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3fea05b9 |
1 | use strict; |
2 | use warnings; |
3 | |
4 | package local::lib; |
5 | |
6 | use 5.008001; # probably works with earlier versions but I'm not supporting them |
7 | # (patches would, of course, be welcome) |
8 | |
9 | use File::Spec (); |
10 | use File::Path (); |
11 | use Carp (); |
12 | use Config; |
13 | |
14 | our $VERSION = '1.004009'; # 1.4.9 |
15 | my @KNOWN_FLAGS = (qw/--self-contained/); |
16 | |
17 | sub import { |
18 | my ($class, @args) = @_; |
19 | @args <= 1 + @KNOWN_FLAGS or die <<'DEATH'; |
20 | Please see `perldoc local::lib` for directions on using this module. |
21 | DEATH |
22 | |
23 | # Remember what PERL5LIB was when we started |
24 | my $perl5lib = $ENV{PERL5LIB} || ''; |
25 | |
26 | my %arg_store; |
27 | for my $arg (@args) { |
28 | # check for lethal dash first to stop processing before causing problems |
29 | if ($arg =~ /−/) { |
30 | die <<'DEATH'; |
31 | WHOA THERE! It looks like you've got some fancy dashes in your commandline! |
32 | These are *not* the traditional -- dashes that software recognizes. You |
33 | probably got these by copy-pasting from the perldoc for this module as |
34 | rendered by a UTF8-capable formatter. This most typically happens on an OS X |
35 | terminal, but can happen elsewhere too. Please try again after replacing the |
36 | dashes with normal minus signs. |
37 | DEATH |
38 | } |
39 | elsif(grep { $arg eq $_ } @KNOWN_FLAGS) { |
40 | (my $flag = $arg) =~ s/--//; |
41 | $arg_store{$flag} = 1; |
42 | } |
43 | elsif($arg =~ /^--/) { |
44 | die "Unknown import argument: $arg"; |
45 | } |
46 | else { |
47 | # assume that what's left is a path |
48 | $arg_store{path} = $arg; |
49 | } |
50 | } |
51 | |
52 | if($arg_store{'self-contained'}) { |
53 | # The only directories that remain are those that we just defined and those |
54 | # where core modules are stored. We put PERL5LIB first, so it'll be favored |
55 | # over privlibexp and archlibexp |
56 | |
57 | @INC = _uniq( |
58 | $class->install_base_arch_path($arg_store{path}), |
59 | $class->install_base_perl_path($arg_store{path}), |
60 | split( $Config{path_sep}, $perl5lib ), |
61 | $Config::Config{archlibexp}, |
62 | $Config::Config{privlibexp}, |
63 | ); |
64 | |
65 | # We explicitly set PERL5LIB here to the above de-duped list to prevent |
66 | # @INC from growing with each invocation |
67 | $ENV{PERL5LIB} = join( $Config{path_sep}, @INC ); |
68 | } |
69 | |
70 | $arg_store{path} = $class->resolve_path($arg_store{path}); |
71 | $class->setup_local_lib_for($arg_store{path}); |
72 | |
73 | for (@INC) { # Untaint @INC |
74 | next if ref; # Skip entry if it is an ARRAY, CODE, blessed, etc. |
75 | m/(.*)/ and $_ = $1; |
76 | } |
77 | } |
78 | |
79 | sub pipeline; |
80 | |
81 | sub pipeline { |
82 | my @methods = @_; |
83 | my $last = pop(@methods); |
84 | if (@methods) { |
85 | \sub { |
86 | my ($obj, @args) = @_; |
87 | $obj->${pipeline @methods}( |
88 | $obj->$last(@args) |
89 | ); |
90 | }; |
91 | } else { |
92 | \sub { |
93 | shift->$last(@_); |
94 | }; |
95 | } |
96 | } |
97 | |
98 | =begin testing |
99 | |
100 | #:: test pipeline |
101 | |
102 | package local::lib; |
103 | |
104 | { package Foo; sub foo { -$_[1] } sub bar { $_[1]+2 } sub baz { $_[1]+3 } } |
105 | my $foo = bless({}, 'Foo'); |
106 | Test::More::ok($foo->${pipeline qw(foo bar baz)}(10) == -15); |
107 | |
108 | =end testing |
109 | |
110 | =cut |
111 | |
112 | sub _uniq { |
113 | my %seen; |
114 | grep { ! $seen{$_}++ } @_; |
115 | } |
116 | |
117 | sub resolve_path { |
118 | my ($class, $path) = @_; |
119 | $class->${pipeline qw( |
