git-sync

git-sync

#!/bin/bash

#
# Description:
#
#   Synchronises the local repository with _all_ the configured remotes
#
#   Optionally, it will safely perform a rebase of the checked out branch
#   with it's corresponding tracking (remote) branch
#
#   NOTE: remote branches which have been removed are pruned locally
#
# Usage:
#
#   git sync
#   git sync --rebase
#

# fail fast
set -e

if [[ ! -d .git ]]; then
  printf "\033[1;31mERROR\033[0m: Run this script from the project root which contains the .git directory.\n"
  exit 1
fi

# option to perform rebase after fetching updates
rebase=${1}

# check for remotes
remotes=$(git remote | head -1)

if [[ -z "$remotes" ]]; then
  printf "\n\033[1;33mWARNING:\033[0m Skipping, no remotes defined.\n"
  exit 1
fi

# fetch for all defined remotes
# and prune remote branches which have been removed
git fetch --all --prune 2>&1

# sometimes git needs to rebuild it's index
git status &> /dev/null

if [[ "$rebase" == "--rebase" ]]; then

  # check for uncommitted changes
  changes=$(git diff-index --name-only HEAD -- | tr -d '[:space:]')

  if [[ -n "$changes" ]]; then
    echo
    printf "\033[1;31mERROR\033[0m: There are outstanding changes. Skipping rebase.\n"
    echo
    git status 2>&1
    echo
    exit 1
  fi

  # get tracking branch
  tracking=$(git rev-parse --abbrev-ref --symbolic-full-name @{u} 2>&1 || echo "")

  if [[ -n "$tracking" ]]; then
    printf "\033[1;32mINFO\033[0m: Rebasing off \033[1m$tracking\033[0m branch.\n"
    git rebase $tracking 2>&1
  else
    printf "\033[1;33mWARNING\033[0m: Skipping rebase, no configured tracking branch.\n"
  fi

fi