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This commit is contained in:
Brian Ng
2017-06-27 12:15:00 -05:00
parent 93cc22dae1
commit e4b35f680d
307 changed files with 6742 additions and 4080 deletions
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182
packages/babel-plugin-transform-es2015-modules-commonjs/src/index.js
View File

@@ -42,10 +42,15 @@ const buildExportAll = template(`
});
`);
const THIS_BREAK_KEYS = ["FunctionExpression", "FunctionDeclaration", "ClassProperty",
"ClassMethod", "ObjectMethod"];
const THIS_BREAK_KEYS = [
"FunctionExpression",
"FunctionDeclaration",
"ClassProperty",
"ClassMethod",
"ObjectMethod",
];
export default function () {
export default function() {
const REASSIGN_REMAP_SKIP = Symbol();
const reassignmentVisitor = {
@@ -61,8 +66,12 @@ export default function () {
path.replaceWith(t.sequenceExpression([t.numericLiteral(0), remap]));
} else if (path.isJSXIdentifier() && t.isMemberExpression(remap)) {
const { object, property } = remap;
path.replaceWith(t.JSXMemberExpression(t.JSXIdentifier(object.name),
t.JSXIdentifier(property.name)));
path.replaceWith(
t.JSXMemberExpression(
t.JSXIdentifier(object.name),
t.JSXIdentifier(property.name),
),
);
} else {
path.replaceWith(remap);
}
@@ -104,9 +113,17 @@ export default function () {
// redeclared in this scope
if (this.scope.getBinding(name) !== path.scope.getBinding(name)) return;
const node = t.assignmentExpression(path.node.operator[0] + "=", arg.node, t.numericLiteral(1));
const node = t.assignmentExpression(
path.node.operator[0] + "=",
arg.node,
t.numericLiteral(1),
);
if ((path.parentPath.isExpressionStatement() && !path.isCompletionRecord()) || path.node.prefix) {
if (
(path.parentPath.isExpressionStatement() &&
!path.isCompletionRecord()) ||
path.node.prefix
) {
path.replaceWith(node);
this.requeueInParent(path);
return;
@@ -118,7 +135,8 @@ export default function () {
let operator;
if (path.node.operator === "--") {
operator = "+";
} else { // "++"
} else {
// "++"
operator = "-";
}
nodes.push(t.binaryExpression(operator, arg.node, t.numericLiteral(1)));
@@ -139,7 +157,7 @@ export default function () {
if (
state.opts.allowTopLevelThis !== true &&
!path.findParent((path) => THIS_BREAK_KEYS.indexOf(path.type) >= 0)
!path.findParent(path => THIS_BREAK_KEYS.indexOf(path.type) >= 0)
) {
path.replaceWith(t.identifier("undefined"));
}
@@ -177,12 +195,15 @@ export default function () {
const cached = requires[source];
if (cached) return cached;
const ref = path.scope.generateUidIdentifier(basename(source, extname(source)));
const ref = path.scope.generateUidIdentifier(
basename(source, extname(source)),
);
const varDecl = t.variableDeclaration("var", [
t.variableDeclarator(ref, buildRequire(
t.stringLiteral(source)
).expression),
t.variableDeclarator(
ref,
buildRequire(t.stringLiteral(source)).expression,
),
]);
// Copy location from the original import statement for sourcemap
@@ -197,7 +218,7 @@ export default function () {
topNodes.push(varDecl);
return requires[source] = ref;
return (requires[source] = ref);
}
function addTo(obj, key, arr) {
@@ -209,11 +230,16 @@ export default function () {
if (path.isExportDeclaration()) {
hasExports = true;
const specifiers = [].concat(path.get("declaration"), path.get("specifiers"));
const specifiers = [].concat(
path.get("declaration"),
path.get("specifiers"),
);
for (const specifier of specifiers) {
const ids = specifier.getBindingIdentifiers();
if (ids.__esModule) {
throw specifier.buildCodeFrameError("Illegal export \"__esModule\"");
throw specifier.buildCodeFrameError(
'Illegal export "__esModule"',
);
}
}
}
@@ -233,7 +259,7 @@ export default function () {
if (typeof path.node._blockHoist === "number") {
importsEntry.maxBlockHoist = Math.max(
path.node._blockHoist,
importsEntry.maxBlockHoist
importsEntry.maxBlockHoist,
);
}
@@ -250,7 +276,12 @@ export default function () {
topNodes.push(buildExportsAssignment(defNode, id));
path.replaceWith(declaration.node);
} else {
