CloudFormation command line generator from template

cfn-cmdline-gen.py

# You need to install cfn-tools with "pip install cfn_flip"

import sys
from cfn_tools import load_yaml

try:
    INPUT_FILE = sys.argv[1]
except Exception as e:
    print('No input file!\nUsage: python cfn-cmdline-gen.py template.yml [separator-char]')
    exit(1)

SEPARATOR = '^' # default for Windows

try:
    SEPARATOR = sys.argv[2]
except Exception as e:
    pass

CMD_LINE = 'aws cloudformation create-stack '+SEPARATOR+'\n--stack-name <stackname> '+SEPARATOR+'\n' + \
    '--parameters '+SEPARATOR+'\n' 

with open(INPUT_FILE, 'r') as fdata:
    ydata = load_yaml(fdata)

# no support for NAMED_IAM and AUTO_EXPAND capabilities yet
capability_iam = False
    
for key, value in ydata.items():
    if key == 'Parameters':
        for pkey, pvalue in value.items():
            CMD_LINE = CMD_LINE + 'ParameterKey='+pkey+',ParameterValue=<value> '+SEPARATOR+'\n'
    if key == 'Resources':
        for rkey, rvalue in value.items():
            if rvalue['Type'].startswith('AWS::IAM'):
                capability_iam = True

CMD_LINE = CMD_LINE + '--template-body file://'+INPUT_FILE+' '+SEPARATOR+'\n'

if capability_iam:
    CMD_LINE = CMD_LINE + '--capabilities CAPABILITY_IAM '+SEPARATOR+'\n'

CMD_LINE = CMD_LINE[:-3]

print(CMD_LINE)