git essentials

last updated: 21 Aug 2019

git config

unique local config for a repo:

three layers of git username and useremail can be set (more with the right config settings)

local for the repository:

git config --local user.name "local-user-name"

current login user of the OS

git config --global user.name "global-user-name"

any project made on the machine
```
git config --system user.name "system-user-name"
```
you will see a user.name and user.email entries when you do

git config --list

this most likely is the global setting, especially if you haven’t set these to a local value before. set them specifically for the local repository using

git config --local user.name "repo-specific-user-name"
git config --local user.email "repo-specific-login-email"

unset a set value - example to remove a local user.email

git config --local --unset user.email

view git config file:

navigate to app’s root directory and review current config settings

git config --list

rebasing

make current commit the initial commit
helpful in purging long history of commits which you will never go back to

git checkout --orphan newBranch
git add -A  # Add all files and commit them
git commit
git branch -D master  # Deletes the master branch
git branch -m master  # Rename the current branch to master
git push -f origin master  # Force push master branch to github
git gc --aggressive --prune=all     # remove the old files

change remote origin URL

in the following is the syntax to change the url of the remote named origin to https://github.com/USERNAME/REPOSITORY.git

$ git remote set-url origin https://github.com/USERNAME/REPOSITORY.git

setting local repo to use http path to push

git push -u origin master throws an error saying the remote repo doesn’t exist
use following to set explicitly set HTTP path to push the local repo

git config --global credential.useHttpPath true

force push master to remote origin

sometimes the master branch on the remote is broken
and git pull will over write local changes
the time spent on fixing a merge is pointless and
you’re the only one working on the repo

git push origin master -f