120 | resolve_relative_path |
121 | resolve_home_path |
122 | resolve_empty_path |
123 | )}($path); |
124 | } |
125 | |
126 | sub resolve_empty_path { |
127 | my ($class, $path) = @_; |
128 | if (defined $path) { |
129 | $path; |
130 | } else { |
131 | '~/perl5'; |
132 | } |
133 | } |
134 | |
135 | =begin testing |
136 | |
137 | #:: test classmethod setup |
138 | |
139 | my $c = 'local::lib'; |
140 | |
141 | =end testing |
142 | |
143 | =begin testing |
144 | |
145 | #:: test classmethod |
146 | |
147 | is($c->resolve_empty_path, '~/perl5'); |
148 | is($c->resolve_empty_path('foo'), 'foo'); |
149 | |
150 | =end testing |
151 | |
152 | =cut |
153 | |
154 | sub resolve_home_path { |
155 | my ($class, $path) = @_; |
156 | return $path unless ($path =~ /^~/); |
157 | my ($user) = ($path =~ /^~([^\/]+)/); # can assume ^~ so undef for 'us' |
158 | my $tried_file_homedir; |
159 | my $homedir = do { |
160 | if (eval { require File::HomeDir } && $File::HomeDir::VERSION >= 0.65) { |
161 | $tried_file_homedir = 1; |
162 | if (defined $user) { |
163 | File::HomeDir->users_home($user); |
164 | } else { |
165 | File::HomeDir->my_home; |
166 | } |
167 | } else { |
168 | if (defined $user) { |
169 | (getpwnam $user)[7]; |
170 | } else { |
171 | if (defined $ENV{HOME}) { |
172 | $ENV{HOME}; |
173 | } else { |
174 | (getpwuid $<)[7]; |
175 | } |
176 | } |
177 | } |
178 | }; |
179 | unless (defined $homedir) { |
180 | Carp::croak( |
181 | "Couldn't resolve homedir for " |
182 | .(defined $user ? $user : 'current user') |
183 | .($tried_file_homedir ? '' : ' - consider installing File::HomeDir') |
184 | ); |
185 | } |
186 | $path =~ s/^~[^\/]*/$homedir/; |
187 | $path; |
188 | } |
189 | |
190 | sub resolve_relative_path { |
191 | my ($class, $path) = @_; |
192 | $path = File::Spec->rel2abs($path); |
193 | } |
194 | |
195 | =begin testing |
196 | |
197 | #:: test classmethod |
198 | |
199 | local *File::Spec::rel2abs = sub { shift; 'FOO'.shift; }; |
200 | is($c->resolve_relative_path('bar'),'FOObar'); |
201 | |
202 | =end testing |
203 | |
204 | =cut |
205 | |
206 | sub setup_local_lib_for { |
207 | my ($class, $path) = @_; |
208 | $path = $class->ensure_dir_structure_for($path); |
209 | if ($0 eq '-') { |
210 | $class->print_environment_vars_for($path); |
211 | exit 0; |
212 | } else { |
213 | $class->setup_env_hash_for($path); |
214 | @INC = _uniq(split($Config{path_sep}, $ENV{PERL5LIB}), @INC); |
215 | } |
216 | } |
217 | |
218 | sub modulebuildrc_path { |
219 | my ($class, $path) = @_; |
220 | File::Spec->catfile($path, '.modulebuildrc'); |
221 | } |
222 | |
223 | sub install_base_bin_path { |
224 | my ($class, $path) = @_; |
225 | File::Spec->catdir($path, 'bin'); |
226 | } |
227 | |
228 | sub install_base_perl_path { |
229 | my ($class, $path) = @_; |
230 | File::Spec->catdir($path, 'lib', 'perl5'); |
231 | } |
232 | |
233 | sub install_base_arch_path { |
234 | my ($class, $path) = @_; |
235 | File::Spec->catdir($class->install_base_perl_path($path), $Config{archname}); |
236 | } |
237 | |
238 | sub ensure_dir_structure_for { |
239 | my ($class, $path) = @_; |
240 | unless (-d $path) { |
241 | warn "Attempting to create directory ${path}\n"; |
242 | } |
243 | File::Path::mkpath($path); |
244 | # Need to have the path exist to make a short name for it, so |
245 | # converting to a short name here. |
246 | $path = Win32::GetShortPathName($path) if $^O eq 'MSWin32'; |
247 | my $modulebuildrc_path = $class->modulebuildrc_path($path); |
248 | if (-e $modulebuildrc_path) { |
249 | unless (-f _) { |
250 | Carp::croak("${modulebuildrc_path} exists but is not a plain file"); |
