Allowing for creation of pre-compiled gems, using rack-compiler-dock.

17 files changed, 312 insertions, 23 deletions

diff --git a/.gitignore b/.gitignore
index cc70659661..64dc26c3a2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -56,7 +56,7 @@ out
 .ycm_extra_conf.py
 
 # XCode
-build/
+^build/
 *.pbxuser
 !default.pbxuser
 *.mode1v3
diff --git a/Rakefile b/Rakefile
index 079df67996..89a253df43 100755
--- a/Rakefile
+++ b/Rakefile
@@ -10,11 +10,18 @@ RuboCop::RakeTask.new(:rubocop) do |task|
   task.patterns = ['src/ruby/{lib,spec}/**/*.rb']
 end
 
+spec = Gem::Specification.load('grpc.gemspec')
+
+Gem::PackageTask.new(spec) do |pkg|
+end
+
 # Add the extension compiler task
-Rake::ExtensionTask.new 'grpc' do |ext|
+Rake::ExtensionTask.new('grpc', spec) do |ext|
   ext.source_pattern = '**/*.{c,h}'
   ext.ext_dir = File.join('src', 'ruby', 'ext', 'grpc')
   ext.lib_dir = File.join('src', 'ruby', 'lib', 'grpc')
+  ext.cross_compile = true
+  ext.cross_platform = ['x86-mingw32', 'x64-mingw32']
 end
 
 # Define the test suites
@@ -51,6 +58,20 @@ namespace :suite do
   end
 end
 
+desc 'Build the gem file under rake_compiler_dock'
+task 'gem:windows' do
+  require 'digest'
+  require 'rake_compiler_dock'
+  version = Digest::SHA1.file('third_party/rake-compiler-dock/Dockerfile').hexdigest
+  image_name = 'grpc/rake-compiler-dock:' + version
+  cmd = "docker build -t #{image_name} third_party/rake-compiler-dock"
+  puts cmd
+  system cmd
+  exit 1 unless $? == 0
+  ENV['RAKE_COMPILER_DOCK_IMAGE'] = image_name
+  RakeCompilerDock.sh "bundle && rake cross native gem RUBY_CC_VERSION=2.3.0:2.2.2:2.1.6:2.0.0"
+end
+
 # Define dependencies between the suites.
 task 'suite:wrapper' => [:compile, :rubocop]
 task 'suite:idiomatic' => 'suite:wrapper'
diff --git a/grpc.gemspec b/grpc.gemspec
index 47b66ae535..c38d13cb8b 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -16,7 +16,7 @@ Gem::Specification.new do |s|
   s.required_ruby_version = '>= 2.0.0'
   s.requirements << 'libgrpc ~> 0.11.0 needs to be installed'
 
-  s.files = %w( Rakefile Makefile )
+  s.files = %w( Makefile )
   s.files += %w( etc/roots.pem )
   s.files += Dir.glob('src/ruby/bin/**/*')
   s.files += Dir.glob('src/ruby/ext/**/*')
@@ -33,16 +33,17 @@ Gem::Specification.new do |s|
   s.platform      = Gem::Platform::RUBY
 
   s.add_dependency 'google-protobuf', '~> 3.0.0alpha.1.1'
-  s.add_dependency 'googleauth', '~> 0.5.1'
+  s.add_dependency 'googleauth',      '~> 0.5.1'
 
-  s.add_development_dependency 'bundler', '~> 1.9'
-  s.add_development_dependency 'logging', '~> 2.0'
-  s.add_development_dependency 'simplecov', '~> 0.9'
-  s.add_development_dependency 'rake', '~> 10.4'
-  s.add_development_dependency 'rake-compiler', '~> 0.9'
-  s.add_development_dependency 'rspec', '~> 3.2'
-  s.add_development_dependency 'rubocop', '~> 0.30.0'
-  s.add_development_dependency 'signet', '~>0.7.0'
+  s.add_development_dependency 'bundler',            '~> 1.9'
+  s.add_development_dependency 'logging',            '~> 2.0'
+  s.add_development_dependency 'simplecov',          '~> 0.9'
+  s.add_development_dependency 'rake',               '~> 10.4'
+  s.add_development_dependency 'rake-compiler',      '~> 0.9'
+  s.add_development_dependency 'rake-compiler-dock', '~> 0.5'
+  s.add_development_dependency 'rspec',              '~> 3.2'
+  s.add_development_dependency 'rubocop',            '~> 0.30.0'
+  s.add_development_dependency 'signet',             '~> 0.7.0'
 
