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4633a7c4 |
1 | #!/usr/local/bin/perl |
2 | |
3 | use Config; |
4 | use File::Basename qw(&basename &dirname); |
5 | |
85880f03 |
6 | # List explicitly here the variables you want Configure to |
7 | # generate. Metaconfig only looks for shell variables, so you |
8 | # have to mention them as if they were shell variables, not |
9 | # %Config entries. Thus you write |
4633a7c4 |
10 | # $startperl |
85880f03 |
11 | # to ensure Configure will look for $Config{startperl}. |
4633a7c4 |
12 | |
13 | # This forces PL files to create target in same directory as PL file. |
14 | # This is so that make depend always knows where to find PL derivatives. |
44a8e56a |
15 | chdir dirname($0); |
16 | $file = basename($0, '.PL'); |
774d564b |
17 | $file .= '.com' if $^O eq 'VMS'; |
4633a7c4 |
18 | |
19 | open OUT,">$file" or die "Can't create $file: $!"; |
20 | |
21 | print "Extracting $file (with variable substitutions)\n"; |
22 | |
23 | # In this section, perl variables will be expanded during extraction. |
24 | # You can use $Config{...} to use Configure variables. |
25 | |
85880f03 |
26 | print OUT <<"!GROK!THIS!"; |
5f05dabc |
27 | $Config{startperl} |
28 | eval 'exec $Config{perlpath} -S \$0 \${1+"\$@"}' |
29 | if \$running_under_some_shell; |
55497cff |
30 | |
31 | \@pagers = (); |
32 | push \@pagers, "$Config{'pager'}" if -x "$Config{'pager'}"; |
4633a7c4 |
33 | !GROK!THIS! |
34 | |
35 | # In the following, perl variables are not expanded during extraction. |
36 | |
37 | print OUT <<'!NO!SUBS!'; |
38 | |
39 | # |
40 | # Perldoc revision #1 -- look up a piece of documentation in .pod format that |
41 | # is embedded in the perl installation tree. |
42 | # |
43 | # This is not to be confused with Tom Christianson's perlman, which is a |
44 | # man replacement, written in perl. This perldoc is strictly for reading |
45 | # the perl manuals, though it too is written in perl. |
4633a7c4 |
46 | |
47 | if(@ARGV<1) { |
0b166b66 |
48 | $me = $0; # Editing $0 is unportable |
fb73857a |
49 | $me =~ s,.*/,,; |
4633a7c4 |
50 | die <<EOF; |
0b166b66 |
51 | Usage: $me [-h] [-v] [-t] [-u] [-m] [-l] PageName|ModuleName|ProgramName |
52 | $me -f PerlFunc |
4633a7c4 |
53 | |
54 | We suggest you use "perldoc perldoc" to get aquainted |
55 | with the system. |
56 | EOF |
57 | } |
58 | |
59 | use Getopt::Std; |
59586d77 |
60 | use Config '%Config'; |
61 | |
fb73857a |
62 | @global_found = (); |
63 | $global_target = ""; |
64 | |
7eda7aea |
65 | $Is_VMS = $^O eq 'VMS'; |
137443ea |
66 | $Is_MSWin32 = $^O eq 'MSWin32'; |
4633a7c4 |
67 | |
68 | sub usage{ |
ff0cee69 |
69 | warn "@_\n" if @_; |
70 | # Erase evidence of previous errors (if any), so exit status is simple. |
71 | $! = 0; |
4633a7c4 |
72 | die <<EOF; |
31bdbec1 |
73 | perldoc [options] PageName|ModuleName|ProgramName... |
74 | perldoc [options] -f BuiltinFunction |
75 | |
76 | Options: |
137443ea |
77 | -h Display this help message |
78 | -t Display pod using pod2text instead of pod2man and nroff |
79 | (-t is the default on win32) |
85880f03 |
