Add install_dependencies rake task that installs testing dependenciestopic/rake-install-dependencies

Parse the dependency gems from openssl.gemspec and install them. This is
extracted from tool/ruby-openssl-docker/init.sh.

.travis.yml, appveyor.yml and CONTRIBUTING.md are also updated to use
the new task.

4 files changed, 24 insertions, 16 deletions

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 523c555e..6e6e2a54 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -44,7 +44,7 @@ Test cases are located under the
 You can run it with the following three commands:
 
 ```
-$ gem install rake-compiler test-unit
+$ rake install_dependencies # installs rake-compiler, test-unit, ...
 $ rake compile
 $ rake test
 ```
diff --git a/Rakefile b/Rakefile
index f3e7e3fa..91502607 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,11 +1,14 @@
-gem 'rake-compiler'
-
 require 'rake'
-require 'rake/extensiontask'
 require 'rake/testtask'
 require 'rdoc/task'
 
-Rake::ExtensionTask.new('openssl')
+begin
+  require 'rake/extensiontask'
+  Rake::ExtensionTask.new('openssl')
+rescue LoadError
+  warn "rake-compiler not installed. Run 'rake install_dependencies' to " \
+    "install testing dependency gems."
+end
 
 Rake::TestTask.new do |t|
   t.libs << 'test'
@@ -22,6 +25,20 @@ task :debug do
   ruby "-I./lib -ropenssl -ve'puts OpenSSL::OPENSSL_VERSION, OpenSSL::OPENSSL_LIBRARY_VERSION'"
 end
 
+task :install_dependencies do
+  if ENV["USE_HTTP_RUBYGEMS_ORG"] == "1"
+    Gem.sources.replace([Gem::Source.new("http://rubygems.org")])
+  end
+
+  Gem.configuration.verbose = false
+  gemspec = eval(File.read("openssl.gemspec"))
+  gemspec.development_dependencies.each do |dep|
+    print "Installing #{dep.name} (#{dep.requirement}) ... "
+    gem = Gem.install(dep.name, dep.requirement, force: true)
+    puts "#{gem[0].version}"
+  end
+end
+
 namespace :sync do
   task :from_ruby do
     sh "./tool/sync-with-trunk"
diff --git a/appveyor.yml b/appveyor.yml
index 9f2f8d05..c3e9c303 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -5,7 +5,7 @@ install:
   - appveyor DownloadFile http://dl.bintray.com/oneclick/OpenKnapsack/x64/openssl-1.0.1m-x64-windows.tar.lzma
   - 7z e openssl-1.0.1m-x64-windows.tar.lzma
   - 7z x -y -oC:\Ruby%ruby_version% openssl-1.0.1m-x64-windows.tar
-  - gem install rake-compiler
+  - ruby -S rake install_dependencies
 build_script:
   - rake -rdevkit compile -- --with-openssl-dir=C:\Ruby%ruby_version%
 test_script:
diff --git a/tool/ruby-openssl-docker/init.sh b/tool/ruby-openssl-docker/init.sh
index 3fa271c4..c4301482 100755
--- a/tool/ruby-openssl-docker/init.sh
+++ b/tool/ruby-openssl-docker/init.sh
@@ -15,15 +15,6 @@ export PATH="/opt/ruby/${RUBY_VERSION}/bin:$PATH"
 export LD_LIBRARY_PATH="/opt/openssl/${OPENSSL_VERSION}/lib"
 export PKG_CONFIG_PATH="/opt/openssl/${OPENSSL_VERSION}/lib/pkgconfig"
 
-ruby -e '
-  newsource = Gem::Source.new("http://rubygems.org")
-  Gem.sources.replace([newsource])
-  Gem.configuration.write
-
-  spec = eval(File.read("openssl.gemspec"))
-  spec.development_dependencies.each do |dep|
-    Gem.install(dep.name, dep.requirement, force: true)
-  end
-'
+rake install_dependencies USE_HTTP_RUBYGEMS_ORG=1
 
 exec $*