Better setting of environment

1 files changed, 844 insertions, 0 deletions

diff --git a/perl-external/lib/perl5/local/lib.pm b/perl-external/lib/perl5/local/lib.pm
new file mode 100644
index 000000000..65e5365a6
--- /dev/null
+++ b/perl-external/lib/perl5/local/lib.pm
@@ -0,0 +1,844 @@
+use strict;
+use warnings;
+
+package local::lib;
+
+use 5.008001; # probably works with earlier versions but I'm not supporting them
+              # (patches would, of course, be welcome)
+
+use File::Spec ();
+use File::Path ();
+use Carp ();
+use Config;
+
+our $VERSION = '1.008001'; # 1.8.1
+
+our @KNOWN_FLAGS = qw(--self-contained);
+
+sub import {
+  my ($class, @args) = @_;
+
+  # Remember what PERL5LIB was when we started
+  my $perl5lib = $ENV{PERL5LIB} || '';
+
+  my %arg_store;
+  for my $arg (@args) {
+    # check for lethal dash first to stop processing before causing problems
+    if ($arg =~ /−/) {
+      die <<'DEATH';
+WHOA THERE! It looks like you've got some fancy dashes in your commandline!
+These are *not* the traditional -- dashes that software recognizes. You
+probably got these by copy-pasting from the perldoc for this module as
+rendered by a UTF8-capable formatter. This most typically happens on an OS X
+terminal, but can happen elsewhere too. Please try again after replacing the
+dashes with normal minus signs.
+DEATH
+    }
+    elsif(grep { $arg eq $_ } @KNOWN_FLAGS) {
+      (my $flag = $arg) =~ s/--//;
+      $arg_store{$flag} = 1;
+    }
+    elsif($arg =~ /^--/) {
+      die "Unknown import argument: $arg";
+    }
+    else {
+      # assume that what's left is a path
+      $arg_store{path} = $arg;
+    }
+  }
+
+  if($arg_store{'self-contained'}) {
+    die "FATAL: The local::lib --self-contained flag has never worked reliably and the original author, Mark Stosberg, was unable or unwilling to maintain it. As such, this flag has been removed from the local::lib codebase in order to prevent misunderstandings and potentially broken builds. The local::lib authors recommend that you look at the lib::core::only module shipped with this distribution in order to create a more robust environment that is equivalent to what --self-contained provided (although quite possibly not what you originally thought it provided due to the poor quality of the documentation, for which we apologise).\n";
+  }
+
+  $arg_store{path} = $class->resolve_path($arg_store{path});
+  $class->setup_local_lib_for($arg_store{path});
+
+  for (@INC) { # Untaint @INC
+    next if ref; # Skip entry if it is an ARRAY, CODE, blessed, etc.
+    m/(.*)/ and $_ = $1;
+  }
+}
+
+sub pipeline;
+
+sub pipeline {
+  my @methods = @_;
+  my $last = pop(@methods);
+  if (@methods) {
+    \sub {
+      my ($obj, @args) = @_;
+      $obj->${pipeline @methods}(
+        $obj->$last(@args)
+      );
+    };
+  } else {
+    \sub {
+      shift->$last(@_);
+    };
+  }
+}
+
+=begin testing
+
+#:: test pipeline
+
+package local::lib;
+
+{ package Foo; sub foo { -$_[1] } sub bar { $_[1]+2 } sub baz { $_[1]+3 } }
+my $foo = bless({}, 'Foo');                                                 
+Test::More::ok($foo->${pipeline qw(foo bar baz)}(10) == -15);
+
+=end testing
+
+=cut
+
+sub _uniq {
+    my %seen;
+    grep { ! $seen{$_}++ } @_;