80 | -u Display unformatted pod text |
7eda7aea |
81 | -m Display modules file in its entirety |
44a8e56a |
82 | -l Display the modules file name |
137443ea |
83 | -v Verbosely describe what's going on |
31bdbec1 |
84 | |
4633a7c4 |
85 | PageName|ModuleName... |
86 | is the name of a piece of documentation that you want to look at. You |
87 | may either give a descriptive name of the page (as in the case of |
88 | `perlfunc') the name of a module, either like `Term::Info', |
89 | `Term/Info', the partial name of a module, like `info', or |
90 | `makemaker', or the name of a program, like `perldoc'. |
31bdbec1 |
91 | |
92 | BuiltinFunction |
93 | is the name of a perl function. Will extract documentation from |
94 | `perlfunc'. |
4633a7c4 |
95 | |
96 | Any switches in the PERLDOC environment variable will be used before the |
97 | command line arguments. |
98 | |
99 | EOF |
100 | } |
101 | |
102 | use Text::ParseWords; |
103 | |
104 | |
105 | unshift(@ARGV,shellwords($ENV{"PERLDOC"})); |
106 | |
31bdbec1 |
107 | getopts("mhtluvf:") || usage; |
85880f03 |
108 | |
109 | usage if $opt_h || $opt_h; # avoid -w warning |
4633a7c4 |
110 | |
137443ea |
111 | if ($opt_t + $opt_u + $opt_m + $opt_l > 1) { |
112 | usage("only one of -t, -u, -m or -l") |
113 | } elsif ($Is_MSWin32) { |
114 | $opt_t = 1 unless $opt_t + $opt_u + $opt_m + $opt_l; |
115 | } |
4633a7c4 |
116 | |
7eda7aea |
117 | if ($opt_t) { require Pod::Text; import Pod::Text; } |
4633a7c4 |
118 | |
31bdbec1 |
119 | if ($opt_f) { |
120 | @pages = ("perlfunc"); |
121 | } else { |
122 | @pages = @ARGV; |
123 | } |
124 | |
fb73857a |
125 | # Does this look like a module or extension directory? |
126 | if (-f "Makefile.PL") { |
127 | # Add ., lib and blib/* libs to @INC (if they exist) |
128 | unshift(@INC, '.'); |
129 | unshift(@INC, 'lib') if -d 'lib'; |
130 | require ExtUtils::testlib; |
131 | } |
132 | |
31bdbec1 |
133 | |
85880f03 |
134 | |
4633a7c4 |
135 | sub containspod { |
fb73857a |
136 | my($file, $readit) = @_; |
137 | return 1 if !$readit && $file =~ /\.pod$/i; |
138 | local($_); |
139 | open(TEST,"<$file"); |
140 | while(<TEST>) { |
141 | if(/^=head/) { |
142 | close(TEST); |
143 | return 1; |
4633a7c4 |
144 | } |
fb73857a |
145 | } |
146 | close(TEST); |
147 | return 0; |
4633a7c4 |
148 | } |
149 | |
84902520 |
150 | sub minus_f_nocase { |
4633a7c4 |
151 | my($file) = @_; |
84902520 |
152 | # on a case-forgiving file system we can simply use -f $file |
153 | if ($Is_VMS or $Is_MSWin32 or $^O eq 'os2') { |
fb73857a |
154 | return $file if -f $file and -r _; |
155 | warn "Ignored $file: unreadable\n" unless -r _; |
156 | return ''; |
84902520 |
157 | } |
4633a7c4 |
158 | local *DIR; |
159 | local($")="/"; |
160 | my(@p,$p,$cip); |
161 | foreach $p (split(/\//, $file)){ |
fb73857a |
162 | my $try = "@p/$p"; |
163 | stat $try; |
164 | if (-d _){ |
4633a7c4 |
165 | push @p, $p; |
fb73857a |
166 | if ( $p eq $global_target) { |
167 | $tmp_path = join ('/', @p); |
168 | my $path_f = 0; |
169 | for (@global_found) { |
170 | $path_f = 1 if $_ eq $tmp_path; |
171 | } |
