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1 | #!/usr/local/bin/perl |
2 | |
3 | use Config; |
4 | use File::Basename qw(&basename &dirname); |
5 | |
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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 |
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10 | # $startperl |
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11 | # to ensure Configure will look for $Config{startperl}. |
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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. |
15 | chdir(dirname($0)); |
16 | ($file = basename($0)) =~ s/\.PL$//; |
17 | $file =~ s/\.pl$// |
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18 | if ($^O eq 'VMS' or $^O eq 'os2'); # "case-forgiving" |
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19 | |
20 | open OUT,">$file" or die "Can't create $file: $!"; |
21 | |
22 | print "Extracting $file (with variable substitutions)\n"; |
23 | |
24 | # In this section, perl variables will be expanded during extraction. |
25 | # You can use $Config{...} to use Configure variables. |
26 | |
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27 | print OUT <<"!GROK!THIS!"; |
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28 | $Config{'startperl'} |
29 | eval 'exec perl -S \$0 "\$@"' |
30 | if 0; |
31 | !GROK!THIS! |
32 | |
33 | # In the following, perl variables are not expanded during extraction. |
34 | |
35 | print OUT <<'!NO!SUBS!'; |
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36 | eval 'exec perl -S $0 "$@"' |
37 | if 0; |
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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. |
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46 | |
47 | if(@ARGV<1) { |
48 | die <<EOF; |
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49 | Usage: $0 [-h] [-v] [-t] [-u] [-m] PageName|ModuleName|ProgramName |
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50 | |
51 | We suggest you use "perldoc perldoc" to get aquainted |
52 | with the system. |
53 | EOF |
54 | } |
55 | |
56 | use Getopt::Std; |
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57 | $Is_VMS = $^O eq 'VMS'; |
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58 | |
59 | sub usage{ |
60 | warn "@_\n" if @_; |
61 | die <<EOF; |
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62 | perldoc [-h] [-v] [-u] PageName|ModuleName|ProgramName... |
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63 | -h Display this help message. |
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64 | -t Display pod using pod2text instead of pod2man and nroff. |
65 | -u Display unformatted pod text |
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66 | -m Display modules file in its entirety |
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67 | -v Verbosely describe what's going on. |
68 | PageName|ModuleName... |
69 | is the name of a piece of documentation that you want to look at. You |
70 | may either give a descriptive name of the page (as in the case of |
71 | `perlfunc') the name of a module, either like `Term::Info', |
72 | `Term/Info', the partial name of a module, like `info', or |
73 | `makemaker', or the name of a program, like `perldoc'. |
74 | |
75 | Any switches in the PERLDOC environment variable will be used before the |
76 | command line arguments. |
77 | |
78 | EOF |
79 | } |
80 | |
81 | use Text::ParseWords; |
82 | |
83 | |
84 | unshift(@ARGV,shellwords($ENV{"PERLDOC"})); |
85 | |
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86 | getopts("mhtuv") || usage; |
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87 | |
88 | usage if $opt_h || $opt_h; # avoid -w warning |
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89 | |
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90 | usage("only one of -t, -u, or -m") if $opt_t + $opt_u + $opt_m > 1; |