   s.extensions = %w(src/ruby/ext/grpc/extconf.rb)
 
diff --git a/src/ruby/lib/grpc.rb b/src/ruby/lib/grpc.rb
index 1671ba3550..7890e17551 100644
--- a/src/ruby/lib/grpc.rb
+++ b/src/ruby/lib/grpc.rb
@@ -32,8 +32,13 @@ unless ENV['GRPC_DEFAULT_SSL_ROOTS_FILE_PATH']
   ENV['GRPC_DEFAULT_SSL_ROOTS_FILE_PATH'] = ssl_roots_path
 end
 
+begin
+  require "grpc/#{RUBY_VERSION.sub(/\.\d$/, '')}/grpc"
+rescue LoadError
+  require 'grpc/grpc'
+end
+
 require 'grpc/errors'
-require 'grpc/grpc'
 require 'grpc/logconfig'
 require 'grpc/notifier'
 require 'grpc/version'
diff --git a/templates/grpc.gemspec.template b/templates/grpc.gemspec.template
index fdf87ee13f..f015e539be 100644
--- a/templates/grpc.gemspec.template
+++ b/templates/grpc.gemspec.template
@@ -18,7 +18,7 @@
     s.required_ruby_version = '>= 2.0.0'
     s.requirements << 'libgrpc ~> 0.11.0 needs to be installed'
 
-    s.files = %w( Rakefile Makefile )
+    s.files = %w( Makefile )
     s.files += %w( etc/roots.pem )
     s.files += Dir.glob('src/ruby/bin/**/*')
     s.files += Dir.glob('src/ruby/ext/**/*')
@@ -35,16 +35,17 @@
     s.platform      = Gem::Platform::RUBY
 
     s.add_dependency 'google-protobuf', '~> 3.0.0alpha.1.1'
-    s.add_dependency 'googleauth', '~> 0.5.1'
+    s.add_dependency 'googleauth',      '~> 0.5.1'
 
-    s.add_development_dependency 'bundler', '~> 1.9'
-    s.add_development_dependency 'logging', '~> 2.0'
-    s.add_development_dependency 'simplecov', '~> 0.9'
-    s.add_development_dependency 'rake', '~> 10.4'
-    s.add_development_dependency 'rake-compiler', '~> 0.9'
-    s.add_development_dependency 'rspec', '~> 3.2'
-    s.add_development_dependency 'rubocop', '~> 0.30.0'
-    s.add_development_dependency 'signet', '~>0.7.0'
+    s.add_development_dependency 'bundler',            '~> 1.9'
+    s.add_development_dependency 'logging',            '~> 2.0'
+    s.add_development_dependency 'simplecov',          '~> 0.9'
+    s.add_development_dependency 'rake',               '~> 10.4'
+    s.add_development_dependency 'rake-compiler',      '~> 0.9'
+    s.add_development_dependency 'rake-compiler-dock', '~> 0.5'
+    s.add_development_dependency 'rspec',              '~> 3.2'
+    s.add_development_dependency 'rubocop',            '~> 0.30.0'
+    s.add_development_dependency 'signet',             '~> 0.7.0'
 
     s.extensions = %w(src/ruby/ext/grpc/extconf.rb)
 
