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Commit | Line | Data |
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6251188c ZW |
1 | #! /usr/bin/perl -w |
2 | ||
3 | # This does trivial (and I mean _trivial_) conversion of Texinfo | |
4 | # markup to Perl POD format. It's intended to be used to extract | |
5 | # something suitable for a manpage from a Texinfo document. | |
6 | ||
6251188c ZW |
7 | $output = 0; |
8 | $ignore = 0; | |
3d6f4d76 | 9 | $skipping = 0; |
6251188c ZW |
10 | %sects = (); |
11 | $section = ""; | |
12 | @icstack = (); | |
13 | @endwstack = (); | |
3d6f4d76 | 14 | @skstack = (); |
6251188c | 15 | $shift = ""; |
3d6f4d76 | 16 | %defs = (); |
6251188c | 17 | |
3d6f4d76 ZW |
18 | while($_ = shift) |
19 | { | |
20 | if (/^-D(.*)$/) { | |
21 | if ($1 ne "") { | |
22 | $flag = $1; | |
23 | } else { | |
24 | $flag = shift; | |
25 | } | |
26 | die "no flag specified for -D\n" | |
27 | unless $flag ne ""; | |
28 | die "flags may only contain letters, digits, hyphens, and underscores\n" | |
29 | unless $flag =~ /^[a-zA-Z0-9_-]+$/; | |
30 | $defs{$flag} = ""; | |
31 | } elsif (/^-/) { | |
32 | usage(); | |
33 | } else { | |
34 | $in = $_, next unless defined $in; | |
35 | $out = $_, next unless defined $out; | |
36 | usage(); | |
37 | } | |
38 | } | |
39 | ||
40 | if (defined $in) { | |
41 | open(STDIN, $in) or die "opening \"$in\": $!\n"; | |
42 | } | |
43 | if (defined $out) { | |
44 | open(STDOUT, ">$out") or die "opening \"$out\": $!\n"; | |
45 | } | |
46 | ||
47 | while(<STDIN>) | |
6251188c ZW |
48 | { |
49 | chomp; | |
6251188c ZW |
50 | /^\@c man begin ([A-Z]+)/ and $sect = $1, $output = 1, next; |
51 | /^\@c man end/ and do { | |
52 | $_ = $section; | |
6251188c ZW |
53 | |
54 | s/\@(?:dfn|var|emph|cite)\{([^\}]*)\}/I<$1>/g; | |
55 | s/\@(?:code|kbd)\{([^\}]*)\}/C<$1>/g; | |
56 | s/\@(?:samp|strong|key)\{([^\}]*)\}/B<$1>/g; | |
3d6f4d76 ZW |
57 | s/\@value\{([a-zA-Z0-9_-]+)\}/$defs{$1}/g; |
58 | s/\@sc\{([^\}]*)\}/\U$1/g; | |
6251188c ZW |
59 | s/\@file\{([^\}]*)\}/F<$1>/g; |
60 | s/\@(?:url|email)\{([^\}]*)\}/E<lt>C<$1>E<rt>/g; | |
3d6f4d76 ZW |
61 | s/\@xref\{(?:[^\}]*)\}[^.]*.//g; |
62 | s/\s+\(\@p[a-z]?ref\{(?:[^\}]*)\}\)//g; | |
6251188c ZW |
63 | s/\@copyright\{\}//g; |
64 | s/\@noindent\s*//g; | |
65 | s/\@refill//g; | |
66 | s/\@\././g; | |
67 | ||
3d6f4d76 ZW |
68 | # Turn B<blah I<blah> blah> into B<blah> I<blah> B<blah> to |
69 | # match Texinfo semantics of @emph inside @samp. | |
70 | ||
6251188c ZW |
71 | s/</</g; |
72 | s/>/>/g; | |
3d6f4d76 ZW |
73 | 1 while (s/B<([^<>]*)I<([^>]+)>/B<$1>I<$2>B</g); |
74 | 1 while (s/I<([^<>]*)B<([^>]+)>/I<$1>B<$2>I</g); | |
75 | s/[BI]<>//g; | |
76 | s/([BI])<(\s+)([^>]+)>/$2$1<$3>/g; | |
77 | s/([BI])<([^>]+?)(\s+)>/$1<$2>$3/g; | |
78 | ||
79 | s/</E<lt>/g; | |
80 | s/>/E<gt>/g; | |
81 | s/{/\{/g; | |
82 | s/}/\}/g; | |
6251188c ZW |
83 | |
84 | $sects{$sect} = $_; | |
85 | $section = ""; | |
86 | $output = 0; | |
87 | next; | |
88 | }; | |
3d6f4d76 | 89 | |
6251188c | 90 | /^\@(c|[a-z]+index)\b/ and next; |
3d6f4d76 ZW |
91 | /^\@subsection/ and next; |
92 | /^\@need/ and next; | |
93 | /^\@node/ and next; | |
6251188c ZW |
94 | |
95 | /^\@setfilename\s+([^.]+)/ and $fn = $1, next; | |
96 | /^\@settitle\s+([^.]+)/ and $tl = $1, next; | |
97 | ||
98 | next unless $output; | |
99 | ||
3d6f4d76 ZW |
100 | /^\@end\s+([a-z]+)/ and do { |
101 | if(defined $endw) | |
102 | { | |
103 | die "\@$endw ended by \@end $1 at line $.\n" | |