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91 | |
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92 | if ($opt_t) { require Pod::Text; import Pod::Text; } |
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93 | |
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94 | @pages = @ARGV; |
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95 | |
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96 | sub containspod { |
97 | my($file) = @_; |
98 | local($_); |
99 | open(TEST,"<$file"); |
100 | while(<TEST>) { |
101 | if(/^=head/) { |
102 | close(TEST); |
103 | return 1; |
104 | } |
105 | } |
106 | close(TEST); |
107 | return 0; |
108 | } |
109 | |
110 | sub minus_f_nocase { |
111 | my($file) = @_; |
112 | local *DIR; |
113 | local($")="/"; |
114 | my(@p,$p,$cip); |
115 | foreach $p (split(/\//, $file)){ |
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116 | if ($Is_VMS and not scalar @p) { |
117 | # VMS filesystems don't begin at '/' |
118 | push(@p,$p); |
119 | next; |
120 | } |
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121 | if (-d ("@p/$p")){ |
122 | push @p, $p; |
123 | } elsif (-f ("@p/$p")) { |
124 | return "@p/$p"; |
125 | } else { |
126 | my $found=0; |
127 | my $lcp = lc $p; |
128 | opendir DIR, "@p"; |
129 | while ($cip=readdir(DIR)) { |
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130 | $cip =~ s/\.dir$// if $Is_VMS; |
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131 | if (lc $cip eq $lcp){ |
132 | $found++; |
133 | last; |
134 | } |
135 | } |
136 | closedir DIR; |
137 | return "" unless $found; |
138 | push @p, $cip; |
139 | return "@p" if -f "@p"; |
140 | } |
141 | } |
142 | return; # is not a file |
143 | } |
144 | |
145 | sub searchfor { |
146 | my($recurse,$s,@dirs) = @_; |
147 | $s =~ s!::!/!g; |
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148 | $s = VMS::Filespec::unixify($s) if $Is_VMS; |
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149 | printf STDERR "looking for $s in @dirs\n" if $opt_v; |
150 | my $ret; |
151 | my $i; |
152 | my $dir; |
153 | for ($i=0;$i<@dirs;$i++) { |
154 | $dir = $dirs[$i]; |
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155 | ($dir = VMS::Filespec::unixpath($dir)) =~ s!/$!! if $Is_VMS; |
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156 | if (( $ret = minus_f_nocase "$dir/$s.pod") |
157 | or ( $ret = minus_f_nocase "$dir/$s.pm" and containspod($ret)) |
158 | or ( $ret = minus_f_nocase "$dir/$s" and containspod($ret)) |
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159 | or ( $Is_VMS and |
160 | $ret = minus_f_nocase "$dir/$s.com" and containspod($ret)) |
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161 | or ( $ret = minus_f_nocase "$dir/pod/$s.pod") |
162 | or ( $ret = minus_f_nocase "$dir/pod/$s" and containspod($ret))) |
163 | { return $ret; } |
164 | |
165 | if($recurse) { |
166 | opendir(D,$dir); |
167 | my(@newdirs) = grep(-d,map("$dir/$_",grep(!/^\.\.?$/,readdir(D)))); |
168 | closedir(D); |
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169 | @newdirs = map((s/.dir$//,$_)[1],@newdirs) if $Is_VMS; |
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170 | next unless @newdirs; |
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171 | print STDERR "Also looking in @newdirs\n" if $opt_v; |
172 | push(@dirs,@newdirs); |
173 | } |
174 | } |
175 | return (); |
176 | } |
177 | |
178 | |
179 | foreach (@pages) { |
180 | print STDERR "Searching for $_\n" if $opt_v; |
181 | # We must look both in @INC for library modules and in PATH |
182 | # for executables, like h2xs or perldoc itself. |
183 | @searchdirs = @INC; |
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184 | unless ($opt_m) { |
185 | if ($Is_VMS) { |
186 | my($i,$trn); |
187 | for ($i = 0; $trn = $ENV{'DCL$PATH'.$i}; $i++) { |
188 | push(@searchdirs,$trn); |
189 | } |
190 | } else { |
191 | push(@searchdirs, grep(-d, split(':', $ENV{'PATH'}))); |
192 | } |