172 | push (@global_found, $tmp_path) unless $path_f; |
173 | print STDERR "Found as @p but directory\n" if $opt_v; |
174 | } |
175 | } elsif (-f _ && -r _) { |
176 | return $try; |
177 | } elsif (-f _) { |
178 | warn "Ignored $try: unreadable\n"; |
4633a7c4 |
179 | } else { |
180 | my $found=0; |
181 | my $lcp = lc $p; |
182 | opendir DIR, "@p"; |
183 | while ($cip=readdir(DIR)) { |
184 | if (lc $cip eq $lcp){ |
185 | $found++; |
186 | last; |
187 | } |
188 | } |
189 | closedir DIR; |
190 | return "" unless $found; |
191 | push @p, $cip; |
fb73857a |
192 | return "@p" if -f "@p" and -r _; |
193 | warn "Ignored $file: unreadable\n" if -f _; |
4633a7c4 |
194 | } |
195 | } |
196 | return; # is not a file |
fb73857a |
197 | } |
4633a7c4 |
198 | |
fb73857a |
199 | |
200 | sub check_file { |
201 | my($file) = @_; |
202 | return minus_f_nocase($file) && containspod($file) ? $file : ""; |
203 | } |
204 | |
205 | |
206 | sub searchfor { |
207 | my($recurse,$s,@dirs) = @_; |
208 | $s =~ s!::!/!g; |
209 | $s = VMS::Filespec::unixify($s) if $Is_VMS; |
210 | return $s if -f $s && containspod($s); |
211 | printf STDERR "Looking for $s in @dirs\n" if $opt_v; |
212 | my $ret; |
213 | my $i; |
214 | my $dir; |
215 | $global_target = (split('/', $s))[-1]; |
216 | for ($i=0; $i<@dirs; $i++) { |
217 | $dir = $dirs[$i]; |
218 | ($dir = VMS::Filespec::unixpath($dir)) =~ s!/$!! if $Is_VMS; |
219 | if ( ( $ret = check_file "$dir/$s.pod") |
220 | or ( $ret = check_file "$dir/$s.pm") |
221 | or ( $ret = check_file "$dir/$s") |
222 | or ( $Is_VMS and |
223 | $ret = check_file "$dir/$s.com") |
59586d77 |
224 | or ( $^O eq 'os2' and |
fb73857a |
225 | $ret = check_file "$dir/$s.cmd") |
59586d77 |
226 | or ( ($Is_MSWin32 or $^O eq 'os2') and |
fb73857a |
227 | $ret = check_file "$dir/$s.bat") |
228 | or ( $ret = check_file "$dir/pod/$s.pod") |
229 | or ( $ret = check_file "$dir/pod/$s") |
230 | ) { |
231 | return $ret; |
232 | } |
233 | |
234 | if ($recurse) { |
235 | opendir(D,$dir); |
236 | my @newdirs = map "$dir/$_", grep { |
237 | not /^\.\.?$/ and |
238 | not /^auto$/ and # save time! don't search auto dirs |
239 | -d "$dir/$_" |
240 | } readdir D; |
241 | closedir(D); |
242 | next unless @newdirs; |
243 | @newdirs = map((s/.dir$//,$_)[1],@newdirs) if $Is_VMS; |
244 | print STDERR "Also looking in @newdirs\n" if $opt_v; |
245 | push(@dirs,@newdirs); |
246 | } |
247 | } |
248 | return (); |
249 | } |
4633a7c4 |
250 | |
251 | |
252 | foreach (@pages) { |
253 | print STDERR "Searching for $_\n" if $opt_v; |
254 | # We must look both in @INC for library modules and in PATH |
255 | # for executables, like h2xs or perldoc itself. |
256 | @searchdirs = @INC; |
7eda7aea |
257 | unless ($opt_m) { |
258 | if ($Is_VMS) { |
259 | my($i,$trn); |
260 | for ($i = 0; $trn = $ENV{'DCL$PATH'.$i}; $i++) { |
261 | push(@searchdirs,$trn); |
262 | } |
263 | } else { |
59586d77 |
264 | push(@searchdirs, grep(-d, split($Config{path_sep}, |
265 | $ENV{'PATH'}))); |
7eda7aea |
266 | } |
267 | @files= searchfor(0,$_,@searchdirs); |
85880f03 |
268 | } |
4633a7c4 |
269 | if( @files ) { |