+}
+
+sub resolve_path {
+  my ($class, $path) = @_;
+  $class->${pipeline qw(
+    resolve_relative_path
+    resolve_home_path
+    resolve_empty_path
+  )}($path);
+}
+
+sub resolve_empty_path {
+  my ($class, $path) = @_;
+  if (defined $path) {
+    $path;
+  } else {
+    '~/perl5';
+  }
+}
+
+=begin testing
+
+#:: test classmethod setup
+
+my $c = 'local::lib';
+
+=end testing
+
+=begin testing
+
+#:: test classmethod
+
+is($c->resolve_empty_path, '~/perl5');
+is($c->resolve_empty_path('foo'), 'foo');
+
+=end testing
+
+=cut
+
+sub resolve_home_path {
+  my ($class, $path) = @_;
+  return $path unless ($path =~ /^~/);
+  my ($user) = ($path =~ /^~([^\/]+)/); # can assume ^~ so undef for 'us'
+  my $tried_file_homedir;
+  my $homedir = do {
+    if (eval { require File::HomeDir } && $File::HomeDir::VERSION >= 0.65) {
+      $tried_file_homedir = 1;
+      if (defined $user) {
+        File::HomeDir->users_home($user);
+      } else {
+        File::HomeDir->my_home;
+      }
+    } else {
+      if (defined $user) {
+        (getpwnam $user)[7];
+      } else {
+        if (defined $ENV{HOME}) {
+          $ENV{HOME};
+        } else {
+          (getpwuid $<)[7];
+        }
+      }
+    }
+  };
+  unless (defined $homedir) {
+    Carp::croak(
+      "Couldn't resolve homedir for "
+      .(defined $user ? $user : 'current user')
+      .($tried_file_homedir ? '' : ' - consider installing File::HomeDir')
+    );
+  }
+  $path =~ s/^~[^\/]*/$homedir/;
+  $path;
+}
+
+sub resolve_relative_path {
+  my ($class, $path) = @_;
+  $path = File::Spec->rel2abs($path);
+}
+
+=begin testing
+
+#:: test classmethod
+
+local *File::Spec::rel2abs = sub { shift; 'FOO'.shift; };
+is($c->resolve_relative_path('bar'),'FOObar');
+
+=end testing
+
+=cut
+
+sub setup_local_lib_for {
+  my ($class, $path) = @_;
+  $path = $class->ensure_dir_structure_for($path);
+  if ($0 eq '-') {
+    $class->print_environment_vars_for($path);
+    exit 0;
+  } else {
+    $class->setup_env_hash_for($path);
+    @INC = _uniq(split($Config{path_sep}, $ENV{PERL5LIB}), @INC);
+  }
+}
+
+sub install_base_bin_path {
+  my ($class, $path) = @_;
+  File::Spec->catdir($path, 'bin');
+}
+
+sub install_base_perl_path {
+  my ($class, $path) = @_;
+  File::Spec->catdir($path, 'lib', 'perl5');
+}
+
+sub install_base_arch_path {
+  my ($class, $path) = @_;
+  File::Spec->catdir($class->install_base_perl_path($path), $Config{archname});
+}
+
+sub ensure_dir_structure_for {
+  my ($class, $path) = @_;
+  unless (-d $path) {
+    warn "Attempting to create directory ${path}\n";
+  }
+  File::Path::mkpath($path);
+  # Need to have the path exist to make a short name for it, so
+  # converting to a short name here.
+  $path = Win32::GetShortPathName($path) if $^O eq 'MSWin32';
+
+  return $path;
+}
+
+sub INTERPOLATE_ENV () { 1 }
+sub LITERAL_ENV     () { 0 }
+
+sub guess_shelltype {
+  my $shellbin = 'sh';
+  if(defined $ENV{'SHELL'}) {
+      my @shell_bin_path_parts = File::Spec->splitpath($ENV{'SHELL'});
+      $shellbin = $shell_bin_path_parts[-1];
+  }
+  my $shelltype = do {
+      local $_ = $shellbin;
+      if(/csh/) {
+          'csh'
+      } else {
+          'bourne'
+      }
+  };
+
+  # Both Win32 and Cygwin have $ENV{COMSPEC} set.
