list-all-stable-snaps-by-publication-date.py

#!/usr/bin/env python3
'''Print every stable snap in the Ubuntu store, sorted by first publication.

For example:
2017-02-08T08:51:17.326613Z openmvs
2017-02-08T10:32:53.331479Z anta-i7z
2017-02-08T10:38:35.496156Z cpufreq
2017-02-08T21:06:24.386841Z verum-cli
2017-02-09T03:19:58.789293Z wuzz
'''

import urllib.request
import json

url = 'https://search.apps.ubuntu.com/api/v1/snaps/search'
params = '?fields=name,date_published&confinement='
next_page = url + params

all_packages = {}
while True:
    data = urllib.request.urlopen(next_page).read().decode('utf8')
    data = json.loads(data)
    for package in data['_embedded']['clickindex:package']:
        name = package['name'].split('.')[0]
        published = package['date_published']
        all_packages[name] = published

    if data['_links'].get('next'):
        next_page = data['_links']['next']['href']
        # Bug in click-package-index
        next_page += '&confinement='
    else:
        break

for package in sorted(all_packages, key=all_packages.get):
    print(all_packages[package], package)