sync-code-folders.sh

#!/usr/bin/env bash

rsync_bin="/usr/bin/rsync"
rsync_args="--partial --delete -au"
sync_local_path="/Users/sutto/Code-Sync"
sync_remote_path="./Code-Sync"
sync_remote_hosts="[email protected]"

function path-with-trailing-slash {
  echo "$1" | sed 's#/*$#/#'
}

function invalid-host-or-user {
  [[ -z "$1" || -z "$2" || "$1" = "$2" ]]
}

function sync-folder-to-host {
  local sync_user=$(echo "$1" | sed 's#@.*##')
  local sync_host=$(echo "$1" | sed 's#.*@##')
  if invalid-host-or-user $sync_user $sync_host; then
    echo "[ERROR] No host or user given to sync-folder-to-host" >&2
    return 1
  fi
  real_local_path=$(path-with-trailing-slash $sync_local_path)
  real_remote_path=$(path-with-trailing-slash $sync_remote_path)
  echo "Syncing $real_local_path to $sync_user on $sync_host to $real_remote_path"
  $rsync_bin $rsync_args $real_local_path $sync_user@$sync_host:$real_remote_path
}

function sync-folder-from-host {
  local sync_user=$(echo "$1" | sed 's#@.*##')
  local sync_host=$(echo "$1" | sed 's#.*@##')
  if invalid-host-or-user $sync_user $sync_host; then
    echo "[ERROR] No host or user given to sync-folder-from-host" >&2
    return 1
  fi
  real_local_path=$(path-with-trailing-slash $sync_local_path)
  real_remote_path=$(path-with-trailing-slash $sync_remote_path)
  echo "Syncing $real_remote_path from $sync_user on $sync_host to $real_local_path"
  $rsync_bin $rsync_args $sync_user@$sync_host:$real_remote_path $real_local_path
}

function check-host-availability {
  ping -t 1 -c 1 "$(echo "$1" | sed 's#.*@##')" &> /dev/null
}

function fail-sync {
  echo "Sync failed: $1" 2>&1
  exit 1
}

# We check host availability at each point.

echo "Step 1: Syncing from all hosts"
for sync_host in $sync_remote_hosts; do
  if check-host-availability "$sync_host"; then
    sync-folder-from-host "$sync_host" || fail-sync "Failure syncing from $sync_host"
  fi
done

echo "Step 2: Syncing to all hosts"
for sync_host in $sync_remote_hosts; do
  if check-host-availability "$sync_host"; then
    sync-folder-to-host "$sync_host" || fail-sync "Failure syncing to $sync_host"
  fi
done