688 lines
17 KiB
Plaintext
688 lines
17 KiB
Plaintext
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#!/usr/local/bin/perl
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use Config;
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use File::Basename qw(&basename &dirname);
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use Cwd;
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# List explicitly here the variables you want Configure to
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# generate. Metaconfig only looks for shell variables, so you
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# have to mention them as if they were shell variables, not
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# %Config entries. Thus you write
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# $startperl
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# to ensure Configure will look for $Config{startperl}.
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# This forces PL files to create target in same directory as PL file.
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# This is so that make depend always knows where to find PL derivatives.
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$origdir = cwd;
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chdir dirname($0);
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$file = basename($0, '.PL');
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$file .= '.com' if $^O eq 'VMS';
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open OUT,">$file" or die "Can't create $file: $!";
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print "Extracting $file (with variable substitutions)\n";
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# In this section, perl variables will be expanded during extraction.
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# You can use $Config{...} to use Configure variables.
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print OUT <<"!GROK!THIS!";
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$Config{startperl}
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eval 'exec $Config{perlpath} -S \$0 \${1+"\$@"}'
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if 0;
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use strict;
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my \@pagers = ();
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push \@pagers, "$Config{'pager'}" if -x "$Config{'pager'}";
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!GROK!THIS!
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# In the following, perl variables are not expanded during extraction.
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print OUT <<'!NO!SUBS!';
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#
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# Perldoc revision #1 -- look up a piece of documentation in .pod format that
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# is embedded in the perl installation tree.
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#
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# This is not to be confused with Tom Christianson's perlman, which is a
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# man replacement, written in perl. This perldoc is strictly for reading
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# the perl manuals, though it too is written in perl.
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if(@ARGV<1) {
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my $me = $0; # Editing $0 is unportable
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$me =~ s,.*/,,;
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die <<EOF;
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Usage: $me [-h] [-r] [-i] [-v] [-t] [-u] [-m] [-l] [-F] [-X] PageName|ModuleName|ProgramName
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$me -f PerlFunc
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$me -q FAQKeywords
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The -h option prints more help. Also try "perldoc perldoc" to get
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aquainted with the system.
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EOF
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}
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use Getopt::Std;
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use Config '%Config';
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my @global_found = ();
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my $global_target = "";
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my $Is_VMS = $^O eq 'VMS';
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my $Is_MSWin32 = $^O eq 'MSWin32';
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my $Is_Dos = $^O eq 'dos';
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sub usage{
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warn "@_\n" if @_;
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# Erase evidence of previous errors (if any), so exit status is simple.
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$! = 0;
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die <<EOF;
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perldoc [options] PageName|ModuleName|ProgramName...
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perldoc [options] -f BuiltinFunction
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perldoc [options] -q FAQRegex
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Options:
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-h Display this help message
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-r Recursive search (slow)
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-i Ignore case
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-t Display pod using pod2text instead of pod2man and nroff
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(-t is the default on win32)
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-u Display unformatted pod text
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-m Display module's file in its entirety
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-l Display the module's file name
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-F Arguments are file names, not modules
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-v Verbosely describe what's going on
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-X use index if present (looks for pod.idx at $Config{archlib})
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PageName|ModuleName...
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is the name of a piece of documentation that you want to look at. You
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may either give a descriptive name of the page (as in the case of
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`perlfunc') the name of a module, either like `Term::Info',
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`Term/Info', the partial name of a module, like `info', or
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`makemaker', or the name of a program, like `perldoc'.
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BuiltinFunction
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is the name of a perl function. Will extract documentation from
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`perlfunc'.
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FAQRegex
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is a regex. Will search perlfaq[1-9] for and extract any
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questions that match.
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Any switches in the PERLDOC environment variable will be used before the
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command line arguments. The optional pod index file contains a list of
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filenames, one per line.
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EOF
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}
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if( defined $ENV{"PERLDOC"} ) {
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require Text::ParseWords;
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unshift(@ARGV, Text::ParseWords::shellwords($ENV{"PERLDOC"}));
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}
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!NO!SUBS!
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my $getopts = "mhtluvriFf:Xq:";
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print OUT <<"!GET!OPTS!";
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use vars qw( @{[map "\$opt_$_", ($getopts =~ /\w/g)]} );
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getopts("$getopts") || usage;
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!GET!OPTS!