193 | @files= searchfor(0,$_,@searchdirs); |
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194 | } |
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195 | if( @files ) { |
196 | print STDERR "Found as @files\n" if $opt_v; |
197 | } else { |
198 | # no match, try recursive search |
199 | |
200 | @searchdirs = grep(!/^\.$/,@INC); |
201 | |
202 | |
203 | @files= searchfor(1,$_,@searchdirs); |
204 | if( @files ) { |
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205 | print STDERR "Loosely found as @files\n" if $opt_v; |
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206 | } else { |
207 | print STDERR "No documentation found for '$_'\n"; |
208 | } |
209 | } |
210 | push(@found,@files); |
211 | } |
212 | |
213 | if(!@found) { |
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214 | exit ($Is_VMS ? 98962 : 1); |
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215 | } |
216 | |
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217 | if( ! -t STDOUT ) { $opt_f = 1 } |
218 | |
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219 | unless($Is_VMS) { |
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220 | $tmp = "/tmp/perldoc1.$$"; |
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221 | $goodresult = 0; |
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222 | @pagers = qw( more less pg view cat ); |
223 | unshift(@pagers,$ENV{PAGER}) if $ENV{PAGER}; |
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224 | } else { |
225 | $tmp = 'Sys$Scratch:perldoc.tmp1_'.$$; |
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226 | @pagers = qw( most more less type/page ); |
227 | unshift(@pagers,$ENV{PERLDOC_PAGER}) if $ENV{PERLDOC_PAGER}; |
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228 | $goodresult = 1; |
229 | } |
230 | |
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231 | if ($opt_m) { |
232 | foreach $pager (@pagers) { |
233 | my($sts) = system("$pager @found"); |
234 | exit 0 if ($Is_VMS ? ($sts & 1) : !$sts); |
235 | } |
236 | exit $Is_VMS ? $sts : 1; |
237 | } |
238 | |
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239 | foreach (@found) { |
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240 | |
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241 | if($opt_t) { |
242 | open(TMP,">>$tmp"); |
243 | Pod::Text::pod2text($_,*TMP); |
244 | close(TMP); |
245 | } elsif(not $opt_u) { |
246 | open(TMP,">>$tmp"); |
247 | $rslt = `pod2man $_ | nroff -man`; |
248 | if ($Is_VMS) { $err = !($? % 2) || $rslt =~ /IVVERB/; } |
249 | else { $err = $?; } |
250 | print TMP $rslt unless $err; |
251 | close TMP; |
252 | } |
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253 | |
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254 | if( $opt_u or $err or -z $tmp) { |
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255 | open(OUT,">>$tmp"); |
256 | open(IN,"<$_"); |
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257 | $cut = 1; |
258 | while (<IN>) { |
259 | $cut = $1 eq 'cut' if /^=(\w+)/; |
260 | next if $cut; |
261 | print OUT; |
262 | } |
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263 | close(IN); |
264 | close(OUT); |
265 | } |
266 | } |
267 | |
268 | if( $opt_f ) { |
269 | open(TMP,"<$tmp"); |
270 | print while <TMP>; |
271 | close(TMP); |
272 | } else { |
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273 | foreach $pager (@pagers) { |
274 | $sts = system("$pager $tmp"); |
275 | last if $Is_VMS && ($sts & 1); |
276 | last unless $sts; |
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277 | } |
278 | } |
279 | |
280 | 1 while unlink($tmp); #Possibly pointless VMSism |
281 | |
282 | exit 0; |
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283 | |
284 | __END__ |
285 | |
286 | =head1 NAME |
287 | |
288 | perldoc - Look up Perl documentation in pod format. |
289 | |
290 | =head1 SYNOPSIS |
291 | |
292 | B<perldoc> [B<-h>] [B<-v>] [B<-t>] [B<-u>] PageName|ModuleName|ProgramName |
