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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const Template = require("../Template");
module.exports = class NodeMainTemplatePlugin {
constructor(asyncChunkLoading) {
this.asyncChunkLoading = asyncChunkLoading;
}
apply(mainTemplate) {
const needChunkOnDemandLoadingCode = chunk => {
for (const chunkGroup of chunk.groupsIterable) {
if (chunkGroup.getNumberOfChildren() > 0) return true;
}
return false;
};
const asyncChunkLoading = this.asyncChunkLoading;
mainTemplate.hooks.localVars.tap(
"NodeMainTemplatePlugin",
(source, chunk) => {
if (needChunkOnDemandLoadingCode(chunk)) {
return Template.asString([
source,
"",
"// object to store loaded chunks",
'// "0" means "already loaded"',
"var installedChunks = {",
Template.indent(
chunk.ids.map(id => `${JSON.stringify(id)}: 0`).join(",\n")
),
"};"
]);
}
return source;
}
);
mainTemplate.hooks.requireExtensions.tap(
"NodeMainTemplatePlugin",
(source, chunk) => {
if (needChunkOnDemandLoadingCode(chunk)) {
return Template.asString([
source,
"",
"// uncaught error handler for webpack runtime",
`${mainTemplate.requireFn}.oe = function(err) {`,
Template.indent([
"process.nextTick(function() {",
Template.indent(
"throw err; // catch this error by using import().catch()"
),
"});"
]),
"};"
]);
}
return source;
}
);
mainTemplate.hooks.requireEnsure.tap(
"NodeMainTemplatePlugin",
(source, chunk, hash) => {
const chunkFilename = mainTemplate.outputOptions.chunkFilename;
const chunkMaps = chunk.getChunkMaps();
const insertMoreModules = [
"var moreModules = chunk.modules, chunkIds = chunk.ids;",
"for(var moduleId in moreModules) {",
Template.indent(
mainTemplate.renderAddModule(
hash,
chunk,
"moduleId",
"moreModules[moduleId]"
)
),
"}"
];
if (asyncChunkLoading) {
return Template.asString([
source,
"",
"// ReadFile + VM.run chunk loading for javascript",
"",
"var installedChunkData = installedChunks[chunkId];",
'if(installedChunkData !== 0) { // 0 means "already installed".',
Template.indent([
'// array of [resolve, reject, promise] means "currently loading"',
"if(installedChunkData) {",
Template.indent(["promises.push(installedChunkData[2]);"]),
"} else {",
Template.indent([
"// load the chunk and return promise to it",
"var promise = new Promise(function(resolve, reject) {",
Template.indent([
"installedChunkData = installedChunks[chunkId] = [resolve, reject];",
"var filename = require('path').join(__dirname, " +
mainTemplate.getAssetPath(
JSON.stringify(`/${chunkFilename}`),
{
hash: `" + ${mainTemplate.renderCurrentHashCode(
hash
)} + "`,
hashWithLength: length =>
`" + ${mainTemplate.renderCurrentHashCode(
hash,
length
)} + "`,
chunk: {
id: '" + chunkId + "',
hash: `" + ${JSON.stringify(
chunkMaps.hash
)}[chunkId] + "`,
hashWithLength: length => {
const shortChunkHashMap = {};
for (const chunkId of Object.keys(chunkMaps.hash)) {
if (typeof chunkMaps.hash[chunkId] === "string") {
shortChunkHashMap[chunkId] = chunkMaps.hash[
chunkId
].substr(0, length);
}
}
return `" + ${JSON.stringify(
shortChunkHashMap
)}[chunkId] + "`;
},
contentHash: {
javascript: `" + ${JSON.stringify(
chunkMaps.contentHash.javascript
)}[chunkId] + "`
},
contentHashWithLength: {
javascript: length => {
const shortContentHashMap = {};
const contentHash =
chunkMaps.contentHash.javascript;
for (const chunkId of Object.keys(contentHash)) {
if (typeof contentHash[chunkId] === "string") {
shortContentHashMap[chunkId] = contentHash[
chunkId
].substr(0, length);
}
}
return `" + ${JSON.stringify(
shortContentHashMap
)}[chunkId] + "`;
}
},
name: `" + (${JSON.stringify(
chunkMaps.name
)}[chunkId]||chunkId) + "`
},
contentHashType: "javascript"
}
) +
");",
"require('fs').readFile(filename, 'utf-8', function(err, content) {",
Template.indent(
[
"if(err) return reject(err);",
"var chunk = {};",
"require('vm').runInThisContext('(function(exports, require, __dirname, __filename) {' + content + '\\n})', filename)" +
