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hexo/node_modules/nan/tools/1to2.js

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#!/usr/bin/env node
/*********************************************************************
* NAN - Native Abstractions for Node.js
*
* Copyright (c) 2018 NAN contributors
*
* MIT License <https://github.com/nodejs/nan/blob/master/LICENSE.md>
********************************************************************/
var commander = require('commander'),
fs = require('fs'),
glob = require('glob'),
groups = [],
total = 0,
warning1 = '/* ERROR: Rewrite using Buffer */\n',
warning2 = '\\/\\* ERROR\\: Rewrite using Buffer \\*\\/\\n',
length,
i;
fs.readFile(__dirname + '/package.json', 'utf8', function (err, data) {
if (err) {
throw err;
}
commander
.version(JSON.parse(data).version)
.usage('[options] <file ...>')
.parse(process.argv);
if (!process.argv.slice(2).length) {
commander.outputHelp();
}
});
/* construct strings representing regular expressions
each expression contains a unique group allowing for identification of the match
the index of this key group, relative to the regular expression in question,
is indicated by the first array member */
/* simple substistutions, key group is the entire match, 0 */
groups.push([0, [
'_NAN_',
'NODE_SET_METHOD',
'NODE_SET_PROTOTYPE_METHOD',
'NanAsciiString',
'NanEscapeScope',
'NanReturnValue',
'NanUcs2String'].join('|')]);
/* substitutions of parameterless macros, key group is 1 */
groups.push([1, ['(', [
'NanEscapableScope',
'NanReturnNull',
'NanReturnUndefined',
'NanScope'].join('|'), ')\\(\\)'].join('')]);
/* replace TryCatch with NanTryCatch once, gobbling possible namespace, key group 2 */
groups.push([2, '(?:(?:v8\\:\\:)?|(Nan)?)(TryCatch)']);
/* NanNew("string") will likely not fail a ToLocalChecked(), key group 1 */
groups.push([1, ['(NanNew)', '(\\("[^\\"]*"[^\\)]*\\))(?!\\.ToLocalChecked\\(\\))'].join('')]);
/* Removed v8 APIs, warn that the code needs rewriting using node::Buffer, key group 2 */
groups.push([2, ['(', warning2, ')?', '^.*?(', [
'GetIndexedPropertiesExternalArrayDataLength',
'GetIndexedPropertiesExternalArrayData',
'GetIndexedPropertiesExternalArrayDataType',
'GetIndexedPropertiesPixelData',
'GetIndexedPropertiesPixelDataLength',
'HasIndexedPropertiesInExternalArrayData',
'HasIndexedPropertiesInPixelData',
'SetIndexedPropertiesToExternalArrayData',
'SetIndexedPropertiesToPixelData'].join('|'), ')'].join('')]);
/* No need for NanScope in V8-exposed methods, key group 2 */
groups.push([2, ['((', [
'NAN_METHOD',
'NAN_GETTER',
'NAN_SETTER',
'NAN_PROPERTY_GETTER',
'NAN_PROPERTY_SETTER',
'NAN_PROPERTY_ENUMERATOR',
'NAN_PROPERTY_DELETER',
'NAN_PROPERTY_QUERY',
'NAN_INDEX_GETTER',
'NAN_INDEX_SETTER',
'NAN_INDEX_ENUMERATOR',
'NAN_INDEX_DELETER',
'NAN_INDEX_QUERY'].join('|'), ')\\([^\\)]*\\)\\s*\\{)\\s*NanScope\\(\\)\\s*;'].join('')]);
/* v8::Value::ToXXXXXXX returns v8::MaybeLocal<T>, key group 3 */
groups.push([3, ['([\\s\\(\\)])([^\\s\\(\\)]+)->(', [
'Boolean',
'Number',
'String',
'Object',
'Integer',
'Uint32',
'Int32'].join('|'), ')\\('].join('')]);
/* v8::Value::XXXXXXXValue returns v8::Maybe<T>, key group 3 */
