79 lines
2.6 KiB
JavaScript
79 lines
2.6 KiB
JavaScript
'use strict';
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var templateSTR = "(function(f){if(typeof exports===\"object\"&&typeof module!==\"undefined\"){module.exports=f()}else if(typeof define===\"function\"&&define.amd){define([],f)}else{var g;if(typeof window!==\"undefined\"){g=window}else if(typeof global!==\"undefined\"){g=global}else if(typeof self!==\"undefined\"){g=self}else{g=this}defineNamespace()}})(function(){source()});\n";
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function template(moduleName, options) {
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if (typeof options === 'boolean') {
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options = {commonJS: options};
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} else if (!options) {
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options = {};
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}
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var str = templateSTR.replace(/defineNamespace\(\)/g, compileNamespace(moduleName))
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.split('source()')
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str[0] = str[0].trim();
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//make sure these are undefined so as to not get confused if modules have inner UMD systems
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str[0] += 'var define,module,exports;';
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if (options.commonJS) str[0] += 'module={exports:(exports={})};';
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str[0] += '\n';
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if (options.commonJS) str[1] = 'return module.exports;' + str[1];
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str[1] = '\n' + str[1];
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return str;
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}
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exports = module.exports = function (name, src, options) {
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if (typeof options === 'string' && typeof src === 'object') {
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var tmp = options;
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options = src;
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src = tmp;
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}
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return exports.prelude(name, options) + src + exports.postlude(name, options);
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};
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exports.prelude = function (moduleName, options) {
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return template(moduleName, options)[0];
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};
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exports.postlude = function (moduleName, options) {
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return template(moduleName, options)[1];
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};
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function camelCase(name) {
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name = name.replace(/\-([a-z])/g, function (_, char) { return char.toUpperCase(); });
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if (!/^[a-zA-Z_$]$/.test(name[0])) {
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name = name.substr(1);
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}
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var result = name.replace(/[^\w$]+/g, '')
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if (!result) {
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throw new Error('Invalid JavaScript identifier resulted from camel-casing');
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}
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return result
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}
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function compileNamespace(name) {
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var names = name.split('.')
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// No namespaces, yield the best case 'global.NAME = VALUE'
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if (names.length === 1) {
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return 'g.' + camelCase(name) + ' = f()';
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// Acceptable case, with reasonable compilation
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} else if (names.length === 2) {
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names = names.map(camelCase);
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return '(g.' + names[0] + ' || (g.' + names[0] + ' = {})).' + names[1] + ' = f()';
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// Worst case, too many namespaces to care about
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} else {
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var valueContainer = names.pop()
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return names.map(compileNamespaceStep)
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.concat(['g.' + camelCase(valueContainer) + ' = f()'])
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.join(';');
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}
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}
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function compileNamespaceStep(name) {
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name = camelCase(name);
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return 'g=(g.' + name + '||(g.' + name + ' = {}))';
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}
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