[HN Gopher] Show HN: ugit - Learn Git Internals by Building Git ...
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Show HN: ugit - Learn Git Internals by Building Git in Python
Author : nikital
Score : 119 points
Date : 2020-09-18 15:22 UTC (7 hours ago)
(HTM) web link (www.leshenko.net)
(TXT) w3m dump (www.leshenko.net)
| codesections wrote:
| This strikes me as a cool and polished version of shit, the Git
| implementation Drew DeVault did in pure POSIX shell.
| https://git.sr.ht/~sircmpwn/shit
| narwally wrote:
| I definitely agree that having a good understanding of git's
| internals is a must for using it to its full potential. I'm not
| sure you have to go as far as implementing it yourself, but it is
| a sure fire way to get there. For me it didn't all click into
| place until I understood the data model behind git[1]. A git
| project is just one big DAG of objects, and each object at its
| core is either a blob, a tree, or a commit. When you understand
| that, you can start to view every git command for what they
| actually are, a sequence of operations on this data structure.
|
| [1] relevant xkcd: https://xkcd.com/1597/
| srathi wrote:
| Awesome. I did the same while learning both Golang and git, and
| implemented parts of git in Golang. [0]
|
| [0] https://github.com/ssrathi/gogit
| Conlectus wrote:
| Looks neat! This reminds me heavily of the excellent Building Git
| by James Coglan[1].
|
| From a cursory glance though, it doesn't seem to support reading
| packfiles. This was the big thing that prevented me from using a
| fully custom Git implementation when I wrote my git churn
| calculator[2]. For larger repositories, it seems that almost all
| files are stored in packfiles, rather than the conceptually
| simpler "loose" format.
|
| For me, the most valuable resource was reading the Git / libgit2
| source and reference documentation.
|
| [1] https://shop.jcoglan.com/building-git/
|
| [2] https://github.com/samdoiron/butter
| microtherion wrote:
| Seconding the recommendation for "Building Git", one of the
| most lucid and edifying books I've read in recent years.
| nikital wrote:
| Thanks! Note that ugit isn't supposed to be a custom compatible
| Git implementation, but rather a simplified Git-like
| implementation for teaching Git concepts. So even if ugit
| supported packfiles, it still won't be able to read a real Git
| repo.
| SomaticPirate wrote:
| Reminds me of https://codecrafters.io/challenges
| numbers wrote:
| Looks great! I'm wondering if there are other tutorials like this
| but for Ruby?
| pokstad wrote:
| The defacto version was in Ruby:
|
| https://shop.jcoglan.com/building-git/
| ravenide wrote:
| Is this tutorial interface (navigation, diffs, files/downloads at
| each step) custom made? It's pretty nice for this kind of format.
| travmatt wrote:
| I was wondering the same, this format feels extremely intuitive
| for the material it explores. Looking at the HTML and the CSS
| class names I'd assume it was handmade, but it seems like
| standardizing this format or even generating this webpage
| format from a repo would be a useful tool. The comment left at
| the end is ambiguous as to whether it refers to the tutorial or
| the website as a whole.
| at_a_remove wrote:
| Maybe _this_ is what I need to like git.
| dimator wrote:
| Polished presentation! I like to learn from first principles, so
| this is perfect.
|
| There is also write you a git: https://wyag.thb.lt/
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(page generated 2020-09-18 23:01 UTC)