Experimental Physics and
Industrial Control System

Torsten Bögershausen via Tech-talk <tech-talk at aps.anl.gov> · Tue, 14 Jun 2022 04:14:38 +0000

This is a longish explanation what 
" pip install git+git://github.com/drdoctr/[email protected]" 
means, and why 
" pip install git+https://github.com/drdoctr/[email protected]";
is better.

The line
pip install git+git://github.com/drdoctr/[email protected] 
tells pip to use Git as a version control system (and not svn, hg, bzr).
That is the "git" before the '+'

The second "git" is the protocol:
https://git-scm.com/book/en/v2/Git-on-the-Server-The-Protocols

Both https and ssh protocols use encryption, but the git protocol does not.
And neither does http (without the s) use encryption.

The http has been used a long time (even when talking to git servers),
but now most web servers are configured to use https only.
In that sense, http has been deprecated.

The  protocol that does not use encryption either is the git protocol.
And using the git protocol is getting more and more deprecated.

For github  we can read here:
<https://github.blog/changelog/2022-03-15-removed-unencrypted-git-protocol-and-certain-ssh-keys/>

Back to pip:

https://pip.pypa.io/en/stable/cli/pip_install/

indicates that 
pip install git+https://github.com/drdoctr/[email protected]
should be used (and that is what is what you do now, Mark)
/Torsten

From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Mark Rivers via Tech-talk <tech-talk at aps.anl.gov>
Reply-To: Mark Rivers <rivers at cars.uchicago.edu>
Date: Monday, 13 June 2022 at 22:40
To: "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov>
Subject: Github and travis question

The .travis.yml file in areaDetector contains these lines:

   - pip install git+git://github.com/drdoctr/[email protected]
   - pip install git+git://github.com/michaeljones/[email protected]
   - pip install git+git://github.com/return42/linuxdoc.git

This was working OK, but recently the travis builds have been failing with this error:

$ pip install git+git://github.com/drdoctr/[email protected]
Collecting git+git://github.com/drdoctr/[email protected]
  Cloning git://github.com/drdoctr/doctr.git (to revision 1.7.4) to /tmp/pip-req-build-7r_gfskr
  Running command git clone --filter=blob:none -q git://github.com/drdoctr/doctr.git /tmp/pip-req-build-7r_gfskr
  fatal: unable to connect to github.com:
  github.com[0: 140.82.113.3]: errno=Connection timed out

I don’t understand what the syntax “git+git://github.com/drdoctr/[email protected]” means.  I have used https://github.com for https access and mailto:git at github.com for ssh access, but I have not seen git://github.com outside of this travis script. Can someone explain?  

I found that if I replace git:// with https:// it works.

   - pip install git+https://github.com/drdoctr/[email protected]
   - pip install git+https://github.com/michaeljones/[email protected]
   - pip install git+https://github.com/return42/linuxdoc.git

What the difference between git:// and https:// is, and is OK to make this change?

Thanks,
Mark

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System