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)){
179 if ( $p eq $global_target) {
180 $tmp_path = join ('/', @p);
182 for (@global_found) {
183 $path_f = 1 if $_ eq $tmp_path;
185 push (@global_found, $tmp_path) unless $path_f;
186 print STDERR "Found as @p but directory\n" if $opt_v;
188 } elsif (-f _ && -r _) {
191 warn "Ignored $try: unreadable\n";
196 while ($cip=readdir(DIR)) {
197 if (lc $cip eq $lcp){
203 return "" unless $found;
205 return "@p" if -f "@p" and -r _;
206 warn "Ignored $file: unreadable\n" if -f _;
216 return minus_f_nocase($dir,$file);
218 my $path = minus_f_nocase($dir,$file);
219 return $path if containspod($path);
226 my($recurse,$s,@dirs) = @_;
228 $s = VMS::Filespec::unixify($s) if $Is_VMS;
229 return $s if -f $s && containspod($s);
230 printf STDERR "Looking for $s in @dirs\n" if $opt_v;
234 $global_target = (split('/', $s))[-1];
235 for ($i=0; $i<@dirs; $i++) {
237 ($dir = VMS::Filespec::unixpath($dir)) =~ s!/$!! if $Is_VMS;
238 if ( ( $ret = check_file $dir,"$s.pod")
239 or ( $ret = check_file $dir,"$s.pm")
240 or ( $ret = check_file $dir,$s)
242 $ret = check_file $dir,"$s.com")
243 or ( $^O eq 'os2' and
244 $ret = check_file $dir,"$s.cmd")
245 or ( ($Is_MSWin32 or $Is_Dos or $^O eq 'os2') and
246 $ret = check_file $dir,"$s.bat")
247 or ( $ret = check_file "$dir/pod","$s.pod")
248 or ( $ret = check_file "$dir/pod",$s)
255 my @newdirs = map "$dir/$_", grep {
257 not /^auto$/ and # save time! don't search auto dirs
261 next unless @newdirs;
262 @newdirs = map((s/.dir$//,$_)[1],@newdirs) if $Is_VMS;
263 print STDERR "Also looking in @newdirs\n" if $opt_v;
264 push(@dirs,@newdirs);
272 if ($podidx && open(PODIDX, $podidx)) {
275 $searchfor =~ s,::,/,g;
276 print STDERR "Searching for '$searchfor' in $podidx\n" if $opt_v;
279 push(@found, $_) if m,/$searchfor(?:\.(?:pod|pm))?$,i;
284 print STDERR "Searching for $_\n" if $opt_v;
285 # We must look both in @INC for library modules and in PATH
286 # for executables, like h2xs or perldoc itself.
290 push @found, $_ if $opt_m or containspod($_);
296 for ($i = 0; $trn = $ENV{'DCL$PATH'.$i}; $i++) {
297 push(@searchdirs,$trn);
299 push(@dirs,'perl_root:[lib.pod]') # installed pods
301 push(@searchdirs, grep(-d, split($Config{path_sep},
304 @files= searchfor(0,$_,@searchdirs);
307 print STDERR "Found as @files\n" if $opt_v;
309 # no match, try recursive search
311 @searchdirs = grep(!/^\.$/,@INC);
313 @files= searchfor(1,$_,@searchdirs) if $opt_r;
315 print STDERR "Loosely found as @files\n" if $opt_v;
317 print STDERR "No documentation found for \"$_\".\n";
319 print STDERR "However, try\n";
320 my $dir = $file = "";
321 for $dir (@global_found) {
322 opendir(DIR, $dir) or die "$!";
323 while ($file = readdir(DIR)) {
324 next if ($file =~ /^\./);
325 $file =~ s/\.(pm|pod)$//;
326 print STDERR "\tperldoc $_\::$file\n";
337 exit ($Is_VMS ? 98962 : 1);
341 print join("\n", @found), "\n";
345 if( ! -t STDOUT ) { $no_tty = 1 }
348 $tmp = "$ENV{TEMP}\\perldoc1.$$";
349 push @pagers, qw( more< less notepad );
350 unshift @pagers, $ENV{PAGER} if $ENV{PAGER};
352 $tmp = 'Sys$Scratch:perldoc.tmp1_'.$$;
353 push @pagers, qw( most more less type/page );
355 $tmp = "$ENV{TEMP}/perldoc1.$$";
357 push @pagers, qw( less.exe more.com< );
358 unshift @pagers, $ENV{PAGER} if $ENV{PAGER};
362 $tmp = POSIX::tmpnam();
364 $tmp = "/tmp/perldoc1.$$";
366 push @pagers, qw( more less pg view cat );
367 unshift @pagers, $ENV{PAGER} if $ENV{PAGER};
369 unshift @pagers, $ENV{PERLDOC_PAGER} if $ENV{PERLDOC_PAGER};
372 foreach $pager (@pagers) {
373 system("$pager @found") or exit;
375 if ($Is_VMS) { eval 'use vmsish qw(status exit); exit $?' }
380 my $perlfunc = shift @found;
381 open(PFUNC, $perlfunc) or die "Can't open $perlfunc: $!";
385 last if /^=head2 Alphabetical Listing of Perl Functions/;
388 # Look for our function
392 if (/^=item\s+\Q$opt_f\E\b/o) {
399 ++$found if /^\w/; # found descriptive text
403 open(FORMATTER, "| pod2text") || die "Can't start filter";
404 print FORMATTER "=over 8\n\n";
405 print FORMATTER @pod;
406 print FORMATTER "=back\n";
412 die "No documentation for perl function `$opt_f' found\n";
421 Pod::Text::pod2text($_,*TMP);
423 } elsif(not $opt_u) {
424 my $cmd = "pod2man --lax $_ | nroff -man";
425 $cmd .= " | col -x" if $^O =~ /hpux/;
427 unless(($err = $?)) {
434 if( $opt_u or $err or -z $tmp) {
439 $cut = $1 eq 'cut' if /^=(\w+)/;
453 foreach $pager (@pagers) {
454 system("$pager $tmp") or last;
458 1 while unlink($tmp); #Possibly pointless VMSism
466 perldoc - Look up Perl documentation in pod format.
