vue hello world项目
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'use strict';
const path = require('path');
const emojisList = require('emojis-list');
const getHashDigest = require('./getHashDigest');
const emojiRegex = /[\uD800-\uDFFF]./;
const emojiList = emojisList.filter((emoji) => emojiRegex.test(emoji));
const emojiCache = {};
function encodeStringToEmoji(content, length) {
if (emojiCache[content]) {
return emojiCache[content];
}
length = length || 1;
const emojis = [];
do {
if (!emojiList.length) {
throw new Error('Ran out of emoji');
}
const index = Math.floor(Math.random() * emojiList.length);
emojis.push(emojiList[index]);
emojiList.splice(index, 1);
} while (--length > 0);
const emojiEncoding = emojis.join('');
emojiCache[content] = emojiEncoding;
return emojiEncoding;
}
function interpolateName(loaderContext, name, options) {
let filename;
const hasQuery =
loaderContext.resourceQuery && loaderContext.resourceQuery.length > 1;
if (typeof name === 'function') {
filename = name(
loaderContext.resourcePath,
hasQuery ? loaderContext.resourceQuery : undefined
);
} else {
filename = name || '[hash].[ext]';
}
const context = options.context;
const content = options.content;
const regExp = options.regExp;
let ext = 'bin';
let basename = 'file';
let directory = '';
let folder = '';
let query = '';
if (loaderContext.resourcePath) {
const parsed = path.parse(loaderContext.resourcePath);
let resourcePath = loaderContext.resourcePath;
if (parsed.ext) {
ext = parsed.ext.substr(1);
}
if (parsed.dir) {
basename = parsed.name;
resourcePath = parsed.dir + path.sep;
}
if (typeof context !== 'undefined') {
directory = path
.relative(context, resourcePath + '_')
.replace(/\\/g, '/')
.replace(/\.\.(\/)?/g, '_$1');
directory = directory.substr(0, directory.length - 1);
} else {
directory = resourcePath.replace(/\\/g, '/').replace(/\.\.(\/)?/g, '_$1');
}
if (directory.length === 1) {
directory = '';
} else if (directory.length > 1) {
folder = path.basename(directory);
}
}
if (loaderContext.resourceQuery && loaderContext.resourceQuery.length > 1) {
query = loaderContext.resourceQuery;
const hashIdx = query.indexOf('#');
if (hashIdx >= 0) {
query = query.substr(0, hashIdx);
}
}
let url = filename;
if (content) {
// Match hash template
url = url
// `hash` and `contenthash` are same in `loader-utils` context
// let's keep `hash` for backward compatibility
.replace(
/\[(?:([^:\]]+):)?(?:hash|contenthash)(?::([a-z]+\d*))?(?::(\d+))?\]/gi,
(all, hashType, digestType, maxLength) =>
getHashDigest(content, hashType, digestType, parseInt(maxLength, 10))
)
.replace(/\[emoji(?::(\d+))?\]/gi, (all, length) =>
encodeStringToEmoji(content, parseInt(length, 10))
);
}
url = url
.replace(/\[ext\]/gi, () => ext)
.replace(/\[name\]/gi, () => basename)
.replace(/\[path\]/gi, () => directory)
.replace(/\[folder\]/gi, () => folder)
.replace(/\[query\]/gi, () => query);
if (regExp && loaderContext.resourcePath) {
const match = loaderContext.resourcePath.match(new RegExp(regExp));
match &&
match.forEach((matched, i) => {
url = url.replace(new RegExp('\\[' + i + '\\]', 'ig'), matched);
});
}
if (
typeof loaderContext.options === 'object' &&
typeof loaderContext.options.customInterpolateName === 'function'
) {
url = loaderContext.options.customInterpolateName.call(
loaderContext,
url,
name,
options
);
}
return url;
}
module.exports = interpolateName;