4 use File::Basename qw(&basename &dirname);
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
11 # to ensure Configure will look for $Config{startperl}.
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.
16 $file = basename($0, '.PL');
17 $file .= '.com' if $^O eq 'VMS';
19 open OUT,">$file" or die "Can't create $file: $!";
21 print "Extracting $file (with variable substitutions)\n";
23 # In this section, perl variables will be expanded during extraction.
24 # You can use $Config{...} to use Configure variables.
26 print OUT <<"!GROK!THIS!";
28 eval 'exec $Config{perlpath} -S \$0 \${1+"\$@"}'
29 if \$running_under_some_shell;
32 push \@pagers, "$Config{'pager'}" if -x "$Config{'pager'}";
35 # In the following, perl variables are not expanded during extraction.
37 print OUT <<'!NO!SUBS!';
40 # Perldoc revision #1 -- look up a piece of documentation in .pod format that
41 # is embedded in the perl installation tree.
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.
48 $me = $0; # Editing $0 is unportable
51 Usage: $me [-h] [-r] [-i] [-v] [-t] [-u] [-m] [-l] [-F] [-X] PageName|ModuleName|ProgramName
54 The -h option prints more help. Also try "perldoc perldoc" to get
55 aquainted with the system.
65 $Is_VMS = $^O eq 'VMS';
66 $Is_MSWin32 = $^O eq 'MSWin32';
67 $Is_Dos = $^O eq 'dos';
71 # Erase evidence of previous errors (if any), so exit status is simple.
74 perldoc [options] PageName|ModuleName|ProgramName...
75 perldoc [options] -f BuiltinFunction
78 -h Display this help message
79 -r Recursive search (slow)
81 -t Display pod using pod2text instead of pod2man and nroff
82 (-t is the default on win32)
83 -u Display unformatted pod text
84 -m Display modules file in its entirety
85 -l Display the modules file name
86 -F Arguments are file names, not modules
87 -v Verbosely describe what's going on
88 -X use index if present (looks for pod.idx at $Config{archlib})
90 PageName|ModuleName...
91 is the name of a piece of documentation that you want to look at. You
92 may either give a descriptive name of the page (as in the case of
93 `perlfunc') the name of a module, either like `Term::Info',
94 `Term/Info', the partial name of a module, like `info', or
95 `makemaker', or the name of a program, like `perldoc'.
98 is the name of a perl function. Will extract documentation from
101 Any switches in the PERLDOC environment variable will be used before the
102 command line arguments. The optional pod index file contains a list of
103 filenames, one per line.
108 use Text::ParseWords;
111 unshift(@ARGV,shellwords($ENV{"PERLDOC"}));
113 getopts("mhtluvriFf:X") || usage;
115 usage if $opt_h || $opt_h; # avoid -w warning
117 $podidx = "$Config{'archlib'}/pod.idx";
118 $podidx = "" if $opt_X || !-f "pod.idx" && !-r _ && -M _ > 7;
120 if ($opt_t + $opt_u + $opt_m + $opt_l > 1) {
121 usage("only one of -t, -u, -m or -l")
122 } elsif ($Is_MSWin32 || $Is_Dos) {
123 $opt_t = 1 unless $opt_t + $opt_u + $opt_m + $opt_l;
126 if ($opt_t) { require Pod::Text; import Pod::Text; }
129 @pages = ("perlfunc");
134 # Does this look like a module or extension directory?
