((?:GNU|Free) +\S+) +(.*)/)
- {
- $program = $1;
- $package = $2;
- $version = $3;
- }
- elsif (/^((?:GNU|Free) +)?(\S+) +(.*)/)
- {
- $program = $2;
- $package = $1 ? "$1$2" : $2;
- $version = $3;
- }
- else
- {
- $version = $_;
- }
-
- $program =~ s!.*/!!;
-
- # No info for `info' itself.
- $opt_no_info = 1 if $program eq 'info';
-
- # --name overrides --include contents.
- $include{_('NAME')} = "$program \\- $opt_name\n" if $opt_name;
-
- # Default (useless) NAME paragraph.
- $include{_('NAME')} ||= sprintf _("%s \\- manual page for %s %s") . "\n",
- $program, $program, $version;
-
- # Man pages traditionally have the page title in caps.
- my $PROGRAM = uc $program;
-
- # Set default page head/footers
- $source ||= "$program $version";
- unless ($manual)
- {
- for ($section)
- {
- if (/^(1[Mm]|8)/) { $manual = _('System Administration Utilities') }
- elsif (/^6/) { $manual = _('Games') }
- else { $manual = _('User Commands') }
- }
- }
-
- # Extract usage clause(s) [if any] for SYNOPSIS.
- my $PAT_USAGE = _('Usage');
- my $PAT_USAGE_CONT = _('or');
- if ($help_text =~ s/^($PAT_USAGE):( +(\S+))(.*)((?:\n(?: {6}\1| *($PAT_USAGE_CONT): +\S).*)*)//om)
- {
- my @syn = $3 . $4;
-
- if ($_ = $5)
- {
- s/^\n//;
- for (split /\n/) { s/^ *(($PAT_USAGE_CONT): +)?//o; push @syn, $_ }
- }
-
- my $synopsis = '';
- for (@syn)
- {
- $synopsis .= ".br\n" if $synopsis;
- s!^\S*/!!;
- s/^(\S+) *//;
- $synopsis .= ".B $1\n";
- s/\s+$//;
- s/(([][]|\.\.+)+)/\\fR$1\\fI/g;
- s/^/\\fI/ unless s/^\\fR//;
- $_ .= '\fR';
- s/(\\fI)( *)/$2$1/g;
- s/\\fI\\fR//g;
- s/^\\fR//;
- s/\\fI$//;
- s/^\./\\&./;
-
- $synopsis .= "$_\n";
- }
-
- $include{_('SYNOPSIS')} ||= $synopsis;
- }
-
- # Process text, initial section is DESCRIPTION.
- my $sect = _('DESCRIPTION');
- $_ = "$help_text\n\n$version_text";
-
- # Normalise paragraph breaks.
- s/^\n+//;
- s/\n*$/\n/;
- s/\n\n+/\n\n/g;
-
- # Temporarily exchange leading dots, apostrophes and backslashes for
- # tokens.
- s/^\./\x80/mg;
- s/^'/\x81/mg;
- s/\\/\x82/g;
-
- my $PAT_BUGS = _('Report +bugs|Email +bug +reports +to');
- my $PAT_AUTHOR = _('Written +by');
- my $PAT_OPTIONS = _('Options');
- my $PAT_EXAMPLES = _('Examples');
- my $PAT_FREE_SOFTWARE = _('This +is +free +software');
-
- # Start a new paragraph (if required) for these.
- s/([^\n])\n($PAT_BUGS|$PAT_AUTHOR)/$1\n\n$2/og;
-
- sub convert_option;
-
- while (length)
- {
- # Convert some standard paragraph names.
- if (s/^($PAT_OPTIONS): *\n//o)
- {
- $sect = _('OPTIONS');
- next;
- }
- elsif (s/^($PAT_EXAMPLES): *\n//o)
- {
- $sect = _('EXAMPLES');
- next;
- }
-
- # Copyright section
- if (/^Copyright +[(\xa9]/)
- {
- $sect = _('COPYRIGHT');
- $include{$sect} ||= '';
- $include{$sect} .= ".PP\n" if $include{$sect};
-
- my $copy;
- ($copy, $_) = split /\n\n/, $_, 2;
-
- for ($copy)
- {
- # Add back newline
- s/\n*$/\n/;
-
- # Convert iso9959-1 copyright symbol or (c) to nroff
- # character.
- s/^Copyright +(?:\xa9|\([Cc]\))/Copyright \\(co/mg;
-
- # Insert line breaks before additional copyright messages
- # and the disclaimer.
- s/(.)\n(Copyright |$PAT_FREE_SOFTWARE)/$1\n.br\n$2/og;
-
- # Join hyphenated lines.
- s/([A-Za-z])-\n */$1/g;
- }
-
- $include{$sect} .= $copy;
- $_ ||= '';
- next;
- }
-
- # Catch bug report text.
- if (/^($PAT_BUGS) /o)
- {
- $sect = _('REPORTING BUGS');
- }
-
- # Author section.
- elsif (/^($PAT_AUTHOR)/o)
- {
- $sect = _('AUTHOR');
- }
-
- # Examples, indicated by an indented leading $, % or > are
- # rendered in a constant width font.
