loki: line oriented (k)ommand interpreter
Loki is a small library for writing line-oriented command interpreters (or cli programs) in Nim, that is inspired by Python's cmd lib.
import loki, strutils, options
loki(myHandler, input):
do_greet name:
if isSome(name):
echo("Hello ", name.get, "!")
else:
echo("Hello there!")
do_add num1, num2:
if isSome(num1) and isSome(num2):
echo("Result is ", parseInt(num1.get) + parseInt(num2.get))
else:
echo("Provide two numbers to add them")
do_EOF:
write(stdout, "Bye!\n")
return true
default:
write(stdout, "*** Unknown syntax: ", input.text , " ***\n")
let myCmd = newLoki(
handler=myHandler,
intro="Welcome to my CLI!\n",
)
myCmd.cmdLoopCompile with something like:
nim c --threads:on cmd.nimAnd an example run:
$ ./cmd
Welcome to my CLI!
(loki) greet
Hello there!
(loki) greet Beshr
Hello Beshr!
(loki) add
Provide two numbers to add them
(loki) add 1 2
Result is 3