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print OUT <<'!NO!SUBS!';
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usage if $opt_h;
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my $podidx;
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if( $opt_X ) {
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$podidx = "$Config{'archlib'}/pod.idx";
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$podidx = "" unless -f $podidx && -r _ && -M _ <= 7;
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}
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if( (my $opts = do{ local $^W; $opt_t + $opt_u + $opt_m + $opt_l }) > 1) {
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usage("only one of -t, -u, -m or -l")
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} elsif ($Is_MSWin32 || $Is_Dos) {
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$opt_t = 1 unless $opts
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}
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if ($opt_t) { require Pod::Text; import Pod::Text; }
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my @pages;
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if ($opt_f) {
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@pages = ("perlfunc");
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} elsif ($opt_q) {
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@pages = ("perlfaq1" .. "perlfaq9");
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} else {
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@pages = @ARGV;
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}
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# Does this look like a module or extension directory?
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if (-f "Makefile.PL") {
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# Add ., lib and blib/* libs to @INC (if they exist)
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unshift(@INC, '.');
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unshift(@INC, 'lib') if -d 'lib';
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require ExtUtils::testlib;
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}
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sub containspod {
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my($file, $readit) = @_;
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return 1 if !$readit && $file =~ /\.pod$/i;
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local($_);
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open(TEST,"<$file");
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while(<TEST>) {
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if(/^=head/) {
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close(TEST);
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return 1;
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}
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}
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close(TEST);
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return 0;
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}
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sub minus_f_nocase {
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my($dir,$file) = @_;
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my $path = join('/',$dir,$file);
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return $path if -f $path and -r _;
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if (!$opt_i or $Is_VMS or $Is_MSWin32 or $Is_Dos or $^O eq 'os2') {
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# on a case-forgiving file system or if case is important
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# that is it all we can do
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warn "Ignored $file: unreadable\n" if -f _;
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return '';
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}
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local *DIR;
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local($")="/";
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my @p = ($dir);
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my($p,$cip);
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foreach $p (split(/\//, $file)){
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my $try = "@p/$p";
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stat $try;
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if (-d _){
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push @p, $p;
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if ( $p eq $global_target) {
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my $tmp_path = join ('/', @p);
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my $path_f = 0;
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for (@global_found) {
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$path_f = 1 if $_ eq $tmp_path;
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}
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push (@global_found, $tmp_path) unless $path_f;
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print STDERR "Found as @p but directory\n" if $opt_v;
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}
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} elsif (-f _ && -r _) {
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return $try;
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} elsif (-f _) {
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warn "Ignored $try: unreadable\n";
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} else {
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my $found=0;
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my $lcp = lc $p;
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opendir DIR, "@p";
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while ($cip=readdir(DIR)) {
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if (lc $cip eq $lcp){
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$found++;
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last;
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}
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}
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closedir DIR;
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return "" unless $found;
