binary

bin.js

@@ -0,0 +1,41 @@
+#!/usr/bin/env node
+
+'use strict';
+
+const promisify = require('util.promisify');
+const chalk = require('chalk');
+const finder = require('find-package-json');
+
+const path = require('path');
+const writeFile = promisify(require('fs').writeFile);
+
+const { filename } = finder(process.cwd()).next();
+
+const getLockfile = require('./getLockfile');
+
+const { argv: { output, date, package: pkg } } = require('yargs')
+	.help()
+	.option('date', {
+		type: 'string',
+		describe: '“now”, or a date (same format as `new Date()`)',
+		demandOption: true,
+		coerce(arg) { return arg === 'now' ? arg : new Date(arg); },
+	})
+	.option('package', {
+		type: 'string',
+		describe: 'path to a `package.json` file',
+		normalize: true,
+		coerce(arg) { return path.resolve(arg); },
+	})
+	.default('package', filename, path.relative(process.cwd(), filename))
+	.option('output', {
+		alias: 'o',
+		describe: 'output file path',
+		normalize: true,
+		demandOption: true,
+	})
+
+getLockfile(pkg, date === 'now' ? undefined : date, console.log.bind(console))
+	.then(lockfile => writeFile(output, lockfile))
+	.then(() => { console.log(chalk.green('Lockfile contents written!')); })
+	.catch(err => console.error(err));

package.json

@@ -2,6 +2,7 @@
 	"name": "npm-lockfile",
 	"version": "0.0.0",
 	"description": "Safely generate an npm lockfile and output it to the filename of your choice.",
+	"bin": "./bin.js",
 	"scripts": {
 		"test": "echo \"Error: no test specified\" && exit 1"
 	},
@@ -24,13 +25,18 @@
 	"homepage": "https://github.com/ljharb/npm-lockfile#readme",
 	"dependencies": {
 		"chalk": "^2.4.2",
+		"find-package-json": "^1.2.0",
 		"fs-copy-file": "^2.1.2",
 		"is-date-object": "^1.0.1",
 		"node-cleanup": "^2.1.2",
 		"object-inspect": "^1.6.0",
 		"rimraf": "^2.6.3",
 		"semver": "^5.6.0",
 		"tmp": "0.0.33",
-		"util.promisify": "^1.0.0"
+		"util.promisify": "^1.0.0",
+		"yargs": "^13.2.1"
+	},
+	"engines": {
+		"node": ">= 6"
 	}
 }