MattermostToRocketChat: Migrate channels/rooms and messages from Mattermost to Rocket.Chat

a simple, not really comprehensive, script to convert a Mattermost json export file to a Rocket.Chat csv import zip file

i thought someone might be interested, so i shared it here. PRs welcome (would be great if the resulting zip import can be tested ;)) code is rough and written in a couple of minutes to transfer messages of a hand full of channels, so probably not the solution you were looking for if you have lots of channels with lots of members :D

currently its only tested on windows with PS Core, but it probably could work on linux/macOS if you install PS Core and change the path separators from \ to /.

How to use

1. Download mmtorc.ps1
2. update the variables at the top of the script to match you preferences
3. execute mmtorc.ps1

What it can do currently

• Import channels (with blacklist)
• Import messages of channels

What it can't do currently

• Import users
• Import channel members (will be set to a default user(s), adding members must be done manually after import)
• Import direct messages

Disclaimer

this script was more of a "proof of concept" NOT a comprehensive solution to migrate production data from one system to another.

use this script at your own risk! i'm not resposible for any missing messages or failures/overwrites during import / export etc.

i just thought this might be a good starting point for someone

Resources

• https://docs.rocket.chat/guides/administrator-guides/import/csv
• https://docs.mattermost.com/administration/bulk-export.html