topNodes.push(buildExportsAssignment(defNode, t.toExpression(declaration.node)));
topNodes.push(
buildExportsAssignment(
defNode,
t.toExpression(declaration.node),
),
);
path.remove();
}
} else if (declaration.isClassDeclaration()) {
@@ -263,7 +294,12 @@ export default function () {
buildExportsAssignment(defNode, id),
]);
} else {
path.replaceWith(buildExportsAssignment(defNode, t.toExpression(declaration.node)));
path.replaceWith(
buildExportsAssignment(
defNode,
t.toExpression(declaration.node),
),
);
// Manualy re-queue `export default class {}` expressions so that the ES3 transform
// has an opportunity to convert them. Ideally this would happen automatically from the
@@ -271,7 +307,12 @@ export default function () {
path.parentPath.requeue(path.get("expression.left"));
}
} else {
path.replaceWith(buildExportsAssignment(t.identifier("default"), declaration.node));
path.replaceWith(
buildExportsAssignment(
t.identifier("default"),
declaration.node,
),
);
// Manualy re-queue `export default foo;` expressions so that the ES3 transform
// has an opportunity to convert them. Ideally this would happen automatically from the
@@ -306,7 +347,9 @@ export default function () {
if (id.isIdentifier()) {
addTo(exports, id.node.name, id.node);
init.replaceWith(buildExportsAssignment(id.node, init.node).expression);
init.replaceWith(
buildExportsAssignment(id.node, init.node).expression,
);
nonHoistedExportNames[id.node.name] = true;
} else if (id.isObjectPattern()) {
for (let i = 0; i < id.node.properties.length; i++) {
@@ -318,7 +361,9 @@ export default function () {
propValue = prop.argument;
}
addTo(exports, propValue.name, propValue);
exportsToInsert.push(buildExportsAssignment(propValue, propValue));
exportsToInsert.push(
buildExportsAssignment(propValue, propValue),
);
nonHoistedExportNames[propValue.name] = true;
}
} else if (id.isArrayPattern() && id.node.elements) {
@@ -332,7 +377,9 @@ export default function () {
}
const name = elem.name;
addTo(exports, name, elem);
exportsToInsert.push(buildExportsAssignment(elem, elem));
exportsToInsert.push(
buildExportsAssignment(elem, elem),
);
nonHoistedExportNames[name] = true;
}
}
@@ -356,15 +403,25 @@ export default function () {
// todo
} else if (specifier.isExportSpecifier()) {
if (!noInterop && specifier.node.local.name === "default") {
topNodes.push(buildExportsFrom(t.stringLiteral(specifier.node.exported.name),
t.memberExpression(
t.callExpression(this.addHelper("interopRequireDefault"), [ref]),
specifier.node.local
)
));
topNodes.push(
buildExportsFrom(
t.stringLiteral(specifier.node.exported.name),
t.memberExpression(
t.callExpression(
this.addHelper("interopRequireDefault"),
[ref],
),
specifier.node.local,
),
),
);
} else {
topNodes.push(buildExportsFrom(t.stringLiteral(specifier.node.exported.name),
t.memberExpression(ref, specifier.node.local)));
topNodes.push(
buildExportsFrom(
t.stringLiteral(specifier.node.exported.name),
t.memberExpression(ref, specifier.node.local),
),
);
}
nonHoistedExportNames[specifier.node.exported.name] = true;
}
@@ -372,16 +429,28 @@ export default function () {
} else {
for (const specifier of specifiers) {
if (specifier.isExportSpecifier()) {
addTo(exports, specifier.node.local.name, specifier.node.exported);
addTo(
exports,
specifier.node.local.name,
specifier.node.exported,
);
nonHoistedExportNames[specifier.node.exported.name] = true;
nodes.push(buildExportsAssignment(specifier.node.exported, specifier.node.local));
nodes.push(
buildExportsAssignment(
specifier.node.exported,
specifier.node.local,
),
);
}
}
}
path.replaceWithMultiple(nodes);
} else if (path.isExportAllDeclaration()) {
const exportNode = buildExportAll({
OBJECT: addRequire(path.node.source.value, path.node._blockHoist),
OBJECT: addRequire(
path.node.source.value,
path.node._blockHoist,
),
});
exportNode.loc = path.node.loc;
topNodes.push(exportNode);
@@ -407,8 +476,8 @@ export default function () {
specifier.local,
t.callExpression(
this.addHelper("interopRequireWildcard"),
[uid]
)
[uid],
),
),
]);