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push @p, $cip;
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return "@p" if -f "@p" and -r _;
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warn "Ignored $file: unreadable\n" if -f _;
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}
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}
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return "";
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}
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sub check_file {
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my($dir,$file) = @_;
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if ($opt_m) {
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return minus_f_nocase($dir,$file);
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} else {
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my $path = minus_f_nocase($dir,$file);
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return $path if length $path and containspod($path);
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}
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return "";
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}
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sub searchfor {
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my($recurse,$s,@dirs) = @_;
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$s =~ s!::!/!g;
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$s = VMS::Filespec::unixify($s) if $Is_VMS;
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return $s if -f $s && containspod($s);
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printf STDERR "Looking for $s in @dirs\n" if $opt_v;
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my $ret;
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my $i;
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my $dir;
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$global_target = (split('/', $s))[-1];
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for ($i=0; $i<@dirs; $i++) {
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$dir = $dirs[$i];
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($dir = VMS::Filespec::unixpath($dir)) =~ s!/$!! if $Is_VMS;
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if ( ( $ret = check_file $dir,"$s.pod")
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or ( $ret = check_file $dir,"$s.pm")
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or ( $ret = check_file $dir,$s)
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or ( $Is_VMS and
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$ret = check_file $dir,"$s.com")
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or ( $^O eq 'os2' and
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$ret = check_file $dir,"$s.cmd")
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or ( ($Is_MSWin32 or $Is_Dos or $^O eq 'os2') and
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$ret = check_file $dir,"$s.bat")
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or ( $ret = check_file "$dir/pod","$s.pod")
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or ( $ret = check_file "$dir/pod",$s)
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) {
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return $ret;
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}
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if ($recurse) {
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opendir(D,$dir);
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my @newdirs = map "$dir/$_", grep {
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not /^\.\.?$/ and
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not /^auto$/ and # save time! don't search auto dirs
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-d "$dir/$_"
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} readdir D;
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closedir(D);
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next unless @newdirs;
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@newdirs = map((s/.dir$//,$_)[1],@newdirs) if $Is_VMS;
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print STDERR "Also looking in @newdirs\n" if $opt_v;
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push(@dirs,@newdirs);
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}
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}
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return ();
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}
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my @found;
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foreach (@pages) {
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if ($podidx && open(PODIDX, $podidx)) {
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my $searchfor = $_;
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local($_);
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$searchfor =~ s,::,/,g;
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print STDERR "Searching for '$searchfor' in $podidx\n" if $opt_v;
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while (<PODIDX>) {
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chomp;
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push(@found, $_) if m,/$searchfor(?:\.(?:pod|pm))?$,i;
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}
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close(PODIDX);
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next;
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}
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print STDERR "Searching for $_\n" if $opt_v;
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# We must look both in @INC for library modules and in PATH
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# for executables, like h2xs or perldoc itself.
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my @searchdirs = @INC;
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if ($opt_F) {
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next unless -r;
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push @found, $_ if $opt_m or containspod($_);
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next;
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}
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unless ($opt_m) {
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if ($Is_VMS) {