293 | |
294 | =head1 DESCRIPTION |
295 | |
296 | I<perldoc> looks up a piece of documentation in .pod format that is |
297 | embedded in the perl installation tree or in a perl script, and displays |
298 | it via pod2man | nroff -man | $PAGER. This is primarily used for the |
299 | documentation for the perl library modules. |
300 | |
301 | Your system may also have man pages installed for those modules, in |
302 | which case you can probably just use the man(1) command. |
303 | |
304 | =head1 OPTIONS |
305 | |
306 | =over 5 |
307 | |
308 | =item B<-h> help |
309 | |
310 | Prints out a brief help message. |
311 | |
312 | =item B<-v> verbose |
313 | |
314 | Describes search for the item in detail. |
315 | |
316 | =item B<-t> text output |
317 | |
318 | Display docs using plain text converter, instead of nroff. This may be faster, |
319 | but it won't look as nice. |
320 | |
321 | =item B<-u> unformatted |
322 | |
323 | Find docs only; skip reformatting by pod2* |
324 | |
325 | =item B<-m> module |
326 | |
327 | Display the entire module: both code and unformatted pod documentation. |
328 | This may be useful if the docs don't explain a function in the detail |
329 | you need, and you'd like to inspect the code directly; perldoc will find |
330 | the file for you and simply hand it off for display. |
331 | |
332 | =item B<PageName|ModuleName|ProgramName> |
333 | |
334 | The item you want to look up. Nested modules (such as C<File::Basename>) |
335 | are specified either as C<File::Basename> or C<File/Basename>. You may also |
336 | give a descriptive name of a page, such as C<perlfunc>. You make also give a |
337 | partial or wrong-case name, such as "basename" for "File::Basename", but |
338 | this will be slower, if there is more then one page with the same partial |
339 | name, you will only get the first one. |
340 | |
341 | =back |
342 | |
343 | =head1 ENVIRONMENT |
344 | |
345 | Any switches in the C<PERLDOC> environment variable will be used before the |
346 | command line arguments. C<perldoc> also searches directories |
347 | specified by the C<PERL5LIB> (or C<PERLLIB> if C<PERL5LIB> is not |
348 | defined) and C<PATH> environment variables. |
349 | (The latter is so that embedded pods for executables, such as |
350 | C<perldoc> itself, are available.) |
351 | |
352 | =head1 AUTHOR |
353 | |
354 | Kenneth Albanowski <kjahds@kjahds.com> |
355 | |
356 | Minor updates by Andy Dougherty <doughera@lafcol.lafayette.edu> |
357 | |
358 | =head1 SEE ALSO |
359 | |
360 | =head1 DIAGNOSTICS |
361 | |
362 | =cut |
363 | |
364 | # |
365 | # Version 1.11: Tue Dec 26 09:54:33 EST 1995 |
366 | # Kenneth Albanowski <kjahds@kjahds.com> |
367 | # -added Charles Bailey's further VMS patches, and -u switch |
368 | # -added -t switch, with pod2text support |
369 | # |
370 | # Version 1.10: Thu Nov 9 07:23:47 EST 1995 |
371 | # Kenneth Albanowski <kjahds@kjahds.com> |
372 | # -added VMS support |
373 | # -added better error recognition (on no found pages, just exit. On |
374 | # missing nroff/pod2man, just display raw pod.) |
375 | # -added recursive/case-insensitive matching (thanks, Andreas). This |
376 | # slows things down a bit, unfortunately. Give a precise name, and |
377 | # it'll run faster. |
378 | # |
379 | # Version 1.01: Tue May 30 14:47:34 EDT 1995 |
380 | # Andy Dougherty <doughera@lafcol.lafayette.edu> |
381 | # -added pod documentation. |
382 | # -added PATH searching. |
383 | # -added searching pod/ subdirectory (mainly to pick up perlfunc.pod |
384 | # and friends. |
385 | # |
386 | # |
387 | # TODO: |
388 | # |
389 | # Cache directories read during sloppy match |
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390 | !NO!SUBS! |
391 | |
392 | close OUT or die "Can't close $file: $!"; |
393 | chmod 0755, $file or die "Can't reset permissions for $file: $!\n"; |
394 | exec("$Config{'eunicefix'} $file") if $Config{'eunicefix'} ne ':'; |