vue hello world项目
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3 years ago
// @ts-check
/** @typedef {import("webpack/lib/Compilation.js")} WebpackCompilation */
/** @typedef {import("webpack/lib/FileSystemInfo").Snapshot} Snapshot */
'use strict';
/**
*
* @param {{fileDependencies: string[], contextDependencies: string[], missingDependencies: string[]}} fileDependencies
* @param {WebpackCompilation} mainCompilation
* @param {number} startTime
*/
function createSnapshot (fileDependencies, mainCompilation, startTime) {
return new Promise((resolve, reject) => {
mainCompilation.fileSystemInfo.createSnapshot(
startTime,
fileDependencies.fileDependencies,
fileDependencies.contextDependencies,
fileDependencies.missingDependencies,
null,
(err, snapshot) => {
if (err) {
return reject(err);
}
resolve(snapshot);
}
);
});
}
/**
* Returns true if the files inside this snapshot
* have not been changed
*
* @param {Snapshot} snapshot
* @param {WebpackCompilation} mainCompilation
* @returns {Promise<boolean>}
*/
function isSnapShotValid (snapshot, mainCompilation) {
return new Promise((resolve, reject) => {
mainCompilation.fileSystemInfo.checkSnapshotValid(
snapshot,
(err, isValid) => {
if (err) {
reject(err);
}
resolve(isValid);
}
);
});
}
/**
* Ensure that the files keep watched for changes
* and will trigger a recompile
*
* @param {WebpackCompilation} mainCompilation
* @param {{fileDependencies: string[], contextDependencies: string[], missingDependencies: string[]}} fileDependencies
*/
function watchFiles (mainCompilation, fileDependencies) {
Object.keys(fileDependencies).forEach((depencyTypes) => {
fileDependencies[depencyTypes].forEach(fileDependency => {
mainCompilation[depencyTypes].add(fileDependency);
});
});
}
module.exports = {
createSnapshot,
isSnapShotValid,
watchFiles
};