hs.hsadmin.ng/bin/git-pull-and-run-if-origin-changed

#!/bin/bash

if [ -z "$1" ]; then
  echo "command missing in arguments" >&2
  exit 1
fi

shopt -s expand_aliases
source .aliases

# get the current branch name
BRANCH=$(git rev-parse --abbrev-ref HEAD)

while true; do

  # get the latest commit hashes from origin and local
  git fetch origin
  LOCAL=$(git rev-parse HEAD)
  REMOTE=$(git rev-parse origin/$BRANCH)

  # check if the local branch differs from the remote branch
  if [ "$LOCAL" == "$REMOTE" ]; then
    echo "pulling changes from origin"
    git pull origin $BRANCH

    # run the command
    echo "Running $*"
    "$@"
  else
    echo "no changes detected on the origin branch"
  fi

  echo "waiting for 1 minute before checking again..."
  sleep 60
done