1 | /*
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2 | Copyright 2018 Google LLC
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3 |
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4 | Use of this source code is governed by an MIT-style
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5 | license that can be found in the LICENSE file or at
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6 | https://opensource.org/licenses/MIT.
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7 | */
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8 |
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9 | const fse = require('fs-extra');
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10 | const path = require('path');
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11 | const errors = require('./errors');
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12 |
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13 |
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14 | // Used to filter the libraries to copy based on our package.json dependencies.
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15 | const WORKBOX_PREFIX = 'workbox-';
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16 |
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17 | /**
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18 | * This copies over a set of runtime libraries used by Workbox into a
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19 | * local directory, which should be deployed alongside your service worker file.
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20 | *
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21 | * As an alternative to deploying these local copies, you could instead use
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22 | * Workbox from its official CDN URL.
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23 | *
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24 | * This method is exposed for the benefit of developers using
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25 | * [injectManifest()]{@link module:workbox-build.injectManifest} who would
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26 | * prefer not to use the CDN copies of Workbox. Developers using
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27 | * [generateSW()]{@link module:workbox-build.generateSW} don't need to
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28 | * explicitly call this method, as it's called automatically when
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29 | * `importWorkboxFrom` is set to `local`.
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30 | *
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31 | * @param {string} destDirectory The path to the parent directory under which
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32 | * the new directory of libraries will be created.
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33 | * @return {Promise<string>} The name of the newly created directory.
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34 | *
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35 | * @alias module:workbox-build.copyWorkboxLibraries
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36 | */
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37 | module.exports = async (destDirectory) => {
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38 | const thisPkg = require('../../package.json');
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39 | // Use the version string from workbox-build in the name of the parent
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40 | // directory. This should be safe, because lerna will bump workbox-build's
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41 | // pkg.version whenever one of the dependent libraries gets bumped, and we
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42 | // care about versioning the dependent libraries.
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43 | const workboxDirectoryName = `workbox-v${thisPkg.version}`;
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44 | const workboxDirectoryPath = path.join(destDirectory, workboxDirectoryName);
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45 | await fse.ensureDir(workboxDirectoryPath);
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46 |
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47 | const copyPromises = [];
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48 | const librariesToCopy = Object.keys(thisPkg.dependencies).filter(
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49 | (dependency) => dependency.startsWith(WORKBOX_PREFIX));
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50 | for (const library of librariesToCopy) {
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51 | const mainFilePath = require.resolve(library);
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52 | const srcPath = path.dirname(mainFilePath);
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53 |
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54 | // fse.copy() copies all the files in a directory, not the directory itself.
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55 | // See https://github.com/jprichardson/node-fs-extra/blob/master/docs/copy.md#copysrc-dest-options-callback
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56 | copyPromises.push(fse.copy(srcPath, workboxDirectoryPath));
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57 | }
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58 |
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59 | try {
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60 | await Promise.all(copyPromises);
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61 | return workboxDirectoryName;
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62 | } catch (error) {
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63 | throw Error(`${errors['unable-to-copy-workbox-libraries']} ${error}`);
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64 | }
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65 | };
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