135 if (-f "Makefile.PL") {
136 # Add ., lib and blib/* libs to @INC (if they exist)
138 unshift(@INC, 'lib') if -d 'lib';
139 require ExtUtils::testlib;
145 my($file, $readit) = @_;
146 return 1 if !$readit && $file =~ /\.pod$/i;
161 my $path = join('/',$dir,$file);
162 return $path if -f $path and -r _;
163 if (!$opt_i or $Is_VMS or $Is_MSWin32 or $Is_Dos or $^O eq 'os2') {
164 # on a case-forgiving file system or if case is important
165 # that is it all we can do
166 warn "Ignored $file: unreadable\n" if -f _;
173 foreach $p (split(/\//, $file)){
178 if ( $p eq $global_target) {
179 $tmp_path = join ('/', @p);
181 for (@global_found) {
182 $path_f = 1 if $_ eq $tmp_path;
184 push (@global_found, $tmp_path) unless $path_f;
185 print STDERR "Found as @p but directory\n" if $opt_v;
187 } elsif (-f _ && -r _) {
190 warn "Ignored $try: unreadable\n";
195 while ($cip=readdir(DIR)) {
196 if (lc $cip eq $lcp){
202 return "" unless $found;
204 return "@p" if -f "@p" and -r _;
205 warn "Ignored $file: unreadable\n" if -f _;
215 return minus_f_nocase($dir,$file);
217 my $path = minus_f_nocase($dir,$file);
218 return $path if containspod($path);
225 my($recurse,$s,@dirs) = @_;
227 $s = VMS::Filespec::unixify($s) if $Is_VMS;
228 return $s if -f $s && containspod($s);
229 printf STDERR "Looking for $s in @dirs\n" if $opt_v;
233 $global_target = (split('/', $s))[-1];
234 for ($i=0; $i<@dirs; $i++) {
236 ($dir = VMS::Filespec::unixpath($dir)) =~ s!/$!! if $Is_VMS;
237 if ( ( $ret = check_file $dir,"$s.pod")
238 or ( $ret = check_file $dir,"$s.pm")
239 or ( $ret = check_file $dir,$s)
241 $ret = check_file $dir,"$s.com")
242 or ( $^O eq 'os2' and
243 $ret = check_file $dir,"$s.cmd")
244 or ( ($Is_MSWin32 or $Is_Dos or $^O eq 'os2') and
245 $ret = check_file $dir,"$s.bat")
246 or ( $ret = check_file "$dir/pod","$s.pod")
247 or ( $ret = check_file "$dir/pod",$s)
254 my @newdirs = map "$dir/$_", grep {
256 not /^auto$/ and # save time! don't search auto dirs
260 next unless @newdirs;
261 @newdirs = map((s/.dir$//,$_)[1],@newdirs) if $Is_VMS;
262 print STDERR "Also looking in @newdirs\n" if $opt_v;
263 push(@dirs,@newdirs);
271 if ($podidx && open(PODIDX, $podidx)) {
274 $searchfor =~ s,::,/,g;
275 print STDERR "Searching for '$searchfor' in $podidx\n" if $opt_v;
278 push(@found, $_) if m,/$searchfor(?:\.(?:pod|pm))?$,i;
283 print STDERR "Searching for $_\n" if $opt_v;
284 # We must look both in @INC for library modules and in PATH
285 # for executables, like h2xs or perldoc itself.
289 push @found, $_ if $opt_m or containspod($_);
295 for ($i = 0; $trn = $ENV{'DCL$PATH'.$i}; $i++) {
296 push(@searchdirs,$trn);
298 push(@dirs,'perl_root:[lib.pod]') # installed pods
300 push(@searchdirs, grep(-d, split($Config{path_sep},
303 @files= searchfor(0,$_,@searchdirs);
306 print STDERR "Found as @files\n" if $opt_v;
308 # no match, try recursive search
310 @searchdirs = grep(!/^\.$/,@INC);
312 @files= searchfor(1,$_,@searchdirs) if $opt_r;
314 print STDERR "Loosely found as @files\n" if $opt_v;
316 print STDERR "No documentation found for \"$_\".\n";
318 print STDERR "However, try\n";
319 my $dir = $file = "";
320 for $dir (@global_found) {
321 opendir(DIR, $dir) or die "$!";
322 while ($file = readdir(DIR)) {
323 next if ($file =~ /^\./);
324 $file =~ s/\.(pm|pod)$//;
325 print STDERR "\tperldoc $_\::$file\n";
336 exit ($Is_VMS ? 98962 : 1);
340 print join("\n", @found), "\n";
344 if( ! -t STDOUT ) { $no_tty = 1 }
347 $tmp = "$ENV{TEMP}\\perldoc1.$$";
348 push @pagers, qw( more< less notepad );
349 unshift @pagers, $ENV{PAGER} if $ENV{PAGER};
351 $tmp = 'Sys$Scratch:perldoc.tmp1_'.$$;
352 push @pagers, qw( most more less type/page );
354 $tmp = "$ENV{TEMP}/perldoc1.$$";
356 push @pagers, qw( less.exe more.com< );
357 unshift @pagers, $ENV{PAGER} if $ENV{PAGER};
361 $tmp = POSIX::tmpnam();
363 $tmp = "/tmp/perldoc1.$$";
365 push @pagers, qw( more less pg view cat );
366 unshift @pagers, $ENV{PAGER} if $ENV{PAGER};
368 unshift @pagers, $ENV{PERLDOC_PAGER} if $ENV{PERLDOC_PAGER};
371 foreach $pager (@pagers) {
372 system("$pager @found") or exit;
374 if ($Is_VMS) { eval 'use vmsish qw(status exit); exit $?' }
379 my $perlfunc = shift @found;
380 open(PFUNC, $perlfunc) or die "Can't open $perlfunc: $!";
384 last if /^=head2 Alphabetical Listing of Perl Functions/;
387 # Look for our function
391 if (/^=item\s+\Q$opt_f\E\b/o) {
398 ++$found if /^\w/; # found descriptive text
402 open(FORMATTER, "| pod2text") || die "Can't start filter";
403 print FORMATTER "=over 8\n\n";
404 print FORMATTER @pod;
405 print FORMATTER "=back\n";
411 die "No documentation for perl function `$opt_f' found\n";
420 Pod::Text::pod2text($_,*TMP);
422 } elsif(not $opt_u) {
423 my $cmd = "pod2man --lax $_ | nroff -man";
424 $cmd .= " | col -x" if $^O =~ /hpux/;
426 unless(($err = $?)) {
433 if( $opt_u or $err or -z $tmp) {
438 $cut = $1 eq 'cut' if /^=(\w+)/;
452 foreach $pager (@pagers) {
453 system("$pager $tmp") or last;
457 1 while unlink($tmp); #Possibly pointless VMSism
465 perldoc - Look up Perl documentation in pod format.