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my($i,$trn);
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for ($i = 0; $trn = $ENV{'DCL$PATH'.$i}; $i++) {
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push(@searchdirs,$trn);
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}
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push(@searchdirs,'perl_root:[lib.pod]') # installed pods
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} else {
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push(@searchdirs, grep(-d, split($Config{path_sep},
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$ENV{'PATH'})));
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}
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}
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my @files = searchfor(0,$_,@searchdirs);
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if( @files ) {
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print STDERR "Found as @files\n" if $opt_v;
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} else {
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# no match, try recursive search
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@searchdirs = grep(!/^\.$/,@INC);
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@files= searchfor(1,$_,@searchdirs) if $opt_r;
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if( @files ) {
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print STDERR "Loosely found as @files\n" if $opt_v;
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} else {
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print STDERR "No documentation found for \"$_\".\n";
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if (@global_found) {
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print STDERR "However, try\n";
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for my $dir (@global_found) {
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opendir(DIR, $dir) or die "$!";
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while (my $file = readdir(DIR)) {
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next if ($file =~ /^\./);
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$file =~ s/\.(pm|pod)$//;
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print STDERR "\tperldoc $_\::$file\n";
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}
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closedir DIR;
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}
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}
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}
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}
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push(@found,@files);
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}
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if(!@found) {
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exit ($Is_VMS ? 98962 : 1);
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}
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if ($opt_l) {
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print join("\n", @found), "\n";
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exit;
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}
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my $lines = $ENV{LINES} || 24;
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my $no_tty;
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if( ! -t STDOUT ) { $no_tty = 1 }
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my $tmp;
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if ($Is_MSWin32) {
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$tmp = "$ENV{TEMP}\\perldoc1.$$";
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push @pagers, qw( more< less notepad );
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unshift @pagers, $ENV{PAGER} if $ENV{PAGER};
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} elsif ($Is_VMS) {
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$tmp = 'Sys$Scratch:perldoc.tmp1_'.$$;
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push @pagers, qw( most more less type/page );
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} elsif ($Is_Dos) {
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$tmp = "$ENV{TEMP}/perldoc1.$$";
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$tmp =~ tr!\\/!//!s;
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push @pagers, qw( less.exe more.com< );
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unshift @pagers, $ENV{PAGER} if $ENV{PAGER};
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} else {
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if ($^O eq 'os2') {
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require POSIX;
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$tmp = POSIX::tmpnam();
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unshift @pagers, 'less', 'cmd /c more <';
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} else {
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$tmp = "/tmp/perldoc1.$$";
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}
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push @pagers, qw( more less pg view cat );
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unshift @pagers, $ENV{PAGER} if $ENV{PAGER};
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}
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unshift @pagers, $ENV{PERLDOC_PAGER} if $ENV{PERLDOC_PAGER};
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if ($opt_m) {
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foreach my $pager (@pagers) {
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system("$pager @found") or exit;
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}
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if ($Is_VMS) { eval 'use vmsish qw(status exit); exit $?' }
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exit 1;
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}
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if ($opt_f) {
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my $perlfunc = shift @found;
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open(PFUNC, $perlfunc) or die "Can't open $perlfunc: $!";
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# Skip introduction
