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Replace copyright headers; changes UMD to CommonJS.

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This commit is contained in:
Yury Delendik 2017-02-08 16:35:58 -06:00
parent eb4c88cd44
commit a048519fa1
5 changed files with 116 additions and 1 deletions
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80
external/builder/preprocessor2.js vendored
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@ -201,6 +201,86 @@ function postprocessNode(ctx, node) {
block.body.pop();
}
break;
case 'Program':
// Checking for a function closure that looks like UMD header.
node.body.some(function (item, index) {
// Is it `(function (root, factory) { ? }(this, function (?) {?}));` ?
if (item.type !== 'ExpressionStatement' ||
item.expression.type !== 'CallExpression' ||
item.expression.callee.type !== 'FunctionExpression' ||
item.expression.callee.params.length !== 2 ||
item.expression.arguments.length !== 2 ||
item.expression.arguments[0].type !== 'ThisExpression' ||
item.expression.arguments[1].type !== 'FunctionExpression') {
return false;
}
var init = item.expression.callee;
// Is init body looks like
// `if (?) { ? } else if (typeof exports !== 'undefined') { ? } ...`?
if (init.body.type !== 'BlockStatement' ||
init.body.body.length !== 1 ||
init.body.body[0].type !== 'IfStatement') {
return false;
}
var initIf = init.body.body[0];
if (initIf.alternate.type !== 'IfStatement' ||
initIf.alternate.test.type !== 'BinaryExpression' ||
initIf.alternate.test.operator !== '!==' ||
initIf.alternate.test.left.type !== 'UnaryExpression' ||
initIf.alternate.test.left.operator !== 'typeof' ||
initIf.alternate.test.left.argument.type !== 'Identifier' ||
initIf.alternate.test.left.argument.name !== 'exports' ||
initIf.alternate.test.right.type !== 'Literal' ||
initIf.alternate.test.right.value !== 'undefined' ||
initIf.alternate.consequent.type !== 'BlockStatement') {
return false;
}
var commonJsInit = initIf.alternate.consequent;
// Is commonJsInit `factory(exports, ...)` ?
if (commonJsInit.body.length !== 1 ||
commonJsInit.body[0].type !== 'ExpressionStatement' ||
commonJsInit.body[0].expression.type !== 'CallExpression' ||
commonJsInit.body[0].expression.callee.type !== 'Identifier') {
return false;
}
var commonJsInitArgs = commonJsInit.body[0].expression.arguments;
if (commonJsInitArgs.length === 0 ||
commonJsInitArgs[0].type !== 'Identifier' ||
commonJsInitArgs[0].name !== 'exports') {
return false;
}
var factory = item.expression.arguments[1];
// Is factory `function (exports, ....) { ? }` ?
if (factory.params.length === 0 ||
factory.params[0].type !== 'Identifier' ||
factory.params[0].name !== 'exports' ||
factory.body.type !== 'BlockStatement') {
return true;
}
var factoryParams = factory.params;
var factoryBody = factory.body;
// Remove closure and function and replacing parameters with vars.
node.body.splice(index, 1);
for (var i = 1, ii = factoryParams.length; i < ii; i++) {
var varNode = {
type: 'VariableDeclaration',
'declarations': [{
type: 'VariableDeclarator',
id: factoryParams[i],
init: commonJsInitArgs[i] || null,
loc: factoryParams[i].loc
}],
kind: 'var'
};
node.body.splice(index++, 0, varNode);
}
factoryBody.body.forEach(function (item) {
node.body.splice(index++, 0, item);
});
return true;
});
break;
}
return node;
}