Generate git repo for testing commands

git_test.sh

#!/bin/bash

set -e

DIR="/tmp/test-merge"

if [ -d "$DIR" ]; then 
	rm -rf "$DIR"
fi

mkdir -p $DIR && cd $DIR

git init

git config --local user.email "person@example.com"
git config --local user.name "Merge Tester"
# In merge conflict diff3 shows : your local changes, the 
# original file and the remote changes.
git config --local merge.conflictstyle diff3
git config --local merge.tool vimdiff
git config --local mergetool.prompt false

touch file

git add -A && git commit -m 'First commit'

printf "The quick brown fox jumps over the lazy dog\n" > file

git add -A && git commit -m 'Add content file'

git checkout -b wip-branch && git checkout wip-branch

printf "The quick brown bear jumps over the lazy dolphin\n" > file
printf "Eppur si muove\n" >> file

git add -A && git commit -m 'Change file'

git checkout master

printf "Some new content\n" >> file

git add -A && git commit -m 'Add new lines'

# here you should have a merge conflict:
git merge wip-branch

### `git mergetool` using
### Source: https://stackoverflow.com/a/163659
### +----------------------+
### |       |      |       |
### |LOCAL  |BASE  |REMOTE |
### |       |      |       |
### +----------------------+
### |      MERGED          |
### |                      |
### +----------------------+
### LOCAL – this is file from the current branch
### BASE – common ancestor, how file looked before both changes
### REMOTE – file you are merging into your branch
### MERGED – merge result, this is what gets saved in the repo
### Get changes from 
### 	REMOTE   `:diffg RE`
###     BASE     `:diffg BA` 
###     LOCAL    `:diffg LO`
### `:wqa` save and exit from vim
### `git commit -m "message"`
### `git clean` Remove extra files (e.g. *.orig) created by diff tool.