don't try to create paths if we are deactivating

[p5sagit/local-lib.git] / lib / local / lib.pm

diff --git a/lib/local/lib.pm b/lib/local/lib.pm
index 440757a..5741fa1 100644 (file)
--- a/lib/local/lib.pm
+++ b/lib/local/lib.pm
@@ -3,14 +3,14 @@ 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 5.006;
 
 use File::Spec ();
 use File::Path ();
 use Config;
 
-our $VERSION = '1.008011'; # 1.8.11
+our $VERSION = '1.008026'; # 1.8.26
+$VERSION = eval $VERSION;
 
 our @KNOWN_FLAGS = qw(--self-contained --deactivate --deactivate-all);
 
@@ -208,7 +208,8 @@ sub setup_local_lib_for {
   my $interpolate = LITERAL_ENV;
   my @active_lls = $class->active_paths;
 
-  $class->ensure_dir_structure_for($path);
+  $class->ensure_dir_structure_for($path)
+    unless $deactivating;
 
   # On Win32 directories often contain spaces. But some parts of the CPAN
   # toolchain don't like that. To avoid this, GetShortPathName() gives us
@@ -217,7 +218,7 @@ sub setup_local_lib_for {
   $path = Win32::GetShortPathName($path) if $^O eq 'MSWin32';
 
   if (! $deactivating) {
-    if (@active_lls && $active_lls[-1] eq $path) {
+    if (@active_lls && $active_lls[0] eq $path) {
       exit 0 if $0 eq '-';
       return; # Asked to add what's already at the top of the stack
     } elsif (grep { $_ eq $path} @active_lls) {
@@ -344,7 +345,7 @@ sub build_bourne_env_declaration {
 sub build_csh_env_declaration {
   my $class = shift;
   my($name, $value) = @_;
-  return defined($value) ? qq{setenv ${name} "${value}"\n} : qq{unsetenv ${name}\n};
+  return defined($value) ? qq{setenv ${name} "${value}";\n} : qq{unsetenv ${name};\n};
 }
 
 sub build_win32_env_declaration {
@@ -420,11 +421,11 @@ sub build_activate_environment_vars_for {
     PERL_LOCAL_LIB_ROOT =>
             _env_list_value(
               { interpolate => $interpolate, exists => 0, empty => '' },
-              \'PERL_LOCAL_LIB_ROOT',
               $path,
+              \'PERL_LOCAL_LIB_ROOT',
             ),
-    PERL_MB_OPT => "--install_base ${path}",
-    PERL_MM_OPT => "INSTALL_BASE=${path}",
+    PERL_MB_OPT => "--install_base " . _mb_escape_path($path),
+    PERL_MM_OPT => "INSTALL_BASE=" . _mm_escape_path($path),
     PERL5LIB =>
             _env_list_value(
               { interpolate => $interpolate, exists => 0, empty => '' },
@@ -439,11 +440,33 @@ sub build_activate_environment_vars_for {
   )
 }
 
+sub _mm_escape_path {
+  my $path = shift;
+  $path =~ s/\\/\\\\\\\\/g;
+  if ($path =~ s/ /\\ /g) {
+    $path = qq{"\\"$path\\""};
+  }
+  return $path;
+}
+
+sub _mb_escape_path {
+  my $path = shift;
+  $path =~ s/\\/\\\\/g;
+  return qq{"$path"};
+}
+
 sub active_paths {
   my ($class) = @_;
 
   return () unless defined $ENV{PERL_LOCAL_LIB_ROOT};
-  return grep { $_ ne '' } split /\Q$Config{path_sep}/, $ENV{PERL_LOCAL_LIB_ROOT};
+
+  return grep {
+    # screen out entries that aren't actually reflected in @INC
+    my $active_ll = $class->install_base_perl_path($_);
+    grep { $_ eq $active_ll } @INC
+  }
+  grep { $_ ne '' }
+  split /\Q$Config{path_sep}\E/, $ENV{PERL_LOCAL_LIB_ROOT};
 }
 
 sub build_deactivate_environment_vars_for {
@@ -488,10 +511,10 @@ sub build_deactivate_environment_vars_for {
 
   # If removing ourselves from the "top of the stack", set install paths to
   # correspond with the new top of stack.
-  if ($active_lls[-1] eq $path) {
-    my $new_top = $active_lls[-2];
-    $env{PERL_MB_OPT} = defined($new_top) ? "--install_base ${new_top}" : undef;
-    $env{PERL_MM_OPT} = defined($new_top) ? "INSTALL_BASE=${new_top}" : undef;
+  if ($active_lls[0] eq $path) {
+    my $new_top = $active_lls[1];
+    $env{PERL_MB_OPT} = defined($new_top) ? "--install_base "._mb_escape_path($new_top) : undef;
+    $env{PERL_MM_OPT} = defined($new_top) ? "INSTALL_BASE="._mm_escape_path($new_top) : undef;
   }
 
   return %env;
@@ -586,7 +609,7 @@ A typical way to install local::lib is using what is known as the
 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
+Even 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.
@@ -857,7 +880,8 @@ L</build_environment_vars_for>.
 =back
 
 Returns a list of active C<local::lib> paths, according to the
-C<PERL_LOCAL_LIB_ROOT> environment variable.
+C<PERL_LOCAL_LIB_ROOT> environment variable and verified against
+what is really in C<@INC>.
 
 =head2 install_base_perl_path
 
@@ -1097,8 +1121,8 @@ listed above.
 
 =head1 LICENSE
 
-This library is free software and may be distributed under the same terms
-as perl itself.
+This is free software; you can redistribute it and/or modify it under
+the same terms as the Perl 5 programming language system itself.
 
 =cut