"(chunk, require, require('path').dirname(filename), filename);"
]
.concat(insertMoreModules)
.concat([
"var callbacks = [];",
"for(var i = 0; i < chunkIds.length; i++) {",
Template.indent([
"if(installedChunks[chunkIds[i]])",
Template.indent([
"callbacks = callbacks.concat(installedChunks[chunkIds[i]][0]);"
]),
"installedChunks[chunkIds[i]] = 0;"
]),
"}",
"for(i = 0; i < callbacks.length; i++)",
Template.indent("callbacks[i]();")
])
),
"});"
]),
"});",
"promises.push(installedChunkData[2] = promise);"
]),
"}"
]),
"}"
]);
} else {
const request = mainTemplate.getAssetPath(
JSON.stringify(`./${chunkFilename}`),
{
hash: `" + ${mainTemplate.renderCurrentHashCode(hash)} + "`,
hashWithLength: length =>
`" + ${mainTemplate.renderCurrentHashCode(hash, length)} + "`,
chunk: {
id: '" + chunkId + "',
hash: `" + ${JSON.stringify(chunkMaps.hash)}[chunkId] + "`,
hashWithLength: length => {
const shortChunkHashMap = {};
for (const chunkId of Object.keys(chunkMaps.hash)) {
if (typeof chunkMaps.hash[chunkId] === "string") {
shortChunkHashMap[chunkId] = chunkMaps.hash[
chunkId
].substr(0, length);
}
}
return `" + ${JSON.stringify(
shortChunkHashMap
)}[chunkId] + "`;
},
contentHash: {
javascript: `" + ${JSON.stringify(
chunkMaps.contentHash.javascript
)}[chunkId] + "`
},
contentHashWithLength: {
javascript: length => {
const shortContentHashMap = {};
const contentHash = chunkMaps.contentHash.javascript;
for (const chunkId of Object.keys(contentHash)) {
if (typeof contentHash[chunkId] === "string") {
shortContentHashMap[chunkId] = contentHash[
chunkId
].substr(0, length);
}
}
return `" + ${JSON.stringify(
shortContentHashMap
)}[chunkId] + "`;
}
},
name: `" + (${JSON.stringify(
chunkMaps.name
)}[chunkId]||chunkId) + "`
},
contentHashType: "javascript"
}
);
return Template.asString([
source,
"",
"// require() chunk loading for javascript",
"",
'// "0" is the signal for "already loaded"',
"if(installedChunks[chunkId] !== 0) {",
Template.indent(
[`var chunk = require(${request});`]
.concat(insertMoreModules)
.concat([
"for(var i = 0; i < chunkIds.length; i++)",
Template.indent("installedChunks[chunkIds[i]] = 0;")
])
),
"}"
]);
}
}
);
mainTemplate.hooks.hotBootstrap.tap(
"NodeMainTemplatePlugin",
(source, chunk, hash) => {
const hotUpdateChunkFilename =
mainTemplate.outputOptions.hotUpdateChunkFilename;
const hotUpdateMainFilename =
mainTemplate.outputOptions.hotUpdateMainFilename;
const chunkMaps = chunk.getChunkMaps();
const currentHotUpdateChunkFilename = mainTemplate.getAssetPath(
JSON.stringify(hotUpdateChunkFilename),
{
hash: `" + ${mainTemplate.renderCurrentHashCode(hash)} + "`,
hashWithLength: length =>
`" + ${mainTemplate.renderCurrentHashCode(hash, length)} + "`,
chunk: {
id: '" + chunkId + "',
hash: `" + ${JSON.stringify(chunkMaps.hash)}[chunkId] + "`,
hashWithLength: length => {
const shortChunkHashMap = {};
for (const chunkId of Object.keys(chunkMaps.hash)) {
if (typeof chunkMaps.hash[chunkId] === "string") {
shortChunkHashMap[chunkId] = chunkMaps.hash[chunkId].substr(
0,
length
);
}
}
return `" + ${JSON.stringify(shortChunkHashMap)}[chunkId] + "`;
},
name: `" + (${JSON.stringify(
chunkMaps.name
)}[chunkId]||chunkId) + "`
}
}
);
const currentHotUpdateMainFilename = mainTemplate.getAssetPath(
JSON.stringify(hotUpdateMainFilename),
{
hash: `" + ${mainTemplate.renderCurrentHashCode(hash)} + "`,
hashWithLength: length =>
`" + ${mainTemplate.renderCurrentHashCode(hash, length)} + "`
}
);
return Template.getFunctionContent(
asyncChunkLoading
? require("./NodeMainTemplateAsync.runtime")
: require("./NodeMainTemplate.runtime")
)
.replace(/\$require\$/g, mainTemplate.requireFn)
.replace(/\$hotMainFilename\$/g, currentHotUpdateMainFilename)
.replace(/\$hotChunkFilename\$/g, currentHotUpdateChunkFilename);
}
);
mainTemplate.hooks.hash.tap("NodeMainTemplatePlugin", hash => {
hash.update("node");
hash.update("4");
});
}
};