diff --git a/third_party/rake-compiler-dock/Dockerfile b/third_party/rake-compiler-dock/Dockerfile
new file mode 100644
index 0000000000..11a6bd7796
--- /dev/null
+++ b/third_party/rake-compiler-dock/Dockerfile
@@ -0,0 +1,109 @@
+FROM ubuntu:14.04
+
+RUN apt-get -y update && \
+    apt-get install -y curl git-core mingw-w64 xz-utils build-essential wget unzip
+
+RUN mkdir -p /opt/mingw && \
+    curl -SL http://downloads.sourceforge.net/mingw-w64/i686-w64-mingw32-gcc-4.7.2-release-linux64_rubenvb.tar.xz | \
+    tar -xJC /opt/mingw && \
+    echo "export PATH=\$PATH:/opt/mingw/mingw32/bin" >> /etc/rubybashrc
+
+RUN mkdir -p /opt/mingw && \
+    curl -SL http://downloads.sourceforge.net/mingw-w64/x86_64-w64-mingw32-gcc-4.7.2-release-linux64_rubenvb.tar.xz | \
+    tar -xJC /opt/mingw && \
+    echo "export PATH=\$PATH:/opt/mingw/mingw64/bin" >> /etc/rubybashrc
+
+# Add "rvm" as system group, to avoid conflicts with host GIDs typically starting with 1000
+RUN groupadd -r rvm && useradd -r -g rvm -G sudo -p "" --create-home rvm && \
+    echo "source /etc/profile.d/rvm.sh" >> /etc/rubybashrc
+USER rvm
+
+# install rvm, RVM 1.26.0+ has signed releases, source rvm for usage outside of package scripts
+RUN gpg --keyserver hkp://keys.gnupg.net --recv-keys D39DC0E3 && \
+    (curl -L http://get.rvm.io | sudo bash -s stable) && \
+    bash -c " \
+        source /etc/rubybashrc && \
+        rvmsudo rvm cleanup all "
+
+# Import patch files for ruby and gems
+COPY build/patches /home/rvm/patches/
+ENV BASH_ENV /etc/rubybashrc
+
+# install rubies and fix permissions on
+RUN bash -c " \
+    export CFLAGS='-s -O3 -fno-fast-math -fPIC' && \
+    for v in 2.3.0 ; do \
+        rvm install \$v --patch \$(echo ~/patches/ruby-\$v/* | tr ' ' ','); \
+    done && \
+    rvm cleanup all && \
+    find /usr/local/rvm -type d -print0 | sudo xargs -0 chmod g+sw "
+
+# Install rake-compiler and typical gems in all Rubies
+# do not generate documentation for gems
+RUN echo "gem: --no-ri --no-rdoc" >> ~/.gemrc && \
+    bash -c " \
+        rvm all do gem install bundler rake-compiler hoe mini_portile rubygems-tasks json && \
+        rvm 2.3.0 do gem install mini_portile2 && \
+        find /usr/local/rvm -type d -print0 | sudo xargs -0 chmod g+sw "
+
+# Install rake-compiler's cross rubies in global dir instead of /root
+RUN sudo mkdir -p /usr/local/rake-compiler && \
+    sudo chown rvm.rvm /usr/local/rake-compiler && \
+    ln -s /usr/local/rake-compiler ~/.rake-compiler
+
+# Patch rake-compiler to avoid build of ruby extensions
+RUN cd /usr/local/rvm/gems/ruby-2.3.0/gems/rake-compiler-0.9.5 && patch -p1 < /home/rvm/patches/rake-compiler-0.9.5/without-exts.diff ; \
+    true
+
+RUN bash -c "rvm use 2.3.0 --default && \
+    export MAKE=\"make -j`nproc`\" CFLAGS='-s -O1 -fno-omit-frame-pointer -fno-fast-math' && \
+    rake-compiler cross-ruby VERSION=2.3.0 HOST=i686-w64-mingw32 && \
+    rake-compiler cross-ruby VERSION=2.3.0 HOST=x86_64-w64-mingw32 && \
+    rake-compiler cross-ruby VERSION=2.2.2 HOST=i686-w64-mingw32 && \
