6d965c0926
* Make babel-node a standalone package * New package `babel-node` previously `babel-cli/bin/babel-node` * updates
99 lines
2.2 KiB
JavaScript
Executable File
99 lines
2.2 KiB
JavaScript
Executable File
/**
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* This tiny wrapper file checks for known node flags and appends them
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* when found, before invoking the "real" _babel-node(1) executable.
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*/
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import getV8Flags from "v8flags";
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import path from "path";
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let args = [path.join(__dirname, "_babel-node")];
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let babelArgs = process.argv.slice(2);
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let userArgs;
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// separate node arguments from script arguments
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const argSeparator = babelArgs.indexOf("--");
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if (argSeparator > -1) {
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userArgs = babelArgs.slice(argSeparator); // including the --
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babelArgs = babelArgs.slice(0, argSeparator);
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}
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/**
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* Replace dashes with underscores in the v8Flag name
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* Also ensure that if the arg contains a value (e.g. --arg=true)
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* that only the flag is returned.
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*/
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function getNormalizedV8Flag(arg) {
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const matches = arg.match(/--(.+)/);
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if (matches) {
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return `--${matches[1].replace(/-/g, "_")}`;
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}
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return arg;
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}
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getV8Flags(function(err, v8Flags) {
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babelArgs.forEach(function(arg) {
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const flag = arg.split("=")[0];
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switch (flag) {
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case "-d":
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args.unshift("--debug");
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break;
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case "debug":
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case "--debug":
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case "--debug-brk":
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case "--inspect":
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args.unshift(arg);
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break;
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case "-gc":
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args.unshift("--expose-gc");
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break;
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case "--nolazy":
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args.unshift(flag);
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break;
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default:
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if (
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v8Flags.indexOf(getNormalizedV8Flag(flag)) >= 0 ||
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arg.indexOf("--trace") === 0
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) {
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args.unshift(arg);
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} else {
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args.push(arg);
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}
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break;
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}
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});
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// append arguments passed after --
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if (argSeparator > -1) {
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args = args.concat(userArgs);
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}
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try {
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const kexec = require("kexec");
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kexec(process.argv[0], args);
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} catch (err) {
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if (err.code !== "MODULE_NOT_FOUND") throw err;
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const child_process = require("child_process");
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const proc = child_process.spawn(process.argv[0], args, {
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stdio: "inherit",
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});
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proc.on("exit", function(code, signal) {
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process.on("exit", function() {
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if (signal) {
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process.kill(process.pid, signal);
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} else {
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process.exit(code);
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}
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});
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});
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}
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});
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