270 | print STDERR "Found as @files\n" if $opt_v; |
271 | } else { |
272 | # no match, try recursive search |
273 | |
274 | @searchdirs = grep(!/^\.$/,@INC); |
275 | |
4633a7c4 |
276 | @files= searchfor(1,$_,@searchdirs); |
277 | if( @files ) { |
85880f03 |
278 | print STDERR "Loosely found as @files\n" if $opt_v; |
4633a7c4 |
279 | } else { |
fb73857a |
280 | print STDERR "No documentation found for \"$_\".\n"; |
281 | if (@global_found) { |
282 | print STDERR "However, try\n"; |
283 | my $dir = $file = ""; |
284 | for $dir (@global_found) { |
285 | opendir(DIR, $dir) or die "$!"; |
286 | while ($file = readdir(DIR)) { |
287 | next if ($file =~ /^\./); |
288 | $file =~ s/\.(pm|pod)$//; |
289 | print STDERR "\tperldoc $_\::$file\n"; |
290 | } |
291 | closedir DIR; |
292 | } |
293 | } |
4633a7c4 |
294 | } |
295 | } |
296 | push(@found,@files); |
297 | } |
298 | |
299 | if(!@found) { |
85880f03 |
300 | exit ($Is_VMS ? 98962 : 1); |
4633a7c4 |
301 | } |
302 | |
44a8e56a |
303 | if ($opt_l) { |
304 | print join("\n", @found), "\n"; |
305 | exit; |
306 | } |
307 | |
31bdbec1 |
308 | if( ! -t STDOUT ) { $no_tty = 1 } |
4633a7c4 |
309 | |
137443ea |
310 | if ($Is_MSWin32) { |
311 | $tmp = "$ENV{TEMP}\\perldoc1.$$"; |
312 | push @pagers, qw( more< less notepad ); |
55497cff |
313 | unshift @pagers, $ENV{PAGER} if $ENV{PAGER}; |
137443ea |
314 | } elsif ($Is_VMS) { |
4633a7c4 |
315 | $tmp = 'Sys$Scratch:perldoc.tmp1_'.$$; |
55497cff |
316 | push @pagers, qw( most more less type/page ); |
137443ea |
317 | } else { |
59586d77 |
318 | if ($^O eq 'os2') { |
319 | require POSIX; |
320 | $tmp = POSIX::tmpnam(); |
321 | } else { |
322 | $tmp = "/tmp/perldoc1.$$"; |
323 | } |
137443ea |
324 | push @pagers, qw( more less pg view cat ); |
325 | unshift @pagers, $ENV{PAGER} if $ENV{PAGER}; |
4633a7c4 |
326 | } |
44a8e56a |
327 | unshift @pagers, $ENV{PERLDOC_PAGER} if $ENV{PERLDOC_PAGER}; |
4633a7c4 |
328 | |
7eda7aea |
329 | if ($opt_m) { |
1e422769 |
330 | foreach $pager (@pagers) { |
331 | system("$pager @found") or exit; |
332 | } |
333 | if ($Is_VMS) { eval 'use vmsish qw(status exit); exit $?' } |
334 | exit 1; |
7eda7aea |
335 | } |
336 | |
31bdbec1 |
337 | if ($opt_f) { |
338 | my $perlfunc = shift @found; |
339 | open(PFUNC, $perlfunc) or die "Can't open $perlfunc: $!"; |
340 | |
341 | # Skip introduction |
342 | while (<PFUNC>) { |
343 | last if /^=head2 Alphabetical Listing of Perl Functions/; |
344 | } |
345 | |
346 | # Look for our function |
347 | my $found = 0; |
fb73857a |
348 | my @pod; |
31bdbec1 |
349 | while (<PFUNC>) { |
350 | if (/^=item\s+\Q$opt_f\E\b/o) { |
fb73857a |
351 | $found = 1; |
31bdbec1 |
352 | } elsif (/^=item/) { |
fb73857a |
353 | last if $found > 1; |
31bdbec1 |
354 | } |
fb73857a |
355 | next unless $found; |
356 | push @pod, $_; |
357 | ++$found if /^\w/; # found descriptive text |
31bdbec1 |
358 | } |
359 | if (@pod) { |
360 | if ($opt_t) { |
361 | open(FORMATTER, "| pod2text") || die "Can't start filter"; |
362 | print FORMATTER "=over 8\n\n"; |
363 | print FORMATTER @pod; |
364 | print FORMATTER "=back\n"; |
