193 lines
5.5 KiB
Perl
Executable File
193 lines
5.5 KiB
Perl
Executable File
#!/usr/bin/env perl
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#***************************************************************************
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# _ _ ____ _
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# Project ___| | | | _ \| |
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# / __| | | | |_) | |
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# | (__| |_| | _ <| |___
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# \___|\___/|_| \_\_____|
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#
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# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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#
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# This software is licensed as described in the file COPYING, which
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# you should have received as part of this distribution. The terms
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# are also available at https://curl.se/docs/copyright.html.
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#
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# You may opt to use, copy, modify, merge, publish, distribute and/or sell
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# copies of the Software, and permit persons to whom the Software is
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# furnished to do so, under the terms of the COPYING file.
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#
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# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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# KIND, either express or implied.
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#
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# SPDX-License-Identifier: curl
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#
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###########################################################################
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=begin comment
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This script converts an nroff file to curldown
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Example: cd2nroff [options] <file.md> > <file.3>
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Note: when converting .nf sections, this tool does not know if the
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section is code or just regular quotes. It then assumes and uses ~~~c
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for code.
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=end comment
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=cut
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my $nroff2cd = "0.1"; # to keep check
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sub single {
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my ($f)=@_;
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open(F, "<:crlf", "$f") ||
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return 1;
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my $line;
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my $title;
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my $section;
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my $source;
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my @seealso;
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my @desc;
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my $header; # non-zero when TH is passed
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my $quote = 0; # quote state
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while(<F>) {
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$line++;
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my $d = $_;
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if($_ =~ /^.\\\"/) {
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# a comment we can ignore
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next;
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}
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if(!$header) {
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if($d =~ /.so (.*)/) {
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# this is basically an include, so do that
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my $f = $1;
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# remove leading directory
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$f =~ s/(.*?\/)//;
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close(F);
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open(F, "<:crlf", "$f") || return 1;
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}
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if($d =~ /^\.TH ([^ ]*) (\d) \"(.*?)\" ([^ \n]*)/) {
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# header, this needs to be the first thing after leading comments
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$title = $1;
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$section = $2;
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# date is $3
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$source = $4;
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# if there are enclosing quotes around source, remove them
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$source =~ s/[\"\'](.*)[\"\']\z/$1/;
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$header = 1;
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print <<HEAD
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---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: $title
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Section: $section
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Source: $source
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HEAD
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;
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}
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next;
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}
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if($quote) {
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if($d =~ /^\.SH/) {
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#end of quote without an .fi
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$quote = 0;
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push @desc, "~~~\n";
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}
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elsif($d =~ /^\.fi/) {
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#end of quote
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$quote = 0;
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push @desc, "~~~\n";
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next;
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}
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else {
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# double-backslashes converted to single ones
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$d =~ s/\\\\/\\/g;
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push @desc, $d;
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next;
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}
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}
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if($d =~ /^\.SH (.*)/) {
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my $word = $1;
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# if there are enclosing quotes, remove them first
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$word =~ s/[\"\'](.*)[\"\']\z/$1/;
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if($word eq "SEE ALSO") {
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# we just slurp up this section
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next;
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}
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push @desc, "\n# $word\n\n";
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}
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elsif($d =~ /^\.(RS|RE)/) {
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# ignore these
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}
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elsif($d =~ /^\.IP (.*)/) {
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my $word = $1;
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# if there are enclosing quotes, remove them first
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$word =~ s/[\"\'](.*)[\"\']\z/$1/;
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push @desc, "\n## $word\n\n";
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}
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elsif($d =~ /^\.IP/) {
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# .IP with no text we just skip
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}
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elsif($d =~ /^\.BR (.*)/) {
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# only used for SEE ALSO
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my $word = $1;
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# remove trailing comma
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$word =~ s/,\z//;
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for my $s (split(/,/, $word)) {
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# remove all double quotes
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$s =~ s/\"//g;
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# tream leading whitespace
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$s =~ s/^ +//g;
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push @seealso, $s;
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}
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}
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elsif($d =~ /^\.I (.*)/) {
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push @desc, "*$1*\n";
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}
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elsif($d =~ /^\.B (.*)/) {
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push @desc, "**$1**\n";
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}
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elsif($d =~ /^\.nf/) {
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push @desc, "~~~c\n";
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$quote = 1;
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}
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else {
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# embolden
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$d =~ s/\\fB(.*?)\\fP/**$1**/g;
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# links to "curl.*()" are left bare since cd2nroff handles them
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# specially
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$d =~ s/\\fI(curl.*?\(3\))\\fP/$1/ig;
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# emphasize
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$d =~ s/\\fI(.*?)\\fP/*$1*/g;
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# emphasize on a split line
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$d =~ s/\\fI/*/g;
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# bold on a split line
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$d =~ s/\\fB/**/g;
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# remove backslash amp
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$d =~ s/\\&//g;
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# remove backslashes
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$d =~ s/\\//g;
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# fix single quotes
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$d =~ s/\(aq/'/g;
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# fix double quotes
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$d =~ s/\(dq/\"/g;
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push @desc, $d;
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}
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}
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close(F);
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print "See-also:\n";
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for my $s (sort @seealso) {
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print " - $s\n" if($s);
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}
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print "---\n";
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print @desc;
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return !$header;
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}
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exit single($ARGV[0]);
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