+  if (defined $ENV{'COMSPEC'} && $^O ne 'cygwin') {
+      my @shell_bin_path_parts = File::Spec->splitpath($ENV{'COMSPEC'});
+      $shellbin = $shell_bin_path_parts[-1];
+         $shelltype = do {
+                 local $_ = $shellbin;
+                 if(/command\.com/) {
+                         'win32'
+                 } elsif(/cmd\.exe/) {
+                         'win32'
+                 } elsif(/4nt\.exe/) {
+                         'win32'
+                 } else {
+                         $shelltype
+                 }
+         };
+  }
+  return $shelltype;
+}
+
+sub print_environment_vars_for {
+  my ($class, $path) = @_;
+  print $class->environment_vars_string_for($path);
+}
+
+sub environment_vars_string_for {
+  my ($class, $path) = @_;
+  my @envs = $class->build_environment_vars_for($path, LITERAL_ENV);
+  my $out = '';
+
+  # rather basic csh detection, goes on the assumption that something won't
+  # call itself csh unless it really is. also, default to bourne in the
+  # pathological situation where a user doesn't have $ENV{SHELL} defined.
+  # note also that shells with funny names, like zoid, are assumed to be
+  # bourne.
+
+  my $shelltype = $class->guess_shelltype;
+
+  while (@envs) {
+    my ($name, $value) = (shift(@envs), shift(@envs));
+    $value =~ s/(\\")/\\$1/g;
+    $out .= $class->${\"build_${shelltype}_env_declaration"}($name, $value);
+  }
+  return $out;
+}
+
+# simple routines that take two arguments: an %ENV key and a value. return
+# strings that are suitable for passing directly to the relevant shell to set
+# said key to said value.
+sub build_bourne_env_declaration {
+  my $class = shift;
+  my($name, $value) = @_;
+  return qq{export ${name}="${value}"\n};
+}
+
+sub build_csh_env_declaration {
+  my $class = shift;
+  my($name, $value) = @_;
+  return qq{setenv ${name} "${value}"\n};
+}
+
+sub build_win32_env_declaration {
+  my $class = shift;
+  my($name, $value) = @_;
+  return qq{set ${name}=${value}\n};
+}
+
+sub setup_env_hash_for {
+  my ($class, $path) = @_;
+  my %envs = $class->build_environment_vars_for($path, INTERPOLATE_ENV);
+  @ENV{keys %envs} = values %envs;
+}
+
+sub build_environment_vars_for {
+  my ($class, $path, $interpolate) = @_;
+  return (
+    PERL_LOCAL_LIB_ROOT => $path,
+    PERL_MB_OPT => "--install_base ${path}",
+    PERL_MM_OPT => "INSTALL_BASE=${path}",
+    PERL5LIB => join($Config{path_sep},
+                  $class->install_base_arch_path($path),
+                  $class->install_base_perl_path($path),
+                  (($ENV{PERL5LIB}||()) ?
+                    ($interpolate == INTERPOLATE_ENV
+                      ? ($ENV{PERL5LIB})
+                      : (($^O ne 'MSWin32') ? '$PERL5LIB' : '%PERL5LIB%' ))
+                    : ())
+                ),
+    PATH => join($Config{path_sep},
+              $class->install_base_bin_path($path),
+              ($interpolate == INTERPOLATE_ENV
+                ? ($ENV{PATH}||())
+                : (($^O ne 'MSWin32') ? '$PATH' : '%PATH%' ))
+             ),
+  )
+}
+
+=begin testing
+
+#:: test classmethod
+
+File::Path::rmtree('t/var/splat');
+
+$c->ensure_dir_structure_for('t/var/splat');
+
+ok(-d 't/var/splat');
+
+=end testing
+
+=encoding utf8
+
+=head1 NAME
+
+local::lib - create and use a local lib/ for perl modules with PERL5LIB
+
+=head1 SYNOPSIS
+
+In code -
+
+  use local::lib; # sets up a local lib at ~/perl5
+
+  use local::lib '~/foo'; # same, but ~/foo
+
+  # Or...
