1:23 git is fundamentally a *content-addressable filesystem* with VCS (version control system) under user interface written on top of it 4:51 git internals 5:06 the *first level* of the *git module* - *blob* 5:24 7:59 what a blob is: 9:25 git commit 9:55 3 fundamental types of git objects 10:01 blob 10:10 *tree* - points to the blob 14:10 refs, branches and tags 14:45 *ref* - *a pointer to an object* 14:50 on the simplest level, it is just a file with a string in it 15:23 *branch -* 16:40 *tag*
19:28 git reset - 19:40 *manipulate a tag or ref* 19:49 what it does is *move* that *pointer back down the tree* 21:01 how do you get back to that previous state. say you've made a mistake here 21:06 you've done a reset 21:40 *git reflog* 23:30 git gc 40:41 get back to the previous status
Smart guy. Clear explanation and understandable. Really the basics which every git user should know . I like this phrase at 4:07 ---> " Once you realize internal model, you realize what commands must exist".
Extremely good git talk -- Up through 14:13, some clarification: touching an empty file, may change timestamp, but will not change blob hash inside your git init;
This talk isn't the most friendly introduction to understanding Git, especially if you're new to Git, but it's useful to have a technical, in-depth look at it Git in a video format since it's easier to grasp than reading a massive blog post.
Very good information, very well done slides. A minor ciritc: Sometimes it's very hard to audibly understand the presenter, due to extreme talking speed.
The way I learned git there were FOUR basic objects in git: the three you mentioned and the fourth are hard tags (git tag -a tag name). Has this changed?
"reset manipulates a ref" - which one? "git reset --hard feature^" - what is "feature" in this context? arrow with the word "feature" moves back one commit - what does the "feature" arrow represent? "hard completely destroys this and checks it out again" - destroys what? "reset manipulates the branch head" - what is a head? "^ means parent" - parent of what? "the reason I do prune all is because I'm forcing the situation" - huh? "merges keep the context of the feature's commits" - what context? By "feature" do you mean branch? "a ff merge shifts the head forward as if nothing happened" - nothing happened? A topic this complex demands more concise language.
Very informative presentation. Slides can be found: www.slideshare.net/tarkasteve/knowledge-is-power-getting-out-of-trouble-by-understanding-git I found "reflog + reset = redo" slide very helpful. See minute 40:00
![Megan Thee Stallion - Neva Play (feat. RM) [Official Video]](http://i.ytimg.com/vi/TpYTyAaTRts/mqdefault.jpg)
1:23 git is fundamentally a *content-addressable filesystem* with VCS (version control system) under user interface written on top of it
4:51 git internals
5:06 the *first level* of the *git module* - *blob*
5:24
7:59 what a blob is:
9:25 git commit
9:55 3 fundamental types of git objects
10:01 blob
10:10 *tree* - points to the blob
14:10 refs, branches and tags
14:45 *ref* - *a pointer to an object*
14:50 on the simplest level, it is just a file with a string in it
15:23 *branch -*
16:40 *tag*
29:03 git merge
29:40 *git cat-file* to see the tenet of merge
32:20 different merge strategies
37:57 git rebase
39:52 git reset --hard
19:28 git reset - 19:40 *manipulate a tag or ref*
19:49 what it does is *move* that *pointer back down the tree*
21:01 how do you get back to that previous state.
say you've made a mistake here 21:06 you've done a reset
21:40 *git reflog*
23:30 git gc
40:41 get back to the previous status
Smart guy. Clear explanation and understandable. Really the basics which every git user should know . I like this phrase at 4:07 ---> " Once you realize internal model, you realize what commands must exist".
Extremely good git talk -- Up through 14:13, some clarification: touching an empty file, may change timestamp, but will not change blob hash inside your git init;
This is one of the best git talks I've seen, it deserves way more views.
This talk isn't the most friendly introduction to understanding Git, especially if you're new to Git, but it's useful to have a technical, in-depth look at it Git in a video format since it's easier to grasp than reading a massive blog post.
I'm very sad that the arrows point the wrong way round. 😥 Advanced talks should have them point from child to parent.
Are you blind?
29:21 Nice talk. The arrows are messed up.
That would be Emma Jane Hogbin Westby. 3/4 is still a respectable score, and that name has good inherent error correction via its low collision rate.
Thank you for the excellent presentation!
Well said. "Just remember the commands and type it ". :)
Very good information, very well done slides. A minor ciritc: Sometimes it's very hard to audibly understand the presenter, due to extreme talking speed.
Excellent !!!
The way I learned git there were FOUR basic objects in git: the three you mentioned and the fourth are hard tags (git tag -a tag name). Has this changed?
+Marty Turner There are tags, yes, but intros tend not to mention them as they aren't required for understanding the model.
Good work. Thank you.
"reset manipulates a ref" - which one?
"git reset --hard feature^" - what is "feature" in this context?
arrow with the word "feature" moves back one commit - what does the "feature" arrow represent?
"hard completely destroys this and checks it out again" - destroys what?
"reset manipulates the branch head" - what is a head?
"^ means parent" - parent of what?
"the reason I do prune all is because I'm forcing the situation" - huh?
"merges keep the context of the feature's commits" - what context? By "feature" do you mean branch?
"a ff merge shifts the head forward as if nothing happened" - nothing happened?
A topic this complex demands more concise language.
Very informative presentation. Slides can be found: www.slideshare.net/tarkasteve/knowledge-is-power-getting-out-of-trouble-by-understanding-git
I found "reflog + reset = redo" slide very helpful. See minute 40:00
He references this video:
Teaching People Git, Emma Jane Hogbin Westby - Git Merge 2015
th-cam.com/video/xYhHi8yK-Is/w-d-xo.html
nice
nice content but he does not speak very clearly :( it's very hard to understand him