update_specfile.py

#!/bin/python3

import os
from os.path import expanduser
import requests
import rpm
import shutil

SPEC_FILE_URL = "https://raw.githubusercontent.com/M4rtinK/modrana/master/packaging/modrana.spec"

HOME = expanduser("~")
PROFILE_PATH = os.path.join(HOME, ".config/modrana_dgroc")
TMP_SPEC = os.path.join(PROFILE_PATH, "modrana.spec_temp")
CURRENT_SPEC = os.path.join(PROFILE_PATH, "modrana.spec")

if not os.path.exists(PROFILE_PATH):
    os.makedirs(PROFILE_PATH)

def download_file(url, local_filename):
    print("Downloading URL: %s" % url)
    print("Into file: %s" % local_filename)
    r = requests.get(url)
    f = open(local_filename, 'wb')
    for chunk in r.iter_content(chunk_size=512 * 1024):
        if chunk:  # filter out keep-alive new chunks
            f.write(chunk)
    f.close()
    return

# delete previous file (if any)
if os.path.exists(TMP_SPEC):
    os.remove(TMP_SPEC)

# download the spec file
download_file(SPEC_FILE_URL, TMP_SPEC)

if os.path.exists(CURRENT_SPEC):
    # get headers from the spec files
    git_spec = rpm.spec(TMP_SPEC)
    current_spec = rpm.spec(CURRENT_SPEC)
    git_spec_hdr = git_spec.packages[0].header
    current_spec_hdr = current_spec.packages[0].header
    rc = rpm.versionCompare(git_spec_hdr, current_spec_hdr)
    if rc > 0:
        # the spec file from git has a higher version number - update the currently used specfile
        print("Specfile from Git has higher version - replacing current specfile.")
        shutil.move(TMP_SPEC, CURRENT_SPEC)
    else:
        print("Current specfile has higher version that spec file from Git.")

else:
    # not yet any current spec file - create it
    shutil.move(TMP_SPEC, CURRENT_SPEC)