File size: 2,056 Bytes
00df61d | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | #!/usr/bin/env node
// Copyright 2018 The Emscripten Authors. All rights reserved.
// Emscripten is available under two separate licenses, the MIT license and the
// University of Illinois/NCSA Open Source License. Both these licenses can be
// found in the LICENSE file.
//
// Preprocessor tool. This is a wrapper for the 'preprocess' function which
// allows it to be called as a standalone tool.
//
// Parameters:
// setting file. Can specify 'settings.js' here, alternatively create a temp
// file with modified settings and supply the filename here.
// input file This is the file that will be processed by the preprocessor
import assert from 'node:assert';
import {parseArgs} from 'node:util';
import {readFile, loadDefaultSettings, applySettings} from '../src/utility.mjs';
const options = {
'expand-macros': {type: 'boolean'},
help: {type: 'boolean', short: 'h'},
};
const {values, positionals} = parseArgs({options, allowPositionals: true});
if (values.help) {
console.log(`\
Run JS preprocessor / macro processor on an input file
Usage: preprocessor.mjs <settings.json> <input-file> [--expand-macros]`);
process.exit(0);
}
loadDefaultSettings();
assert(positionals.length == 2, 'Script requires 2 arguments');
// Load settings from JSON passed on the command line
let settingsFile = positionals[0];
assert(settingsFile, 'settings file not specified');
if (settingsFile == '-') {
// Read settings json from stdin (FD 0)
settingsFile = 0;
}
const userSettings = JSON.parse(readFile(settingsFile));
applySettings(userSettings);
const inputFile = positionals[1];
// We can't use static import statements here because several of these
// file depend on having the settings defined in the global scope (which
// we do dynamically above.
const parseTools = await import('../src/parseTools.mjs');
await import('../src/modules.mjs');
let output = parseTools.preprocess(inputFile);
if (values['expand-macros']) {
output = parseTools.processMacros(output, inputFile);
}
process.stdout.write(output);
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