+    rake-compiler cross-ruby VERSION=2.2.2 HOST=x86_64-w64-mingw32 && \
+    rake-compiler cross-ruby VERSION=2.1.6 HOST=i686-w64-mingw32 && \
+    rake-compiler cross-ruby VERSION=2.1.6 HOST=x86_64-w64-mingw32 && \
+    rake-compiler cross-ruby VERSION=2.0.0-p645 HOST=i686-w64-mingw32 && \
+    rake-compiler cross-ruby VERSION=2.0.0-p645 HOST=x86_64-w64-mingw32 && \
+    rm -rf ~/.rake-compiler/builds ~/.rake-compiler/sources && \
+    find /usr/local/rvm -type d -print0 | sudo xargs -0 chmod g+sw "
+
+RUN bash -c " \
+    rvm alias create 2.3 2.3.0 "
+
+USER root
+
+# Fix paths in rake-compiler/config.yml and add rvm and mingw-tools to the global bashrc
+RUN sed -i -- "s:/root/.rake-compiler:/usr/local/rake-compiler:g" /usr/local/rake-compiler/config.yml && \
+    echo "source /etc/profile.d/rvm.sh" >> /etc/bash.bashrc && \
+    echo "export PATH=\$PATH:/opt/mingw/mingw32/bin" >> /etc/bash.bashrc && \
+    echo "export PATH=\$PATH:/opt/mingw/mingw64/bin" >> /etc/bash.bashrc
+
+# Install wrappers for strip commands as a workaround for "Protocol error" in boot2docker.
+COPY build/strip_wrapper /root/
+RUN mv /opt/mingw/mingw32/bin/i686-w64-mingw32-strip /opt/mingw/mingw32/bin/i686-w64-mingw32-strip.bin && \
+    mv /opt/mingw/mingw64/bin/x86_64-w64-mingw32-strip /opt/mingw/mingw64/bin/x86_64-w64-mingw32-strip.bin && \
+    mv /usr/bin/i686-w64-mingw32-strip /usr/bin/i686-w64-mingw32-strip.bin && \
+    mv /usr/bin/x86_64-w64-mingw32-strip /usr/bin/x86_64-w64-mingw32-strip.bin && \
+    ln /root/strip_wrapper /opt/mingw/mingw32/bin/i686-w64-mingw32-strip && \
+    ln /root/strip_wrapper /opt/mingw/mingw64/bin/x86_64-w64-mingw32-strip && \
+    ln /root/strip_wrapper /usr/bin/i686-w64-mingw32-strip && \
+    ln /root/strip_wrapper /usr/bin/x86_64-w64-mingw32-strip
+
+RUN find / -name rbconfig.rb | while read f ; do sed -i 's/0x0501/0x0600/' $f ; done
+RUN find / -name win32.h | while read f ; do sed -i 's/gettimeofday/rb_gettimeofday/' $f ; done
+RUN sed -i 's/defined.__MINGW64__.$/1/' /usr/local/rake-compiler/ruby/i686-w64-mingw32/ruby-2.0.0-p645/include/ruby-2.0.0/ruby/win32.h
+
+# Install SIGINT forwarder
+COPY build/sigfw.c /root/
+RUN gcc $HOME/sigfw.c -o /usr/local/bin/sigfw
+
+# Install user mapper
+COPY build/runas /usr/local/bin/
+
+# Install sudoers configuration
+COPY build/sudoers /etc/sudoers.d/rake-compiler-dock
+
+ENV RUBY_CC_VERSION 2.3.0:2.2.2:2.1.6:2.0.0
+
+CMD bash
diff --git a/third_party/rake-compiler-dock/LICENSE.txt b/third_party/rake-compiler-dock/LICENSE.txt
new file mode 100644
index 0000000000..b884ba5396
--- /dev/null
+++ b/third_party/rake-compiler-dock/LICENSE.txt
@@ -0,0 +1,22 @@
+Copyright (c) 2015 Lars Kanis
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/third_party/rake-compiler-dock/README.md b/third_party/rake-compiler-dock/README.md
new file mode 100644
index 0000000000..0a9aa8ba78
--- /dev/null
+++ b/third_party/rake-compiler-dock/README.md
@@ -0,0 +1 @@
+This is a modified Dockerfile taken from [rake-compiler-dock](https://github.com/rake-compiler/rake-compiler-dock) for the purpose of building gRPC's ruby gem.
