1 |
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4 |
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5 | "use strict";
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6 | const createHash = require("./util/createHash");
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7 |
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8 | const validateOptions = require("schema-utils");
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9 | const schema = require("../schemas/plugins/HashedModuleIdsPlugin.json");
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10 |
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11 |
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12 |
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13 | class HashedModuleIdsPlugin {
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14 | |
15 |
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16 |
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17 | constructor(options) {
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18 | if (!options) options = {};
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19 |
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20 | validateOptions(schema, options, "Hashed Module Ids Plugin");
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21 |
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22 |
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23 | this.options = Object.assign(
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24 | {
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25 | context: null,
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26 | hashFunction: "md4",
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27 | hashDigest: "base64",
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28 | hashDigestLength: 4
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29 | },
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30 | options
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31 | );
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32 | }
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33 |
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34 | apply(compiler) {
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35 | const options = this.options;
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36 | compiler.hooks.compilation.tap("HashedModuleIdsPlugin", compilation => {
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37 | const usedIds = new Set();
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38 | compilation.hooks.beforeModuleIds.tap(
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39 | "HashedModuleIdsPlugin",
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40 | modules => {
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41 | for (const module of modules) {
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42 | if (module.id === null && module.libIdent) {
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43 | const id = module.libIdent({
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44 | context: this.options.context || compiler.options.context
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45 | });
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46 | const hash = createHash(options.hashFunction);
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47 | hash.update(id);
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48 | const hashId = (hash.digest(
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49 | options.hashDigest
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50 | ));
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51 | let len = options.hashDigestLength;
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52 | while (usedIds.has(hashId.substr(0, len))) len++;
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53 | module.id = hashId.substr(0, len);
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54 | usedIds.add(module.id);
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55 | }
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56 | }
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57 | }
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58 | );
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59 | });
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60 | }
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61 | }
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62 |
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63 | module.exports = HashedModuleIdsPlugin;
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