62 lines
2.1 KiB
JavaScript
62 lines
2.1 KiB
JavaScript
/*
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* Copyright (C) 2015 - present Instructure, Inc.
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*
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* This file is part of Canvas.
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*
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* Canvas is free software: you can redistribute it and/or modify it under
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* the terms of the GNU Affero General Public License as published by the Free
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* Software Foundation, version 3 of the License.
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*
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* Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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* A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Affero General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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// This loader knows how to build a glue module that requires both the original
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// unextended file from canvas, and any extensions from plugins, and builds
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// a chain of calls to apply the extensions. This is a replacement for any
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// place in the app the original file is required.
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function extractFileName(remainingRequest) {
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const loaderedPieces = remainingRequest.split('!')
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const unloaderedRequest = loaderedPieces[loaderedPieces.length - 1]
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return unloaderedRequest.replace(/^.*\/app\/coffeescripts\//, '')
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}
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module.exports = function(source) {
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throw 'Should not ever make it to the actual extensions loader because the pitching function does the work'
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}
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module.exports.pitch = function(remainingRequest, precedingRequest, data) {
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this.cacheable()
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const fileName = extractFileName(remainingRequest)
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const plugins = this.query.replace('?', '').split(',')
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const pluginImports = []
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const pluginArgs = []
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plugins.forEach((plugin, i) => {
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pluginImports.push(`import p${i} from "${plugin}/app/coffeescripts/extensions/${fileName}";`)
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pluginArgs.push(`p${i}`)
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})
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let pluginChain = 'orig'
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let i = pluginArgs.length - 1
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while (i >= 0) {
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const pluginCall = pluginArgs[i]
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pluginChain = `${pluginCall}(${pluginChain})`
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i--
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}
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return `
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import orig from "unextended!coffeescripts/${fileName}";
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${pluginImports.join('\n')}
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export default ${pluginChain};
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`
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}
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