deno2node/lib/emit.js

`tsc` replacement for transpiling Deno libraries to run on Node.js.

const anyShebang = /^#![^\n]*\n/;
const denoShebang = /^#!\/usr\/bin\/env -S deno run\b[^\n]*\n/;
const nodeShebang = "#!/usr/bin/env node\n";
function transpileShebang(file) {
    file.text = file.filePath.endsWith(".js")
        ? file.text.replace(denoShebang, nodeShebang)
        : file.text.replace(anyShebang, "\n");
}
async function markExecutableIfNeeded(file) {
    if (Deno.build.os === "windows")
        return;
    if (!file.text.startsWith(nodeShebang))
        return;
    await Deno.chmod(file.filePath, 0o755);
}
/**
 * Emits project to the filesystem.
 * Returns diagnostics.
 *
 * Replaces Deno shebang with Node.js shebang in JS outputs.
 * Removes shebangs from non-JS outputs.
 * Then `chmod +x`'s outputs with Node.js shebang.
 */
export async function emit(project) {
    const result = project.emitToMemory();
    const files = result.getFiles();
    files.forEach(transpileShebang);
    await result.saveFiles();
    await Promise.all(files.map(markExecutableIfNeeded));
    const preEmitDiagnostics = project.getPreEmitDiagnostics();
    if (preEmitDiagnostics.length !== 0)
        return preEmitDiagnostics;
    return result.getDiagnostics();
}
import { Deno } from "./shim.node.js";