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From 279a693ce4ef3a887ce8d4fa59e0f2616a14d91a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADt=20Ondruch?= <vondruch@redhat.com>
Date: Fri, 11 Nov 2011 13:14:45 +0100
Subject: [PATCH] Allow to install RubyGems into custom location, outside of
 Ruby tree.

---
 configure.in      |    8 ++++++++
 tool/mkconfig.rb  |    1 +
 tool/rbinstall.rb |    9 +++++++++
 version.c         |    4 ++++
 4 files changed, 22 insertions(+), 0 deletions(-)

diff --git a/configure.in b/configure.in
index b1bc951..91c5d0d 100644
--- a/configure.in
+++ b/configure.in
@@ -2838,6 +2838,13 @@ until VENDOR_DIR=`eval echo \\"${dir}\\"`; test "x${dir}" = "x${VENDOR_DIR}"; do
     dir="${VENDORARCH_DIR}"
 done
 
+AC_ARG_WITH(rubygemsdir,
+           AS_HELP_STRING([--with-rubygemsdir=DIR], [custom rubygems directory]),
+            [rubygemsdir=$withval])
+if test "$rubygemsdir" != ""; then
+    AC_DEFINE_UNQUOTED(RUBYGEMS_DIR,"$rubygemsdir")
+fi
+
 if test "${LOAD_RELATIVE+set}"; then
     AC_DEFINE_UNQUOTED(LOAD_RELATIVE, $LOAD_RELATIVE)
     RUBY_EXEC_PREFIX=""
@@ -2931,6 +2938,7 @@ AC_SUBST(sitearch)dnl
 AC_SUBST(sitearchdir)dnl
 AC_SUBST(vendordir)dnl
 AC_SUBST(vendorarchdir)dnl
+AC_SUBST(rubygemsdir)dnl
 
 configure_args=$ac_configure_args
 AC_SUBST(configure_args)dnl
diff --git a/tool/mkconfig.rb b/tool/mkconfig.rb
index b707c4b..9fecbfb 100755
--- a/tool/mkconfig.rb
+++ b/tool/mkconfig.rb
@@ -84,6 +84,7 @@ File.foreach "config.status" do |line|
     when /^sitearchdir$/; sitearchdir_override = val; next
     when /^vendorarchdir$/; vendorarchdir_override = val; next
     when /^sitearch/; val = '$(arch)' if val.empty?
+    when /^rubygemsdir/; next if val.empty?
     end
     case val
     when /^\$\(ac_\w+\)$/; next
diff --git a/tool/rbinstall.rb b/tool/rbinstall.rb
index 6bfc73e..31dc446 100755
--- a/tool/rbinstall.rb
+++ b/tool/rbinstall.rb
@@ -300,6 +300,7 @@ sitelibdir = CONFIG["sitelibdir"]
 sitearchlibdir = CONFIG["sitearchdir"]
 vendorlibdir = CONFIG["vendorlibdir"]
 vendorarchlibdir = CONFIG["vendorarchdir"]
+rubygemsdir = CONFIG["rubygemsdir"]
 mandir = CONFIG["mandir"]
 capidir = CONFIG["docdir"]
 configure_args = Shellwords.shellwords(CONFIG["configure_args"])
@@ -487,7 +488,15 @@ end
 install?(:local, :comm, :lib) do
   prepare "library scripts", rubylibdir
   noinst = %w[README* *.txt *.rdoc]
+  noinst += %w[*ubygems.rb rubygems/ datadir.rb] if rubygemsdir
   install_recursive(File.join(srcdir, "lib"), rubylibdir, :no_install => noinst, :mode => $data_mode)
+  if rubygemsdir
+    noinst = %w[obsolete.rb]
+    install_recursive(File.join(srcdir, "lib", "rubygems"), File.join(rubygemsdir, "rubygems"), :mode => $data_mode)
+    install_recursive(File.join(srcdir, "lib", "rbconfig"), File.join(rubygemsdir, "rbconfig"), :no_install => noinst, :mode => $data_mode)
+    install(File.join(srcdir, "lib", "ubygems.rb"), File.join(rubygemsdir, "ubygems.rb"), :mode => $data_mode)
+    install(File.join(srcdir, "lib", "rubygems.rb"), File.join(rubygemsdir, "rubygems.rb"), :mode => $data_mode)
+  end
 end
 
 install?(:local, :arch, :lib) do
diff --git a/version.c b/version.c
index 59d4e5e..12ba7e9 100644
--- a/version.c
+++ b/version.c
@@ -103,6 +103,10 @@ const char ruby_initial_load_paths[] =
 #endif
 #endif
 
+#ifdef RUBYGEMS_DIR
+    RUBYGEMS_DIR "\0"
+#endif
+
     RUBY_LIB "\0"
 #ifdef RUBY_THIN_ARCHLIB
     RUBY_THIN_ARCHLIB "\0"
-- 
1.7.7