groups.push([3, ['([\\s\\(\\)])([^\\s\\(\\)]+)->((?:', [
'Boolean',
'Number',
'Integer',
'Uint32',
'Int32'].join('|'), ')Value)\\('].join('')]);
/* NAN_WEAK_CALLBACK macro was removed, write out callback definition, key group 1 */
groups.push([1, '(NAN_WEAK_CALLBACK)\\(([^\\s\\)]+)\\)']);
/* node::ObjectWrap and v8::Persistent have been replaced with Nan implementations, key group 1 */
groups.push([1, ['(', [
'NanDisposePersistent',
'NanObjectWrapHandle'].join('|'), ')\\s*\\(\\s*([^\\s\\)]+)'].join('')]);
/* Since NanPersistent there is no need for NanMakeWeakPersistent, key group 1 */
groups.push([1, '(NanMakeWeakPersistent)\\s*\\(\\s*([^\\s,]+)\\s*,\\s*']);
/* Many methods of v8::Object and others now return v8::MaybeLocal<T>, key group 3 */
groups.push([3, ['([\\s])([^\\s]+)->(', [
'GetEndColumn',
'GetFunction',
'GetLineNumber',
'NewInstance',
'GetPropertyNames',
'GetOwnPropertyNames',
'GetSourceLine',
'GetStartColumn',
'ObjectProtoToString',
'ToArrayIndex',
'ToDetailString',
'CallAsConstructor',
'CallAsFunction',
'CloneElementAt',
'Delete',
'ForceSet',
'Get',
'GetPropertyAttributes',
'GetRealNamedProperty',
'GetRealNamedPropertyInPrototypeChain',
'Has',
'HasOwnProperty',
'HasRealIndexedProperty',
'HasRealNamedCallbackProperty',
'HasRealNamedProperty',
'Set',
'SetAccessor',
'SetIndexedPropertyHandler',
'SetNamedPropertyHandler',
'SetPrototype'].join('|'), ')\\('].join('')]);
/* You should get an error if any of these fail anyways,
or handle the error better, it is indicated either way, key group 2 */
groups.push([2, ['NanNew(<(?:v8\\:\\:)?(', ['Date', 'String', 'RegExp'].join('|'), ')>)(\\([^\\)]*\\))(?!\\.ToLocalChecked\\(\\))'].join('')]);
/* v8::Value::Equals now returns a v8::Maybe, key group 3 */
groups.push([3, '([\\s\\(\\)])([^\\s\\(\\)]+)->(Equals)\\(([^\\s\\)]+)']);
/* NanPersistent makes this unnecessary, key group 1 */
groups.push([1, '(NanAssignPersistent)(?:<v8\\:\\:[^>]+>)?\\(([^,]+),\\s*']);
/* args has been renamed to info, key group 2 */
groups.push([2, '(\\W)(args)(\\W)'])
/* node::ObjectWrap was replaced with NanObjectWrap, key group 2 */
groups.push([2, '(\\W)(?:node\\:\\:)?(ObjectWrap)(\\W)']);
/* v8::Persistent was replaced with NanPersistent, key group 2 */
groups.push([2, '(\\W)(?:v8\\:\\:)?(Persistent)(\\W)']);
/* counts the number of capturing groups in a well-formed regular expression,
ignoring non-capturing groups and escaped parentheses */
function groupcount(s) {
var positive = s.match(/\((?!\?)/g),
negative = s.match(/\\\(/g);
return (positive ? positive.length : 0) - (negative ? negative.length : 0);
}
/* compute the absolute position of each key group in the joined master RegExp */
for (i = 1, length = groups.length; i < length; i++) {
total += groupcount(groups[i - 1][1]);
groups[i][0] += total;
}
/* create the master RegExp, which is the union of all the groups' expressions */
master = new RegExp(groups.map(function (a) { return a[1]; }).join('|'), 'gm');
/* replacement function for String.replace, receives 21 arguments */
function replace() {
/* simple expressions */
switch (arguments[groups[0][0]]) {
case '_NAN_':
return 'NAN_';
case 'NODE_SET_METHOD':
return 'NanSetMethod';
