git rebaseis only for terrorists. 🥸Also for me when I’ve been drinking and committed some really stupid shit into the repo. No one needs to know what I really think of my team members.
Yeah totally merge everything, people like a good spaghetti salad.
spaghetti salad
Found the German :D
Rebasing is for noobs.
git reset head~42 git push -fHoly shit
I used to only merge. Now I rebase. The repo is set up to require squash and rebase when going to main.
All the garbage “spelled thing wrong” and “ran formatter” commits go away. Main is clean and linear.
Squash and rebase or squash or rebase?
…and? You squash so all your gross “isort” “forgot to commit this file” “WIP but I’m getting lunch” commits can be cleaned up into a single “Add endpoint to allow users to set their blah blah” comment with a nice extended description.
You then rebase so you have a nice linear history with no weird merge commits hanging around.
Okay honest question, when you merge a PR in GitHub and choose the squash commits box is that “rebasing”? Or is that just squashing? Because it seems that achieves the same thing you’re talking about.
There’s two options in the green button on a pr. One is squash and merge, the other is squash and rebase.
Squashing makes one commit out of many. You should IMO always do this when putting your work on a shared branch
Rebase takes your commit(s) and sticks them on the end.
Merge does something else I don’t understand as well, and makes a merge commit.
Also there was an earthquake in NYC when I was writing this. We may have angered the gods.
Lmao I’m in the NYC area and my whole house shook. I’m right there with you. Thanks for the explanation!
You should IMO always do this when putting your work on a shared branch
No. You should never squash as a rule unless your entire team can’t be bothered to use git correctly and in that case it’s a workaround for that problem, not a generally good policy.
Automatic squashes make it impossible to split commit into logical units of work. It reduces every feature branch into a single commit which is quite stupid.
If you ever needed to look at a list of feature branch changes with one feature branch per line for some reason, the correct tool to use is a first-parent log. In a proper git history, that will show you all the merge commits on the main branch; one per feature branch; as if you had squashed.Rebase “merges” are similarly stupid: You lose the entire notion of what happened together as a unit of work; what was part of the same feature branch and what wasn’t. Merge commits denote the end of a feature branch and together with the merge base you can always determine what was committed as part of which feature branch.
I don’t want to see a dozen commits of “ran isort” “forgot to commit this file lol” quality.
Do you?
Having the finished feature bundled into one commit is nice. I wouldn’t call it stupid at all.
Note that I didn’t say that you should never squash commits. You should do that but with the intention of producing a clearer history, not as a general rule eliminating any possibly useful history.
You squash so all your gross “isort” “forgot to commit this file” “WIP but I’m getting lunch” commits can be cleaned up
The next step on the Git-journey is to use interactive rebasing in order to never push these commits in the first place and maintain a clean history to be consumed by the code reviewer.
Squashing is still nice in order to have a one-to-one relationship between commits on the main branch to pull requests merged, imo.
Okay this is the second time I’ve seen Sydney Sweeney referenced in a meme in less than half a day. I had never heard of her before. Who is she, and why is she suddenly attracting so much meme attention?
She’s an
AustralianAmerican actress who blew up last year (she was in euphoria I think?), expect to see her in a ton of upcoming blockbusters.Her blown up remains you mean?
Yeah, I had a feeling that was not the best way to put it but I was in a hurry :)
She was excellent in the first season of White Lotus on Sky too. Great show.
She also has a pair of massive blockbusters
She is from Spokane Washington not Australia. She got a lot of recognition for her role in Euphoria and is blowing up a bit right now because she is a young, attractive, talented actress.
You are probably thinking of another talented blonde Australian actress.
Pretty sure Radha Mitchell only does front end development.
How dare you speak to Margot Robbie like that
Two reasons.
She’s an American actress who was in Handmaid’s Tale and a few other things and then blew up thanks to her role in Euphoria. She’s become a bit of a meme recently because online conservatives think that her boobs are anti-woke
What a bizarre story. Mr. W is me right now:
git merge --no-ffgit config --global merge.ff no
I personally prefer “git off my lawn”
Ah, yes, the good old
git off --my lawncommand.
