From ef88b391a785009059c71f20fd8c50e01b64cd14 Mon Sep 17 00:00:00 2001
From: Andrew Bradley <cspotcode@gmail.com>
Date: Tue, 28 Jul 2020 22:04:47 -0400
Subject: [PATCH] Fix #1072

---
 dist-raw/node-esm-resolve-implementation.js | 32 +-------
 dist-raw/node-options.js                    | 83 +++++++++++++++++++++
 2 files changed, 84 insertions(+), 31 deletions(-)
 create mode 100644 dist-raw/node-options.js

diff --git a/dist-raw/node-esm-resolve-implementation.js b/dist-raw/node-esm-resolve-implementation.js
index 1a5846673..a3da2f9a0 100644
--- a/dist-raw/node-esm-resolve-implementation.js
+++ b/dist-raw/node-esm-resolve-implementation.js
@@ -50,37 +50,7 @@ const {
   Stats,
 } = require('fs');
 // const { getOptionValue } = require('internal/options');
-const { getOptionValue } = (() => {
-  let options;
-  function parseOptions() {
-    if (!options) {
-      options = {
-      '--preserve-symlinks': false,
-      '--preserve-symlinks-main': false,
-      '--input-type': undefined,
-      '--experimental-specifier-resolution': 'explicit',
-      ...parseExecArgv()
-      }
-    }
-  };
-  function parseExecArgv () {
-    return require('arg')({
-      '--preserve-symlinks': Boolean,
-      '--preserve-symlinks-main': Boolean,
-      '--input-type': String,
-      '--experimental-specifier-resolution': String
-    }, {
-      argv: process.execArgv,
-      permissive: true
-    });
-  }
-  return {
-      getOptionValue: (opt) => {
-        parseOptions();
-        return options[opt];
-      }
-  };
-})();
+const { getOptionValue } = require('./node-options');
 const { sep } = require('path');
 
 const preserveSymlinks = getOptionValue('--preserve-symlinks');
diff --git a/dist-raw/node-options.js b/dist-raw/node-options.js
new file mode 100644
index 000000000..f27a44689
--- /dev/null
+++ b/dist-raw/node-options.js
@@ -0,0 +1,83 @@
+// Replacement for node's internal 'internal/options' module
+
+exports.getOptionValue = getOptionValue;
+function getOptionValue(opt) {
+  parseOptions();
+  return options[opt];
+}
+
+let options;
+function parseOptions() {
+  if (!options) {
+    options = {
+      '--preserve-symlinks': false,
+      '--preserve-symlinks-main': false,
+      '--input-type': undefined,
+      '--experimental-specifier-resolution': 'explicit',
+      ...parseArgv(getNodeOptionsEnvArgv()),
+      ...parseArgv(process.execArgv)
+    }
+  }
+}
+
+function parseArgv(argv) {
+  return require('arg')({
+    '--preserve-symlinks': Boolean,
+    '--preserve-symlinks-main': Boolean,
+    '--input-type': String,
+    '--experimental-specifier-resolution': String
+  }, {
+    argv,
+    permissive: true
+  });
+}
+
+function getNodeOptionsEnvArgv() {
+  const errors = [];
+  const envArgv = ParseNodeOptionsEnvVar(process.env.NODE_OPTIONS || '', errors);
+  if (errors.length !== 0) {
+    // TODO: handle errors somehow
+  }
+  return envArgv;
+}
+
+// Direct JS port of C implementation: https://github.com/nodejs/node/blob/67ba825037b4082d5d16f922fb9ce54516b4a869/src/node_options.cc#L1024-L1063
+function ParseNodeOptionsEnvVar(node_options, errors) {
+  const env_argv = [];
+
+  let is_in_string = false;
+  let will_start_new_arg = true;
+  for (let index = 0; index < node_options.length; ++index) {
+      let c = node_options[index];
+
+      // Backslashes escape the following character
+      if (c === '\\' && is_in_string) {
+          if (index + 1 === node_options.length) {
+              errors.push("invalid value for NODE_OPTIONS " +
+                  "(invalid escape)\n");
+              return env_argv;
+          } else {
+              c = node_options[++index];
+          }
+      } else if (c === ' ' && !is_in_string) {
+          will_start_new_arg = true;
+          continue;
+      } else if (c === '"') {
+          is_in_string = !is_in_string;
+          continue;
+      }
+
+      if (will_start_new_arg) {
+          env_argv.push(c);
+          will_start_new_arg = false;
+      } else {
+          env_argv[env_argv.length - 1] += c;
+      }
+  }
+
+  if (is_in_string) {
+      errors.push("invalid value for NODE_OPTIONS " +
+          "(unterminated string)\n");
+  }
+  return env_argv;
+}