case 'NODE_SET_PROTOTYPE_METHOD':
return 'NanSetPrototypeMethod';
case 'NanAsciiString':
return 'NanUtf8String';
case 'NanEscapeScope':
return 'scope.Escape';
case 'NanReturnNull':
return 'info.GetReturnValue().SetNull';
case 'NanReturnValue':
return 'info.GetReturnValue().Set';
case 'NanUcs2String':
return 'v8::String::Value';
default:
}
/* macros without arguments */
switch (arguments[groups[1][0]]) {
case 'NanEscapableScope':
return 'NanEscapableScope scope'
case 'NanReturnUndefined':
return 'return';
case 'NanScope':
return 'NanScope scope';
default:
}
/* TryCatch, emulate negative backref */
if (arguments[groups[2][0]] === 'TryCatch') {
return arguments[groups[2][0] - 1] ? arguments[0] : 'NanTryCatch';
}
/* NanNew("foo") --> NanNew("foo").ToLocalChecked() */
if (arguments[groups[3][0]] === 'NanNew') {
return [arguments[0], '.ToLocalChecked()'].join('');
}
/* insert warning for removed functions as comment on new line above */
switch (arguments[groups[4][0]]) {
case 'GetIndexedPropertiesExternalArrayData':
case 'GetIndexedPropertiesExternalArrayDataLength':
case 'GetIndexedPropertiesExternalArrayDataType':
case 'GetIndexedPropertiesPixelData':
case 'GetIndexedPropertiesPixelDataLength':
case 'HasIndexedPropertiesInExternalArrayData':
case 'HasIndexedPropertiesInPixelData':
case 'SetIndexedPropertiesToExternalArrayData':
case 'SetIndexedPropertiesToPixelData':
return arguments[groups[4][0] - 1] ? arguments[0] : [warning1, arguments[0]].join('');
default:
}
/* remove unnecessary NanScope() */
switch (arguments[groups[5][0]]) {
case 'NAN_GETTER':
case 'NAN_METHOD':
case 'NAN_SETTER':
case 'NAN_INDEX_DELETER':
case 'NAN_INDEX_ENUMERATOR':
case 'NAN_INDEX_GETTER':
case 'NAN_INDEX_QUERY':
case 'NAN_INDEX_SETTER':
case 'NAN_PROPERTY_DELETER':
case 'NAN_PROPERTY_ENUMERATOR':
case 'NAN_PROPERTY_GETTER':
case 'NAN_PROPERTY_QUERY':
case 'NAN_PROPERTY_SETTER':
return arguments[groups[5][0] - 1];
default:
}
/* Value conversion */
switch (arguments[groups[6][0]]) {
case 'Boolean':
case 'Int32':
case 'Integer':
case 'Number':
case 'Object':
case 'String':
case 'Uint32':
return [arguments[groups[6][0] - 2], 'NanTo<v8::', arguments[groups[6][0]], '>(', arguments[groups[6][0] - 1]].join('');
default:
}
/* other value conversion */
switch (arguments[groups[7][0]]) {
case 'BooleanValue':
return [arguments[groups[7][0] - 2], 'NanTo<bool>(', arguments[groups[7][0] - 1]].join('');
case 'Int32Value':
return [arguments[groups[7][0] - 2], 'NanTo<int32_t>(', arguments[groups[7][0] - 1]].join('');
case 'IntegerValue':
return [arguments[groups[7][0] - 2], 'NanTo<int64_t>(', arguments[groups[7][0] - 1]].join('');
case 'Uint32Value':
return [arguments[groups[7][0] - 2], 'NanTo<uint32_t>(', arguments[groups[7][0] - 1]].join('');
default:
}
/* NAN_WEAK_CALLBACK */
if (arguments[groups[8][0]] === 'NAN_WEAK_CALLBACK') {
return ['template<typename T>\nvoid ',
arguments[groups[8][0] + 1], '(const NanWeakCallbackInfo<T> &data)'].join('');
}
/* use methods on NAN classes instead */
switch (arguments[groups[9][0]]) {
case 'NanDisposePersistent':
return [arguments[groups[9][0] + 1], '.Reset('].join('');
case 'NanObjectWrapHandle':
return [arguments[groups[9][0] + 1], '->handle('].join('');