Rebase feature branch, merge commit into
main(NO SQUASH).make the commit message be “we’ve fixed bugs and improved performance. to experience the newest features and improvements, checkout the latest version of the branch.”
great new features
Jia Tan
I’ve been using merge, and I hate that I don’t even know what rebase really does
Merge takes two commits and smooshes them together at their current state, and may require one commit to reconcile changes. Rebase takes a whole branch and moves it, as if you started working on it from a more recent base commit, and will ask you to reconcile changes as it replays history.
That’s pretty cool, might actually do that. Tho, we currently don’t use the history as much anyways, we’re just having a couple of small student projects with the biggest group being 6 people. I guess it’s more useful if you’re actually making a real product in a huge project that has a large team behind it
I wouldn’t recommend it. The Git documentation itself doesn’t recommend rebase for more than moving a few unpushed commits to the front of a branch you are updating. Using it by default instead of merge requires you to use --force-push as part of your workflow which can lead to confusing situations when multiple developers end up commiting to the same branch, and at worst can lead to catastrophic data loss. The only benefit is a cleaner history graph, which is rarely used anyway, and you can always make the history graph easier to read with a gui without incuring any of the problems of rebase.
Bad take IMO,
At 10+ YOE, I use rebase almost exclusively. Branch from main, rebase to clean up commit history before putting up a PR. If commits are curated properly you don’t run into conflicts very often. Branches really shouldn’t be shared too often anyway, and the ones that are should be write protected.
Catastrophic data loss isn’t really possible either with git since it’s all preserved and you can
git reflogeven if you mess up.The meme is right. Git good
When rebasing, it applies the changes without the commit history?
Does that mean that when you fast forward your main/dev branch and commit, you then add a single commit that encompasses every changes that were rebase?
No, there are no fast-forwards with rebasing. A rebase will take take the diff of each commit on your feature branch that has diverged from master and apply those each in turn, creating new commits for each one. The end result is that you have a linear history as though you had branched from master and made your commits just now.
If you had branched like this:
A -> B -> C (master) \ \ -> D (feature)It would like this after merging master into your feature branch:
A -> B -> C (master) -> E (feature) \ / \ -> D -------------------> /And it would like this if you instead rebased your feature branch onto master:
A -> B -> C (master) -> D' (feature)This is why it’s called a “rebase”: the current state of master becomes the starting point or “base” for all of your subsequent commits. Assuming no conflicts, the diff between
AandDis the same as the diff betweenAandD'.
Years of experience don’t really matter here, that’s just call to authority, in this case yourself. You might as well be the worst git user ever after 20 years of usage, or the best after 2. We don’t know that.
Anyway, what you’re saying basically requires a perfect world to be true. Feature branch flow is perfectly fine, but you do end up with merge conflicts constantly, unless you have cordoned off areas of the repo for certain users. Two people working on unrelated features, both change a signature of some helper/util method, merge conflict. Nothing serious, can be fixed in a minute, and rebasing or merging won’t help for either.
Merge is perfectly fine. And arguing about which strategy to use is one of those autistic debates we as an industry seemingly love to have. It doesn’t matter, but you’ll find people screaming at each other about it. See Emacs vs. Vi. Same crap.
Merge is fine, but not knowing both rebase and merge is dumb. And I guess I’ve been in a perfect world this whole time in huge technical orgs lol.
This a really bad take and fundamentally misunderstands rebasing.
First off, developers should never be committing to the same branch. Each developer maintains their own branch. Work that needs to be tested together before merging to master belongs on a dedicated integration branch that each developer merges their respective features branches into. This is pretty standard stuff.
You don’t use rebasing on shared branches, and no one arguing for rebasing is suggesting you do that. The only exception might be perhaps a dedicated release manager preparing a release or a merge of a long-running shared branch. But that is the kind of thing that’s communicated and coordinated.
Rebasing is for a single developer working on a feature branch to produce a clean history of their own changes. Rebasing in this fashion doesn’t touch any commits other than the author’s. The purpose is to craft a high quality history that walks a reader through a proposed sequence of logical, coherent changes.
Contrary to your claim, a clean history is incredibly valuable. There’s many tools in git that benefit significantly from clean, well-organizes commits.
git bisect,git cherry-pick… Pretty much any command that wants to pluck commits from history for some reason. Or even stuff likegit log -Lorgit blameare far more useful when the commit referenced is not some giant amalgamation of changes from all over the place.When working on a feature branch, if you’re merging upstream into your branch, you’re littering your history with pointless, noisy commits and making your MR harder to review, in addition to making your project’s history harder to understand and navigate.
