Git

Cheet Sheet

git config credential.helper store git config user.email "email@example.com" git config user.name "username"

Speed-up

# alias 'acp' = add+commit+push
git config --global alias.acp '!f() { git add . && git commit -m "$@" && git push; }; f'         
git acp "this is my commit comment"

Basics

Create repository

git init             # standard 
git init --bare      # bare without working directory

Initial checkout of remote repository

git clone https://gerrit.wikimedia.org/r/p/mediawiki/core.git
git clone ssh://user@server/srv/git/git-repo.git

Get latest updates from server

git pull
(git fetch && git merge)

Change files and commit

• show changed files

git diff --cached --name-only
git diff --name-status

• add files

git add *

• commit changes

git commit -m "Commit message"
git commit -a                      # includes add
git commit -am.

• send changes to server

git push

.gitignore files

*.log
filename.txt
subfolder/*

Branches

hard reset to specific branch

git fetch --all
git reset --hard origin/branchname

Repositories

move repo to new server

on client:
git remote set-url origin <URL to my NEW repo location>
git push -f origin

sparse clone (only specific folder)

mkdir <repo>
cd <repo>
git init
git remote add -f origin <url>
git config core.sparseCheckout true
echo "some/dir/" >> .git/info/sparse-checkout
git pull origin master

Configuration

Store credentials

git config credential.helper store

Set username and email

git config --global user.email "you@example.com"
git config --global user.name "Your Name"

Windows - remove old credentials

rundll32.exe keymgr.dll,KRShowKeyMgr

post-receive hook

• execute script on main git server, after receiving push: hooks/post-receive

#!/bin/bash
# unset GIT_INDEX_FILE # not needed for post-receive?
git --work-tree=/srv/targetfolder --git-dir=/home/demo/proj/.git checkout -f

or

#!/bin/bash
while read oldrev newrev ref
do
    if [[ $ref =~ .*/master$ ]];
    then
        echo "Master ref received.  Deploying master branch to production..."
        git --work-tree=/var/www/html --git-dir=/home/demo/proj checkout -f
    else
        echo "Ref $ref successfully received.  Doing nothing: only the master branch may be deployed on this server."
    fi
done

• make executable

chmod +x post-receive

Links

• https://www.digitalocean.com/community/tutorials/how-to-set-up-automatic-deployment-with-git-with-a-vps
• https://gist.github.com/noelboss/3fe13927025b89757f8fb12e9066f2fa
• https://gist.github.com/thomasfr/9691385

Other

Special features

• auto-commit when file changes

inotifywait -q -m -e CLOSE_WRITE --format="git commit -a -m 'autocommit on change' %w" file.txt | sh

or

while true; do
  inotifywait -qq -e CLOSE_WRITE ~/.calendar/calendar
  cd ~/.calendar; git commit -a -m 'autocommit on change'
done
# inotify "-r"  for recursive

or

• etckeeper or gitwatch