cmd.js

A simple library for building CLI with sub-commands in Node.js.

Example

``sh
node calculator.example.ts add 2 3
node calculator.example.ts mul --x 3 --y 4
`

`typescript
import * as Cmd from "./src/index.ts"

function logger(): Cmd.Middleware {
return (ctx, next) => {
console.log(ctx)
return next(ctx)
}
}

const router = Cmd.createRouter("calculator", "0.1.0", {
middleware: [logger()],
})

router.defineRoutes([
"add x y -- secretly double the args",
"mul --x --y",
])

function doubleArgs(): Cmd.Middleware {
return (ctx, next) => {
ctx.args = ctx.args.map((arg) => String(Number(arg) * 2))
return next(ctx)
}
}

router.defineHandlers({
add: {
middleware: [doubleArgs()],
handler({ args: [x, y] }) {
console.log(Number(x) + Number(y))
},
},
mul: (options) => {
console.log(Number(options["--x"]) * Number(options["--y"]))
},
})

try {
await router.run(process.argv.slice(2))
} catch (error) {
console.log(error)
process.exit(1)
}
``

License

GPLv3