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executable file
路94 lines (78 loc) 路 2.17 KB
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/**
* This tiny wrapper file checks for known node flags and appends them
* when found, before invoking the "real" _babel-node(1) executable.
*/
import getV8Flags from "v8flags";
import path from "path";
let args = [path.join(__dirname, "_babel-node")];
let babelArgs = process.argv.slice(2);
let userArgs;
// separate node arguments from script arguments
const argSeparator = babelArgs.indexOf("--");
if (argSeparator > -1) {
userArgs = babelArgs.slice(argSeparator); // including the --
babelArgs = babelArgs.slice(0, argSeparator);
}
/**
* Replace dashes with underscores in the v8Flag name
* Also ensure that if the arg contains a value (e.g. --arg=true)
* that only the flag is returned.
*/
function getNormalizedV8Flag(arg) {
const matches = arg.match(/--(.+)/);
if (matches) {
return `--${matches[1].replace(/-/g, "_")}`;
}
return arg;
}
getV8Flags(function (err, v8Flags) {
babelArgs.forEach(function(arg) {
const flag = arg.split("=")[0];
switch (flag) {
case "-d":
args.unshift("--debug");
break;
case "debug":
case "--debug":
case "--debug-brk":
case "--inspect":
case "--inspect-brk":
args.unshift(arg);
break;
case "-gc":
args.unshift("--expose-gc");
break;
case "--nolazy":
args.unshift(flag);
break;
default:
if (v8Flags.indexOf(getNormalizedV8Flag(flag)) >= 0 || arg.indexOf("--trace") === 0) {
args.unshift(arg);
} else {
args.push(arg);
}
break;
}
});
// append arguments passed after --
if (argSeparator > -1) {
args = args.concat(userArgs);
}
try {
const kexec = require("kexec");
kexec(process.argv[0], args);
} catch (err) {
if (err.code !== "MODULE_NOT_FOUND") throw err;
const child_process = require("child_process");
const proc = child_process.spawn(process.argv[0], args, { stdio: "inherit" });
proc.on("exit", function (code, signal) {
process.on("exit", function () {
if (signal) {
process.kill(process.pid, signal);
} else {
process.exit(code);
}
});
});
}
});