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while (<PFUNC>) {
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last if /^=head2 Alphabetical Listing of Perl Functions/;
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}
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# Look for our function
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my $found = 0;
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my @pod;
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while (<PFUNC>) {
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if (/^=item\s+\Q$opt_f\E\b/o) {
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$found = 1;
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} elsif (/^=item/) {
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last if $found > 1;
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}
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next unless $found;
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push @pod, $_;
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++$found if /^\w/; # found descriptive text
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}
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||
|
if (@pod) {
|
||
|
if ($opt_t) {
|
||
|
open(FORMATTER, "| pod2text") || die "Can't start filter";
|
||
|
print FORMATTER "=over 8\n\n";
|
||
|
print FORMATTER @pod;
|
||
|
print FORMATTER "=back\n";
|
||
|
close(FORMATTER);
|
||
|
} elsif (@pod < $lines-2) {
|
||
|
print @pod;
|
||
|
} else {
|
||
|
foreach my $pager (@pagers) {
|
||
|
open (PAGER, "| $pager") or next;
|
||
|
print PAGER @pod ;
|
||
|
close(PAGER) or next;
|
||
|
last;
|
||
|
}
|
||
|
}
|
||
|
} else {
|
||
|
die "No documentation for perl function `$opt_f' found\n";
|
||
|
}
|
||
|
exit;
|
||
|
}
|
||
|
|
||
|
if ($opt_q) {
|
||
|
local @ARGV = @found; # I'm lazy, sue me.
|
||
|
my $found = 0;
|
||
|
my %found_in;
|
||
|
my @pod;
|
||
|
|
||
|
while (<>) {
|
||
|
if (/^=head2\s+.*$opt_q/oi) {
|
||
|
$found = 1;
|
||
|
push @pod, "=head1 Found in $ARGV\n\n" unless $found_in{$ARGV}++;
|
||
|
} elsif (/^=head2/) {
|
||
|
$found = 0;
|
||
|
}
|
||
|
next unless $found;
|
||
|
push @pod, $_;
|
||
|
}
|
||
|
|
||
|
if (@pod) {
|
||
|
if ($opt_t) {
|
||
|
open(FORMATTER, "| pod2text") || die "Can't start filter";
|
||
|
print FORMATTER "=over 8\n\n";
|
||
|
print FORMATTER @pod;
|
||
|
print FORMATTER "=back\n";
|
||
|
close(FORMATTER);
|
||
|
} elsif (@pod < $lines-2) {
|
||
|
print @pod;
|
||
|
} else {
|
||
|
foreach my $pager (@pagers) {
|
||
|
open (PAGER, "| $pager") or next;
|
||
|
print PAGER @pod ;
|
||
|
close(PAGER) or next;
|
||
|
last;
|
||
|
}
|
||
|
}
|
||
|
} else {
|
||
|
die "No documentation for perl FAQ keyword `$opt_q' found\n";
|
||
|
}
|
||
|
exit;
|
||
|
}
|
||
|
|
||
|
foreach (@found) {
|
||
|
|
||
|
my $err;
|
||
|
if($opt_t) {
|
||
|
open(TMP,">>$tmp");
|
||
|
Pod::Text::pod2text($_,*TMP);
|
||
|
close(TMP);
|
||
|
} elsif(not $opt_u) {
|
||
|
my $cmd = "pod2man --lax $_ | nroff -man";
|
||
|
$cmd .= " | col -x" if $^O =~ /hpux/;
|
||
|
my $rslt = `$cmd`;
|
||
|
unless(($err = $?)) {
|
||
|
open(TMP,">>$tmp");
|
||
|
print TMP $rslt;
|
||
|
close TMP;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if( $opt_u or $err or -z $tmp) {
|
||
|
open(OUT,">>$tmp");
|
||
|
open(IN,"<$_");
|
||
|
my $cut = 1;
|
||
|
while (<IN>) {
|
||
|
$cut = $1 eq 'cut' if /^=(\w+)/;
|
||
|
next if $cut;
|
||
|
print OUT;
|
||
|
}
|
||
|
close(IN);
|
||
|
close(OUT);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if( $no_tty ) {
|
||
|
open(TMP,"<$tmp");
|
||
|
print while <TMP>;
|
||
|
close(TMP);
|
||
|
} else {
|
||
|
foreach my $pager (@pagers) {
|
||
|
system("$pager $tmp") or last;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
1 while unlink($tmp); #Possibly pointless VMSism
|
||
|
|
||
|
exit 0;
|
||
|
|
||
|
__END__
|
||
|
|
||
|
=head1 NAME
|
||
|
|
||
|
perldoc - Look up Perl documentation in pod format.
|
||
|
|
||
|
=head1 SYNOPSIS
|
||
|
|
||
|
B<perldoc> [B<-h>] [B<-v>] [B<-t>] [B<-u>] [B<-m>] [B<-l>] [B<-F>] [B<-X>] PageName|ModuleName|ProgramName
|
||
|
|
||
|
B<perldoc> B<-f> BuiltinFunction
|
||
|
|
||
|
B<perldoc> B<-q> FAQ Keyword
|
||
|
|
||
|
=head1 DESCRIPTION
|
||
|
|
||
|
I<perldoc> looks up a piece of documentation in .pod format that is embedded
|
||
|
in the perl installation tree or in a perl script, and displays it via
|
||
|
C<pod2man | nroff -man | $PAGER>. (In addition, if running under HP-UX,
|
||
|
C<col -x> will be used.) This is primarily used for the documentation for
|
||
|
the perl library modules.
|
||
|
|
||
|
Your system may also have man pages installed for those modules, in
|
||
|
which case you can probably just use the man(1) command.
|
||
|
|
||
|
=head1 OPTIONS
|
||
|
|
||
|
=over 5
|
||
|
|
||
|
=item B<-h> help
|
||
|
|
||
|
Prints out a brief help message.
|
||
|
|
||
|
=item B<-v> verbose
|
||
|
|
||
|
Describes search for the item in detail.
|
||
|
|
||
|
=item B<-t> text output
|
||
|
|
||
|
Display docs using plain text converter, instead of nroff. This may be faster,
|
||
|
but it won't look as nice.
|
||
|
|
||
|
=item B<-u> unformatted
|
||
|
|
||
|
Find docs only; skip reformatting by pod2*
|
||
|
|
||
|
=item B<-m> module
|
||
|
|
||
|
Display the entire module: both code and unformatted pod documentation.
|
||
|
This may be useful if the docs don't explain a function in the detail
|
||
|
you need, and you'd like to inspect the code directly; perldoc will find
|
||
|
the file for you and simply hand it off for display.
|
||
|
|
||
|
=item B<-l> file name only
|
||
|
|
||
|
Display the file name of the module found.
|
||
|
|
||
|
=item B<-F> file names
|
||
|
|
||
|
Consider arguments as file names, no search in directories will be performed.
|
||
|
|
||
|
=item B<-f> perlfunc
|
||
|
|
||
|
The B<-f> option followed by the name of a perl built in function will
|
||
|
extract the documentation of this function from L<perlfunc>.
|
||
|
|
||
|
=item B<-q> perlfaq
|
||
|
|
||
|
The B<-q> option takes a regular expression as an argument. It will search
|
||
|
the question headings in perlfaq[1-9] and print the entries matching
|
||
|
the regular expression.
|
||
|
|
||
|
=item B<-X> use an index if present
|
||
|
|
||
|
The B<-X> option looks for a entry whose basename matches the name given on the
|
||
|
command line in the file C<$Config{archlib}/pod.idx>. The pod.idx file should
|
||
|
contain fully qualified filenames, one per line.
