notify_release

#!/usr/bin/env python

from email.mime.text import MIMEText
import os
import pwd
import re
import smtplib


template = '''UCoMP pipeline %s was just released. Changes for this version include:

%s
- UCoMP developer team'''


def get_username():
    return pwd.getpwuid(os.getuid())[0]


def main():
    # get email addresses of people to notify about the release
    release_notifier_filename = os.path.expanduser('~/.ucomp_release_notifiers')
    with open(release_notifier_filename, 'r') as f:
        notifiers = f.read().split()

    # read release notes
    releases_filename = 'RELEASES.md'
    with open(releases_filename, 'r') as f:
        release_notes = f.read()

    # find release notes of current release
    v = re.compile('^#### (\d+.*)$', re.MULTILINE)
    for m in v.finditer(release_notes): pass
    version = m.group(1)  #release_notes[slice(*m.span())]
    release_notes = release_notes[m.span()[0]:]
    release_notes = template % (version, release_notes)

    # send email of release notes to notifier emails
    me = '%s@ucar.edu' % get_username()
    msg = MIMEText(release_notes)
    msg['Subject'] = f'Release notes for UCoMP pipeline {version}'
    msg['From'] = me
    msg['To'] = ', '.join(notifiers)

    s = smtplib.SMTP('localhost')
    s.sendmail(me, notifiers, msg.as_string())
    s.quit()


if __name__ == '__main__':
    main()