Refactored how the installer works

pre_commit/hooks_workspace.py

@@ -0,0 +1,20 @@
+
+import contextlib
+import os.path
+from plumbum import local
+
+import pre_commit.constants as C
+from pre_commit import git
+
+
+def get_pre_commit_dir_path():
+    return os.path.join(git.get_root(), C.HOOKS_WORKSPACE)
+
+@contextlib.contextmanager
+def in_hooks_workspace():
+    """Change into the hooks workspace.  If it does not exist create it."""
+    if not os.path.exists(get_pre_commit_dir_path()):
+        local.path(get_pre_commit_dir_path()).mkdir()
+
+    with local.cwd(get_pre_commit_dir_path()):
+        yield