@@ -420,7 +489,10 @@ export default function () {
}
wildcard = specifier.local;
} else if (t.isImportDefaultSpecifier(specifier)) {
specifiers[i] = t.importSpecifier(specifier.local, t.identifier("default"));
specifiers[i] = t.importSpecifier(
specifier.local,
t.identifier("default"),
);
}
}
@@ -431,14 +503,16 @@ export default function () {
if (wildcard) {
target = wildcard;
} else if (!noInterop) {
target = wildcard = path.scope.generateUidIdentifier(uid.name);
target = wildcard = path.scope.generateUidIdentifier(
uid.name,
);
const varDecl = t.variableDeclaration("var", [
t.variableDeclarator(
target,
t.callExpression(
this.addHelper("interopRequireDefault"),
[uid]
)
[uid],
),
),
]);
@@ -449,8 +523,10 @@ export default function () {
topNodes.push(varDecl);
}
}
remaps[specifier.local.name] = t.memberExpression(target,
t.cloneWithoutLoc(specifier.imported));
remaps[specifier.local.name] = t.memberExpression(
target,
t.cloneWithoutLoc(specifier.imported),
);
}
}
} else {
@@ -462,25 +538,29 @@ export default function () {
}
if (hasImports && Object.keys(nonHoistedExportNames).length) {
// avoid creating too long of export assignment to prevent stack overflow
const maxHoistedExportsNodeAssignmentLength = 100;
const nonHoistedExportNamesArr = Object.keys(nonHoistedExportNames);
for (
let currentExportsNodeAssignmentLength = 0;
currentExportsNodeAssignmentLength < nonHoistedExportNamesArr.length;
currentExportsNodeAssignmentLength <
nonHoistedExportNamesArr.length;
currentExportsNodeAssignmentLength += maxHoistedExportsNodeAssignmentLength
) {
const nonHoistedExportNamesChunk = nonHoistedExportNamesArr.slice(
currentExportsNodeAssignmentLength,
currentExportsNodeAssignmentLength + maxHoistedExportsNodeAssignmentLength);
currentExportsNodeAssignmentLength +
maxHoistedExportsNodeAssignmentLength,
);
let hoistedExportsNode = t.identifier("undefined");
nonHoistedExportNamesChunk.forEach(function (name) {
hoistedExportsNode = buildExportsAssignment(t.identifier(name), hoistedExportsNode)
.expression;
nonHoistedExportNamesChunk.forEach(function(name) {
hoistedExportsNode = buildExportsAssignment(
t.identifier(name),
hoistedExportsNode,
).expression;
});
const node = t.expressionStatement(hoistedExportsNode);
@@ -493,7 +573,9 @@ export default function () {
// add __esModule declaration if this file has any exports
if (hasExports && !strict) {
let buildTemplate = buildExportsModuleDeclaration;
if (this.opts.loose) buildTemplate = buildLooseExportsModuleDeclaration;
if (this.opts.loose) {
buildTemplate = buildLooseExportsModuleDeclaration;
}
const declar = buildTemplate();
declar._blockHoist = 3;
@@ -506,7 +588,7 @@ export default function () {
remaps,
scope,
exports,
requeueInParent: (newPath) => path.requeue(newPath),
requeueInParent: newPath => path.requeue(newPath),
});
},
},

14
packages/babel-plugin-transform-es2015-modules-commonjs/test/esmodule-flag.js
View File

@@ -2,8 +2,8 @@ const assert = require("assert");
const babel = require("babel-core");
const vm = require("vm");
test("Re-export doesn't overwrite __esModule flag", function () {
let code = "export * from \"./dep\";";
test("Re-export doesn't overwrite __esModule flag", function() {
let code = 'export * from "./dep";';
const depStub = {
__esModule: false,
};
@@ -12,7 +12,7 @@ test("Re-export doesn't overwrite __esModule flag", function () {
module: {
exports: {},
},
require: function (id) {
require: function(id) {
if (id === "./dep") return depStub;
return require(id);
},
@@ -20,10 +20,8 @@ test("Re-export doesn't overwrite __esModule flag", function () {
context.exports = context.module.exports;
code = babel.transform(code, {
"plugins": [
[require("../"), { loose: true }],
],
"ast": false,
plugins: [[require("../"), { loose: true }]],
ast: false,
}).code;
vm.runInNewContext(code, context);
@@ -32,6 +30,6 @@ test("Re-export doesn't overwrite __esModule flag", function () {
assert.equal(
context.exports.__esModule,
true,
"Expected exports.__esModule === true"
"Expected exports.__esModule === true",
);
});