github-release-upload.py

import os
import sys
import requests
import urllib3

def getRequiredEnvVar(name):
    envVar = os.environ.get(name)
    if envVar is None:
        print('Required environment variable: ' + name + ' is missing. Exiting...')
        sys.exit(1)
    return envVar

# Creates a new Github release and returns the ID of the newly created release. Although it returns the existing
# release ID, if the release already exits.
def main():
    # Disable SSL warnings
    urllib3.disable_warnings()

    owner = getRequiredEnvVar('OWNER')
    package = getRequiredEnvVar('PACKAGE')
    productVersion = getRequiredEnvVar('PRODUCT_VERSION')
    githubToken = getRequiredEnvVar('GITHUB_TOKEN')

    githubApiBaseUrl = 'https://api.github.com'
    headers = {'Authorization': 'token ' + githubToken}
    payload = {'tag_name': productVersion, 'name': productVersion}

    r = requests.post(githubApiBaseUrl + '/repos/' + owner + '/' + package + '/releases', json=payload, headers=headers)
    # print(r.status_code, r.reason)
    # print(r.text)
    responseJson = r.json()
    if r.status_code == 200 or r.status_code == 201:
        releaseId = responseJson['id']
        if releaseId is None:
            # This is unexpected. There is supposed to be a Github release ID in the response JSON.
            print('Error! Release ID was not found for the newly created Github release! Response:')
            print(r.text)
            sys.exit(1)

        # We are all good, let's print the ID of the newly created Github release
        print(releaseId)
        sys.exit(0)

    releaseAlreadyExists = False

    if r.status_code == 422:
        # This is the status code we get, when the release already exists
        for error in responseJson['errors']:
            if error['code'] == "already_exists":
                releaseAlreadyExists = True
                break
        if not releaseAlreadyExists:
            print('Error! Release was expected to already exist, but it does not. Response:')
            print(r.text)
            sys.exit(2)

        r = requests.get(githubApiBaseUrl + '/repos/' + owner + '/' + package + '/releases', headers=headers)

        for ver in r.json():
            if ver['tag_name'] == productVersion:
                releaseId = ver['id']
                if releaseId is None:
                    # This is unexpected. There is supposed to be a Github release ID in the response JSON.
                    print('Error! Release ID was not found in the existing Github release! Response:')
                    print(r.text)
                    sys.exit(1)

                # We are all good, let's print the ID of the existing Github release
                print(releaseId)
                sys.exit(0)

    # Github release ID was not found, and the response code was unexpected anyway
    print('Unexpected response status code: ', r.status_code)
    print('Response message: ')
    print(r.text)
    sys.exit(3)

if __name__ == "__main__":
    main()