1000 times this
Just remember to not combine it with force push or you’re in for some chaos (rewriting history team members have already fetched is a big no-no).
Facts. Force push belongs in Star Wars, and nowhere else.
Force pushes are perfectly safe if you’re working on your own branch, and even if you’re sharing a branch, you can still force push to it as long as you inform and coordinate with whoever else is working on that branch.
Or, you know, on your own feature branch to clean up your own commits. It’s much, much better than constantly littering your branch’s history with useless merge commits from upstream, and it lets you craft a high-quality, logical commit history.
You can do all that without force push. Just make a new branch and do the cleanup before the first push there. Allowing force push just invites disaster from junior developers who don’t know what they’re doing. If you want to clean up after them, that’s your business, I guess.
That’s exactly the same thing. A branch is nothing more than a commit that you’ve given a name to. Whether that name is your original branch’s name or a new branch’s name is irrelevant. The commit would be the same either way.
A junior cannot actually do any real damage or cause any actual issue. Even if they force push “over” previous work (which again, is just pointing their branch to a new commit that doesn’t include the previous work), that work is not lost and it’s trivial to point their branch to the good commit they had previously. It’s also a good learning opportunity. The only time you actually can lose work is if you throw away uncommitted changes, but force pushing or not is completely irrelevant for that.
Of course it has its uses. I didn’t mention them because the guy just learned about rebase - it’s unlikely to be applied flawlessly from the start.
I was replying to the other comment, not yours. Though there’s not really a way of using rebasing without force pushing unless it’s a no-op.
Rebasing is really not a big deal. It’s not actually hard to go back to where you were, especially if you’re using
git rebase --interactive. For whatever reason people don’t seem to get that commits aren’t actually ever lost and it’s not that hard to point HEAD back to some previous commit.
deleted by creator
I’m relatively new to git and rebase looks like a mess to me? Like it appears to be making duplicate commits and destroys the proper history?
If you use rebase to get a more readable history, isn’t the issue the tool you use to view the history?
I guess I have to try it out a few times to get it.
The commits aren’t duplicated, but applied to the main branch. Since git has commit ids, they won’t be re-rebased either.
What you probably mean by duplicate commits is that it assigns new commit IDs to commits that have been rebased. If you had already pushed those commits, then
git statuswill tell you that the remote branch and your local branch have diverged by as many commits as you rebased.Well, and what is the “proper history”? If your answer is “chronological”, then why so?
For the rare times that it matters when exactly a commit was created, they’ve got a timestamp. But otherwise, the “proper history” is whatever you make the proper history. What matters is that the commits can be applied one after another, which a rebase ensures.When you’re working on a branch and you continuously rebase on the branch you want to eventually merge to, then the merged history will look as if you had checked out the target branch and just made your commits really quickly without anyone else committing anything in between.
And whether you’ve done your commits really quickly or over the course of weeks, that really shouldn’t matter.What is really cool about (supposedly) making commits really quickly is that your history becomes linear and it tells a comprehensible story. It won’t be all kinds of unrelated changes mixed
randomlychronologically, but rather related commits following one another.
And of course, you also lose the merge-commits, which convey no valuable information of their own.you also lose the merge-commits, which convey no valuable information of their own.
In a feature branch workflow, I do not agree. The merge commit denotes the end of a feature branch. Without it, you lose all notion of what was and wasn’t part of the same feature branch.
Agreed, you also lose the info about the resolved merge conflicts during the merge (which have been crucial a few times to me).
Well, with a rebase workflow, there should be no merge conflicts during the final merge. That should always be a fast-forward.
Of course, that’s because you shift those merge conflicts to occur earlier, during your regular rebases. But since they’re much smaller conflicts at a time, they’re much easier to resolve correctly, and will often be auto-resolved by Git.
You’re still right, that if you’ve got a long-running feature branch, there’s a chance that a conflict resolution broke a feature that got developed early on, and that does become invisible. On the flip-side, though, the person working on that feature-branch has a chance to catch that breakage early on, before the merge happens.
This diagram seems wrong to me. Isn’t the second image a squash merge? Also why would rebasing a feature branch change main?
Yeah, the image (not mine, but the best I found quickly) kinda shows a rebase+merge as the third image. As the other commenter mentioned, the new commit in the second image is the merge commit that would include any conflict resolutions.
why would rebasing a feature branch change main?
the image does not update the feature branch. It merges the featurebranch into main with a regular old merge-commit on the main branch.
