Description of Problem
Since GitPython 2.1.4, the initial import git fails because it invokes the git CLI, raising a git.exc.GitCommandNotFound error. However, due to the chicken-and-egg nature of this import, it is impossible for one to catch a git.exc.GitCommandNotFound error.
Steps to Reproduce
Install GitPython >= 2.1.4 on a box without git installed on it. An easy way to do this is to launch a Cent 7 docker container (which does not come with git installed off the base image), and then install GitPython (first installing EPEL repo and pip for ease of installation).
% docker run --rm -it centos:7 bash
[root@c1c079f693dc /]# yum --quiet -y install epel-release
warning: /var/cache/yum/x86_64/7/extras/packages/epel-release-7-9.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
Public key for epel-release-7-9.noarch.rpm is not installed
Importing GPG key 0xF4A80EB5:
Userid : "CentOS-7 Key (CentOS 7 Official Signing Key) <security@centos.org>"
Fingerprint: 6341 ab27 53d7 8a78 a7c2 7bb1 24c6 a8a7 f4a8 0eb5
Package : centos-release-7-3.1611.el7.centos.x86_64 (@CentOS)
From : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
[root@c1c079f693dc /]# yum --quiet -y install python-pip
warning: /var/cache/yum/x86_64/7/epel/packages/python2-pip-8.1.2-5.el7.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID 352c64e5: NOKEY
Public key for python2-pip-8.1.2-5.el7.noarch.rpm is not installed
Importing GPG key 0x352C64E5:
Userid : "Fedora EPEL (7) <epel@fedoraproject.org>"
Fingerprint: 91e9 7d7c 4a5e 96f1 7f3e 888f 6a2f aea2 352c 64e5
Package : epel-release-7-9.noarch (@extras)
From : /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
[root@c1c079f693dc /]# command -v git && echo git is installed || echo git is not installed
git is not installed
root@c1c079f693dc /]# pip install GitPython
Collecting GitPython
Downloading GitPython-2.1.5-py2.py3-none-any.whl (443kB)
100% |################################| 450kB 1.0MB/s
Collecting gitdb2>=2.0.0 (from GitPython)
Downloading gitdb2-2.0.2-py2.py3-none-any.whl (63kB)
100% |################################| 71kB 2.1MB/s
Collecting smmap2>=2.0.0 (from gitdb2>=2.0.0->GitPython)
Downloading smmap2-2.0.3-py2.py3-none-any.whl
Installing collected packages: smmap2, gitdb2, GitPython
Successfully installed GitPython-2.1.5 gitdb2-2.0.2 smmap2-2.0.3
You are using pip version 8.1.2, however version 9.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
Now attempt to import:
[root@c1c079f693dc /]# python -c 'import git'
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/usr/lib/python2.7/site-packages/git/__init__.py", line 45, in <module>
from git.repo import Repo # @NoMove @IgnorePep8
File "/usr/lib/python2.7/site-packages/git/repo/__init__.py", line 4, in <module>
from .base import *
File "/usr/lib/python2.7/site-packages/git/repo/base.py", line 31, in <module>
from git.remote import Remote, add_progress, to_progress_instance
File "/usr/lib/python2.7/site-packages/git/remote.py", line 190, in <module>
class FetchInfo(object):
File "/usr/lib/python2.7/site-packages/git/remote.py", line 219, in FetchInfo
v = Git().version_info[:2]
File "/usr/lib/python2.7/site-packages/git/cmd.py", line 461, in version_info
return self._version_info
File "/usr/lib/python2.7/site-packages/git/cmd.py", line 424, in __getattr__
return LazyMixin.__getattr__(self, name)
File "/usr/lib/python2.7/site-packages/gitdb/util.py", line 256, in __getattr__
self._set_cache_(attr)
File "/usr/lib/python2.7/site-packages/git/cmd.py", line 444, in _set_cache_
version_numbers = self._call_process('version').split(' ')[2]
File "/usr/lib/python2.7/site-packages/git/cmd.py", line 877, in _call_process
return self.execute(call, **exec_kwargs)
File "/usr/lib/python2.7/site-packages/git/cmd.py", line 602, in execute
raise GitCommandNotFound(command, err)
git.exc.GitCommandNotFound: Cmd('git') not found due to: OSError('[Errno 2] No such file or directory')
cmdline: git version
If you then downgrade to before version 2.1.4, the import works fine since the initial import no longer seems to be trying to invoke the git CLI:
[root@c1c079f693dc /]# pip install 'GitPython<2.1.4'
Collecting GitPython<2.1.4
Downloading GitPython-2.1.3-py2.py3-none-any.whl (442kB)
100% |################################| 450kB 993kB/s
Requirement already satisfied (use --upgrade to upgrade): gitdb2>=2.0.0 in /usr/lib/python2.7/site-packages (from GitPython<2.1.4)
Requirement already satisfied (use --upgrade to upgrade): smmap2>=2.0.0 in /usr/lib/python2.7/site-packages (from gitdb2>=2.0.0->GitPython<2.1.4)
Installing collected packages: GitPython
Found existing installation: GitPython 2.1.5
Uninstalling GitPython-2.1.5:
Successfully uninstalled GitPython-2.1.5
Successfully installed GitPython-2.1.3
You are using pip version 8.1.2, however version 9.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
[root@c1c079f693dc /]# python -c 'import git'
[root@c1c079f693dc /]#
Description of Problem
Since GitPython 2.1.4, the initial
import gitfails because it invokes the git CLI, raising agit.exc.GitCommandNotFounderror. However, due to the chicken-and-egg nature of this import, it is impossible for one to catch agit.exc.GitCommandNotFounderror.Steps to Reproduce
Install GitPython >= 2.1.4 on a box without git installed on it. An easy way to do this is to launch a Cent 7 docker container (which does not come with git installed off the base image), and then install GitPython (first installing EPEL repo and pip for ease of installation).
Now attempt to import:
If you then downgrade to before version 2.1.4, the import works fine since the initial import no longer seems to be trying to invoke the git CLI: