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67 lines
2.2 KiB
67 lines
2.2 KiB
4 years ago
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var path = require('path')
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var _ = require('lodash')
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var byMatcher = require('./db-generated/by-matcher.js')
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/**
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* Determine the index of a language specifiation in the languages-array.
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* @param filename
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* @returns {*}
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*/
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var langIndex = function (filename) {
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// Look for whole filename and for extension ("Makefile" is not an extesion,
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// but should be matched to the appropriate language)
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var index = byMatcher[filename]
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if (_.isUndefined(index)) {
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index = byMatcher[path.extname(filename)]
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}
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if (_.isUndefined(index)) {
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throw new Error("Cannot find language definition for '" + filename + "'")
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}
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return index
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}
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/**
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* Load the comment-pattern for a given file.
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* The file-language is determined by the file-extension.
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* @param {string} `filename` the name of the file
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* @returns {object} the comment-patterns
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* @api public
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*/
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function commentPattern (filename) {
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var base = require('./db-generated/base.js')
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var clone = _.cloneDeep(base[langIndex(filename)])
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delete clone.srcFile
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return clone
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}
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/**
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* Load the comment-regex for a given file.
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* The result contains a regex that matches the comments
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* in the specification. It also has information about
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* which the different capturing groups of an object.
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*
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* @param {string} `filename` the name of the file
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* @returns {object} an object containing regular expressions and capturing-group metadata,
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* see usage example for details
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* @api public
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* @name commentPattern.regex
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*/
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commentPattern.regex = function commentRegex (filename) {
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var regex = require('./db-generated/regexes.js')
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return _.cloneDeep(regex[langIndex(filename)])
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}
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/**
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* Returns the code-context detector for a given filename
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* (based on the name or the file-extension
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* @param {string} filename the name of the file that will be evaluated.
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* @return {function(string,number)} a function that detects the code-context
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* based on a line of code (and a line-number)
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*/
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commentPattern.codeContext = function codeContext (filename) {
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var base = require('./db-generated/base.js')
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var langFile = base[langIndex(filename)].srcFile
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return require('./languages/code-context/' + langFile)
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}
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module.exports = commentPattern
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