365 | close(FORMATTER); |
366 | } else { |
367 | print @pod; |
368 | } |
369 | } else { |
ed5c9e50 |
370 | die "No documentation for perl function `$opt_f' found\n"; |
31bdbec1 |
371 | } |
372 | exit; |
373 | } |
374 | |
4633a7c4 |
375 | foreach (@found) { |
7eda7aea |
376 | |
85880f03 |
377 | if($opt_t) { |
378 | open(TMP,">>$tmp"); |
379 | Pod::Text::pod2text($_,*TMP); |
380 | close(TMP); |
381 | } elsif(not $opt_u) { |
1e422769 |
382 | my $cmd = "pod2man --lax $_ | nroff -man"; |
383 | $cmd .= " | col -x" if $^O =~ /hpux/; |
384 | $rslt = `$cmd`; |
385 | unless(($err = $?)) { |
386 | open(TMP,">>$tmp"); |
387 | print TMP $rslt; |
388 | close TMP; |
40fc7247 |
389 | } |
85880f03 |
390 | } |
4633a7c4 |
391 | |
85880f03 |
392 | if( $opt_u or $err or -z $tmp) { |
4633a7c4 |
393 | open(OUT,">>$tmp"); |
394 | open(IN,"<$_"); |
85880f03 |
395 | $cut = 1; |
396 | while (<IN>) { |
397 | $cut = $1 eq 'cut' if /^=(\w+)/; |
398 | next if $cut; |
399 | print OUT; |
400 | } |
4633a7c4 |
401 | close(IN); |
402 | close(OUT); |
403 | } |
404 | } |
405 | |
31bdbec1 |
406 | if( $no_tty ) { |
4633a7c4 |
407 | open(TMP,"<$tmp"); |
408 | print while <TMP>; |
409 | close(TMP); |
410 | } else { |
85880f03 |
411 | foreach $pager (@pagers) { |
1e422769 |
412 | system("$pager $tmp") or last; |
4633a7c4 |
413 | } |
414 | } |
415 | |
416 | 1 while unlink($tmp); #Possibly pointless VMSism |
417 | |
418 | exit 0; |
7eda7aea |
419 | |
420 | __END__ |
421 | |
422 | =head1 NAME |
423 | |
424 | perldoc - Look up Perl documentation in pod format. |
425 | |
426 | =head1 SYNOPSIS |
427 | |
44a8e56a |
428 | B<perldoc> [B<-h>] [B<-v>] [B<-t>] [B<-u>] [B<-m>] [B<-l>] PageName|ModuleName|ProgramName |
7eda7aea |
429 | |
31bdbec1 |
430 | B<perldoc> B<-f> BuiltinFunction |
431 | |
7eda7aea |
432 | =head1 DESCRIPTION |
433 | |
40fc7247 |
434 | I<perldoc> looks up a piece of documentation in .pod format that is embedded |
435 | in the perl installation tree or in a perl script, and displays it via |
436 | C<pod2man | nroff -man | $PAGER>. (In addition, if running under HP-UX, |
437 | C<col -x> will be used.) This is primarily used for the documentation for |
438 | the perl library modules. |
7eda7aea |
439 | |
440 | Your system may also have man pages installed for those modules, in |
441 | which case you can probably just use the man(1) command. |
442 | |
443 | =head1 OPTIONS |
444 | |
445 | =over 5 |
446 | |
447 | =item B<-h> help |
448 | |
449 | Prints out a brief help message. |
450 | |
451 | =item B<-v> verbose |
452 | |
453 | Describes search for the item in detail. |
454 | |
455 | =item B<-t> text output |
456 | |
457 | Display docs using plain text converter, instead of nroff. This may be faster, |
458 | but it won't look as nice. |
459 | |
460 | =item B<-u> unformatted |
461 | |
462 | Find docs only; skip reformatting by pod2* |
463 | |
464 | =item B<-m> module |
465 | |
466 | Display the entire module: both code and unformatted pod documentation. |
467 | This may be useful if the docs don't explain a function in the detail |
