Merge pull request #1842 from efiop/1835

pkg: import git dynamically

dvc/repo/pkg.py

@@ -2,12 +2,11 @@ from __future__ import unicode_literals
 
 import os
 import shutil
-from git.cmd import Git
 
 import dvc.logger as logger
 from dvc.exceptions import DvcException
 from dvc.stage import Stage
-from dvc.temp_git_repo import TempGitRepo
+from dvc.scm.git.temp_git_repo import TempGitRepo
 
 
 class PackageParams(object):
@@ -60,6 +59,8 @@ class GitPackage(Package):
     DEF_DVC_FILE_PREFIX = "mod_"
 
     def install_or_update(self, parent_repo, pkg_params):
+        from git.cmd import Git
+
         if not self.is_in_root():
             raise DvcException(
                 "This command can be run only from a repository root"

dvc/scm/git/temp_git_repo.py

@@ -2,8 +2,6 @@ import os
 import shutil
 import tempfile
 
-import git
-
 from dvc import logger
 from dvc.exceptions import DvcException
 
@@ -70,6 +68,8 @@ class TempGitRepo(object):
         return self
 
     def _clone_to_temp_dir(self):
+        import git
+
         result = tempfile.mktemp(
             prefix=self._tmp_mod_prefix, dir=self.modules_dir
         )