cli.js

#! /usr/bin/env node

const { splitDiffStrings, splitPatch } = require(`./index`)
const cli = require(`commander`)

const { readFileSync } = require('fs')

cli
	.version(`0.1.0`)
	.usage(`[options] <file1> <file2>`)
	.option('--color', "Force color output ON")
	.option('--no-color', "Force color output OFF")
	.option('--columns [columns]', "Specify width output override.")
	.option('--show-large-hunks', "Include large patch sections (hunks) in the output. DANGER: if it's huge, it'll take a long time!")
	.on(`--help`, () => {
		console.log(``)
		console.log(`  Example:`)
		console.log(``)
		console.log(`    $ splitdiff file1 file2`)
		console.log(`    $ git --no-pager diff file1 file2 | splitdiff [options]`)
		console.log(``)
	})
	.parse(process.argv)

try {

	if (cli.args.length < 2) {

		process.stdin.setEncoding('utf8')

		let data = ''

		process.stdin.on('readable', () => {
			const chunk = process.stdin.read()
			if (chunk !== null) {
				data += chunk
			}
		})
		process.stdin.on('end', () => {
			if(data !== '') {
				let opts = {
					showLargeHunks: cli.showLargeHunks || false
				}

				if(cli.columns){
					opts.columns = cli.columns
				}

				console.log(splitPatch(data, opts))
			}
		})

	}
	else {
		console.log(
			splitDiffStrings(
				cli.args[0] + `\n\n` + readFileSync(cli.args[0], { encoding: `utf8` }),
				cli.args[1] + `\n\n` + readFileSync(cli.args[1], { encoding: `utf8` }),
				{
					diffType: `diffLines`,
					lineNumbers: true,
					lineOffset: 2
				}
			)
		)
	}

} catch (error) {
	console.log(`splitdiff:`, error)
	process.exit(1)
}