1 files changed, 39 insertions, 0 deletions
diff --git a/lib/bundler/setup.rb b/lib/bundler/setup.rb
new file mode 100644
index 0000000000..5a0fd8e0e3
--- /dev/null
+++ b/lib/bundler/setup.rb
@@ -0,0 +1,39 @@
+# frozen_string_literal: true
+
+require_relative "shared_helpers"
+
+if Bundler::SharedHelpers.in_bundle?
+  require_relative "../bundler"
+
+  # autoswitch to locked Bundler version if available
+  Bundler.auto_switch
+
+  # try to auto_install first before we get to the `Bundler.ui.silence`, so user knows what is happening
+  Bundler.auto_install
+
+  if STDOUT.tty? || ENV["BUNDLER_FORCE_TTY"]
+    begin
+      Bundler.ui.silence { Bundler.setup }
+    rescue Bundler::BundlerError => e
+      Bundler.ui.error e.message
+      Bundler.ui.warn e.backtrace.join("\n") if ENV["DEBUG"]
+      if e.is_a?(Bundler::GemNotFound)
+        default_bundle = Gem.bin_path("bundler", "bundle")
+        current_bundle = Bundler::SharedHelpers.bundle_bin_path
+        suggested_bundle = default_bundle == current_bundle ? "bundle" : current_bundle
+        suggested_cmd = "#{suggested_bundle} install"
+        original_gemfile = Bundler.original_env["BUNDLE_GEMFILE"]
+        suggested_cmd += " --gemfile #{original_gemfile}" if original_gemfile
+        Bundler.ui.warn "Run `#{suggested_cmd}` to install missing gems."
+      end
+      exit e.status_code
+    end
+  else
+    Bundler.ui.silence { Bundler.setup }
+  end
+
+  # We might be in the middle of shelling out to rubygems
+  # (RUBYOPT=-rbundler/setup), so we need to give rubygems the opportunity of
+  # not being silent.
+  Gem::DefaultUserInteraction.ui = nil
+end