+  use FindBin;
+  use local::lib "$FindBin::Bin/../support";  # app-local support library
+
+From the shell -
+
+  # Install LWP and its missing dependencies to the '~/perl5' directory
+  perl -MCPAN -Mlocal::lib -e 'CPAN::install(LWP)'
+
+  # Just print out useful shell commands
+  $ perl -Mlocal::lib
+  export PERL_MB_OPT='--install_base /home/username/perl5'
+  export PERL_MM_OPT='INSTALL_BASE=/home/username/perl5'
+  export PERL5LIB='/home/username/perl5/lib/perl5/i386-linux:/home/username/perl5/lib/perl5'
+  export PATH="/home/username/perl5/bin:$PATH"
+
+=head2 The bootstrapping technique
+
+A typical way to install local::lib is using what is known as the
+"bootstrapping" technique.  You would do this if your system administrator
+hasn't already installed local::lib.  In this case, you'll need to install
+local::lib in your home directory. 
+
+If you do have administrative privileges, you will still want to set up your 
+environment variables, as discussed in step 4. Without this, you would still
+install the modules into the system CPAN installation and also your Perl scripts
+will not use the lib/ path you bootstrapped with local::lib.
+
+By default local::lib installs itself and the CPAN modules into ~/perl5.
+
+Windows users must also see L</Differences when using this module under Win32>.
+
+1. Download and unpack the local::lib tarball from CPAN (search for "Download"
+on the CPAN page about local::lib).  Do this as an ordinary user, not as root
+or administrator.  Unpack the file in your home directory or in any other
+convenient location.
+
+2. Run this:
+
+  perl Makefile.PL --bootstrap
+
+If the system asks you whether it should automatically configure as much
+as possible, you would typically answer yes.
+
+In order to install local::lib into a directory other than the default, you need
+to specify the name of the directory when you call bootstrap, as follows:
+
+  perl Makefile.PL --bootstrap=~/foo
+
+3. Run this: (local::lib assumes you have make installed on your system)
+
+  make test && make install
+
+4. Now we need to setup the appropriate environment variables, so that Perl 
+starts using our newly generated lib/ directory. If you are using bash or
+any other Bourne shells, you can add this to your shell startup script this
+way:
+
+  echo 'eval $(perl -I$HOME/perl5/lib/perl5 -Mlocal::lib)' >>~/.bashrc
+
+If you are using C shell, you can do this as follows:
+
+  /bin/csh
+  echo $SHELL
+  /bin/csh
+  perl -I$HOME/perl5/lib/perl5 -Mlocal::lib >> ~/.cshrc
+
+If you passed to bootstrap a directory other than default, you also need to give that as 
+import parameter to the call of the local::lib module like this way:
+
+  echo 'eval $(perl -I$HOME/foo/lib/perl5 -Mlocal::lib=$HOME/foo)' >>~/.bashrc
+
+After writing your shell configuration file, be sure to re-read it to get the
+changed settings into your current shell's environment. Bourne shells use 
+C<. ~/.bashrc> for this, whereas C shells use C<source ~/.cshrc>.
+
+If you're on a slower machine, or are operating under draconian disk space
+limitations, you can disable the automatic generation of manpages from POD when
+installing modules by using the C<--no-manpages> argument when bootstrapping:
+
+  perl Makefile.PL --bootstrap --no-manpages
+
+To avoid doing several bootstrap for several Perl module environments on the 
+same account, for example if you use it for several different deployed 
+applications independently, you can use one bootstrapped local::lib 
+installation to install modules in different directories directly this way:
+
+  cd ~/mydir1
+  perl -Mlocal::lib=./
+  eval $(perl -Mlocal::lib=./)  ### To set the environment for this shell alone
+  printenv                      ### You will see that ~/mydir1 is in the PERL5LIB
+  perl -MCPAN -e install ...    ### whatever modules you want
+  cd ../mydir2
+  ... REPEAT ...
+
+For multiple environments for multiple apps you may need to include a modified
+version of the C<< use FindBin >> instructions in the "In code" sample above.
+If you did something like the above, you have a set of Perl modules at C<<
+~/mydir1/lib >>. If you have a script at C<< ~/mydir1/scripts/myscript.pl >>,
+you need to tell it where to find the modules you installed for it at C<<
+~/mydir1/lib >>.
