Thanks but I already tested those:
Refspec: refs/heads/main
Honor refspec on initial clone: enabled
Shallow clone: enabled
Shallow clone depth: 1
They download a little less : 1.8 GB
The credit goes to the shallow clone option. The Honor refspec option does not
seem to make any difference. Even the commands seem to be unaffected by it.
Maybe the refspec option is missing from the GUI? The example on the web has it.
Regards,
David Balažic
Lead engineer
Endava
From: jenkinsci-users@googlegroups.com <jenkinsci-users@googlegroups.com> On
Behalf Of Mark Waite
Sent: Friday, 26 May 2023 14:17
To: Jenkins Users <jenkinsci-users@googlegroups.com>
Subject: Re: git plugin, use --single-branch option to save disk space?
CAUTION - EXTERNAL EMAIL
On Friday, May 26, 2023 at 5:46:34 AM UTC-6 David Balazic wrote:
Hi!
With the git plugin, is there a way to clone a repo with the --single-branch
option?
We have a freestyle job wit a Git source code, where we specify the branch as:
refs/heads/main
And when the build is done, the cloned repo (the .git folder) is very big,
about 2.6 GB.
We use a command line git implementation
(gitforwindows.org<http://gitforwindows.org/> 2.40.1).
Using command line to clone gives this values:
git clone --branch main https://server.example.com/foo/bar "C:\tmp\git
test\test_xxx_branch_main"
git clone --single-branch --branch main https://server.example.com/foo/bar
"C:\tmp\git test\test_xxx_branch_main_single"
The first creates a 2.6 GB .git folder, while the second a 70 MB sized .git
folder.
They both also have about 120 MB of working tree files.
So about 2.4 GB is "wasted" due to unneeded cloned branches.
Is there a way to make the Jenkins git plugin to clone only the required
branches?
Yes, you can match the behavior of the --single-branch argument to git clone
with the Jenkins git plugin.
Configure a refspec that matches a single branch in the remote configuration
section.
Enable "Honor refspec on initial clone"
Those options are described in a git plugin Pipeline
example<https://github.com/jenkinsci/git-plugin#checkout-with-a-narrow-refspec>.
If you don't need the history of the repository in your job, you can reduce the
size even further by using a shallow clone that only retrieves the most recent
commit.
That option is also described in a git plugin PIpeline
example<https://github.com/jenkinsci/git-plugin#checkout-with-a-shallow-clone-to-reduce-data-traffic>.
You can reduce disc use even further if you have a copy of the remote
repository already available on the agent. Then you can use a reference
repository. Reference repositories are generally not helpful when using
shallow clone, since the reference repository may not include many of the
changes in the shallow clone.
A 10-15 minute video<https://youtu.be/jBGFjFc6Jf8?t=6434> discussing various
performance improvement options is also available if you prefer video.
Mark Waite
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