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.
50 Usage: $0 [-h] [-v] [-t] [-u] [-m] [-l] PageName|ModuleName|ProgramName
53 We suggest you use "perldoc perldoc" to get aquainted
59 $Is_VMS = $^O eq 'VMS';
60 $Is_MSWin32 = $^O eq 'MSWin32';
64 # Erase evidence of previous errors (if any), so exit status is simple.
67 perldoc [options] PageName|ModuleName|ProgramName...
68 perldoc [options] -f BuiltinFunction
71 -h Display this help message
72 -t Display pod using pod2text instead of pod2man and nroff
73 (-t is the default on win32)
74 -u Display unformatted pod text
75 -m Display modules file in its entirety
76 -l Display the modules file name
77 -v Verbosely describe what's going on
79 PageName|ModuleName...
80 is the name of a piece of documentation that you want to look at. You
81 may either give a descriptive name of the page (as in the case of
82 `perlfunc') the name of a module, either like `Term::Info',
83 `Term/Info', the partial name of a module, like `info', or
84 `makemaker', or the name of a program, like `perldoc'.
87 is the name of a perl function. Will extract documentation from
90 Any switches in the PERLDOC environment variable will be used before the
91 command line arguments.
99 unshift(@ARGV,shellwords($ENV{"PERLDOC"}));
101 getopts("mhtluvf:") || usage;
103 usage if $opt_h || $opt_h; # avoid -w warning
105 if ($opt_t + $opt_u + $opt_m + $opt_l > 1) {
106 usage("only one of -t, -u, -m or -l")
107 } elsif ($Is_MSWin32) {
108 $opt_t = 1 unless $opt_t + $opt_u + $opt_m + $opt_l;
111 if ($opt_t) { require Pod::Text; import Pod::Text; }
114 @pages = ("perlfunc");
140 $file =~ tr|\\|/| if $Is_MSWin32 or $^O eq 'os2';
141 if ( $Is_MSWin32 and $file =~ s|^(//[^/]+)/|| ) { # UNC path?
144 foreach $p (split(/\//, $file)){
145 if (($Is_VMS or $Is_MSWin32 or $^O eq 'os2') and not scalar @p) {
146 # VMSish filesystems don't begin at '/'
152 } elsif (-f ("@p/$p")) {
158 while ($cip=readdir(DIR)) {
159 $cip =~ s/\.dir$// if $Is_VMS;
160 if (lc $cip eq $lcp){
166 return "" unless $found;
168 return "@p" if -f "@p";
171 return; # is not a file
175 my($recurse,$s,@dirs) = @_;
177 $s = VMS::Filespec::unixify($s) if $Is_VMS;
178 return $s if -f $s && containspod($s);
179 printf STDERR "looking for $s in @dirs\n" if $opt_v;
183 for ($i=0;$i<@dirs;$i++) {
185 ($dir = VMS::Filespec::unixpath($dir)) =~ s!/$!! if $Is_VMS;
186 if (( $ret = minus_f_nocase "$dir/$s.pod")
187 or ( $ret = minus_f_nocase "$dir/$s.pm" and containspod($ret))
188 or ( $ret = minus_f_nocase "$dir/$s" and containspod($ret))
190 $ret = minus_f_nocase "$dir/$s.com" and containspod($ret))
192 $ret = minus_f_nocase "$dir/$s.bat" and containspod($ret))
193 or ( $ret = minus_f_nocase "$dir/pod/$s.pod")
194 or ( $ret = minus_f_nocase "$dir/pod/$s" and containspod($ret)))
199 my(@newdirs) = grep(-d,map("$dir/$_",grep(!/^\.\.?$/,readdir(D))));
201 @newdirs = map((s/.dir$//,$_)[1],@newdirs) if $Is_VMS;
202 next unless @newdirs;
203 print STDERR "Also looking in @newdirs\n" if $opt_v;
204 push(@dirs,@newdirs);
212 print STDERR "Searching for $_\n" if $opt_v;
213 # We must look both in @INC for library modules and in PATH
214 # for executables, like h2xs or perldoc itself.