251 | } |
252 | } else { |
253 | warn "Attempting to create file ${modulebuildrc_path}\n"; |
254 | open MODULEBUILDRC, '>', $modulebuildrc_path |
255 | || Carp::croak("Couldn't open ${modulebuildrc_path} for writing: $!"); |
256 | print MODULEBUILDRC qq{install --install_base ${path}\n} |
257 | || Carp::croak("Couldn't write line to ${modulebuildrc_path}: $!"); |
258 | close MODULEBUILDRC |
259 | || Carp::croak("Couldn't close file ${modulebuildrc_path}: $@"); |
260 | } |
261 | |
262 | return $path; |
263 | } |
264 | |
265 | sub INTERPOLATE_ENV () { 1 } |
266 | sub LITERAL_ENV () { 0 } |
267 | |
268 | sub print_environment_vars_for { |
269 | my ($class, $path) = @_; |
270 | my @envs = $class->build_environment_vars_for($path, LITERAL_ENV); |
271 | my $out = ''; |
272 | |
273 | # rather basic csh detection, goes on the assumption that something won't |
274 | # call itself csh unless it really is. also, default to bourne in the |
275 | # pathological situation where a user doesn't have $ENV{SHELL} defined. |
276 | # note also that shells with funny names, like zoid, are assumed to be |
277 | # bourne. |
278 | my $shellbin = 'sh'; |
279 | if(defined $ENV{'SHELL'}) { |
280 | my @shell_bin_path_parts = File::Spec->splitpath($ENV{'SHELL'}); |
281 | $shellbin = $shell_bin_path_parts[-1]; |
282 | } |
283 | my $shelltype = do { |
284 | local $_ = $shellbin; |
285 | if(/csh/) { |
286 | 'csh' |
287 | } else { |
288 | 'bourne' |
289 | } |
290 | }; |
291 | |
292 | # Both Win32 and Cygwin have $ENV{COMSPEC} set. |
293 | if (defined $ENV{'COMSPEC'} && $^O ne 'cygwin') { |
294 | my @shell_bin_path_parts = File::Spec->splitpath($ENV{'COMSPEC'}); |
295 | $shellbin = $shell_bin_path_parts[-1]; |
296 | $shelltype = do { |
297 | local $_ = $shellbin; |
298 | if(/command\.com/) { |
299 | 'win32' |
300 | } elsif(/cmd\.exe/) { |
301 | 'win32' |
302 | } elsif(/4nt\.exe/) { |
303 | 'win32' |
304 | } else { |
305 | $shelltype |
306 | } |
307 | }; |
308 | } |
309 | |
310 | while (@envs) { |
311 | my ($name, $value) = (shift(@envs), shift(@envs)); |
312 | $value =~ s/(\\")/\\$1/g; |
313 | $out .= $class->${\"build_${shelltype}_env_declaration"}($name, $value); |
314 | } |
315 | print $out; |
316 | } |
317 | |
318 | # simple routines that take two arguments: an %ENV key and a value. return |
319 | # strings that are suitable for passing directly to the relevant shell to set |
320 | # said key to said value. |
321 | sub build_bourne_env_declaration { |
322 | my $class = shift; |
323 | my($name, $value) = @_; |
324 | return qq{export ${name}="${value}"\n}; |
325 | } |
326 | |
327 | sub build_csh_env_declaration { |
328 | my $class = shift; |
329 | my($name, $value) = @_; |
330 | return qq{setenv ${name} "${value}"\n}; |
331 | } |
332 | |
333 | sub build_win32_env_declaration { |
334 | my $class = shift; |
335 | my($name, $value) = @_; |
336 | return qq{set ${name}=${value}\n}; |
337 | } |
338 | |
339 | sub setup_env_hash_for { |
340 | my ($class, $path) = @_; |
341 | my %envs = $class->build_environment_vars_for($path, INTERPOLATE_ENV); |
342 | @ENV{keys %envs} = values %envs; |
343 | } |
344 | |
345 | sub build_environment_vars_for { |
346 | my ($class, $path, $interpolate) = @_; |
347 | return ( |
348 | MODULEBUILDRC => $class->modulebuildrc_path($path), |
349 | PERL_MM_OPT => "INSTALL_BASE=${path}", |
350 | PERL5LIB => join($Config{path_sep}, |
351 | $class->install_base_perl_path($path), |
352 | $class->install_base_arch_path($path), |
353 | ($ENV{PERL5LIB} ? |
354 | ($interpolate == INTERPOLATE_ENV |
355 | ? ($ENV{PERL5LIB}) |
356 | : (($^O ne 'MSWin32') ? '$PERL5LIB' : '%PERL5LIB%' )) |