+
+In C<< ~/mydir1/scripts/myscript.pl >>:
+
+  use strict;
+  use warnings;
+  use local::lib "$FindBin::Bin/..";  ### points to ~/mydir1 and local::lib finds lib
+  use lib "$FindBin::Bin/../lib";     ### points to ~/mydir1/lib
+
+Put this before any BEGIN { ... } blocks that require the modules you installed.
+
+=head2 Differences when using this module under Win32
+
+To set up the proper environment variables for your current session of
+C<CMD.exe>, you can use this:
+
+  C:\>perl -Mlocal::lib
+  set PERL_MB_OPT=--install_base C:\DOCUME~1\ADMINI~1\perl5
+  set PERL_MM_OPT=INSTALL_BASE=C:\DOCUME~1\ADMINI~1\perl5
+  set PERL5LIB=C:\DOCUME~1\ADMINI~1\perl5\lib\perl5;C:\DOCUME~1\ADMINI~1\perl5\lib\perl5\MSWin32-x86-multi-thread
+  set PATH=C:\DOCUME~1\ADMINI~1\perl5\bin;%PATH%
+  
+  ### To set the environment for this shell alone
+  C:\>perl -Mlocal::lib > %TEMP%\tmp.bat && %TEMP%\tmp.bat && del %TEMP%\temp.bat
+  ### instead of $(perl -Mlocal::lib=./)
+
+If you want the environment entries to persist, you'll need to add then to the
+Control Panel's System applet yourself or use L<App::local::lib::Win32Helper>.
+
+The "~" is translated to the user's profile directory (the directory named for
+the user under "Documents and Settings" (Windows XP or earlier) or "Users"
+(Windows Vista or later)) unless $ENV{HOME} exists. After that, the home
+directory is translated to a short name (which means the directory must exist)
+and the subdirectories are created.
+
+=head1 RATIONALE
+
+The version of a Perl package on your machine is not always the version you
+need.  Obviously, the best thing to do would be to update to the version you
+need.  However, you might be in a situation where you're prevented from doing
+this.  Perhaps you don't have system administrator privileges; or perhaps you
+are using a package management system such as Debian, and nobody has yet gotten
+around to packaging up the version you need.
+
+local::lib solves this problem by allowing you to create your own directory of
+Perl packages downloaded from CPAN (in a multi-user system, this would typically
+be within your own home directory).  The existing system Perl installation is
+not affected; you simply invoke Perl with special options so that Perl uses the
+packages in your own local package directory rather than the system packages.
+local::lib arranges things so that your locally installed version of the Perl
+packages takes precedence over the system installation.
+
+If you are using a package management system (such as Debian), you don't need to
+worry about Debian and CPAN stepping on each other's toes.  Your local version
+of the packages will be written to an entirely separate directory from those
+installed by Debian.  
+
+=head1 DESCRIPTION
+
+This module provides a quick, convenient way of bootstrapping a user-local Perl
+module library located within the user's home directory. It also constructs and
+prints out for the user the list of environment variables using the syntax
+appropriate for the user's current shell (as specified by the C<SHELL>
+environment variable), suitable for directly adding to one's shell
+configuration file.
+
+More generally, local::lib allows for the bootstrapping and usage of a
+directory containing Perl modules outside of Perl's C<@INC>. This makes it
+easier to ship an application with an app-specific copy of a Perl module, or
+collection of modules. Useful in cases like when an upstream maintainer hasn't
+applied a patch to a module of theirs that you need for your application.
+
+On import, local::lib sets the following environment variables to appropriate
+values:
+
+=over 4
+
+=item PERL_MB_OPT
+
+=item PERL_MM_OPT
+
+=item PERL5LIB
+
+=item PATH
+
+PATH is appended to, rather than clobbered.
+
+=back
+
+These values are then available for reference by any code after import.
+
+=head1 CREATING A SELF-CONTAINED SET OF MODULES
+
+See L<lib::core::only> for one way to do this - but note that
+there are a number of caveats, and the best approach is always to perform a
+build against a clean perl (i.e. site and vendor as close to empty as possible).
