Add a file utils/cpan.PL to generate the "cpan" utility,

also separately maintained on CPAN, and now moved as
lib/CPAN/bin/cpan. Tweak installperl to avoid installing
this last file.

p4raw-id: //depot/perl@19065

1 files changed, 48 insertions, 0 deletions

diff --git a/utils/cpan.PL b/utils/cpan.PL
new file mode 100644
index 0000000000..5e12d78d6f
--- /dev/null
+++ b/utils/cpan.PL
@@ -0,0 +1,48 @@
+#!/usr/local/bin/perl
+
+use Config;
+use File::Basename qw(&basename &dirname);
+use Cwd;
+
+# List explicitly here the variables you want Configure to
+# generate.  Metaconfig only looks for shell variables, so you
+# have to mention them as if they were shell variables, not
+# %Config entries.  Thus you write
+#  $startperl
+# to ensure Configure will look for $Config{startperl}.
+
+# This forces PL files to create target in same directory as PL file.
+# This is so that make depend always knows where to find PL derivatives.
+my $origdir = cwd;
+chdir dirname($0);
+my $file = basename($0, '.PL');
+$file .= '.com' if $^O eq 'VMS';
+
+open OUT,">$file" or die "Can't create $file: $!";
+
+print "Extracting $file (with variable substitutions)\n";
+
+# In this section, perl variables will be expanded during extraction.
+# You can use $Config{...} to use Configure variables.
+
+print OUT <<"!GROK!THIS!";
+$Config{startperl}
+    eval 'exec $Config{perlpath} -S \$0 \${1+"\$@"}'
+	if \$running_under_some_shell;
+!GROK!THIS!
+
+use File::Spec;
+
+my $cpan = File::Spec->catfile(File::Spec->catdir(File::Spec->updir, "lib", "CPAN", "bin"), "cpan");
+
+if (open(CPAN, $cpan)) {
+    print OUT <CPAN>;
+    close CPAN;
+} else {
+    die "$0: cannot find '$cpan'\n";
+}
+
+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;