357 | : ()) |
358 | ), |
359 | PATH => join($Config{path_sep}, |
360 | $class->install_base_bin_path($path), |
361 | ($interpolate == INTERPOLATE_ENV |
362 | ? $ENV{PATH} |
363 | : (($^O ne 'MSWin32') ? '$PATH' : '%PATH%' )) |
364 | ), |
365 | ) |
366 | } |
367 | |
368 | =begin testing |
369 | |
370 | #:: test classmethod |
371 | |
372 | File::Path::rmtree('t/var/splat'); |
373 | |
374 | $c->ensure_dir_structure_for('t/var/splat'); |
375 | |
376 | ok(-d 't/var/splat'); |
377 | |
378 | ok(-f 't/var/splat/.modulebuildrc'); |
379 | |
380 | =end testing |
381 | |
382 | =head1 NAME |
383 | |
384 | local::lib - create and use a local lib/ for perl modules with PERL5LIB |
385 | |
386 | =head1 SYNOPSIS |
387 | |
388 | In code - |
389 | |
390 | use local::lib; # sets up a local lib at ~/perl5 |
391 | |
392 | use local::lib '~/foo'; # same, but ~/foo |
393 | |
394 | # Or... |
395 | use FindBin; |
396 | use local::lib "$FindBin::Bin/../support"; # app-local support library |
397 | |
398 | From the shell - |
399 | |
400 | # Install LWP and it's missing dependencies to the 'my_lwp' directory |
401 | perl -MCPAN -Mlocal::lib=my_lwp -e 'CPAN::install(LWP)' |
402 | |
403 | # Install LWP and *all non-core* dependencies to the 'my_lwp' directory |
404 | perl -MCPAN -Mlocal::lib=--self-contained,my_lwp -e 'CPAN::install(LWP)' |
405 | |
406 | # Just print out useful shell commands |
407 | $ perl -Mlocal::lib |
408 | export MODULEBUILDRC=/home/username/perl/.modulebuildrc |
409 | export PERL_MM_OPT='INSTALL_BASE=/home/username/perl' |
410 | export PERL5LIB='/home/username/perl/lib/perl5:/home/username/perl/lib/perl5/i386-linux' |
411 | export PATH="/home/username/perl/bin:$PATH" |
412 | |
413 | =head2 The bootstrapping technique |
414 | |
415 | A typical way to install local::lib is using what is known as the |
416 | "bootstrapping" technique. You would do this if your system administrator |
417 | hasn't already installed local::lib. In this case, you'll need to install |
418 | local::lib in your home directory. |
419 | |
420 | 1. Download and unpack the local::lib tarball from CPAN (search for "Download" |
421 | on the CPAN page about local::lib). Do this as an ordinary user, not as root |
422 | or administrator. Unpack the file in your home directory or in any other |
423 | convenient location. |
424 | |
425 | 2. Run this: |
426 | |
427 | perl Makefile.PL --bootstrap |
428 | |
429 | If the system asks you whether it should automatically configure as much |
430 | as possible, you would typically answer yes. |
431 | |
432 | 3. Run this: |
433 | |
434 | make test && make install |
435 | |
436 | 4. Arrange for Perl to use your own packages instead of the system |
437 | packages. If you are using bash, you can do this as follows: |
438 | |
439 | echo 'eval $(perl -I$HOME/perl5/lib/perl5 -Mlocal::lib)' >>~/.bashrc |
440 | |
441 | If you are using C shell, you can do this as follows: |
442 | |
443 | /bin/csh |
444 | echo $SHELL |
445 | /bin/csh |
446 | perl -I$HOME/perl5/lib/perl5 -Mlocal::lib >> ~/.cshrc |
447 | |
448 | You can also pass --bootstrap=~/foo to get a different location - |
449 | |
450 | perl Makefile.PL --bootstrap=~/foo |
451 | make test && make install |
452 | |
453 | echo 'eval $(perl -I$HOME/foo/lib/perl5 -Mlocal::lib=$HOME/foo)' >>~/.bashrc |
454 | |
455 | After writing your shell configuration file, be sure to re-read it to get the |
456 | changed settings into your current shell's environment. |
457 | |
458 | . ~/.bashrc |
459 | |
460 | If you are using C shell, you can do this as follows: |
461 | |
462 | /bin/csh |
463 | echo $SHELL |