104 | unless $1 eq $endw; | |
105 | ||
106 | if($endw =~ /example$/) | |
107 | { | |
108 | $shift = ""; | |
109 | $_ = ""; | |
110 | } | |
111 | elsif($endw =~ /^if/) | |
112 | { | |
113 | $skipping = pop @skstack; | |
114 | $_ = ""; | |
115 | } | |
116 | else | |
117 | { | |
118 | $_ = "\n=back\n"; | |
119 | $ic = pop @icstack; | |
120 | } | |
121 | $endw = pop @endwstack; | |
122 | } | |
123 | }; | |
124 | ||
125 | /^\@end ignore/ and $ignore = 0, next; | |
126 | next if $ignore; | |
127 | next if $skipping; | |
128 | ||
6251188c ZW |
129 | /^\@ignore/ and $ignore = 1, next; |
130 | ||
3d6f4d76 ZW |
131 | /^\@set\s+([a-zA-Z0-9_-]+)\s*(.*)$/ and $defs{$1} = $2, next; |
132 | /^\@clear\s+([a-zA-Z0-9_-]+)/ and delete $defs{$1}, next; | |
133 | ||
134 | /^\@ifset\s+([a-zA-Z0-9_-]+)/ and do { | |
135 | push @endwstack, $endw; | |
136 | push @skstack, $skipping; | |
137 | $endw = "ifset"; | |
138 | $skipping = 1 unless exists $defs{$1}; | |
139 | }; | |
140 | ||
141 | /^\@ifclear\s+([a-zA-Z0-9_-]+)/ and do { | |
142 | push @endwstack, $endw; | |
143 | push @skstack, $skipping; | |
144 | $endw = "ifset"; | |
145 | $skipping = 1 if exists $defs{$1}; | |
146 | }; | |
147 | ||
6251188c ZW |
148 | /^\@itemize (\@[a-z]+)/ and do { |
149 | push @endwstack, $endw; | |
150 | push @icstack, $ic; | |
151 | $ic = $1; | |
152 | $ic =~ s/\@bullet/*/; | |
153 | $ic =~ s/\@minus/-/; | |
154 | $_ = "\n=over 4\n"; | |
155 | $endw = "itemize"; | |
156 | }; | |
157 | ||
158 | /^\@enumerate\s+([A-Z0-9]+)/ and do { | |
159 | push @endwstack, $endw; | |
160 | push @icstack, $ic; | |
161 | $ic = $1 . "."; | |
162 | $_ = "\n=over 4\n"; | |
163 | $endw = "enumerate"; | |
164 | }; | |
165 | ||
166 | /^\@table\s+(\@[a-z]+)/ and do { | |
167 | push @endwstack, $endw; | |
168 | push @icstack, $ic; | |
169 | $ic = $1; | |
170 | $ic =~ s/\@(?:samp|strong|key)/B/; | |
171 | $ic =~ s/\@(?:code|kbd)/C/; | |
172 | $ic =~ s/\@(?:dfn|var|emph|cite)/I/; | |
173 | $ic =~ s/\@(?:file)/F/; | |
174 | $_ = "\n=over 4\n"; | |
175 | $endw = "table"; | |
176 | }; | |
177 | ||
178 | /^\@((?:small)?example)/ and do { | |
179 | push @endwstack, $endw; | |
180 | $endw = $1; | |
181 | $shift = "\t"; | |
182 | next; | |
183 | }; | |
184 | ||
6251188c ZW |
185 | /^\@itemx?\s*(.+)?$/ and do { |
186 | if(defined $1) | |
187 | { | |
188 | $_ = "=item $ic\<$1\>\n"; | |
189 | } | |
190 | else | |
191 | { | |
192 | $_ = "=item $ic\n"; | |
193 | $ic =~ y/A-Ya-y1-8/B-Zb-z2-9/; | |
194 | } | |
195 | }; | |
3d6f4d76 ZW |
196 | |
197 | /^\@section\s+(.+)$/ and do { | |
198 | $_ = "\n=head2 $1\n"; | |
199 | }; | |
200 | ||
201 | # POD doesn't interpret E<> inside a verbatim block. | |
202 | if ($shift eq "") { | |
203 | s/</</g; | |
204 | s/>/>/g; | |
205 | } else { | |
206 | s/</</g; | |
207 | s/>/>/g; | |
208 | } | |
209 | s/\@\{/{/g; | |
210 | s/\@\}/}/g; | |
6251188c ZW |
211 | $section .= $shift.$_."\n"; |
212 | } | |
213 | ||
214 | $sects{NAME} = "$fn \- $tl\n"; | |
215 | ||
216 | for $sect (qw(NAME SYNOPSIS DESCRIPTION OPTIONS ENVIRONMENT FILES | |
217 | BUGS NOTES SEEALSO AUTHOR COPYRIGHT)) | |
218 | { | |
219 | if(exists $sects{$sect}) | |
220 | { | |
221 | $head = $sect; | |
222 | $head =~ s/SEEALSO/SEE ALSO/; | |
223 | print "=head1 $head\n\n"; | |
224 | print $sects{$sect}; | |
225 | print "\n"; | |
226 | } | |
227 | } | |
3d6f4d76 ZW |
228 | |
229 | sub usage | |
230 | { | |
231 | die "usage: $0 [-D toggle...] [infile [outfile]]\n"; | |
232 | } |