Sync git branch + changes from one machine to another continuosly

sync.sh

#!/usr/local/bin/bash

USAGE=$'Usage: sync.sh <user@host> <dest_dir> e.g ./sync.sh user@host \'~/dest_dir\''
SSH_HOST=${1:?$USAGE}
DEST_DIR=${2:-"~/`basename $PWD`"}

sync_files() {
  declare -A file_hash_map
  while IFS= read -r file; do
    file=${file#"$PWD/"} # get relative path
    if [ -f $file ]; then
      file_hash=`md5 -q $file`
      # if file's md5 hash sum is different then last time, copy it
      if [ "${file_hash_map[$file]}" != "$file_hash" ]; then
        echo `date +%r` "Updating $file"
        (time scp -C -q $file $SSH_HOST:$DEST_DIR/$file) 2> >(grep real)
        file_hash_map["$file"]=$file_hash
      fi
    elif [ -d $file ]; then
      # if it's a directory then recursively copy it
      echo `date +%r` "Copying dir $file"
      (time scp -C -r -q $file $SSH_HOST:$DEST_DIR/$file) 2> >(grep real)

    elif [ ! -e $file ]; then
      # if file or dir doesn't exist locally, then delete it on ssh host too
      echo `date +%r` Deleting $file
      unset file_hash_map["$file"]
      (time ssh -n $SSH_HOST "rm -rf $DEST_DIR/$file") 2> >(grep real)
    fi
  done
}

##########
## MAIN ##
##########

LOCAL_BRANCH=`git rev-parse --abbrev-ref HEAD`

# Don't push to master branch. Make the user do it if they really want it
if [ $LOCAL_BRANCH != 'master' ]; then
  echo `date +%r` "Pushing local to origin/$LOCAL_BRANCH"
  git push -f
else
  echo `date +%r` "!! Skipped pushing to origin/$LOCAL_BRANCH !!"
fi

echo `date +%r` "Updating $SSH_HOST:$DEST_DIR to origin/$LOCAL_BRANCH"
ssh $SSH_HOST "(cd $DEST_DIR; git fetch origin -p; git checkout -f $LOCAL_BRANCH; git reset --hard origin/$LOCAL_BRANCH; git clean -df)"

# Checkout changes from another branch if defined
if [ $BRANCH_2 ]; then
  BRANCH_2_FILES=`git diff --name-only origin/master...origin/$BRANCH_2 | tr '\n' ' '`
  echo `date +%r` "checkout origin/$BRANCH_2 -- $BRANCH_2_FILES"
  ssh $SSH_HOST "(cd $DEST_DIR; git checkout origin/$BRANCH_2 -- $BRANCH_2_FILES)"
fi

echo ""
echo `date +%r` "Syncing files in git status"
git status -s -u | awk '{print $2}' | sync_files

echo ""
echo `date +%r` "Watching for new changes"
fswatch -m fsevents_monitor -Ee  '\.git|node_modules' . | sync_files