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dir.ts
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dir.ts
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import * as swc from "@swc/core";
import fs from "fs";
import defaults from "lodash/defaults";
import path from "path";
import slash from "slash";
import { CliOptions } from "./options";
import * as util from "./util";
export default async function ({
cliOptions,
swcOptions
}: {
cliOptions: CliOptions;
swcOptions: swc.Options;
}) {
/**
* Removes the leading directory, including all parent relative paths
*/
function stripComponents(filename: string) {
const components = filename.split('/').slice(1);
if (!components.length) {
return filename;
}
while (components[0] === '..') {
components.shift();
}
return components.join('/');
}
function getDest(filename: string, ext?: string) {
const relative = slash(path.relative(process.cwd(), filename));
let base = stripComponents(relative);
if (ext) {
base = base.replace(/\.\w*$/, ext);
}
return path.join(cliOptions.outDir, base);
}
async function handle(filename: string) {
if (util.isCompilableExtension(filename, cliOptions.extensions)) {
const dest = getDest(filename, ".js");
const sourceFileName = slash(path.relative(path.dirname(dest), filename));
const result = await util.compile(
filename,
defaults({ sourceFileName }, swcOptions),
cliOptions.sync
);
if (result) {
util.outputFile(result, dest, swcOptions.sourceMaps);
util.chmod(filename, dest);
return true;
}
} else if (cliOptions.copyFiles) {
const dest = getDest(filename);
fs.mkdirSync(path.dirname(dest), { recursive: true });
fs.copyFileSync(filename, dest);
return 'copied';
}
return false;
}
if (cliOptions.deleteDirOnStart) {
fs.rmdirSync(cliOptions.outDir, { recursive: true })
}
fs.mkdirSync(cliOptions.outDir, { recursive: true });
const results = new Map<string, Error | boolean | 'copied'>();
for (const filename of util.globSources(cliOptions.filenames, cliOptions.includeDotfiles)) {
try {
const result = await handle(filename);
if (result !== undefined) {
results.set(filename, result);
}
} catch (err) {
console.error(err.message);
results.set(filename, err);
}
}
if (cliOptions.watch) {
const watcher = util.watchSources(cliOptions.filenames, cliOptions.includeDotfiles);
watcher.on('ready', () => {
try {
util.assertCompilationResult(results, cliOptions.quiet);
if (!cliOptions.quiet) {
console.info('Watching for file changes.')
}
} catch (err) {
console.error(err.message);
}
});
watcher.on('unlink', (filename) => {
try {
if (util.isCompilableExtension(filename, cliOptions.extensions)) {
fs.unlinkSync(getDest(filename, ".js"));
} else if (cliOptions.copyFiles) {
fs.unlinkSync(getDest(filename));
}
} catch (err) {
if (err.code !== 'ENOENT') {
console.error(err.stack);
}
}
});
for (const type of ['add', 'change']) {
watcher.on(type, (filename) => {
const start = process.hrtime()
handle(filename)
.then((result) => {
results.set(filename, result);
if (result && cliOptions.logWatchCompilation) {
const [seconds, nanoseconds] = process.hrtime(start);
const ms = seconds * 1000 + (nanoseconds * 1e-6);
const name = path.basename(filename);
console.log(`${result === "copied" ? "Copied" : "Compiled"} ${name} in ${ms.toFixed(2)}ms`);
}
})
.catch((err) => {
console.error(err.message);
results.set(filename, err);
});
});
}
} else {
util.assertCompilationResult(results, cliOptions.quiet);
}
}