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contexts from './contexts';\nimport Parser from './parser/parser';\nimport LessError from './less-error';\nimport * as utils from './utils';\nimport logger from './logger';\n\nexport default function(environment) {\n // FileInfo = {\n // 'rewriteUrls' - option - whether to adjust URL's to be relative\n // 'filename' - full resolved filename of current file\n // 'rootpath' - path to append to normal URLs for this node\n // 'currentDirectory' - path to the current file, absolute\n // 'rootFilename' - filename of the base file\n // 'entryPath' - absolute path to the entry file\n // 'reference' - whether the file should not be output and only output parts that are referenced\n\n class ImportManager {\n constructor(less, context, rootFileInfo) {\n this.less = less;\n this.rootFilename = rootFileInfo.filename;\n this.paths = context.paths || []; // Search paths, when importing\n this.contents = {}; // map - filename to contents of all the files\n this.contentsIgnoredChars = {}; // map - filename to lines at the beginning of each file to ignore\n this.mime = context.mime;\n this.error = null;\n this.context = context;\n // Deprecated? Unused outside of here, could be useful.\n this.queue = []; // Files which haven't been imported yet\n this.files = {}; // Holds the imported parse trees.\n }\n\n /**\n * Add an import to be imported\n * @param path - the raw path\n * @param tryAppendExtension - whether to try appending a file extension (.less or .js if the path has no extension)\n * @param currentFileInfo - the current file info (used for instance to work out relative paths)\n * @param importOptions - import options\n * @param callback - callback for when it is imported\n */\n push(path, tryAppendExtension, currentFileInfo, importOptions, callback) {\n const importManager = this, pluginLoader = this.context.pluginManager.Loader;\n\n this.queue.push(path);\n\n const fileParsedFunc = function (e, root, fullPath) {\n importManager.queue.splice(importManager.queue.indexOf(path), 1); // Remove the path from the queue\n\n const importedEqualsRoot = fullPath === importManager.rootFilename;\n if (importOptions.optional && e) {\n callback(null, {rules:[]}, false, null);\n logger.info(`The file ${fullPath} was skipped because it was not found and the import was marked optional.`);\n }\n else {\n // Inline imports aren't cached here.\n // If we start to cache them, please make sure they won't conflict with non-inline imports of the\n // same name as they used to do before this comment and the condition below have been added.\n if (!importManager.files[fullPath] && !importOptions.inline) {\n importManager.files[fullPath] = { root, options: importOptions };\n }\n if (e && !importManager.error) { importManager.error = e; }\n callback(e, root, importedEqualsRoot, fullPath);\n }\n };\n\n const newFileInfo = {\n rewriteUrls: this.context.rewriteUrls,\n entryPath: currentFileInfo.entryPath,\n rootpath: currentFileInfo.rootpath,\n rootFilename: currentFileInfo.rootFilename\n };\n\n const fileManager = environment.getFileManager(path, currentFileInfo.currentDirectory, this.context, environment);\n\n if (!fileManager) {\n fileParsedFunc({ message: `Could not find a file-manager for ${path}` });\n return;\n }\n\n const loadFileCallback = function(loadedFile) {\n let plugin;\n const resolvedFilename = loadedFile.filename;\n const contents = loadedFile.contents.replace(/^\\uFEFF/, '');\n\n // Pass on an updated rootpath if path of imported file is relative and file\n // is in a (sub|sup) directory\n //\n // Examples:\n // - If path of imported file is 'module/nav/nav.less' and rootpath is 'less/',\n // then rootpath should become 'less/module/nav/'\n // - If path of imported file is '../mixins.less' and rootpath is 'less/',\n // then rootpath should become 'less/../'\n newFileInfo.currentDirectory = fileManager.getPath(resolvedFilename);\n if (newFileInfo.rewriteUrls) {\n newFileInfo.rootpath = fileManager.join(\n (importManager.context.rootpath || ''),\n fileManager.pathDiff(newFileInfo.currentDirectory, newFileInfo.entryPath));\n\n if (!fileManager.isPathAbsolute(newFileInfo.rootpath) && fileManager.alwaysMakePathsAbsolute()) {\n newFileInfo.rootpath = fileManager.join(newFileInfo.entryPath, newFileInfo.rootpath);\n }\n }\n newFileInfo.filename = resolvedFilename;\n\n const newEnv = new contexts.Parse(importManager.context);\n\n newEnv.processImports = false;\n importManager.contents[resolvedFilename] = contents;\n\n if (currentFileInfo.reference || importOptions.reference) {\n newFileInfo.reference = true;\n }\n\n if (importOptions.isPlugin) {\n plugin = pluginLoader.evalPlugin(contents, newEnv, importManager, importOptions.pluginArgs, newFileInfo);\n if (plugin instanceof LessError) {\n fileParsedFunc(plugin, null, resolvedFilename);\n }\n else {\n fileParsedFunc(null, plugin, resolvedFilename);\n }\n } else if (importOptions.inline) {\n fileParsedFunc(null, contents, resolvedFilename);\n } else {\n // import (multiple) parse trees apparently get altered and can't be cached.\n // TODO: investigate why this is\n if (importManager.files[resolvedFilename]\n && !importManager.files[resolvedFilename].options.multiple\n && !importOptions.multiple) {\n\n fileParsedFunc(null, importManager.files[resolvedFilename].root, resolvedFilename);\n }\n else {\n new Parser(newEnv, importManager, newFileInfo).parse(contents, function (e, root) {\n fileParsedFunc(e, root, resolvedFilename);\n });\n }\n }\n };\n let loadedFile;\n let promise;\n const context = utils.clone(this.context);\n\n if (tryAppendExtension) {\n context.ext = importOptions.isPlugin ? '.js' : '.less';\n }\n\n if (importOptions.isPlugin) {\n context.mime = 'application/javascript';\n\n if (context.syncImport) {\n loadedFile = pluginLoader.loadPluginSync(path, currentFileInfo.currentDirectory, context, environment, fileManager);\n } else {\n promise = pluginLoader.loadPlugin(path, currentFileInfo.currentDirectory, context, environment, fileManager);\n }\n }\n else {\n if (context.syncImport) {\n loadedFile = fileManager.loadFileSync(path, currentFileInfo.currentDirectory, context, environment);\n } else {\n promise = fileManager.loadFile(path, currentFileInfo.currentDirectory, context, environment,\n (err, loadedFile) => {\n if (err) {\n fileParsedFunc(err);\n } else {\n loadFileCallback(loadedFile);\n }\n });\n }\n }\n if (loadedFile) {\n if (!loadedFile.filename) {\n fileParsedFunc(loadedFile);\n } else {\n loadFileCallback(loadedFile);\n }\n } else if (promise) {\n promise.then(loadFileCallback, fileParsedFunc);\n }\n }\n }\n\n return ImportManager;\n};\n"]} |