diff --git a/third_party/rake-compiler-dock/build/patches/rake-compiler-0.9.5/without-exts.diff b/third_party/rake-compiler-dock/build/patches/rake-compiler-0.9.5/without-exts.diff
new file mode 100644
index 0000000000..07739d33ec
--- /dev/null
+++ b/third_party/rake-compiler-dock/build/patches/rake-compiler-0.9.5/without-exts.diff
@@ -0,0 +1,14 @@
+diff --git a/tasks/bin/cross-ruby.rake b/tasks/bin/cross-ruby.rake
+index 6acc816..6aa2a49 100644
+--- a/tasks/bin/cross-ruby.rake
++++ b/tasks/bin/cross-ruby.rake
+@@ -135,8 +135,7 @@ file "#{USER_HOME}/builds/#{MINGW_HOST}/#{RUBY_CC_VERSION}/Makefile" => ["#{USER
+     "--build=#{RUBY_BUILD}",
+     '--enable-shared',
+     '--disable-install-doc',
+-    '--without-tk',
+-    '--without-tcl'
++    '--with-ext='
+   ]
+
+   # Force Winsock2 for Ruby 1.8, 1.9 defaults to it
diff --git a/third_party/rake-compiler-dock/build/patches/ruby-1.8.7-p374/nop.patch b/third_party/rake-compiler-dock/build/patches/ruby-1.8.7-p374/nop.patch
new file mode 100644
index 0000000000..fac8525da6
--- /dev/null
+++ b/third_party/rake-compiler-dock/build/patches/ruby-1.8.7-p374/nop.patch
@@ -0,0 +1,2 @@
+diff --git a/configure b/configure
+index 55157af..6630eba 100755
diff --git a/third_party/rake-compiler-dock/build/patches/ruby-1.9.3/no_sendfile.patch b/third_party/rake-compiler-dock/build/patches/ruby-1.9.3/no_sendfile.patch
new file mode 100644
index 0000000000..d8f339e814
--- /dev/null
+++ b/third_party/rake-compiler-dock/build/patches/ruby-1.9.3/no_sendfile.patch
@@ -0,0 +1,13 @@
+diff --git a/configure b/configure
+index 898730c..cfe6253 100755
+--- a/configure
++++ b/configure
+@@ -14695,7 +14695,7 @@ for ac_func in fmod killpg wait4 waitpid fork spawnv syscall __syscall chroot ge
+ 	      setsid telldir seekdir fchmod cosh sinh tanh log2 round\
+ 	      setuid setgid daemon select_large_fdset setenv unsetenv\
+               mktime timegm gmtime_r clock_gettime gettimeofday poll ppoll\
+-              pread sendfile shutdown sigaltstack dl_iterate_phdr
++              pread shutdown sigaltstack dl_iterate_phdr
+ do :
+   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
+ ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
diff --git a/third_party/rake-compiler-dock/build/patches/ruby-1.9.3/nop.patch b/third_party/rake-compiler-dock/build/patches/ruby-1.9.3/nop.patch
new file mode 100644
index 0000000000..fac8525da6
--- /dev/null
+++ b/third_party/rake-compiler-dock/build/patches/ruby-1.9.3/nop.patch
@@ -0,0 +1,2 @@
+diff --git a/configure b/configure
+index 55157af..6630eba 100755
diff --git a/third_party/rake-compiler-dock/build/patches/ruby-2.3.0/no_sendfile.patch b/third_party/rake-compiler-dock/build/patches/ruby-2.3.0/no_sendfile.patch
new file mode 100644
index 0000000000..915fc7b790
--- /dev/null
+++ b/third_party/rake-compiler-dock/build/patches/ruby-2.3.0/no_sendfile.patch
@@ -0,0 +1,12 @@
+diff --git a/configure b/configure
+index ebe3d8c..a336b73 100755
+--- a/configure
++++ b/configure
+@@ -18943,7 +18943,6 @@ do :
+   ac_fn_c_check_func "$LINENO" "sendfile" "ac_cv_func_sendfile"
