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prettify, sorry for the big ass commit

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Olivier Gagnon
2021-09-04 19:09:30 -04:00
parent 3d7cdb4ef9
commit a18bdd6afc
554 changed files with 91615 additions and 66138 deletions
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src/NetscriptJSEvaluator.js
+95 -84
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@@ -3,10 +3,9 @@ import { ScriptUrl } from "./Script/ScriptUrl";
// Makes a blob that contains the code of a given script.
export function makeScriptBlob(code) {
return new Blob([code], {type: "text/javascript"});
return new Blob([code], { type: "text/javascript" });
}
// Begin executing a user JS script, and return a promise that resolves
// or rejects when the script finishes.
// - script is a script to execute (see Script.js). We depend only on .filename and .code.
@@ -16,40 +15,45 @@ export function makeScriptBlob(code) {
// When the promise returned by this resolves, we'll have finished
// running the main function of the script.
export async function executeJSScript(scripts = [], workerScript) {
let loadedModule;
let urls = null;
let script = workerScript.getScript();
if (shouldCompile(script, scripts)) {
// The URL at the top is the one we want to import. It will
// recursively import all the other modules in the urlStack.
//
// Webpack likes to turn the import into a require, which sort of
// but not really behaves like import. Particularly, it cannot
// load fully dynamic content. So we hide the import from webpack
// by placing it inside an eval call.
script.markUpdated();
urls = _getScriptUrls(script, scripts, []);
script.url = urls[urls.length - 1].url;
script.module = new Promise(resolve => resolve(eval('import(urls[urls.length - 1].url)')));
script.dependencies = urls;
}
loadedModule = await script.module;
let loadedModule;
let urls = null;
let script = workerScript.getScript();
if (shouldCompile(script, scripts)) {
// The URL at the top is the one we want to import. It will
// recursively import all the other modules in the urlStack.
//
// Webpack likes to turn the import into a require, which sort of
// but not really behaves like import. Particularly, it cannot
// load fully dynamic content. So we hide the import from webpack
// by placing it inside an eval call.
script.markUpdated();
urls = _getScriptUrls(script, scripts, []);
script.url = urls[urls.length - 1].url;
script.module = new Promise((resolve) =>
resolve(eval("import(urls[urls.length - 1].url)")),
);
script.dependencies = urls;
}
loadedModule = await script.module;
let ns = workerScript.env.vars;
let ns = workerScript.env.vars;
try {
// TODO: putting await in a non-async function yields unhelpful
// "SyntaxError: unexpected reserved word" with no line number information.
if (!loadedModule.main) {
throw makeRuntimeRejectMsg(workerScript, `${script.filename} cannot be run because it does not have a main function.`);
}
return loadedModule.main(ns);
} finally {
// Revoke the generated URLs
if (urls != null) {
for (const b in urls) URL.revokeObjectURL(b.url);
}
try {
// TODO: putting await in a non-async function yields unhelpful
// "SyntaxError: unexpected reserved word" with no line number information.
if (!loadedModule.main) {
throw makeRuntimeRejectMsg(
workerScript,
`${script.filename} cannot be run because it does not have a main function.`,
);
}
return loadedModule.main(ns);
} finally {
// Revoke the generated URLs
if (urls != null) {
for (const b in urls) URL.revokeObjectURL(b.url);
}
}
}
/** Returns whether we should compile the script parameter.
@@ -58,17 +62,18 @@ export async function executeJSScript(scripts = [], workerScript) {
* @param {Script[]} scripts
*/
function shouldCompile(script, scripts) {
if (script.module === "") return true;
return script.dependencies.some(dep => {
const depScript = scripts.find(s => s.filename == dep.filename);
if (script.module === "") return true;
return script.dependencies.some((dep) => {
const depScript = scripts.find((s) => s.filename == dep.filename);
// If the script is not present on the server, we should recompile, if only to get any necessary
// compilation errors.
if (!depScript) return true;
// If the script is not present on the server, we should recompile, if only to get any necessary
// compilation errors.