464 | /bin/csh |
465 | perl -I$HOME/perl5/lib/perl5 -Mlocal::lib >> ~/.cshrc |
466 | |
467 | source ~/.cshrc |
468 | |
469 | You can also pass --bootstrap=~/foo to get a different location - |
470 | |
471 | perl Makefile.PL --bootstrap=~/foo |
472 | make test && make install |
473 | |
474 | echo 'eval $(perl -I$HOME/foo/lib/perl5 -Mlocal::lib=$HOME/foo)' >> ~/.bashrc |
475 | |
476 | . ~/.bashrc |
477 | |
478 | If you're on a slower machine, or are operating under draconian disk space |
479 | limitations, you can disable the automatic generation of manpages from POD when |
480 | installing modules by using the C<--no-manpages> argument when bootstrapping: |
481 | |
482 | perl Makefile.PL --bootstrap --no-manpages |
483 | |
484 | If you want to install multiple Perl module environments, say for application evelopment, |
485 | install local::lib globally and then: |
486 | |
487 | cd ~/mydir1 |
488 | perl -Mlocal::lib=./ |
489 | eval $(perl -Mlocal::lib=./) ### To set the environment for this shell alone |
490 | printenv ### You will see that ~/mydir1 is in the PERL5LIB |
491 | perl -MCPAN -e install ... ### whatever modules you want |
492 | cd ../mydir2 |
493 | ... REPEAT ... |
494 | |
495 | For multiple environments for multiple apps you may need to include a modified |
496 | version of the C<< use FindBin >> instructions in the "In code" sample above. |
497 | If you did something like the above, you have a set of Perl modules at C<< |
498 | ~/mydir1/lib >>. If you have a script at C<< ~/mydir1/scripts/myscript.pl >>, |
499 | you need to tell it where to find the modules you installed for it at C<< |
500 | ~/mydir1/lib >>. |
501 | |
502 | In C<< ~/mydir1/scripts/myscript.pl >>: |
503 | |
504 | use strict; |
505 | use warnings; |
506 | use local::lib "$FindBin::Bin/.."; ### points to ~/mydir1 and local::lib finds lib |
507 | use lib "$FindBin::Bin/../lib"; ### points to ~/mydir1/lib |
508 | |
509 | Put this before any BEGIN { ... } blocks that require the modules you installed. |
510 | |
511 | =head2 Differences when using this module under Win32 |
512 | |
513 | C:\>perl -Mlocal::lib |
514 | set MODULEBUILDRC=C:\DOCUME~1\ADMINI~1\perl5\.modulebuildrc |
515 | set PERL_MM_OPT=INSTALL_BASE=C:\DOCUME~1\ADMINI~1\perl5 |
516 | set PERL5LIB=C:\DOCUME~1\ADMINI~1\perl5\lib\perl5;C:\DOCUME~1\ADMINI~1\perl5\lib\perl5\MSWin32-x86-multi-thread |
517 | set PATH=C:\DOCUME~1\ADMINI~1\perl5\bin;%PATH% |
518 | |
519 | ### To set the environment for this shell alone |
520 | C:\>perl -Mlocal::lib > %TEMP%\tmp.bat && %TEMP%\tmp.bat && del %TEMP%\temp.bat |
521 | ### instead of $(perl -Mlocal::lib=./) |
522 | |
523 | If you want the environment entries to persist, you'll need to add then to the |
524 | Control Panel's System applet yourself at the moment. |
525 | |
526 | The "~" is translated to the user's profile directory (the directory named for |
527 | the user under "Documents and Settings" (Windows XP or earlier) or "Users" |
528 | (Windows Vista or later) unless $ENV{HOME} exists. After that, the home |
529 | directory is translated to a short name (which means the directory must exist) |
530 | and the subdirectories are created. |
531 | |
532 | =head1 RATIONALE |
533 | |
534 | The version of a Perl package on your machine is not always the version you |
535 | need. Obviously, the best thing to do would be to update to the version you |
536 | need. However, you might be in a situation where you're prevented from doing |
537 | this. Perhaps you don't have system administrator privileges; or perhaps you |
538 | are using a package management system such as Debian, and nobody has yet gotten |
