Understanding and memorizing git rebase parameters - Software Engineering Stack Exchange
git merge-base finds best common ancestor(s) between two commits to use in a three-way merge. to compute the merge base from, one is specified by the first commit argument on the Errors are signaled by a non-zero status that is not 1. a commit which is reachable from both A and B through the parent relationship. (Aside, the names of these arguments in rebase, "upstream" and "branch" What I want is to "move" these commits for bugfix so that they're no. This means that git rebase, alone, defaults to git rebase pdl-inc.info branch., as long as there already exists a configured.
Compute the corresponding changesets patches. Move HEAD to the new branch location base. Apply the changesets in order, making new commits preserving author information.
Finally, update the branch ref to point to the new tip commit. The most general form of the command is: The behavior of the default arguments to git rebase reveals the simplest use of rebasing: Before rebasing Following the preceding defaults, the simple command: After rebasing Your local commits 1, 2, and 3 have been shifted forward to remain based off the tip of the upstream master.
My approach to using Git, without the headaches
This is such a common use of rebasing for certain workflows that there is a --rebase option to git pull that runs git rebase in between its fetch and merge steps see Pull with Rebase. Undoing a Rebase The final step of a successful rebase is to repoint the ref of the branch being moved, from the old tip commit to the new one.
The original commits are not immediately expunged in any way, but merely abandoned: To undo the rebase operation, then, all you need to do is move the branch ref back to its original spot, which you can discover using the reflog.
After the git rebase, for example, your reflog would look something like this: In the earliest reflog entry, you can see when you made your original version of commit 3, with commit ID e3a1d5b0.
To return to that state, all you need to do is: Importing from One Repository to Another Suppose you would like to combine two repositories—say, to import the entire content of repository B as a subdirectory b of repository A. You could just copy the working tree of B into A and then add and commit it, of course, but you want to retain the history of repository B as well as the content. The Git history of each repository consists of an entire graph of individual content snapshots, branching and merging in possibly complex ways over time, and there are different ways in which you might want to combine the two.
In this section, we discuss a few of them. Importing Disconnected History The simplest way to combine two repositories is simply to import the whole commit graph of one into the other, without connecting them in any way.
See git-for-each-ref 1 for more detail on this handy command for Git automation.If You Fight With Your Spouse, You'll Want To Watch This
After the fetch command, Git has copied the entire commit graph of B into the object database of A, but the only references in A to the new branches are remote-tracking ones: To finish incorporating B into A, we need to make local branches for these. The --no-track option avoids creating unnecessary tracking relationships that would just be removed later.
We prefix the new branch names with B- since there may be clashes as here, where there is a master branch in each repository. A common ancestor that does not have any better common ancestor is a best common ancestor, i. Note that there can be more than one merge base for a pair of commits. More generally, among the two commits to compute the merge base from, one is specified by the first commit argument on the command line; the other commit is a possibly hypothetical commit that is a merge across all the remaining commits on the command line.
Git rebase no argument version vs one argument version - Stack Overflow
As a consequence, the merge base is not necessarily contained in each of the commit arguments if more than two commits are specified. This is different from git-show- branch 1 when used with the --merge-base option. This mimics the behavior of git show-branch --merge-base.
In other words, among the commits given, list those which cannot be reached from any other.
Don't git push
This mimics the behavior of git show-branch --independent. This is my favourite and most hated tool: I therefore have a strict rule when using it: And it works — I have never once chopped my arm off. An example, why not: And boom, master will be merged into my branch and the file will update right in front of my eyes.
This makes for a small-but-worthwhile reduction in context switching. Handling conflicts Having minimised the amount of time I spend interacting with Git day-to-day, the only thing left to address is the dreaded merge conflict.
Git - git-branch Documentation
I imagine these people also make their own pasta and cut their lawn with scissors. Have you not heard of the lawn mower? Invented by Edwin Budding in ? I never got around to learning how to use one. Come to my place right now.