branch

A branch is a pointer to a commit object.

git branch Shows the local branches. The current is highlighted with an Asterisk *.
git branch -a Shows the local and remote branches.
git checkout someBranch Switches to someBranch, moves HEAD to someBranch, leaves the current branch as it is. This command may change the contents of the working tree.
git clone git@gitlab.desy.de:tango-ds/Misc/Migration.git Clones all branches of a remote repo.

git checkout -b desy3.4.3.X remotes/origin/desy3.4.3.X Checkout a specific remote branch.

Context:

 

git commit -a -m "9.1.2024, prepare to go to remotes/origin/desy3.4.3.X"
  update the current branch (desy3.0.4.X)

git fetch --all 
  fetch all branche

git checkout -b desy3.4.3.X remotes/origin/desy3.4.3.X

git diff > diff.lis
(git apply src/sardana/macroserver/recorders/diff.lis, did not work)

git merge someBranch merging, git checkout main followed by git merge someBranch merges someBranch into main. If there are conflicts, edit the relevant files, then make an 'add'

git checkout -b someBranch Creates a branch and switches to it, e.g:

git checkout -b main
git push origin main
git push --set-upstream origin main 
  yes this is needed otherwise this error appears:
  $ git push
    fatal: The current branch main has no upstream branch.
    To push the current branch and set the remote as upstream, use
    git push --set-upstream origin main

change the default branch of a project:
When creating a project at gitlab.des.de the branch main is created by default. Use the procedure describes above to create the main branch. Then make main the default branch:
```
 
Select Settings > Repository.
Expand Branch defaults. For Default branch, select a new default branch.
Select Save changes.
```

protect the branch

 
Select Settings > Repository.
Expand Protected branched. 
Chose
  Allowed to merge:          Developers + Maintainers
  Allowed to push and merge: Developers + Maintainers

Select Save changes.

git branch -d someBranch Deletes a someBranch.
```
git branch -d someBranch
git push origin -d testbranch
```
The second command deletes the branch also on the remote repo.
git branch someBranch Creates a new branch, a pointer to the current commit. HEAD still points to the current branch.
git checkout tags/v0.10.0 -b v0.10.0 Creates branch corresponding to a tag. To fetch tags from the repository use:
```
git fetch --all --tags
```
git checkout -b someBranch 33dbb94b5 Creates branch to a specific commit and switches to it.
git branch -v See the last commit on each branch.
git log ––oneline ––decorate ––graph ––all Inspects the all branches.
git log ––decorate Shows HEAD, main, etc optionally with '––oneline'.