GIT useful commands

git-cheats.sh

#!/bin/bash

# Get root folder path of the project under git
# Output: /Users/oleksandr.kucherenko/projects/klarna-app
git rev-parse --show-toplevel

# Get latest commit hash
# Output: 1b03718dabad03aaef917eff3ea8bb15e4fa1c46
git rev-parse @

# List branches with specific commit
# Output: list of branches
git branch -r --contains $(git rev-parse @)

# Get current branch name
# Output: master
git rev-parse --abbrev-ref @

# alternative syntax to written above. is commit in master branch?
# Output: 
#  origin/HEAD -> origin/master
#  origin/master
git rev-parse @ | xargs -I _ git branch -r --contains _ | grep master

#
# Update master branch without switching to it
#
git fetch origin master:master --tags

#
# Update list of available branches from remote repo (prune/delete old branches)
#
git remote update origin --prune

###
### Bash hacks
### 

# Get user name with fallback: $LDAP_USERNAME -> $AD_USERNAME -> $USER
SLACK_USERNAME=${LDAP_USERNAME:-${AD_USERNAME:-${USER}}}