468 | you need, and you'd like to inspect the code directly; perldoc will find |
469 | the file for you and simply hand it off for display. |
470 | |
44a8e56a |
471 | =item B<-l> file name only |
472 | |
473 | Display the file name of the module found. |
474 | |
31bdbec1 |
475 | =item B<-f> perlfunc |
476 | |
477 | The B<-f> option followed by the name of a perl built in function will |
478 | extract the documentation of this function from L<perlfunc>. |
479 | |
7eda7aea |
480 | =item B<PageName|ModuleName|ProgramName> |
481 | |
482 | The item you want to look up. Nested modules (such as C<File::Basename>) |
483 | are specified either as C<File::Basename> or C<File/Basename>. You may also |
484 | give a descriptive name of a page, such as C<perlfunc>. You make also give a |
485 | partial or wrong-case name, such as "basename" for "File::Basename", but |
486 | this will be slower, if there is more then one page with the same partial |
487 | name, you will only get the first one. |
488 | |
489 | =back |
490 | |
491 | =head1 ENVIRONMENT |
492 | |
493 | Any switches in the C<PERLDOC> environment variable will be used before the |
494 | command line arguments. C<perldoc> also searches directories |
495 | specified by the C<PERL5LIB> (or C<PERLLIB> if C<PERL5LIB> is not |
496 | defined) and C<PATH> environment variables. |
497 | (The latter is so that embedded pods for executables, such as |
498 | C<perldoc> itself, are available.) |
499 | |
500 | =head1 AUTHOR |
501 | |
502 | Kenneth Albanowski <kjahds@kjahds.com> |
503 | |
504 | Minor updates by Andy Dougherty <doughera@lafcol.lafayette.edu> |
505 | |
7eda7aea |
506 | =cut |
507 | |
508 | # |
137443ea |
509 | # Version 1.12: Sat Apr 12 22:41:09 EST 1997 |
510 | # Gurusamy Sarathy <gsar@umich.edu> |
511 | # -various fixes for win32 |
7eda7aea |
512 | # Version 1.11: Tue Dec 26 09:54:33 EST 1995 |
513 | # Kenneth Albanowski <kjahds@kjahds.com> |
514 | # -added Charles Bailey's further VMS patches, and -u switch |
515 | # -added -t switch, with pod2text support |
516 | # |
517 | # Version 1.10: Thu Nov 9 07:23:47 EST 1995 |
518 | # Kenneth Albanowski <kjahds@kjahds.com> |
519 | # -added VMS support |
520 | # -added better error recognition (on no found pages, just exit. On |
521 | # missing nroff/pod2man, just display raw pod.) |
522 | # -added recursive/case-insensitive matching (thanks, Andreas). This |
523 | # slows things down a bit, unfortunately. Give a precise name, and |
524 | # it'll run faster. |
525 | # |
526 | # Version 1.01: Tue May 30 14:47:34 EDT 1995 |
527 | # Andy Dougherty <doughera@lafcol.lafayette.edu> |
528 | # -added pod documentation. |
529 | # -added PATH searching. |
530 | # -added searching pod/ subdirectory (mainly to pick up perlfunc.pod |
531 | # and friends. |
532 | # |
533 | # |
534 | # TODO: |
535 | # |
536 | # Cache directories read during sloppy match |
4633a7c4 |
537 | !NO!SUBS! |
538 | |
539 | close OUT or die "Can't close $file: $!"; |
540 | chmod 0755, $file or die "Can't reset permissions for $file: $!\n"; |
541 | exec("$Config{'eunicefix'} $file") if $Config{'eunicefix'} ne ':'; |