121 lines
4.0 KiB
JavaScript
121 lines
4.0 KiB
JavaScript
// Copyright IBM Corp. 2014,2016. All Rights Reserved.
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// Node module: loopback-boot
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// This file is licensed under the MIT License.
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// License text available at https://opensource.org/licenses/MIT
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var fs = require('fs');
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var path = require('path');
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var commondir = require('commondir');
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var cloneDeep = require('lodash').cloneDeep;
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var g = require('strong-globalize')();
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/**
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* Add boot instructions to a browserify bundler.
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* @param {Object} instructions Boot instructions.
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* @param {Object} bundler A browserify object created by `browserify()`.
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*/
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module.exports = function addInstructionsToBrowserify(instructions, bundler) {
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bundleModelScripts(instructions, bundler);
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bundleMixinScripts(instructions, bundler);
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bundleComponentScripts(instructions, bundler);
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bundleOtherScripts(instructions, bundler);
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bundleInstructions(instructions, bundler);
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};
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function bundleOtherScripts(instructions, bundler) {
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for (var key in instructions.files) {
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addScriptsToBundle(key, instructions.files[key], bundler);
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}
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}
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function bundleModelScripts(instructions, bundler) {
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bundleSourceFiles(instructions, 'models', bundler);
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}
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function bundleMixinScripts(instructions, bundler) {
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bundleSourceFiles(instructions, 'mixins', bundler);
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}
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function bundleComponentScripts(instructions, bundler) {
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bundleSourceFiles(instructions, 'components', bundler);
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}
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function bundleSourceFiles(instructions, type, bundler) {
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var files = instructions[type]
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.map(function(m) { return m.sourceFile; })
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.filter(function(f) { return !!f; });
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var instructionToFileMapping = instructions[type]
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.map(function(m) { return files.indexOf(m.sourceFile); });
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addScriptsToBundle(type, files, bundler);
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// Update `sourceFile` properties with the new paths
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instructionToFileMapping.forEach(function(fileIx, sourceIx) {
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if (fileIx === -1) return;
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instructions[type][sourceIx].sourceFile = files[fileIx];
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});
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}
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function addScriptsToBundle(name, list, bundler) {
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if (!list.length) return;
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var root = commondir(list.map(path.dirname));
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for (var ix in list) {
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var filepath = list[ix];
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// Build a short unique id that does not expose too much
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// information about the file system, but still preserves
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// useful information about where is the file coming from.
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var fileid = 'loopback-boot#' + name + '#' + path.relative(root, filepath);
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// Add the file to the bundle.
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bundler.require(filepath, { expose: fileid });
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// Rewrite the instructions entry with the new id that will be
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// used to load the file via `require(fileid)`.
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list[ix] = fileid;
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}
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}
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function bundleInstructions(instructions, bundler) {
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instructions = cloneDeep(instructions);
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var hasMiddleware = instructions.middleware.phases.length ||
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instructions.middleware.middleware.length;
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if (hasMiddleware) {
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g.warn(
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'Discarding {{middleware}} instructions,' +
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' {{loopback}} client does not support {{middleware}}.');
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}
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delete instructions.middleware;
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var instructionsString = JSON.stringify(instructions, null, 2);
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/* The following code does not work due to a bug in browserify
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* https://github.com/substack/node-browserify/issues/771
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var instructionsStream = require('resumer')()
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.queue(instructionsString);
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instructionsStream.path = 'boot-instructions';
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b.require(instructionsStream, { expose: 'loopback-boot#instructions' });
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*/
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var instructionId = 'instructions';
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// Create an unique instruction identifier using the application ID.
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// This is only useful when multiple loopback applications are being bundled
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// together.
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if (instructions.appId)
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instructionId += '-' + instructions.appId;
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// Write the instructions to a file in our node_modules folder.
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// The location should not really matter as long as it is .gitignore-ed
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var instructionsFile = path.resolve(__dirname,
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'..', 'generated-' + instructionId + '.json');
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fs.writeFileSync(instructionsFile, instructionsString, 'utf-8');
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var moduleName = 'loopback-boot#' + instructionId;
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bundler.require(instructionsFile, { expose: moduleName });
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}
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