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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
/* eslint-env node */
"use strict";
/*
* TypeScript transformer to automatically enable @ts-check for root JS files,
* only those directly referenced from the tsconfig.json include option.
*/
exports.default = (program, host, _, { ts }) => {
return ts.createProgram(
program.getRootFileNames(),
program.getCompilerOptions(),
{
...host,
getSourceFile(...args) {
let file = host.getSourceFile(...args);
// If source file doesn't have a @ts-check or @ts-nocheck directive.
if (!file.checkJsDirective && file.scriptKind === ts.ScriptKind.JS) {
// Add one based on it being included as root file in tsconfig.
file.checkJsDirective = {
enabled: program.getRootFileNames().includes(file.fileName),
};
}
return file;
},
}
);
};