[js] Disable stuff in the browser in an ugly manner

This allows parcel to bundle nqp::say('Hello World')

Author: pmurias

src/vm/js/nqp-runtime/browser.js

@@ -0,0 +1,7 @@
+const op = {};
+exports.op = op;
+
+op.say = function(arg) {
+  console.log(arg);
+  return arg;
+};

src/vm/js/nqp-runtime/core.js

@@ -3,7 +3,7 @@
 const op = {};
 exports.op = op;
 
-const os = require('os');
+const os = process.browser ? null : require('os');
 
 const Hash = require('./hash.js');
 const CodeRef = require('./code-ref.js');
@@ -57,9 +57,9 @@ const unicodeCollationAlgorithm = require('unicode-collation-algorithm');
 
 const unicodeData = require('nqp-unicode-data');
 
-const resolveSourceMap = require('./resolve-sourcemap.js');
+const resolveSourceMap = process.browser ? null : require('./resolve-sourcemap.js');
 
-const path = require('path');
+const path = process.browser ? null : require('path');
 
 const nullStr = require('./null_s.js');
 
@@ -649,7 +649,7 @@ function toJS(obj) {
 
 const nqp = require('./runtime.js');
 
-const Script = require('vm').Script;
+const Script = process.browser ? null : require('vm').Script;
 
 const sourceMaps = {};
 const evaledP6Sources = {};
@@ -865,7 +865,7 @@ op.getcomp = function(language) {
   return compilerRegistry.has(language) ? compilerRegistry.get(language) : Null;
 };
 
-const child_process = require('child_process');
+const child_process = process.browser ? null : require('child_process');
 
 function getConfigFromPerl() {
   const perlScript = `
@@ -1325,8 +1325,8 @@ op.replace = function(str, offset, count, repl) {
   return str.substr(0, offset) + repl + str.substr(offset + count);
 };
 
-const fs = require('fs');
-const sourceMapResolve = require('source-map-resolve');
+const fs = process.browser ? null : require('fs');
+const sourceMapResolve = process.browser ? null : require('source-map-resolve');
 
 op.getcodelocation = function(code) {
   let sourcePath;

src/vm/js/nqp-runtime/exceptions-stack.js

@@ -1,4 +1,4 @@
-const fibers = require('fibers');
+const fibers = process.browser ? {} : require('fibers');
 const globalStack = [];
 module.exports = function() {
   if (fibers.current === undefined) {

src/vm/js/nqp-runtime/reprs.js

@@ -13,10 +13,10 @@ const nqp = require('./runtime.js');
 
 const constants = require('./constants.js');
 
-const ref = require('ref');
+const ref = process.browser ? null : require('ref');
 
-const Union = require('ref-union');
-const StructType = require('ref-struct');
+const Union = process.browser ? null : require('ref-union');
+const StructType = process.browser ? null : require('ref-struct');
 
 const codecs = require('./codecs.js');
 

src/vm/js/nqp-runtime/runtime.js

@@ -33,7 +33,7 @@ const stripMarks = require('./strip-marks.js');
 const foldCase = require('fold-case');
 const graphemes = require('./graphemes.js');
 
-const fs = require('fs');
+const fs = process.browser ? null : require('fs');
 
 
 exports.NQPInt = NQPInt;
@@ -63,8 +63,12 @@ exports.strToObj = core.strToObj;
 
 exports.EvalResult = core.EvalResult;
 
-const io = require('./io.js');
-loadOps(io);
+if (!process.browser) {
+  const io = require('./io.js');
+  loadOps(io);
+} else {
+  loadOps(require('./browser.js'));
+}
 
 const bignum = require('./bignum.js');
 loadOps(bignum);
@@ -87,13 +91,15 @@ loadOps(deserialization);
 const serialization = require('./serialization.js');
 loadOps(serialization);
 
-const nativecall = require('./nativecall.js');
-loadOps(nativecall);
+if (!process.browser) {
+  const nativecall = require('./nativecall.js');
+  loadOps(nativecall);
+}
 
 const CodeRef = require('./code-ref.js');
 exports.CodeRef = CodeRef;
 
-const continuations = require('./fiber-continuations.js');
+const continuations = process.browser ? require('./async-continuations.js') : require('./fiber-continuations.js');
 loadOps(continuations);
 
 exports.CodeRefWithStateVars = require('./code-ref-with-statevars.js');