+
+=head1 METHODS
+
+=head2 ensure_dir_structure_for
+
+=over 4
+
+=item Arguments: $path
+
+=item Return value: None
+
+=back
+
+Attempts to create the given path, and all required parent directories. Throws
+an exception on failure.
+
+=head2 print_environment_vars_for
+
+=over 4
+
+=item Arguments: $path
+
+=item Return value: None
+
+=back
+
+Prints to standard output the variables listed above, properly set to use the
+given path as the base directory.
+
+=head2 build_environment_vars_for
+
+=over 4
+
+=item Arguments: $path, $interpolate
+
+=item Return value: \%environment_vars
+
+=back
+
+Returns a hash with the variables listed above, properly set to use the
+given path as the base directory.
+
+=head2 setup_env_hash_for
+
+=over 4
+
+=item Arguments: $path
+
+=item Return value: None
+
+=back
+
+Constructs the C<%ENV> keys for the given path, by calling
+L</build_environment_vars_for>.
+
+=head2 install_base_perl_path
+
+=over 4
+
+=item Arguments: $path
+
+=item Return value: $install_base_perl_path
+
+=back
+
+Returns a path describing where to install the Perl modules for this local
+library installation. Appends the directories C<lib> and C<perl5> to the given
+path.
+
+=head2 install_base_arch_path
+
+=over 4
+
+=item Arguments: $path
+
+=item Return value: $install_base_arch_path
+
+=back
+
+Returns a path describing where to install the architecture-specific Perl
+modules for this local library installation. Based on the
+L</install_base_perl_path> method's return value, and appends the value of
+C<$Config{archname}>.
+
+=head2 install_base_bin_path
+
+=over 4
+
+=item Arguments: $path
+
+=item Return value: $install_base_bin_path
+
+=back
+
+Returns a path describing where to install the executable programs for this
+local library installation. Based on the L</install_base_perl_path> method's
+return value, and appends the directory C<bin>.
+
+=head2 resolve_empty_path
+
+=over 4
+
+=item Arguments: $path
+
+=item Return value: $base_path
+
+=back
+
+Builds and returns the base path into which to set up the local module
+installation. Defaults to C<~/perl5>.
+
+=head2 resolve_home_path
+
+=over 4
+
+=item Arguments: $path
+
+=item Return value: $home_path
+
+=back
+
+Attempts to find the user's home directory. If installed, uses C<File::HomeDir>
+for this purpose. If no definite answer is available, throws an exception.
+
+=head2 resolve_relative_path
+
+=over 4
+
+=item Arguments: $path
+
+=item Return value: $absolute_path
+
+=back
+
+Translates the given path into an absolute path.
+
+=head2 resolve_path
+
+=over 4
+
+=item Arguments: $path
+
+=item Return value: $absolute_path
+
+=back
+
+Calls the following in a pipeline, passing the result from the previous to the
+next, in an attempt to find where to configure the environment for a local
+library installation: L</resolve_empty_path>, L</resolve_home_path>,
+L</resolve_relative_path>. Passes the given path argument to
+L</resolve_empty_path> which then returns a result that is passed to
+L</resolve_home_path>, which then has its result passed to
+L</resolve_relative_path>. The result of this final call is returned from
+L</resolve_path>.
+
+=head1 A WARNING ABOUT UNINST=1
+
+Be careful about using local::lib in combination with "make install UNINST=1".
+The idea of this feature is that will uninstall an old version of a module
+before installing a new one. However it lacks a safety check that the old
+version and the new version will go in the same directory. Used in combination
+with local::lib, you can potentially delete a globally accessible version of a
+module while installing the new version in a local place. Only combine "make
+install UNINST=1" and local::lib if you understand these possible consequences.
+
+=head1 LIMITATIONS
+
+The perl toolchain is unable to handle directory names with spaces in it,
+so you cant put your local::lib bootstrap into a directory with spaces. What
+you can do is moving your local::lib to a directory with spaces B<after> you
+installed all modules inside your local::lib bootstrap. But be aware that you
+cant update or install CPAN modules after the move.