+ if test "x$ac_cv_func_sendfile" = xyes; then :
+   cat >>confdefs.h <<_ACEOF
+-#define HAVE_SENDFILE 1
+ _ACEOF
+ 
+ fi
diff --git a/third_party/rake-compiler-dock/build/runas b/third_party/rake-compiler-dock/build/runas
new file mode 100755
index 0000000000..b29ce31fcc
--- /dev/null
+++ b/third_party/rake-compiler-dock/build/runas
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+groupadd -g "$GID" "$GROUP"
+mkdir -p /tmp/home
+useradd -g "$GID" -u "$UID" -G rvm,sudo -p "" -b /tmp/home -m "$USER"
+
+HOME=$(bash <<< "echo ~$USER")
+ln -s /usr/local/rake-compiler "$HOME"/.rake-compiler
+
+sudo -u "$USER" --set-home \
+    BASH_ENV=/etc/rubybashrc \
+    -- "$@"
diff --git a/third_party/rake-compiler-dock/build/sigfw.c b/third_party/rake-compiler-dock/build/sigfw.c
new file mode 100644
index 0000000000..291d76cec8
--- /dev/null
+++ b/third_party/rake-compiler-dock/build/sigfw.c
@@ -0,0 +1,43 @@
+/*
+ * This program handles SIGINT and forwards it to another process.
+ * It is intended to be run as PID 1.
+ *
+ * Docker starts processes with "docker run" as PID 1.
+ * On Linux, the default signal handler for PID 1 ignores any signals.
+ * Therefore Ctrl-C aka SIGINT is ignored per default.
+ */
+
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+int pid = 0;
+
+void
+handle_sigint (int signum)
+{
+  if(pid)
+    kill(pid, SIGINT);
+}
+
+int main(int argc, char *argv[]){
+  struct sigaction new_action;
+  int status = -1;
+
+  /* Set up the structure to specify the new action. */
+  new_action.sa_handler = handle_sigint;
+  sigemptyset (&new_action.sa_mask);
+  new_action.sa_flags = 0;
+
+  sigaction (SIGINT, &new_action, (void*)0);
+
+  pid = fork();
+  if(pid){
+    wait(&status);
+    return WEXITSTATUS(status);
+  }else{
+    status = execvp(argv[1], &argv[1]);
+    perror("exec");
+    return status;
+  }
+}
diff --git a/third_party/rake-compiler-dock/build/strip_wrapper b/third_party/rake-compiler-dock/build/strip_wrapper
new file mode 100755
index 0000000000..7f8a1346a1
--- /dev/null
+++ b/third_party/rake-compiler-dock/build/strip_wrapper
@@ -0,0 +1,30 @@
+#!/usr/bin/env ruby
+
+# Strip file on local folder instead of a Virtualbox shared folder
+# to work around this bug: https://www.virtualbox.org/ticket/8463
+
+require 'tempfile'
+require 'fileutils'
+
+strip = "#{File.basename($0)}.bin"
+
+files = ARGV.reject{|f| f=~/^-/ }.map do |arg|
+  tmp = Tempfile.new 'strip'
+  tmp.close
+  FileUtils.cp arg, tmp.path
+  [tmp, arg]
+end
+
+options = ARGV.select{|f| f=~/^-/ } + files.map{|t,o| t.path }
+
+unless system( strip, *options )
+  exit 127
+end
+code = $?.exitstatus
+
+files.each do |tmp, orig|
+  FileUtils.rm orig
+  FileUtils.cp tmp.path, orig
+end
+
+exit code
diff --git a/third_party/rake-compiler-dock/build/sudoers b/third_party/rake-compiler-dock/build/sudoers
new file mode 100644
index 0000000000..f9f9b97c95
--- /dev/null
+++ b/third_party/rake-compiler-dock/build/sudoers
@@ -0,0 +1 @@
+Defaults        env_keep += "http_proxy https_proxy ftp_proxy RCD_HOST_RUBY_PLATFORM RCD_HOST_RUBY_VERSION RCD_IMAGE RUBY_CC_VERSION"