- if (/^( +)([\$\%>] )\S/)
- {
- my $indent = $1;
- my $prefix = $2;
- my $break = '.IP';
- $include{$sect} ||= '';
- while (s/^$indent\Q$prefix\E(\S.*)\n*//)
- {
- $include{$sect} .= "$break\n\\f(CW$prefix$1\\fR\n";
- $break = '.br';
- }
-
- next;
- }
-
- my $matched = '';
- $include{$sect} ||= '';
-
- # Sub-sections have a trailing colon and the second line indented.
- if (s/^(\S.*:) *\n / /)
- {
- $matched .= $& if %append;
- $include{$sect} .= qq(.SS "$1"\n);
- }
-
- my $indent = 0;
- my $content = '';
-
- # Option with description.
- if (s/^( {1,10}([+-]\S.*?))(?:( +(?!-))|\n( {20,}))(\S.*)\n//)
- {
- $matched .= $& if %append;
- $indent = length ($4 || "$1$3");
- $content = ".TP\n\x83$2\n\x83$5\n";
- unless ($4)
- {
- # Indent may be different on second line.
- $indent = length $& if /^ {20,}/;
- }
- }
-
- # Option without description.
- elsif (s/^ {1,10}([+-]\S.*)\n//)
- {
- $matched .= $& if %append;
- $content = ".HP\n\x83$1\n";
- $indent = 80; # not continued
- }
-
- # Indented paragraph with tag.
- elsif (s/^( +(\S.*?) +)(\S.*)\n//)
- {
- $matched .= $& if %append;
- $indent = length $1;
- $content = ".TP\n\x83$2\n\x83$3\n";
- }
-
- # Indented paragraph.
- elsif (s/^( +)(\S.*)\n//)
- {
- $matched .= $& if %append;
- $indent = length $1;
- $content = ".IP\n\x83$2\n";
- }
-
- # Left justified paragraph.
- else
- {
- s/(.*)\n//;
- $matched .= $& if %append;
- $content = ".PP\n" if $include{$sect};
- $content .= "$1\n";
- }
-
- # Append continuations.
- while ($indent ? s/^ {$indent}(\S.*)\n// : s/^(\S.*)\n//)
- {
- $matched .= $& if %append;
- $content .= "\x83$1\n"
- }
-
- # Move to next paragraph.
- s/^\n+//;
-
- for ($content)
- {
- # Leading dot and apostrophe protection.
- s/\x83\./\x80/g;
- s/\x83'/\x81/g;
- s/\x83//g;
-
- # Convert options.
- s/(^| )(-[][\w=-]+)/$1 . convert_option $2/mge;
- }
-
- # Check if matched paragraph contains /pat/.
- if (%append)
- {
- for my $pat (keys %append)
- {
- if ($matched =~ $pat)
- {
- $content .= ".PP\n" unless $append{$pat} =~ /^\./;
- $content .= $append{$pat};
- }
- }
- }
-
- $include{$sect} .= $content;
- }
-
- # Refer to the real documentation.
- unless ($opt_no_info)
- {
- my $info_page = $opt_info || $program;
-
- $sect = _('SEE ALSO');
- $include{$sect} ||= '';
- $include{$sect} .= ".PP\n" if $include{$sect};
- $include{$sect} .= sprintf _(<<'EOT'), $program, $info_page, $info_page;
- The full documentation for
- .B %s
- is maintained as a Texinfo manual. If the
- .B info
- and
- .B %s
- programs are properly installed at your site, the command
- .IP
- .B info %s
- .PP
- should give you access to the complete manual.
- EOT
- }
-
- # Output header.
- print <<EOT;
- .\\" DO NOT MODIFY THIS FILE! It was generated by $this_program $this_version.
- .TH $PROGRAM "$section" "$date" "$source" "$manual"
- EOT
-
- # Section ordering.
- my @pre = (_('NAME'), _('SYNOPSIS'), _('DESCRIPTION'), _('OPTIONS'),
- _('EXAMPLES'));
-
- my @post = (_('AUTHOR'), _('REPORTING BUGS'), _('COPYRIGHT'), _('SEE ALSO'));
- my $filter = join '|', @pre, @post;
-
- # Output content.
- for my $sect (@pre, (grep ! /^($filter)$/o, @include), @post)
- {
- if ($include{$sect})
- {
- my $lsect = gettext $sect;
- my $quote = $lsect =~ /\W/ ? '"' : '';
- print ".SH $quote$lsect$quote\n";
-
- for ($include{$sect})
- {
- # Replace leading dot, apostrophe and backslash tokens.
- s/\x80/\\&./g;
- s/\x81/\\&'/g;
- s/\x82/\\e/g;
-
- # Convert some latin1 chars to troff equivalents
- s/\xa0/\\ /g; # non-breaking space
-
- print;
- }
- }
- }
-
- close STDOUT or kark N_("%s: error writing to %s (%s)"), $this_program,
- $opt_output || 'stdout', $!;
-
- exit;
-
- # Convert option dashes to \- to stop nroff from hyphenating 'em, and
- # embolden. Option arguments get italicised.
- sub convert_option
- {
- local $_ = '\fB' . shift;
-
- s/-/\\-/g;
- unless (s/\[=(.*)\]$/\\fR[=\\fI$1\\fR]/)
- {
- s/=(.)/\\fR=\\fI$1/;
- s/ (.)/ \\fI$1/;
- $_ .= '\fR';
- }
-
- $_;
- }
-