default:
}
/* use method on NanPersistent instead */
if (arguments[groups[10][0]] === 'NanMakeWeakPersistent') {
return arguments[groups[10][0] + 1] + '.SetWeak(';
}
/* These return Maybes, the upper ones take no arguments */
switch (arguments[groups[11][0]]) {
case 'GetEndColumn':
case 'GetFunction':
case 'GetLineNumber':
case 'GetOwnPropertyNames':
case 'GetPropertyNames':
case 'GetSourceLine':
case 'GetStartColumn':
case 'NewInstance':
case 'ObjectProtoToString':
case 'ToArrayIndex':
case 'ToDetailString':
return [arguments[groups[11][0] - 2], 'Nan', arguments[groups[11][0]], '(', arguments[groups[11][0] - 1]].join('');
case 'CallAsConstructor':
case 'CallAsFunction':
case 'CloneElementAt':
case 'Delete':
case 'ForceSet':
case 'Get':
case 'GetPropertyAttributes':
case 'GetRealNamedProperty':
case 'GetRealNamedPropertyInPrototypeChain':
case 'Has':
case 'HasOwnProperty':
case 'HasRealIndexedProperty':
case 'HasRealNamedCallbackProperty':
case 'HasRealNamedProperty':
case 'Set':
case 'SetAccessor':
case 'SetIndexedPropertyHandler':
case 'SetNamedPropertyHandler':
case 'SetPrototype':
return [arguments[groups[11][0] - 2], 'Nan', arguments[groups[11][0]], '(', arguments[groups[11][0] - 1], ', '].join('');
default:
}
/* Automatic ToLocalChecked(), take it or leave it */
switch (arguments[groups[12][0]]) {
case 'Date':
case 'String':
case 'RegExp':
return ['NanNew', arguments[groups[12][0] - 1], arguments[groups[12][0] + 1], '.ToLocalChecked()'].join('');
default:
}
/* NanEquals is now required for uniformity */
if (arguments[groups[13][0]] === 'Equals') {
return [arguments[groups[13][0] - 1], 'NanEquals(', arguments[groups[13][0] - 1], ', ', arguments[groups[13][0] + 1]].join('');
}
/* use method on replacement class instead */
if (arguments[groups[14][0]] === 'NanAssignPersistent') {
return [arguments[groups[14][0] + 1], '.Reset('].join('');
}
/* args --> info */
if (arguments[groups[15][0]] === 'args') {
return [arguments[groups[15][0] - 1], 'info', arguments[groups[15][0] + 1]].join('');
}
/* ObjectWrap --> NanObjectWrap */
if (arguments[groups[16][0]] === 'ObjectWrap') {
return [arguments[groups[16][0] - 1], 'NanObjectWrap', arguments[groups[16][0] + 1]].join('');
}
/* Persistent --> NanPersistent */
if (arguments[groups[17][0]] === 'Persistent') {
return [arguments[groups[17][0] - 1], 'NanPersistent', arguments[groups[17][0] + 1]].join('');
}
/* This should not happen. A switch is probably missing a case if it does. */
throw 'Unhandled match: ' + arguments[0];
}
/* reads a file, runs replacement and writes it back */
function processFile(file) {
fs.readFile(file, {encoding: 'utf8'}, function (err, data) {
if (err) {
throw err;
}
/* run replacement twice, might need more runs */
fs.writeFile(file, data.replace(master, replace).replace(master, replace), function (err) {
if (err) {
throw err;
}
});
});
}
/* process file names from command line and process the identified files */
for (i = 2, length = process.argv.length; i < length; i++) {
glob(process.argv[i], function (err, matches) {
if (err) {
throw err;
}
matches.forEach(processFile);
});
}
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