539 | around to packaging up the version you need. |
540 | |
541 | local::lib solves this problem by allowing you to create your own directory of |
542 | Perl packages downloaded from CPAN (in a multi-user system, this would typically |
543 | be within your own home directory). The existing system Perl installation is |
544 | not affected; you simply invoke Perl with special options so that Perl uses the |
545 | packages in your own local package directory rather than the system packages. |
546 | local::lib arranges things so that your locally installed version of the Perl |
547 | packages takes precedence over the system installation. |
548 | |
549 | If you are using a package management system (such as Debian), you don't need to |
550 | worry about Debian and CPAN stepping on each other's toes. Your local version |
551 | of the packages will be written to an entirely separate directory from those |
552 | installed by Debian. |
553 | |
554 | =head1 DESCRIPTION |
555 | |
556 | This module provides a quick, convenient way of bootstrapping a user-local Perl |
557 | module library located within the user's home directory. It also constructs and |
558 | prints out for the user the list of environment variables using the syntax |
559 | appropriate for the user's current shell (as specified by the C<SHELL> |
560 | environment variable), suitable for directly adding to one's shell |
561 | configuration file. |
562 | |
563 | More generally, local::lib allows for the bootstrapping and usage of a |
564 | directory containing Perl modules outside of Perl's C<@INC>. This makes it |
565 | easier to ship an application with an app-specific copy of a Perl module, or |
566 | collection of modules. Useful in cases like when an upstream maintainer hasn't |
567 | applied a patch to a module of theirs that you need for your application. |
568 | |
569 | On import, local::lib sets the following environment variables to appropriate |
570 | values: |
571 | |
572 | =over 4 |
573 | |
574 | =item MODULEBUILDRC |
575 | |
576 | =item PERL_MM_OPT |
577 | |
578 | =item PERL5LIB |
579 | |
580 | =item PATH |
581 | |
582 | PATH is appended to, rather than clobbered. |
583 | |
584 | =back |
585 | |
586 | These values are then available for reference by any code after import. |
587 | |
588 | =head1 METHODS |
589 | |
590 | =head2 ensure_directory_structure_for |
591 | |
592 | =over 4 |
593 | |
594 | =item Arguments: path |
595 | |
596 | =back |
597 | |
598 | Attempts to create the given path, and all required parent directories. Throws |
599 | an exception on failure. |
600 | |
601 | =head2 print_environment_vars_for |
602 | |
603 | =over 4 |
604 | |
605 | =item Arguments: path |
606 | |
607 | =back |
608 | |
609 | Prints to standard output the variables listed above, properly set to use the |
610 | given path as the base directory. |
611 | |
612 | =head2 setup_env_hash_for |
613 | |
614 | =over 4 |
615 | |
616 | =item Arguments: path |
617 | |
618 | =back |
619 | |
620 | Constructs the C<%ENV> keys for the given path, by calling |
621 | C<build_environment_vars_for>. |
622 | |
623 | =head2 install_base_perl_path |
624 | |
625 | =over 4 |
626 | |
627 | =item Arguments: path |
628 | |
629 | =back |
630 | |
631 | Returns a path describing where to install the Perl modules for this local |
632 | library installation. Appends the directories C<lib> and C<perl5> to the given |
633 | path. |
634 | |
635 | =head2 install_base_arch_path |
636 | |
637 | =over 4 |
638 | |
639 | =item Arguments: path |
640 | |
641 | =back |
642 | |
643 | Returns a path describing where to install the architecture-specific Perl |
