uri-ify script: percent-encoding/decoding file content for OCPv4 MachineConfigs

urify

#!/usr/bin/python3
# Written May 2019 by Ryan Sawhill Aroha <rsaw@redhat.com>
# For dealing with OCPv4's MachineConfigs (which use Ignition)
# Ref: https://github.com/openshift/machine-config-operator
# Requires python v3.6+

import urllib.parse
import os.path
from sys import argv, stdin, stderr, exit as sysexit

me = os.path.basename(argv[0])
usage = f"Usage: {me} (-q/--quote | -u/--unquote) [FILE]"
content = None

def errquit(msg):
    print(f"ERROR: {msg}\n{usage}", file=stderr)
    sysexit(1)

# arg-validation

if not argv[1:] or argv[1] in ['-h', '--help']:
    print(usage, file=stderr)
    print("Use python3's urllib.parse to quote (percent-encode) or unquote content", file=stderr)
    sysexit()

elif argv[1] not in '-q --quote -u --unquote'.split():
    errquit(f"Expecting either -q/--quote or -u/--unquote; not '{argv[1]}'")

elif not argv[2:]:
    try:
        content = stdin.read()
    except KeyboardInterrupt:
        print()
    else:
        print("-----")
    if not content:
        errquit("Either need a filename for input or input via stdin")

elif not os.path.isfile(argv[2]):
    errquit(f"Expecting a filename for input; not '{argv[2]}' (alternatively: pass content via stdin)")

# read file

if not content:
    with open(argv[2]) as fd:
        content = fd.read()

# quote or unquote

if argv[1] in ['-q', '--quote']:
    print(urllib.parse.quote(content))

elif argv[1] in ['-u', '--unquote']:
    print(urllib.parse.unquote(content))

In-action screenshot: