Installing updated bindep with pip 8.1.1

gistfile1.txt

root@7e6030e17519:~# git clone https://opendev.org/opendev/bindep
Cloning into 'bindep'...
remote: Enumerating objects: 426, done.
remote: Counting objects: 100% (426/426), done.
remote: Compressing objects: 100% (135/135), done.
remote: Total 1061 (delta 398), reused 291 (delta 291), pack-reused 635
Receiving objects: 100% (1061/1061), 213.10 KiB | 0 bytes/s, done.
Resolving deltas: 100% (593/593), done.
Checking connectivity... done.
root@7e6030e17519:~# cd bindep/
root@7e6030e17519:~/bindep# pwd
/root/bindep
root@7e6030e17519:~/bindep# git fetch https://review.opendev.org/opendev/bindep refs/changes/47/814647/2 && git checkout FETCH_HEAD
remote: Counting objects: 103, done
remote: Finding sources: 100% (3/3)
remote: Total 3 (delta 1), reused 3 (delta 1)
Unpacking objects: 100% (3/3), done.
From https://review.opendev.org/opendev/bindep
 * branch            refs/changes/47/814647/2 -> FETCH_HEAD
Note: checking out 'FETCH_HEAD'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by performing another checkout.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -b with the checkout command again. Example:

  git checkout -b <new-branch-name>

HEAD is now at 0bd79b1... Add old python packaging pin
root@7e6030e17519:~/bindep# git log -1
commit 0bd79b1d5dd94570f8e3629b991642e919acdb94
Author: Clark Boylan <clark.boylan@gmail.com>
Date:   Tue Oct 19 13:32:00 2021 -0700

    Add old python packaging pin
    
    The packaging package doesn't support python3.5 or older anymore. Bindep
    is still occasionally used on systems without newer python. Add an
    environment marker to our requirements to install older packaging on
    those systems.
    
    Change-Id: I28949b0bb7d4978fc7f71109d0c65b9b76d6563f
root@7e6030e17519:~/bindep# git diff HEAD^
diff --git a/requirements.txt b/requirements.txt
index 6ab819d..18ad23b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
 distro
 pbr>=2.0.0  # Apache-2.0
 Parsley
-packaging
+packaging ; python_version >= '3.6'
+packaging<21.0 ; python_version < '3.6'
root@7e6030e17519:~/bindep# cd
root@7e6030e17519:~# pip --version
bash: pip: command not found
root@7e6030e17519:~# pip3 --version
pip 8.1.1 from /usr/lib/python3/dist-packages (python 3.5)
root@7e6030e17519:~# pip3 install -U /root/bindep 
Processing ./bindep
    Complete output from command python setup.py egg_info:
    Couldn't find index page for 'pbr' (maybe misspelled?)
    No local packages or download links found for pbr
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-loubpi_8-build/setup.py", line 29, in <module>
        pbr=True)
      File "/usr/lib/python3.5/distutils/core.py", line 108, in setup
        _setup_distribution = dist = klass(attrs)
      File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 269, in __init__
        self.fetch_build_eggs(attrs['setup_requires'])
      File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 313, in fetch_build_eggs
        replace_conflicting=True,
      File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 826, in resolve
        dist = best[req.key] = env.best_match(req, ws, installer)
      File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 1092, in best_match
        return self.obtain(req, installer)
      File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 1104, in obtain
        return installer(requirement)
      File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 380, in fetch_build_egg
        return cmd.easy_install(req)
      File "/usr/lib/python3/dist-packages/setuptools/command/easy_install.py", line 657, in easy_install
        raise DistutilsError(msg)
    distutils.errors.DistutilsError: Could not find suitable distribution for Requirement.parse('pbr')
    
    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-loubpi_8-build/
You are using pip version 8.1.1, however version 21.3 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
root@7e6030e17519:~# pip3 install pbr
Collecting pbr
  Downloading https://files.pythonhosted.org/packages/18/e0/1d4702dd81121d04a477c272d47ee5b6bc970d1a0990b11befa275c55cf2/pbr-5.6.0-py2.py3-none-any.whl (111kB)
    100% |################################| 112kB 2.3MB/s 
Installing collected packages: pbr
Successfully installed pbr-5.6.0
You are using pip version 8.1.1, however version 21.3 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
root@7e6030e17519:~# pip3 install -U /root/bindep
Processing ./bindep
Collecting distro (from bindep===2.10.1.dev1)
  Downloading https://files.pythonhosted.org/packages/b3/8d/a0a5c389d76f90c766e956515d34c3408a1e18f60fbaa08221d1f6b87490/distro-1.6.0-py2.py3-none-any.whl
Requirement already up-to-date: pbr>=2.0.0 in /usr/local/lib/python3.5/dist-packages (from bindep===2.10.1.dev1)
Collecting Parsley (from bindep===2.10.1.dev1)
  Downloading https://files.pythonhosted.org/packages/2b/d6/4fed8d65e28a970e1c5cb33ce9c7e22e3de745e1b2ae37af051ef16aea3b/Parsley-1.3-py2.py3-none-any.whl (88kB)
    100% |################################| 92kB 3.0MB/s 
Collecting packaging<21.0 (from bindep===2.10.1.dev1)
  Downloading https://files.pythonhosted.org/packages/3e/89/7ea760b4daa42653ece2380531c90f64788d979110a2ab51049d92f408af/packaging-20.9-py2.py3-none-any.whl (40kB)
    100% |################################| 40kB 3.7MB/s 
Collecting pyparsing>=2.0.2 (from packaging<21.0->bindep===2.10.1.dev1)
  Downloading https://files.pythonhosted.org/packages/8a/bb/488841f56197b13700afd5658fc279a2025a39e22449b7cf29864669b15d/pyparsing-2.4.7-py2.py3-none-any.whl (67kB)
    100% |################################| 71kB 7.3MB/s 
Installing collected packages: distro, Parsley, pyparsing, packaging, bindep
  Running setup.py install for bindep ... done
Successfully installed Parsley-1.3 bindep-2.10.1.dev1 distro-1.6.0 packaging-20.9 pyparsing-2.4.7
You are using pip version 8.1.1, however version 21.3 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
root@7e6030e17519:~# bind
bind    bindep/ 
root@7e6030e17519:~# which bindep
/usr/local/bin/bindep
root@7e6030e17519:~# bindep --version
bindep 2.10.1.dev1