644 | modules for this local library installation. Based on the |
645 | L</install_base_perl_path> method's return value, and appends the value of |
646 | C<$Config{archname}>. |
647 | |
648 | =head2 install_base_bin_path |
649 | |
650 | =over 4 |
651 | |
652 | =item Arguments: path |
653 | |
654 | =back |
655 | |
656 | Returns a path describing where to install the executable programs for this |
657 | local library installation. Based on the L</install_base_perl_path> method's |
658 | return value, and appends the directory C<bin>. |
659 | |
660 | =head2 modulebuildrc_path |
661 | |
662 | =over 4 |
663 | |
664 | =item Arguments: path |
665 | |
666 | =back |
667 | |
668 | Returns a path describing where to install the C<.modulebuildrc> file, based on |
669 | the given path. |
670 | |
671 | =head2 resolve_empty_path |
672 | |
673 | =over 4 |
674 | |
675 | =item Arguments: path |
676 | |
677 | =back |
678 | |
679 | Builds and returns the base path into which to set up the local module |
680 | installation. Defaults to C<~/perl5>. |
681 | |
682 | =head2 resolve_home_path |
683 | |
684 | =over 4 |
685 | |
686 | =item Arguments: path |
687 | |
688 | =back |
689 | |
690 | Attempts to find the user's home directory. If installed, uses C<File::HomeDir> |
691 | for this purpose. If no definite answer is available, throws an exception. |
692 | |
693 | =head2 resolve_relative_path |
694 | |
695 | =over 4 |
696 | |
697 | =item Arguments: path |
698 | |
699 | =back |
700 | |
701 | Translates the given path into an absolute path. |
702 | |
703 | =head2 resolve_path |
704 | |
705 | =over 4 |
706 | |
707 | =item Arguments: path |
708 | |
709 | =back |
710 | |
711 | Calls the following in a pipeline, passing the result from the previous to the |
712 | next, in an attempt to find where to configure the environment for a local |
713 | library installation: L</resolve_empty_path>, L</resolve_home_path>, |
714 | L</resolve_relative_path>. Passes the given path argument to |
715 | L</resolve_empty_path> which then returns a result that is passed to |
716 | L</resolve_home_path>, which then has its result passed to |
717 | L</resolve_relative_path>. The result of this final call is returned from |
718 | L</resolve_path>. |
719 | |
720 | =head1 A WARNING ABOUT UNINST=1 |
721 | |
722 | Be careful about using local::lib in combination with "make install UNINST=1". |
723 | The idea of this feature is that will uninstall an old version of a module |
724 | before installing a new one. However it lacks a safety check that the old |
725 | version and the new version will go in the same directory. Used in combination |
726 | with local::lib, you can potentially delete a globally accessible version of a |
727 | module while installing the new version in a local place. Only combine "make |
728 | install UNINST=1" and local::lib if you understand these possible consequences. |
729 | |
730 | =head1 LIMITATIONS |
731 | |
732 | Rather basic shell detection. Right now anything with csh in its name is |
733 | assumed to be a C shell or something compatible, and everything else is assumed |
734 | to be Bourne, except on Win32 systems. If the C<SHELL> environment variable is |
735 | not set, a Bourne-compatible shell is assumed. |
736 | |
737 | Bootstrap is a hack and will use CPAN.pm for ExtUtils::MakeMaker even if you |
738 | have CPANPLUS installed. |
739 | |
740 | Kills any existing PERL5LIB, PERL_MM_OPT or MODULEBUILDRC. |
741 | |
742 | Should probably auto-fixup CPAN config if not already done. |
743 | |
744 | Patches very much welcome for any of the above. |