|
||
|
|
||
|
=item B<PageName|ModuleName|ProgramName>
|
||
|
|
||
|
The item you want to look up. Nested modules (such as C<File::Basename>)
|
||
|
are specified either as C<File::Basename> or C<File/Basename>. You may also
|
||
|
give a descriptive name of a page, such as C<perlfunc>. You make also give a
|
||
|
partial or wrong-case name, such as "basename" for "File::Basename", but
|
||
|
this will be slower, if there is more then one page with the same partial
|
||
|
name, you will only get the first one.
|
||
|
|
||
|
=back
|
||
|
|
||
|
=head1 ENVIRONMENT
|
||
|
|
||
|
Any switches in the C<PERLDOC> environment variable will be used before the
|
||
|
command line arguments. C<perldoc> also searches directories
|
||
|
specified by the C<PERL5LIB> (or C<PERLLIB> if C<PERL5LIB> is not
|
||
|
defined) and C<PATH> environment variables.
|
||
|
(The latter is so that embedded pods for executables, such as
|
||
|
C<perldoc> itself, are available.) C<perldoc> will use, in order of
|
||
|
preference, the pager defined in C<PERLDOC_PAGER>, C<MANPAGER>, or
|
||
|
C<PAGER> before trying to find a pager on its own. (C<MANPAGER> is not
|
||
|
used if C<perldoc> was told to display plain text or unformatted pod.)
|
||
|
|
||
|
=head1 AUTHOR
|
||
|
|
||
|
Kenneth Albanowski <kjahds@kjahds.com>
|
||
|
|
||
|
Minor updates by Andy Dougherty <doughera@lafcol.lafayette.edu>
|
||
|
|
||
|
=cut
|
||
|
|
||
|
#
|
||
|
# Version 1.14: Wed Jul 15 01:50:20 EST 1998
|
||
|
# Robin Barker <rmb1@cise.npl.co.uk>
|
||
|
# -strict, -w cleanups
|
||
|
# Version 1.13: Fri Feb 27 16:20:50 EST 1997
|
||
|
# Gurusamy Sarathy <gsar@umich.edu>
|
||
|
# -doc tweaks for -F and -X options
|
||
|
# Version 1.12: Sat Apr 12 22:41:09 EST 1997
|
||
|
# Gurusamy Sarathy <gsar@umich.edu>
|
||
|
# -various fixes for win32
|
||
|
# Version 1.11: Tue Dec 26 09:54:33 EST 1995
|
||
|
# Kenneth Albanowski <kjahds@kjahds.com>
|
||
|
# -added Charles Bailey's further VMS patches, and -u switch
|
||
|
# -added -t switch, with pod2text support
|
||
|
#
|
||
|
# Version 1.10: Thu Nov 9 07:23:47 EST 1995
|
||
|
# Kenneth Albanowski <kjahds@kjahds.com>
|
||
|
# -added VMS support
|
||
|
# -added better error recognition (on no found pages, just exit. On
|
||
|
# missing nroff/pod2man, just display raw pod.)
|
||
|
# -added recursive/case-insensitive matching (thanks, Andreas). This
|
||
|
# slows things down a bit, unfortunately. Give a precise name, and
|
||
|
# it'll run faster.
|
||
|
#
|
||
|
# Version 1.01: Tue May 30 14:47:34 EDT 1995
|
||
|
# Andy Dougherty <doughera@lafcol.lafayette.edu>
|
||
|
# -added pod documentation.
|
||
|
# -added PATH searching.
|
||
|
# -added searching pod/ subdirectory (mainly to pick up perlfunc.pod
|
||
|
# and friends.
|
||
|
#
|
||
|
#
|
||
|
# TODO:
|
||
|
#
|
||
|
# Cache directories read during sloppy match
|
||
|
!NO!SUBS!
|
||
|
|
||
|
close OUT or die "Can't close $file: $!";
|
||
|
chmod 0755, $file or die "Can't reset permissions for $file: $!\n";
|
||
|
exec("$Config{'eunicefix'} $file") if $Config{'eunicefix'} ne ':';
|
||
|
chdir $origdir;
|