if (!depScript) return true;
const depIsMoreRecent = depScript.moduleSequenceNumber > script.moduleSequenceNumber;
return depIsMoreRecent;
});
const depIsMoreRecent =
depScript.moduleSequenceNumber > script.moduleSequenceNumber;
return depIsMoreRecent;
});
}
// Gets a stack of blob urls, the top/right-most element being
@@ -92,51 +97,57 @@ function shouldCompile(script, scripts) {
*/
// BUG: apparently seen is never consulted. Oops.
export function _getScriptUrls(script, scripts, seen) {
// Inspired by: https://stackoverflow.com/a/43834063/91401
/** @type {ScriptUrl[]} */
const urlStack = [];
seen.push(script);
try {
// Replace every import statement with an import to a blob url containing
// the corresponding script. E.g.
//
// import {foo} from "bar.js";
//
// becomes
//
// import {foo} from "blob://<uuid>"
//
// Where the blob URL contains the script content.
let transformedCode = script.code.replace(/((?:from|import)\s+(?:'|"))(?:\.\/)?([^'"]+)('|")/g,
(unmodified, prefix, filename, suffix) => {
const isAllowedImport = scripts.some(s => s.filename == filename);
if (!isAllowedImport) return unmodified;
// Inspired by: https://stackoverflow.com/a/43834063/91401
/** @type {ScriptUrl[]} */
const urlStack = [];
seen.push(script);
try {
// Replace every import statement with an import to a blob url containing
// the corresponding script. E.g.
//
// import {foo} from "bar.js";
//
// becomes
//
// import {foo} from "blob://<uuid>"
//
// Where the blob URL contains the script content.
let transformedCode = script.code.replace(
/((?:from|import)\s+(?:'|"))(?:\.\/)?([^'"]+)('|")/g,
(unmodified, prefix, filename, suffix) => {
const isAllowedImport = scripts.some((s) => s.filename == filename);
if (!isAllowedImport) return unmodified;
// Find the corresponding script.
const [importedScript] = scripts.filter(s => s.filename == filename);
// Find the corresponding script.
const [importedScript] = scripts.filter((s) => s.filename == filename);
// Try to get a URL for the requested script and its dependencies.
const urls = _getScriptUrls(importedScript, scripts, seen);
// Try to get a URL for the requested script and its dependencies.
const urls = _getScriptUrls(importedScript, scripts, seen);
// The top url in the stack is the replacement import file for this script.
urlStack.push(...urls);
return [prefix, urls[urls.length - 1].url, suffix].join('');
},
);
// The top url in the stack is the replacement import file for this script.
urlStack.push(...urls);
return [prefix, urls[urls.length - 1].url, suffix].join("");
},
);
// We automatically define a print function() in the NetscriptJS module so that
// accidental calls to window.print() do not bring up the "print screen" dialog
transformedCode += `\n\nfunction print() {throw new Error("Invalid call to window.print(). Did you mean to use Netscript's print()?");}`
// We automatically define a print function() in the NetscriptJS module so that
// accidental calls to window.print() do not bring up the "print screen" dialog
transformedCode += `\n\nfunction print() {throw new Error("Invalid call to window.print(). Did you mean to use Netscript's print()?");}`;
// If we successfully transformed the code, create a blob url for it and
// push that URL onto the top of the stack.
urlStack.push(new ScriptUrl(script.filename, URL.createObjectURL(makeScriptBlob(transformedCode))));
return urlStack;
} catch (err) {
// If there is an error, we need to clean up the URLs.
for (const url in urlStack) URL.revokeObjectURL(url);
throw err;
} finally {
seen.pop();
}
// If we successfully transformed the code, create a blob url for it and
// push that URL onto the top of the stack.
urlStack.push(
new ScriptUrl(
script.filename,
URL.createObjectURL(makeScriptBlob(transformedCode)),
),
);
return urlStack;
} catch (err) {
// If there is an error, we need to clean up the URLs.
for (const url in urlStack) URL.revokeObjectURL(url);
throw err;
} finally {
seen.pop();
}
}