Add runtime check for MIN_NODE_VERSION (#18845)

See emscripten-core/emsdk#1189

src/parseTools.js

@@ -995,3 +995,10 @@ function preJS() {
   }
   return result;
 }
+
+function formattedMinNodeVersion() {
+  var major = MIN_NODE_VERSION / 10000
+  var minor = (MIN_NODE_VERSION / 100) % 100
+  var rev = MIN_NODE_VERSION % 100
+  return `v${major}.${minor}.${rev}`;
+}

src/shell.js

@@ -177,6 +177,17 @@ if (ENVIRONMENT_IS_NODE) {
 #if ENVIRONMENT && ASSERTIONS
   if (typeof process == 'undefined' || !process.release || process.release.name !== 'node') throw new Error('not compiled for this environment (did you build to HTML and try to run it not on the web, or set ENVIRONMENT to something - like node - and run it someplace else - like on the web?)');
 #endif
+
+#if ASSERTIONS
+  var nodeVersion = process.versions.node;
+  var numericVersion = nodeVersion.split('.').slice(0, 3);
+  numericVersion = (numericVersion[0] * 10000) + (numericVersion[1] * 100) + numericVersion[2] * 1;
+  var minVersion = {{{ MIN_NODE_VERSION }}};
+  if (numericVersion < {{{ MIN_NODE_VERSION }}}) {
+    throw new Error('This emscripten-generated code requires node {{{ formattedMinNodeVersion() }}} (detected v' + nodeVersion + ')');
+  }
+#endif
+
   // `require()` is no-op in an ESM module, use `createRequire()` to construct
   // the require()` function.  This is only necessary for multi-environment
   // builds, `-sENVIRONMENT=node` emits a static import declaration instead.

test/test_other.py

@@ -13026,3 +13026,10 @@ def test_parseTools_legacy(self):
     self.set_setting('DEFAULT_LIBRARY_FUNCS_TO_INCLUDE', 'foo')
     self.do_runf(test_file('hello_world.c'), '4\nhello, world!',
                  emcc_args=['--post-js=post.js', '--js-library=lib.js'])
+
+  def test_min_node_version(self):
+    node_version = shared.check_node_version()
+    node_version = '.'.join(str(x) for x in node_version)
+    self.set_setting('MIN_NODE_VERSION', 210000)
+    expected = 'This emscripten-generated code requires node v21.0.0 (detected v%s)' % node_version
+    self.do_runf(test_file('hello_world.c'), expected, assert_returncode=NON_ZERO)