469 B<perldoc> [B<-h>] [B<-v>] [B<-t>] [B<-u>] [B<-m>] [B<-l>] [B<-F>] [B<-X>] PageName|ModuleName|ProgramName
471 B<perldoc> B<-f> BuiltinFunction
475 I<perldoc> looks up a piece of documentation in .pod format that is embedded
476 in the perl installation tree or in a perl script, and displays it via
477 C<pod2man | nroff -man | $PAGER>. (In addition, if running under HP-UX,
478 C<col -x> will be used.) This is primarily used for the documentation for
479 the perl library modules.
481 Your system may also have man pages installed for those modules, in
482 which case you can probably just use the man(1) command.
490 Prints out a brief help message.
494 Describes search for the item in detail.
496 =item B<-t> text output
498 Display docs using plain text converter, instead of nroff. This may be faster,
499 but it won't look as nice.
501 =item B<-u> unformatted
503 Find docs only; skip reformatting by pod2*
507 Display the entire module: both code and unformatted pod documentation.
508 This may be useful if the docs don't explain a function in the detail
509 you need, and you'd like to inspect the code directly; perldoc will find
510 the file for you and simply hand it off for display.
512 =item B<-l> file name only
514 Display the file name of the module found.
516 =item B<-F> file names
518 Consider arguments as file names, no search in directories will be performed.
522 The B<-f> option followed by the name of a perl built in function will
523 extract the documentation of this function from L<perlfunc>.
525 =item B<-X> use an index if present
527 The B<-X> option looks for a entry whose basename matches the name given on the
528 command line in the file C<$Config{archlib}/pod.idx>. The pod.idx file should
529 contain fully qualified filenames, one per line.
531 =item B<PageName|ModuleName|ProgramName>
533 The item you want to look up. Nested modules (such as C<File::Basename>)
534 are specified either as C<File::Basename> or C<File/Basename>. You may also
535 give a descriptive name of a page, such as C<perlfunc>. You make also give a
536 partial or wrong-case name, such as "basename" for "File::Basename", but
537 this will be slower, if there is more then one page with the same partial
538 name, you will only get the first one.
544 Any switches in the C<PERLDOC> environment variable will be used before the
545 command line arguments. C<perldoc> also searches directories
546 specified by the C<PERL5LIB> (or C<PERLLIB> if C<PERL5LIB> is not
547 defined) and C<PATH> environment variables.
548 (The latter is so that embedded pods for executables, such as
549 C<perldoc> itself, are available.)
553 Kenneth Albanowski <kjahds@kjahds.com>
555 Minor updates by Andy Dougherty <doughera@lafcol.lafayette.edu>
560 # Version 1.13: Fri Feb 27 16:20:50 EST 1997
561 # Gurusamy Sarathy <gsar@umich.edu>
562 # -doc tweaks for -F and -X options
563 # Version 1.12: Sat Apr 12 22:41:09 EST 1997
564 # Gurusamy Sarathy <gsar@umich.edu>
565 # -various fixes for win32
566 # Version 1.11: Tue Dec 26 09:54:33 EST 1995
567 # Kenneth Albanowski <kjahds@kjahds.com>
568 # -added Charles Bailey's further VMS patches, and -u switch
569 # -added -t switch, with pod2text support
571 # Version 1.10: Thu Nov 9 07:23:47 EST 1995
572 # Kenneth Albanowski <kjahds@kjahds.com>
574 # -added better error recognition (on no found pages, just exit. On
575 # missing nroff/pod2man, just display raw pod.)
576 # -added recursive/case-insensitive matching (thanks, Andreas). This
577 # slows things down a bit, unfortunately. Give a precise name, and
580 # Version 1.01: Tue May 30 14:47:34 EDT 1995
581 # Andy Dougherty <doughera@lafcol.lafayette.edu>
582 # -added pod documentation.
583 # -added PATH searching.
584 # -added searching pod/ subdirectory (mainly to pick up perlfunc.pod
590 # Cache directories read during sloppy match
593 close OUT or die "Can't close $file: $!";
594 chmod 0755, $file or die "Can't reset permissions for $file: $!\n";
595 exec("$Config{'eunicefix'} $file") if $Config{'eunicefix'} ne ':';