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main.js
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89 lines (77 loc) · 2.49 KB
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'use strict';
var visitors = require('./vendor/fbtransform/visitors');
var transform = require('jstransform').transform;
var typesSyntax = require('jstransform/visitors/type-syntax');
var Buffer = require('buffer').Buffer;
var visitReactTag = require('./vendor/fbtransform/transforms/react').visitorList[0];
var slice = Array.prototype.slice;
function partial(func) {
var partialArgs = slice.call(arguments, 1);
return function() {
return func.apply(this, partialArgs.concat(slice.call(arguments)));
};
}
function extend(dest, src) {
if (src != null) {
Object.keys(src).forEach(function(prop) {
dest[prop] = src[prop];
});
}
return dest;
}
module.exports = {
transform: function(input, options) {
var output = innerTransform(input, options);
var result = output.code;
if (options && options.sourceMap) {
var map = inlineSourceMap(
output.sourceMap,
input,
options.sourceFilename
);
result += '\n' + map;
}
return result;
},
transformWithDetails: function(input, options) {
var output = innerTransform(input, options);
var result = {};
result.code = output.code;
if (options && options.sourceMap) {
result.sourceMap = output.sourceMap.toJSON();
}
return result;
}
};
function innerTransform(input, options) {
options = extend({precompile: true}, options);
var visitorSets = ['react'];
if (options.harmony) {
visitorSets.push('harmony');
}
if (options.stripTypes) {
// Stripping types needs to happen before the other transforms
// unfortunately, due to bad interactions. For example,
// es6-rest-param-visitors conflict with stripping rest param type
// annotation
input = transform(typesSyntax.visitorList, input, options).code;
}
var visitorList = visitors.getVisitorsBySet(visitorSets);
// Patch the react tag visitor to preconfigure the MSX precompile argument
for (var i = 0; i < visitorList.length ; i++) {
var visitor = visitorList[i];
if (visitor === visitReactTag) {
visitorList[i] = partial(visitor, options.precompile);
visitorList[i].test = visitor.test;
}
}
return transform(visitorList, input, options);
}
function inlineSourceMap(sourceMap, sourceCode, sourceFilename) {
var json = sourceMap.toJSON();
json.sources = [sourceFilename];
json.sourcesContent = [sourceCode];
var base64 = Buffer(JSON.stringify(json)).toString('base64');
return '//# sourceMappingURL=data:application/json;base64,' +
base64;
}