Attempt ruby-download before ruby-build.

pre_commit/languages/ruby.py

@@ -4,6 +4,7 @@ import contextlib
 import io
 
 from pre_commit.languages import helpers
+from pre_commit.prefixed_command_runner import CalledProcessError
 from pre_commit.util import clean_path_on_failure
 
 
@@ -28,6 +29,12 @@ def _install_rbenv(repo_cmd_runner, version='default'):
 
     # Only install ruby-build if the version is specified
     if version != 'default':
+        # ruby-download
+        repo_cmd_runner.run([
+            'git', 'clone', 'git://github.com/garnieretienne/rvm-download',
+            '{prefix}rbenv/plugins/ruby-download',
+        ])
+        # ruby-build
         repo_cmd_runner.run([
             'git', 'clone', 'git://github.com/sstephenson/ruby-build',
             '{prefix}rbenv/plugins/ruby-build',
@@ -57,6 +64,14 @@ def _install_rbenv(repo_cmd_runner, version='default'):
             activate_file.write('export RBENV_VERSION="{0}"\n'.format(version))
 
 
+def _install_ruby(environment, version):
+    try:
+        environment.run('rbenv download {0}'.format(version))
+    except CalledProcessError:
+        # Failed to download from mirror for some reason, build it instead
+        environment.run('rbenv install {0}'.format(version))
+
+
 def install_environment(repo_cmd_runner, version='default'):
     with clean_path_on_failure(repo_cmd_runner.path('rbenv')):
         # TODO: this currently will fail if there's no version specified and
@@ -64,7 +79,7 @@ def install_environment(repo_cmd_runner, version='default'):
         _install_rbenv(repo_cmd_runner, version=version)
         with in_env(repo_cmd_runner) as ruby_env:
             if version != 'default':
-                ruby_env.run('rbenv install {0}'.format(version))
+                _install_ruby(ruby_env, version)
             ruby_env.run(
                 'cd {prefix} && gem build *.gemspec && gem install *.gem',
             )

testing/resources/ruby_1_9_3_hooks_repo/hooks.yaml

@@ -2,5 +2,5 @@
     name: Ruby Hook
     entry: ruby_hook
     language: ruby
-    language_version: 1.9.3-p547
+    language_version: 1.9.3-p484
     files: \.rb$

tests/conftest.py

@@ -93,8 +93,8 @@ def ruby_hooks_repo(dummy_git_repo):
 
 
 @pytest.yield_fixture
-def ruby_1_9_3_p547_hooks_repo(dummy_git_repo):
+def ruby_1_9_3_hooks_repo(dummy_git_repo):
-    yield _make_repo(dummy_git_repo, 'ruby_1_9_3_p547_hooks_repo')
+    yield _make_repo(dummy_git_repo, 'ruby_1_9_3_hooks_repo')
 
 
 @pytest.yield_fixture
@@ -149,8 +149,8 @@ def config_for_ruby_hooks_repo(ruby_hooks_repo):
 
 
 @pytest.yield_fixture
-def config_for_ruby_1_9_3_p547_hooks_repo(ruby_1_9_3_p547_hooks_repo):
+def config_for_ruby_1_9_3_hooks_repo(ruby_1_9_3_hooks_repo):
-    yield _make_config(ruby_1_9_3_p547_hooks_repo, 'ruby_hook')
+    yield _make_config(ruby_1_9_3_hooks_repo, 'ruby_hook')
 
 
 @pytest.yield_fixture

tests/repository_test.py

@@ -44,11 +44,11 @@ def test_run_versioned_node_hook(config_for_node_0_11_8_hooks_repo, store):
 @pytest.mark.herpderp
 @skipif_slowtests_false
 @pytest.mark.integration
-def test_run_versioned_ruby_hook(config_for_ruby_1_9_3_p547_hooks_repo, store):
+def test_run_versioned_ruby_hook(config_for_ruby_1_9_3_hooks_repo, store):
-    repo = Repository.create(config_for_ruby_1_9_3_p547_hooks_repo, store)
+    repo = Repository.create(config_for_ruby_1_9_3_hooks_repo, store)
     ret = repo.run_hook('ruby_hook', [])
     assert ret[0] == 0
-    assert ret[1] == '1.9.3\n547\nHello world from a ruby hook\n'
+    assert ret[1] == '1.9.3\n484\nHello world from a ruby hook\n'
 
 
 @pytest.mark.integration