219 for ($i = 0; $trn = $ENV{'DCL$PATH'.$i}; $i++) {
220 push(@searchdirs,$trn);
222 } elsif ($Is_MSWin32) {
223 push(@searchdirs, grep(-d, split(';', $ENV{'PATH'})));
225 push(@searchdirs, grep(-d, split(':', $ENV{'PATH'})));
227 @files= searchfor(0,$_,@searchdirs);
230 print STDERR "Found as @files\n" if $opt_v;
232 # no match, try recursive search
234 @searchdirs = grep(!/^\.$/,@INC);
237 @files= searchfor(1,$_,@searchdirs);
239 print STDERR "Loosely found as @files\n" if $opt_v;
241 print STDERR "No documentation found for '$_'\n";
248 exit ($Is_VMS ? 98962 : 1);
252 print join("\n", @found), "\n";
256 if( ! -t STDOUT ) { $no_tty = 1 }
259 $tmp = "$ENV{TEMP}\\perldoc1.$$";
260 push @pagers, qw( more< less notepad );
261 unshift @pagers, $ENV{PAGER} if $ENV{PAGER};
263 $tmp = 'Sys$Scratch:perldoc.tmp1_'.$$;
264 push @pagers, qw( most more less type/page );
266 $tmp = "/tmp/perldoc1.$$";
267 push @pagers, qw( more less pg view cat );
268 unshift @pagers, $ENV{PAGER} if $ENV{PAGER};
270 unshift @pagers, $ENV{PERLDOC_PAGER} if $ENV{PERLDOC_PAGER};
273 foreach $pager (@pagers) {
274 system("$pager @found") or exit;
276 if ($Is_VMS) { eval 'use vmsish qw(status exit); exit $?' }
281 my $perlfunc = shift @found;
282 open(PFUNC, $perlfunc) or die "Can't open $perlfunc: $!";
286 last if /^=head2 Alphabetical Listing of Perl Functions/;
289 # Look for our function
292 if (/^=item\s+\Q$opt_f\E\b/o) {
297 push(@pod, $_) if $found;
301 open(FORMATTER, "| pod2text") || die "Can't start filter";
302 print FORMATTER "=over 8\n\n";
303 print FORMATTER @pod;
304 print FORMATTER "=back\n";
310 die "No documentation for perl function `$opt_f' found\n";
319 Pod::Text::pod2text($_,*TMP);
321 } elsif(not $opt_u) {
322 my $cmd = "pod2man --lax $_ | nroff -man";
323 $cmd .= " | col -x" if $^O =~ /hpux/;
325 unless(($err = $?)) {
332 if( $opt_u or $err or -z $tmp) {
337 $cut = $1 eq 'cut' if /^=(\w+)/;
351 foreach $pager (@pagers) {
352 system("$pager $tmp") or last;
356 1 while unlink($tmp); #Possibly pointless VMSism
364 perldoc - Look up Perl documentation in pod format.
368 B<perldoc> [B<-h>] [B<-v>] [B<-t>] [B<-u>] [B<-m>] [B<-l>] PageName|ModuleName|ProgramName
370 B<perldoc> B<-f> BuiltinFunction
374 I<perldoc> looks up a piece of documentation in .pod format that is embedded
375 in the perl installation tree or in a perl script, and displays it via
376 C<pod2man | nroff -man | $PAGER>. (In addition, if running under HP-UX,
377 C<col -x> will be used.) This is primarily used for the documentation for
378 the perl library modules.
380 Your system may also have man pages installed for those modules, in
381 which case you can probably just use the man(1) command.
389 Prints out a brief help message.
393 Describes search for the item in detail.
395 =item B<-t> text output
397 Display docs using plain text converter, instead of nroff. This may be faster,
398 but it won't look as nice.
400 =item B<-u> unformatted
402 Find docs only; skip reformatting by pod2*
406 Display the entire module: both code and unformatted pod documentation.
407 This may be useful if the docs don't explain a function in the detail
408 you need, and you'd like to inspect the code directly; perldoc will find
409 the file for you and simply hand it off for display.
411 =item B<-l> file name only
413 Display the file name of the module found.
417 The B<-f> option followed by the name of a perl built in function will
418 extract the documentation of this function from L<perlfunc>.
420 =item B<PageName|ModuleName|ProgramName>
422 The item you want to look up. Nested modules (such as C<File::Basename>)
423 are specified either as C<File::Basename> or C<File/Basename>. You may also
424 give a descriptive name of a page, such as C<perlfunc>. You make also give a
425 partial or wrong-case name, such as "basename" for "File::Basename", but
426 this will be slower, if there is more then one page with the same partial
427 name, you will only get the first one.
433 Any switches in the C<PERLDOC> environment variable will be used before the
434 command line arguments. C<perldoc> also searches directories
435 specified by the C<PERL5LIB> (or C<PERLLIB> if C<PERL5LIB> is not
436 defined) and C<PATH> environment variables.
437 (The latter is so that embedded pods for executables, such as
438 C<perldoc> itself, are available.)
442 Kenneth Albanowski <kjahds@kjahds.com>
444 Minor updates by Andy Dougherty <doughera@lafcol.lafayette.edu>
449 # Version 1.12: Sat Apr 12 22:41:09 EST 1997
450 # Gurusamy Sarathy <gsar@umich.edu>
451 # -various fixes for win32
452 # Version 1.11: Tue Dec 26 09:54:33 EST 1995
453 # Kenneth Albanowski <kjahds@kjahds.com>
454 # -added Charles Bailey's further VMS patches, and -u switch
455 # -added -t switch, with pod2text support
457 # Version 1.10: Thu Nov 9 07:23:47 EST 1995
458 # Kenneth Albanowski <kjahds@kjahds.com>
460 # -added better error recognition (on no found pages, just exit. On
461 # missing nroff/pod2man, just display raw pod.)
462 # -added recursive/case-insensitive matching (thanks, Andreas). This
463 # slows things down a bit, unfortunately. Give a precise name, and
466 # Version 1.01: Tue May 30 14:47:34 EDT 1995
467 # Andy Dougherty <doughera@lafcol.lafayette.edu>
468 # -added pod documentation.
469 # -added PATH searching.
470 # -added searching pod/ subdirectory (mainly to pick up perlfunc.pod
476 # Cache directories read during sloppy match
479 close OUT or die "Can't close $file: $!";
480 chmod 0755, $file or die "Can't reset permissions for $file: $!\n";
481 exec("$Config{'eunicefix'} $file") if $Config{'eunicefix'} ne ':';