[RFC][GSoC Proposal Draft] clone: bundle-uri: make it resumable

[Khalid Masum <khalid.masum.92@gmail.com>]

Hello!

This is my draft proposal to implement resumable bundle-uri clone.

I would love to hear your thoughts on this.  Also, I think the timeline 
section

could be improved amd I need your input on that.


thanks,

  -- Khalid Masum


======================================================
GSoC23 Draft Proposal: Resumable cloning with git bundle
======================================================

Overview:
=========
Currently, git clones are not resumable. But there is a workaround using
git bundles, where the user can `wget -c` the bundle, then clone from it.
However this comes with drawbacks that `git clone` does not have. For
example, with git clone we can specify branch, or send authentication 
credentials,
which we can not do with `wget` in a simple manner.

However with the new `bundle-uri` we should be able to add this feature.

As suggested by Derrick Stolee <derrickstolee@github.com> here:

https://lore.kernel.org/git/7097d1d6-00a1-2a82-1923-610d41f4053f@github.com/

Where it is suggested that, the randomized temporary download files 
could be
renamed with hashed url, enabling the ability to have resumable clone.

Deliverables:
=============
- Ability to resume a cloning process with bundle-uri.
- Testcases for the newly added feature.
- Update on documentation for the newer changes.

Timeline:
=========
Before April 25:
     - Familiarize myself with git's codebase and architecture.
     - Making small contributions to git.

Before May 25:
     - Research and familiarize with git bundle and git object download
       process.
     - Understanding the core implementation of git bundle.
     - Communicate with mentors for further understanding and finding 
ways of
       implementation.

May 26 - June 20:
     - Starting to implement the git bundle-uri resumable feature.
     - Refactor the codebase for necessary integration.
     - Write some of the test-cases for the created modules.

June 21- July 20:
     - Finish implementing the feature.
     - Necessary test cases are implemented and reviewed.
     - Document the changes.

July 21 - Aug 10:
     - Finishing touches, making sure everything is stable.

Aug 11- 27:
     - Buffer period for any unexpected events.
     - Final report writing.
     - Project submission

Contributions
==============
Microproject:
-------------
Modernized test script: t3501
Link: 
https://lore.kernel.org/git/20220405150657.19801-1-khalid.masum.92@gmail.com/
Status: Accepted

Other contributions:
--------------------
Patch review: 
https://lore.kernel.org/git/pull.1474.git.git.1679233875803.gitgitgadget@gmail.com/

Motivation:
===========
I am captivated by the engineering behind Git and aspire to contribute
regularly to the project, impacting its features. I view GSoC as an
excellent opportunity to jumpstart my contributions and deepen my
understanding of software engineering.

Conclusion:
===========
Implementation of resumable clone is a long wanted feature in git
since 2011. With this contribution I believe we will be able to be
closer to this goal, or at least get a very good workaround on this
feature.