+
+Rather basic shell detection. Right now anything with csh in its name is
+assumed to be a C shell or something compatible, and everything else is assumed
+to be Bourne, except on Win32 systems. If the C<SHELL> environment variable is
+not set, a Bourne-compatible shell is assumed.
+
+Bootstrap is a hack and will use CPAN.pm for ExtUtils::MakeMaker even if you
+have CPANPLUS installed.
+
+Kills any existing PERL5LIB, PERL_MM_OPT or PERL_MB_OPT.
+
+Should probably auto-fixup CPAN config if not already done.
+
+Patches very much welcome for any of the above.
+
+On Win32 systems, does not have a way to write the created environment variables
+to the registry, so that they can persist through a reboot.
+
+=head1 TROUBLESHOOTING
+
+If you've configured local::lib to install CPAN modules somewhere in to your
+home directory, and at some point later you try to install a module with C<cpan
+-i Foo::Bar>, but it fails with an error like: C<Warning: You do not have
+permissions to install into /usr/lib64/perl5/site_perl/5.8.8/x86_64-linux at
+/usr/lib64/perl5/5.8.8/Foo/Bar.pm> and buried within the install log is an
+error saying C<'INSTALL_BASE' is not a known MakeMaker parameter name>, then
+you've somehow lost your updated ExtUtils::MakeMaker module.
+
+To remedy this situation, rerun the bootstrapping procedure documented above.
+
+Then, run C<rm -r ~/.cpan/build/Foo-Bar*>
+
+Finally, re-run C<cpan -i Foo::Bar> and it should install without problems.
+
+=head1 ENVIRONMENT
+
+=over 4
+
+=item SHELL
+
+=item COMSPEC
+
+local::lib looks at the user's C<SHELL> environment variable when printing out
+commands to add to the shell configuration file.
+
+On Win32 systems, C<COMSPEC> is also examined.
+
+=back
+
+=head1 SUPPORT
+
+IRC:
+
+    Join #local-lib on irc.perl.org.
+
+=head1 AUTHOR
+
+Matt S Trout <mst@shadowcat.co.uk> http://www.shadowcat.co.uk/
+
+auto_install fixes kindly sponsored by http://www.takkle.com/
+
+=head1 CONTRIBUTORS
+
+Patches to correctly output commands for csh style shells, as well as some
+documentation additions, contributed by Christopher Nehren <apeiron@cpan.org>.
+
+Doc patches for a custom local::lib directory, more cleanups in the english
+documentation and a L<german documentation|POD2::DE::local::lib> contributed by Torsten Raudssus
+<torsten@raudssus.de>.
+
+Hans Dieter Pearcey <hdp@cpan.org> sent in some additional tests for ensuring
+things will install properly, submitted a fix for the bug causing problems with
+writing Makefiles during bootstrapping, contributed an example program, and
+submitted yet another fix to ensure that local::lib can install and bootstrap
+properly. Many, many thanks!
+
+pattern of Freenode IRC contributed the beginnings of the Troubleshooting
+section. Many thanks!
+
+Patch to add Win32 support contributed by Curtis Jewell <csjewell@cpan.org>.
+
+Warnings for missing PATH/PERL5LIB (as when not running interactively) silenced
+by a patch from Marco Emilio Poleggi.
+
+Mark Stosberg <mark@summersault.com> provided the code for the now deleted
+'--self-contained' option.
+
+Documentation patches to make win32 usage clearer by
+David Mertens <dcmertens.perl@gmail.com> (run4flat).
+
+Brazilian L<portuguese translation|POD2::PT_BR::local::lib> and minor doc patches contributed by Breno
+G. de Oliveira <garu@cpan.org>.
+
+=head1 COPYRIGHT
+
+Copyright (c) 2007 - 2010 the local::lib L</AUTHOR> and L</CONTRIBUTORS> as
+listed above.
+
+=head1 LICENSE
+
+This library is free software and may be distributed under the same terms
+as perl itself.
+
+=cut
+
+1;