mirror of https://github.com/jkjoy/sunpeiwen.git
64 lines
2.3 KiB
JavaScript
64 lines
2.3 KiB
JavaScript
var fs = require('fs')
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var path = require('path')
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/**
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* Loads templates from the file system.
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* @alias swig.loaders.fs
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* @example
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* swig.setDefaults({ loader: swig.loaders.fs() });
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* @example
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* // Load Templates from a specific directory (does not require using relative paths in your templates)
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* swig.setDefaults({ loader: swig.loaders.fs(__dirname + '/templates' )});
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* @param {string} [basepath=''] Path to the templates as string. Assigning this value allows you to use semi-absolute paths to templates instead of relative paths.
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* @param {string} [encoding='utf8'] Template encoding
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*/
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module.exports = function (basepath, encoding) {
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var ret = {}
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encoding = encoding || 'utf8'
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basepath = basepath ? path.resolve(basepath) : null
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/**
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* Resolves <var>to</var> to an absolute path or unique identifier. This is used for building correct, normalized, and absolute paths to a given template.
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* @alias resolve
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* @param {string} to Non-absolute identifier or pathname to a file.
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* @param {string} [from] If given, should attempt to find the <var>to</var> path in relation to this given, known path.
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* @return {string}
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*/
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ret.resolve = function (to, from) {
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if (basepath) {
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from = basepath
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} else {
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from = from ? path.dirname(from) : process.cwd()
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}
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return path.resolve(from, to)
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}
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/**
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* Loads a single template. Given a unique <var>identifier</var> found by the <var>resolve</var> method this should return the given template.
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* @alias load
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* @param {string} identifier Unique identifier of a template (possibly an absolute path).
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* @param {function} [cb] Asynchronous callback function. If not provided, this method should run synchronously.
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* @return {string} Template source string.
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*/
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ret.load = function (identifier, cb) {
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if (!fs || (cb && !fs.readFile) || !fs.readFileSync) {
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throw new Error(
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'Unable to find file ' +
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identifier +
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' because there is no filesystem to read from.'
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)
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}
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identifier = ret.resolve(identifier)
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if (cb) {
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fs.readFile(identifier, encoding, cb)
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return
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}
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return fs.readFileSync(identifier, encoding)
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}
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return ret
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}
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