Create an express-generator application of our own.
We will use python and docopt to create a CLI application.
Step 1:
- Install docopt.
pip install docopt
To know more about docopt here.
Step 2:
- To use docopt we need to create a docstring in python
'''create-express-app.
Usage:
create-express-app.py (-h | --help)
create-express-app.py --version
create-express-app.py check
create-express-app.py create <params>
Options:
-h --help Show this screen
--version Show Version
'''
Step 3:
- Now all we have to do is to import docopt and parse the input
from docopt import docopt
if __name__ == '__main__':
arguments = docopt(__doc__,version='1.0.0')
print(arguments)
Step 4:
- Now we have to write functions to handle the parsed inputs
The arguments
variable returns a dictionary
we can then check for the command we are looking and perform the function
if arguments['check'] == True:
check()
elif arguments['create'] == True:
create(arguments['<params>'])
The create
function :
def create(params):
import os
import subprocess
os.mkdir(params)
path = './'+params
os.chdir(path)
os.system("npm init -y")
os.system("type nul > app.js")
os.system("npm i express body-parser")
os.system("code ..")
In the create function we are building the project to do the following task:
- run npm init
- Create a file named app.js
- install the express and body-parser npm packages
- and open the directory in visual studio code.
To check out the complete code here
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