update jsc version resolution on linux

Author: devsnek

README.md

@@ -35,7 +35,7 @@ installing engines to make eshost automatically find the installed engines.
 | [engine262][]      | `engine262`                      | ✅         | ✅        | ✅        | ✅      | ✅      |
 | [GraalJS][]        | `graaljs`                        | ✅         |           | ✅        |         | ✅      |
 | [Hermes][]         | `hermes`                         | ✅         |           |           |         | ✅      |
-| [JavaScriptCore][] | `jsc`, `javascriptcore`          | ✅         | ✅        | ✅        | ✅      | ✅      |
+| [JavaScriptCore][] | `jsc`, `javascriptcore`          | ✅         |           | ✅        | ✅      | ✅      |
 | [QuickJS][]        | `quickjs`, `quickjs-run-test262` |            |           | ✅        |         |         |
 | [SpiderMonkey][]   | `sm`, `spidermonkey`             | ✅         | ✅        | ✅        | ✅      | ✅      |
 | [V8][]             | `v8`                             | ✅         | ✅        | ✅        | ✅      | ✅      |

src/engines/javascriptcore.js

@@ -39,19 +39,10 @@ class JavaScriptCoreInstaller extends Installer {
   static async resolveVersion(version) {
     if (version === 'latest') {
       switch (platform) {
-        case 'linux32':
-        case 'linux64': {
-          const body = await fetch(`https://webkitgtk.org/jsc-built-products/x86_${platform === 'linux32' ? '32' : '64'}/release/?C=M;O=D`)
-            .then((r) => r.text());
-          // Check for the most recent *.sha256sum file rather than the
-          // most recent *.zip file to avoid the race condition where the
-          // ZIP file has not fully been uploaded yet. The *.sha256sum
-          // files are written last, so once one is available the
-          // corresponding ZIP file is guaranteed to be available.
-          // https://mths.be/bww
-          const match = /<a href="(\d+)\.sha256sum">/.exec(body);
-          return match[1];
-        }
+        case 'linux64':
+          return fetch('https://webkitgtk.org/jsc-built-products/x86_64/release/LAST-IS')
+            .then((r) => r.text())
+            .then((n) => n.trim().replace('.zip', ''));
         case 'win32': {
           const body = await fetch('https://build.webkit.org/builders/Apple%20Win%2010%20Release%20(Build)?numbuilds=25')
             .then((r) => r.text());
@@ -153,7 +144,7 @@ JavaScriptCoreInstaller.config = {
     },
   ] : undefined,
   supported: [
-    'linux32', 'linux64',
+    'linux64',
     'win32', 'win64',
     'darwin64',
   ],