The only difference between a *rebase-merge and a rebase is whether main is reset to it or not. If you kept the main branch label on D and added a feature branch label on G’, that would be what @[email protected] meant.
Merge is taking all the code from the master branch and combining it with the task branch, resulting in a commit for just the merge itself.
Rebase is “re-basing” where your task branch was created from off the master branch. It essentially takes all the commits from master that happened since you branched, REWRITES THE HISTORY of your task branch by inserting those master branch commits before all your existing commits, and effectively makes your task branch look like it was branched yesterday instead of like 4 weeks ago. You changed where your task branch originated on the master. You moved its base.
Atlassian does a fantastic writeup on this.
So, with a merge you basically shuffle in the changes from both branches, but a rebase takes only the changes from one branch and puts it over the other? Edit: no. Read wrong. I should probably watch a vid about it or something
It inserts the master changes before the task branch ones.
So kinda like as if you had kept your branch synced the whole time?
Kind of. Both merge and rebase result in the branches “synced up” but they do it in different ways.
Merge is making a batter for cookies, having a bowl for dry ingredients (task branch) and a bowl for wet ingredients, (master branch) making them separately and then just dumping the dry bowl into the wet bowl (merge).
Rebase is taking a time machine back to before you started mixing the dry ingredients, mix all the wet ingredients first then add the dry ones on top of that in the same bowl.
It’s really hard to create an analogy for this.
I like rebase, it’s everyone else that hate it when I rebase
maintwice a day.Fuck a merge commit! Rebase ervray day bay bayyy.
Heres my based af workflow:
git checkout -b feature-branch
rebase on top of dev whilst working locally
git rebase origin/dev-branch && git push -f
if i need to fix conflicts with dev-branch during a PR
git merge origin/dev
I have been using something very similar to this. In my team I insisted on people without any git experience working on a separate local branch, than the feature branch
. To ensure screw ups are minimal, we pull and create a local feature branch and then a new local only dummy branch, on top of it. Once the team is more comfortable with git, I am planning to treat the local feature branch as a dummy branch.
So far things have been pretty neat. Spaghetti is no more with minimal conflicts.
I like the idea of it and there were times i used it correctly, but most of the time i do it wrong i guess.
do it often. you may end up with 150 conflicts to have to wade through.
I know how to use git pull, git push, git commit, git status and git add *. I don’t even know how git commit and git push works I just know you run them in that order. Whenever I break everything I give up and go outside.
Anyone mind explaining to me how
git rebaseis worth the effort?git mergehas it’s own issues but I just don’t see any benefit to rebase over it.I use interactive rebases to clean up the history of messy branches so they can be reviewed commit by commit, with each commit representing one logical unit or type of change.
Mind you, getting those wrong is a quick way to making commits disappear into nothingness. Still useful if you’re careful. (Or you can just create a second temporary branch you can fall back onto of you need up your first once.)
This 100%. I hate getting added to a PR for review with testing commits in the history, and I’m expected to clean those up before merging into main.
I feel like squash and merge on GitHub/GitLab is nicer for that anyway though, it makes the main branch so much cleaner automatically
If you’re using “trunk-based development” (everything is a PR branch or in main), this works great.
If you’re using GitFlow, it can make PRs between the major prod/dev/staging branches super messy. It would be nice if GitHub would let you define which merge strategies are allowed per-branch, but that’s not a thing (AFAIK). So you’re probably better off not squashing in this situation.
Well, rebase allows you to resolve the same conflict ten times in a row instead of doing it once. How cool is that?
Nope, you just need to do it once: https://git-scm.com/book/en/v2/Git-Tools-Rerere.
Why would I ruin all the fun?
Squash your branch first
Doesn’t this defeat the purpose, may as well merge then no?
Do not merge your unfinished stuff into main.
I don’t like merging main into my branch because I don’t understand git, and I feel like that can make a confusing history.
The way I structure my commits, it is usually (but not always) easier and more reliable for me to replay my commits one at a time on top of the main branch and see how each relatively small change needs to be adapted in isolation–running the full test suite at each step to verify that my changes were correct–than to be presented with a slew of changes all at once that result from marrying all of my changes with all of the changes made to the main branch at once. So I generally start by attempting a rebase and fall back to a merge if that ends up creating more problems than it solves.
