Restore Messages on MacOS High Sierra. Based on the macup commad from https://github.com/balupton/dotfiles

restore-messages.bash

#!/usr/bin/env bash
set -e

backupRoot="$1"

function restore {
	echo "Restoring: $1"
	if test -e "$backupRoot/$1"; then
		sudo rm -Rf "$localRoot/$1"
		mkdir -p "$(dirname "$localRoot/$1")"
		cp -fav "$backupRoot/$1" "$localRoot/$1"
		sudo chmod -R -N "$localRoot/$1"
		sudo chown -R "$USER" "$localRoot/$1"
	else
		warning="MISSING: $backupRoot/$1"
		warnings="$warnings\n$warning"
		echo "$warning"
	fi
}

function remove {
	echo "Removing: $1"
	sudo rm -Rf "$localRoot/$1"
}

remove "Library/Caches/com.apple.iChat"
restore "Library/Preferences/com.apple.sms.plist"
restore "Library/Preferences/com.apple.messaging.expire.plist"
restore "Library/Preferences/com.apple.Messages.plist"
restore "Library/Preferences/com.apple.imessage.plist"
restore "Library/Preferences/com.apple.imessage.bag.plist"
restore "Library/Preferences/com.apple.imdpersistence.IMDPersistenceAgent.plist"
restore "Library/Preferences/com.apple.imdsmsrecordstore.plist"
restore "Library/Preferences/com.apple.imservice.ids.FaceTime.plist"
restore "Library/Preferences/com.apple.imservice.ids.iMessage.plist"
restore "Library/Preferences/com.apple.iChat.AIM.plist"
restore "Library/Preferences/com.apple.iChat.Jabber.plist"
restore "Library/Preferences/com.apple.iChat.StatusMessages.plist"
restore "Library/Preferences/com.apple.iChat.Yahoo.plist"
restore "Library/Preferences/com.apple.iChat.plist"
restore "Library/Messages"
restore "Library/Containers/com.apple.iChat"
restore "Library/Containers/com.apple.messages.MapRenderingService"
restore "Library/Containers/com.apple.messages.ShareExtension"
restore "Library/Containers/com.apple.messages.StorageManagementExtension"
restore "Library/Containers/com.apple.messages.TranscriptRenderingService"