Support language_version for ruby as well.

pre_commit/languages/ruby.py

@@ -2,7 +2,6 @@ from __future__ import unicode_literals
 
 import contextlib
 import io
-import os
 
 from pre_commit.languages import helpers
 from pre_commit.util import clean_path_on_failure
@@ -16,21 +15,19 @@ class RubyEnv(helpers.Environment):
     def env_prefix(self):
         return '. {{prefix}}{0}/bin/activate &&'.format(ENVIRONMENT_DIR)
 
-    def run(self, *args, **kwargs):
-        # TODO: hardcoded version smell
-        env = dict(os.environ, RBENV_VERSION='1.9.3-p547')
-        return super(RubyEnv, self).run(*args, env=env, **kwargs)
-
 
 @contextlib.contextmanager
 def in_env(repo_cmd_runner):
     yield RubyEnv(repo_cmd_runner)
 
 
-def _install_rbenv(repo_cmd_runner):
+def _install_rbenv(repo_cmd_runner, version='default'):
     repo_cmd_runner.run([
         'git', 'clone', 'git://github.com/sstephenson/rbenv', '{prefix}rbenv',
     ])
+
+    # Only install ruby-build if the version is specified
+    if version != 'default':
         repo_cmd_runner.run([
             'git', 'clone', 'git://github.com/sstephenson/ruby-build',
             '{prefix}rbenv/plugins/ruby-build',
@@ -55,13 +52,19 @@ def _install_rbenv(repo_cmd_runner):
             '\n'.format(repo_cmd_runner.path('rbenv'))
         )
 
+        # If we aren't using the system ruby, add a version here
+        if version != 'default':
+            activate_file.write('export RBENV_VERSION="{0}"\n'.format(version))
+
 
 def install_environment(repo_cmd_runner, version='default'):
     with clean_path_on_failure(repo_cmd_runner.path('rbenv')):
-        _install_rbenv(repo_cmd_runner)
+        # TODO: this currently will fail if there's no version specified and
+        # there's no system ruby installed.  Is this ok?
+        _install_rbenv(repo_cmd_runner, version=version)
         with in_env(repo_cmd_runner) as ruby_env:
-            # TODO: hardcoded version smell
-            ruby_env.run('rbenv install 1.9.3-p547')
+            if version != 'default':
+                ruby_env.run('rbenv install {0}'.format(version))
             ruby_env.run(
                 'cd {prefix} && gem build *.gemspec && gem install *.gem',
             )

testing/resources/ruby_1_9_3_p547_hooks_repo/.gitignore

@@ -0,0 +1 @@
+*.gem

testing/resources/ruby_1_9_3_p547_hooks_repo/bin/ruby_hook

@@ -0,0 +1,5 @@
+#!/usr/bin/env ruby
+
+puts RUBY_VERSION
+puts RUBY_PATCHLEVEL
+puts 'Hello world from a ruby hook'

testing/resources/ruby_1_9_3_p547_hooks_repo/hooks.yaml

@@ -0,0 +1,5 @@
+-   id: ruby_hook
+    name: Ruby Hook
+    entry: ruby_hook
+    language: ruby
+    language_version: 1.9.3-p547

testing/resources/ruby_1_9_3_p547_hooks_repo/ruby_hook.gemspec

@@ -0,0 +1,9 @@
+Gem::Specification.new do |s|
+    s.name = 'ruby_hook'
+    s.version = '0.1.0'
+    s.authors = ['Anthony Sottile']
+    s.summary = 'A ruby hook!'
+    s.description = 'A ruby hook!'
+    s.files = ['bin/ruby_hook']
+    s.executables = ['ruby_hook']
+end

tests/conftest.py

@@ -92,6 +92,11 @@ def ruby_hooks_repo(dummy_git_repo):
     yield _make_repo(dummy_git_repo, 'ruby_hooks_repo')
 
 
+@pytest.yield_fixture
+def ruby_1_9_3_p547_hooks_repo(dummy_git_repo):
+    yield _make_repo(dummy_git_repo, 'ruby_1_9_3_p547_hooks_repo')
+
+
 @pytest.yield_fixture
 def consumer_repo(dummy_git_repo):
     yield _make_repo(dummy_git_repo, 'consumer_repo')
@@ -143,6 +148,11 @@ def config_for_ruby_hooks_repo(ruby_hooks_repo):
     yield _make_config(ruby_hooks_repo, 'ruby_hook', '\\.rb$')
 
 
+@pytest.yield_fixture
+def config_for_ruby_1_9_3_p547_hooks_repo(ruby_1_9_3_p547_hooks_repo):
+    yield _make_config(ruby_1_9_3_p547_hooks_repo, 'ruby_hook', '\\.rb$')
+
+
 @pytest.yield_fixture
 def config_for_python_hooks_repo(python_hooks_repo):
     yield _make_config(python_hooks_repo, 'foo', '\\.py$')

tests/languages/ruby_test.py

@@ -15,7 +15,21 @@ def test_install_rbenv(cmd_runner):
     activate_path = cmd_runner.path('rbenv', 'bin', 'activate')
     assert os.path.exists(activate_path)
 
-    # Should be able to activate using our script and access the install method
+    # Should be able to activate using our script and access rbenv
+    cmd_runner.run(
+        [
+            'bash',
+            '-c',
+            '. {prefix}/rbenv/bin/activate && rbenv --help',
+        ],
+    )
+
+
+@skipif_slowtests_false
+def test_install_rbenv_with_version(cmd_runner):
+    _install_rbenv(cmd_runner, version='1.9.3p547')
+
+    # Should be able to activate and use rbenv install
     cmd_runner.run(
         [
             'bash',

tests/repository_test.py

@@ -40,6 +40,16 @@ def test_run_versioned_node_hook(config_for_node_0_11_8_hooks_repo, store):
     assert ret[1] == 'v0.11.8\nHello World\n'
 
 
+@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):
+    repo = Repository.create(config_for_ruby_1_9_3_p547_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'
+
+
 @pytest.mark.integration
 def test_lots_of_files(config_for_python_hooks_repo, store):
     repo = Repository.create(config_for_python_hooks_repo, store)