Re-implement Open3 for Ruby 1.8.7 to avoid segfaultsseg-ruby-1-8-open3

1 files changed, 48 insertions, 0 deletions

diff --git a/spec/support/open3.rb b/spec/support/open3.rb
new file mode 100644
index 0000000000..0fd0649cf8
--- /dev/null
+++ b/spec/support/open3.rb
@@ -0,0 +1,48 @@
+# frozen_string_literal: true
+module Spec
+  if RUBY_VERSION > "1.9"
+    require "open3"
+    Open3 = ::Open3
+  else
+    module Open3
+      def popen3(*cmd, &block)
+        opts = {}
+        opts = cmd.pop if cmd.last.is_a?(Hash)
+
+        in_r, in_w = IO.pipe
+        opts[:in] = in_r
+        in_w.sync = true
+
+        out_r, out_w = IO.pipe
+        opts[:out] = out_w
+
+        err_r, err_w = IO.pipe
+        opts[:err] = err_w
+
+        child_io = [in_r, out_w, err_w]
+        parent_io = [in_w, out_r, err_r]
+
+        pid = fork do
+          STDIN.reopen(in_r)
+          STDOUT.reopen(out_w)
+          STDERR.reopen(err_w)
+          exec(*cmd)
+        end
+
+        wait_thr = Process.detach(pid)
+        child_io.each(&:close)
+        result = parent_io + [wait_thr]
+        if block_given?
+          begin
+            return yield(*result)
+          ensure
+            parent_io.each {|io| io.close unless io.closed? }
+            wait_thr.join
+          end
+        end
+        result
+      end
+      module_function :popen3
+    end
+  end
+end