Simple script to sync local copy of the code to remote server - helpful while debugging app remotely for example.

fswatch.sh

#!/bin/bash
set -e

export DELETEONSYNC=true
export LOCALPATH=`perl -e 'use Cwd "abs_path";print abs_path(shift)' $1`
export REMOTEPATH=$3
export LOCALPATHLENGTH=${#LOCALPATH}
export REMOTESERVER=$2
export LISTEXT="$4"

function contains() {
    local n=$#
    local value=${!n}
    for ((i=1;i < $#;i++)) {
        if [ "${!i}" == "${value}" ]; then
            echo "y"
            return 0
        fi
    }
    echo "n"
    return 1
}

function syncfile() {
	echo "Sync file function is triggered"
  FILE=$1
  REMOTEFILE=$REMOTEPATH${FILE:$LOCALPATHLENGTH}
  EXTENSION="${FILE#*.}"
  IFS=', ' read -r -a FAVEXTENSIONS <<< "$LISTEXT"
	if [ $(contains "${FAVEXTENSIONS[@],,}" "${EXTENSION,,}" ) == "y" ]    # ${VAR_NAME,,} <-- make string VAR_NAME into lowercase.
  then
		echo "File $FILE is in the list of extenions we are syncing."
		# If file does not exist (eg we deleted it, remove it on remote server)
		if [ ! -f $FILE  ]; then
			if [[ "$DELETEONSYNC" = true ]]; then
				echo "DELETING $REMOTEFILE on server"
	  	  ssh $REMOTESERVER "sudo rm $REMOTEFILE"
		  fi
	  	return 
    fi 
		echo "Copying $FILE to remote server"
  	rsync  -o -g --rsync-path="sudo rsync" $FILE  $REMOTESERVER:$REMOTEFILE
		## Comment this out if you dont want to change file owner to www:data.
  	ssh $REMOTESERVER "sudo chown www-data:www-data $REMOTEFILE"
    echo synching $REMOTEFILE 
  fi
}
export -f syncfile
export -f contains

if [ ! $# -eq 4 ]; then 
  echo  "Usage "
  echo  './fswatch.sh /LOCAL/PATH USERNAME@REMOTESERVER  /REMOTE/PATH "LIST,OF,EXTENSION,WE,WANT,TO,SYNC" '
  echo  'eg: ./fswatch.sh ./app vagrant@192.168.33.213 /var/www/app "py,html,js" '
	echo -e "You should have ~/.ssh/ssh_config configured to either reuse existing ssh connection \nOR using private key to avoid password prompts as this script use alot of rsync and ssh to do its dirty work."
  echo "Remote user should have sudo access that require no password. If you dont have this, modify the script to suit your need 🤷‍♂️"
  exit
fi 

echo "Starting fswatch on $LOCALPATH"

fswatch $LOCALPATH | xargs -I {} bash -c 'syncfile  $@' _ {}