745 | |
746 | On Win32 systems, does not have a way to write the created environment variables |
747 | to the registry, so that they can persist through a reboot. |
748 | |
749 | =head1 TROUBLESHOOTING |
750 | |
751 | If you've configured local::lib to install CPAN modules somewhere in to your |
752 | home directory, and at some point later you try to install a module with C<cpan |
753 | -i Foo::Bar>, but it fails with an error like: C<Warning: You do not have |
754 | permissions to install into /usr/lib64/perl5/site_perl/5.8.8/x86_64-linux at |
755 | /usr/lib64/perl5/5.8.8/Foo/Bar.pm> and buried within the install log is an |
756 | error saying C<'INSTALL_BASE' is not a known MakeMaker parameter name>, then |
757 | you've somehow lost your updated ExtUtils::MakeMaker module. |
758 | |
759 | To remedy this situation, rerun the bootstrapping procedure documented above. |
760 | |
761 | Then, run C<rm -r ~/.cpan/build/Foo-Bar*> |
762 | |
763 | Finally, re-run C<cpan -i Foo::Bar> and it should install without problems. |
764 | |
765 | =head1 ENVIRONMENT |
766 | |
767 | =over 4 |
768 | |
769 | =item SHELL |
770 | |
771 | =item COMSPEC |
772 | |
773 | local::lib looks at the user's C<SHELL> environment variable when printing out |
774 | commands to add to the shell configuration file. |
775 | |
776 | On Win32 systems, C<COMSPEC> is also examined. |
777 | |
778 | =back |
779 | |
780 | =head1 AUTHOR |
781 | |
782 | Matt S Trout <mst@shadowcat.co.uk> http://www.shadowcat.co.uk/ |
783 | |
784 | auto_install fixes kindly sponsored by http://www.takkle.com/ |
785 | |
786 | =head1 CONTRIBUTORS |
787 | |
788 | Chris Nehren <apeiron@cpan.org> now oversees maintenance of local::lib, in |
789 | addition to providing doc patches and bootstrap fixes to prevent users from |
790 | shooting themselves in the foot (it's more likely than you think). |
791 | |
792 | Patches to correctly output commands for csh style shells, as well as some |
793 | documentation additions, contributed by Christopher Nehren <apeiron@cpan.org>. |
794 | |
795 | '--self-contained' feature contributed by Mark Stosberg <mark@summersault.com>. |
796 | |
797 | Ability to pass '--self-contained' without a directory inspired by frew on |
798 | irc.perl.org/#catalyst. |
799 | |
800 | Doc patches for a custom local::lib directory contributed by Torsten Raudssus |
801 | <torsten@raudssus.de>. |
802 | |
803 | Hans Dieter Pearcey <hdp@cpan.org> sent in some additional tests for ensuring |
804 | things will install properly, submitted a fix for the bug causing problems with |
805 | writing Makefiles during bootstrapping, contributed an example program, and |
806 | submitted yet another fix to ensure that local::lib can install and bootstrap |
807 | properly. Many, many thanks! |
808 | |
809 | pattern of Freenode IRC contributed the beginnings of the Troubleshooting |
810 | section. Many thanks! |
811 | |
812 | Patch to add Win32 support contributed by Curtis Jewell <csjewell@cpan.org>. |
813 | |
814 | kgish/#perl-help@irc.perl.org suggested revamping the section on sourcing the |
815 | shell file to make it clearer to those quickly reading the POD. |
816 | |
817 | t0m and chrisa on #local-lib@irc.perl.org pointed out a PERL5LIB ordering issue |
818 | with C<--self-contained>. |
819 | |
820 | =head1 COPYRIGHT |
821 | |
822 | Copyright (c) 2007 - 2009 the local::lib L</AUTHOR> and L</CONTRIBUTORS> as |
823 | listed above. |
824 | |
825 | =head1 LICENSE |
826 | |
827 | This library is free software and may be distributed under the same terms |
828 | as perl itself. |
829 | |
830 | =cut |
831 | |
832 | 1; |