Python function to wait for a recently published version of an npm package to become available. Too many times I've been bitten by npm publish returning but the package not becoming available for several seconds, minutes and sometimes even hours later. If you automate your deployment with python this can help you too.

wait-until-published.py

import sys
import json
import time

# pip install npm
from npm.bindings import npm_run

def wait(package, version):
    while True:
        err, raw = npm_run('view','--json', package)
        sys.stdout.write('.')
        sys.stdout.flush()
        if err:
            raise Exception('npm view returned an error: ' + str(err))
        info = json.loads(raw)
        if version in info['versions']:
            print('')
            break
        time.sleep(1)

wait(*sys.argv[1:])

# python wait-until-published.py PACKAGE VERSION
# python wait-until-published.py npm 6.9.0
# python wait-until-published.py @org/pkg 1.2.3