Parse latest Mattermost download url and launch update process.

export_latest_mattermost_download_url.py

import re
import os
import io
import requests
import subprocess

try:
    os.remove('index.html')
except:
    pass

# https://mattermost.com/download/ seems to redirect to another url - Python requests returns "forbidden" so we use wget here
subprocess.call(['wget', 'https://mattermost.com/download/'])

f = io.open("index.html", mode="r", encoding="utf-8")
test_str = f.read()
f.close()

regex = r'https:\/\/releases\.mattermost\.com\/\d+\.\d+\.\d+\/mattermost-team-\d+\.\d+\.\d+-linux-amd64\.tar\.gz'
match = ''

try:
    match = re.findall(regex, test_str)[0]
except:
    pass

if match != '':
    os.environ["URL"] = match
    print('Found Mattermost download URL:')
    print(match)
    print('')
    print('Starting update script')
    input("Press Enter to continue...")
    subprocess.call(['sh','./mm-update.sh'])
else:
    print('Something went wrong.')

mm-update.sh

#!/bin/sh
cd /tmp
wget $URL
tar -xf mattermost*.gz --transform='s,^[^/]\+,\0-upgrade,'
sudo systemctl stop mattermost
cd ~/
cp -ra mattermost/ mattermost-back-$(date +'%F-%H-%M')/
find mattermost/ mattermost/client/ -mindepth 1 -maxdepth 1 \! \( -type d \( -path mattermost/client -o -path mattermost/client/plugins -o -path mattermost/config -o -path mattermost/logs -o -path mattermost/plugins -o -path mattermost/data \) -prune \) | sort | sudo xargs rm -r
mv mattermost/plugins/ mattermost/plugins~
mv mattermost/client/plugins/ mattermost/client/plugins~
cp -an /tmp/mattermost-upgrade/. mattermost/
rm -r /tmp/mattermost-upgrade/
cd ~/mattermost
sudo systemctl start mattermost
rsync -au plugins~/ plugins
rm -rf plugins~
rsync -au client/plugins~/ client/plugins