470 B<perldoc> [B<-h>] [B<-v>] [B<-t>] [B<-u>] [B<-m>] [B<-l>] [B<-F>] [B<-X>] PageName|ModuleName|ProgramName
472 B<perldoc> B<-f> BuiltinFunction
476 I<perldoc> looks up a piece of documentation in .pod format that is embedded
477 in the perl installation tree or in a perl script, and displays it via
478 C<pod2man | nroff -man | $PAGER>. (In addition, if running under HP-UX,
479 C<col -x> will be used.) This is primarily used for the documentation for
480 the perl library modules.
482 Your system may also have man pages installed for those modules, in
483 which case you can probably just use the man(1) command.
491 Prints out a brief help message.
495 Describes search for the item in detail.
497 =item B<-t> text output
499 Display docs using plain text converter, instead of nroff. This may be faster,
500 but it won't look as nice.
502 =item B<-u> unformatted
504 Find docs only; skip reformatting by pod2*
508 Display the entire module: both code and unformatted pod documentation.
509 This may be useful if the docs don't explain a function in the detail
510 you need, and you'd like to inspect the code directly; perldoc will find
511 the file for you and simply hand it off for display.
513 =item B<-l> file name only
515 Display the file name of the module found.
517 =item B<-F> file names
519 Consider arguments as file names, no search in directories will be performed.
523 The B<-f> option followed by the name of a perl built in function will
524 extract the documentation of this function from L<perlfunc>.
526 =item B<-X> use an index if present
528 The B<-X> option looks for a entry whose basename matches the name given on the
529 command line in the file C<$Config{archlib}/pod.idx>. The pod.idx file should
530 contain fully qualified filenames, one per line.
532 =item B<PageName|ModuleName|ProgramName>
534 The item you want to look up. Nested modules (such as C<File::Basename>)
535 are specified either as C<File::Basename> or C<File/Basename>. You may also
536 give a descriptive name of a page, such as C<perlfunc>. You make also give a
537 partial or wrong-case name, such as "basename" for "File::Basename", but
538 this will be slower, if there is more then one page with the same partial
539 name, you will only get the first one.
545 Any switches in the C<PERLDOC> environment variable will be used before the
546 command line arguments. C<perldoc> also searches directories
547 specified by the C<PERL5LIB> (or C<PERLLIB> if C<PERL5LIB> is not
548 defined) and C<PATH> environment variables.
549 (The latter is so that embedded pods for executables, such as
550 C<perldoc> itself, are available.)
554 Kenneth Albanowski <kjahds@kjahds.com>
556 Minor updates by Andy Dougherty <doughera@lafcol.lafayette.edu>
561 # Version 1.13: Fri Feb 27 16:20:50 EST 1997
562 # Gurusamy Sarathy <gsar@umich.edu>
563 # -doc tweaks for -F and -X options
564 # Version 1.12: Sat Apr 12 22:41:09 EST 1997
565 # Gurusamy Sarathy <gsar@umich.edu>
566 # -various fixes for win32
567 # Version 1.11: Tue Dec 26 09:54:33 EST 1995
568 # Kenneth Albanowski <kjahds@kjahds.com>
569 # -added Charles Bailey's further VMS patches, and -u switch
570 # -added -t switch, with pod2text support
572 # Version 1.10: Thu Nov 9 07:23:47 EST 1995
573 # Kenneth Albanowski <kjahds@kjahds.com>
575 # -added better error recognition (on no found pages, just exit. On
576 # missing nroff/pod2man, just display raw pod.)
577 # -added recursive/case-insensitive matching (thanks, Andreas). This
578 # slows things down a bit, unfortunately. Give a precise name, and
581 # Version 1.01: Tue May 30 14:47:34 EDT 1995
582 # Andy Dougherty <doughera@lafcol.lafayette.edu>
583 # -added pod documentation.
584 # -added PATH searching.
585 # -added searching pod/ subdirectory (mainly to pick up perlfunc.pod
591 # Cache directories read during sloppy match
594 close OUT or die "Can't close $file: $!";
595 chmod 0755, $file or die "Can't reset permissions for $file: $!\n";
596 exec("$Config{'eunicefix'} $file") if $Config{'eunicefix'} ne ':';