Merge branch 'master' of github.com:pre-commit/pre-commit

pre_commit/languages/ruby.py

@@ -1,7 +1,36 @@
 
+import contextlib
+from plumbum import local
+
+from pre_commit.languages import helpers
+
+
+RVM_ENV = 'rvm_env'
+
+
+class RubyEnv(object):
+    def __init__(self):
+        self.env_prefix = '. {0}/.rvm/scripts/rvm'.format(RVM_ENV)
+
+    def run(self, cmd, **kwargs):
+        return local['bash']['-c', ' '.join([self.env_prefix, cmd])].run(**kwargs)
+
+
+@contextlib.contextmanager
+def in_env():
+    yield RubyEnv()
+
+
 def install_environment():
-    raise NotImplementedError
+    # Return immediately if we already have a virtualenv
+    if local.path(RVM_ENV).exists():
+        return
+
+    local['__rvm-env.sh'][RVM_ENV]()
+    with in_env() as env:
+        env.run('bundle install')
 
 
 def run_hook(hook, file_args):
-    raise NotImplementedError
+    with in_env() as env:
+        return helpers.run_hook(env, hook, file_args)