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Complete export transform split (#6139)

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They were each transforming the other's syntax (including namespace
transform would transform default, too, and vice-versa).
This commit is contained in:
Justin Ridgewell
2017-08-21 14:15:40 -04:00
committed by Henry Zhu
parent 9e4e64dac9
commit 7e726a81e6
10 changed files with 50 additions and 59 deletions
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48
packages/babel-plugin-transform-export-namespace/src/index.js
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@@ -1,44 +1,38 @@
import syntaxExportExtensions from "babel-plugin-syntax-export-extensions";
export default function({ types: t }) {
function build(node, nodes, scope) {
const hasNoExportNs = node.specifiers.every(
specifier => !t.isExportNamespaceSpecifier(specifier),
);
if (hasNoExportNs) return;
const specifier = node.specifiers.shift();
const uid = scope.generateUidIdentifier(specifier.exported.name);
let newSpecifier;
if (t.isExportNamespaceSpecifier(specifier)) {
newSpecifier = t.importNamespaceSpecifier(uid);
} else {
newSpecifier = t.importDefaultSpecifier(uid);
}
nodes.push(t.importDeclaration([newSpecifier], node.source));
nodes.push(
t.exportNamedDeclaration(null, [
t.exportSpecifier(uid, specifier.exported),
]),
);
build(node, nodes, scope);
}
return {
inherits: syntaxExportExtensions,
visitor: {
ExportNamedDeclaration(path) {
const { node, scope } = path;
const { specifiers } = node;
const index = t.isExportDefaultSpecifier(specifiers[0]) ? 1 : 0;
if (!t.isExportNamespaceSpecifier(specifiers[index])) return;
const nodes = [];
build(node, nodes, scope);
if (!nodes.length) return;
if (index === 1) {
nodes.push(
t.exportNamedDeclaration(null, [specifiers.shift()], node.source),
);
}
const specifier = specifiers.shift();
const { exported } = specifier;
const uid = scope.generateUidIdentifier(exported.name);
nodes.push(
t.importDeclaration([t.importNamespaceSpecifier(uid)], node.source),
t.exportNamedDeclaration(null, [t.exportSpecifier(uid, exported)]),
);
if (node.specifiers.length >= 1) {
nodes.push(node);
}
path.replaceWithMultiple(nodes);
},
},

1
packages/babel-plugin-transform-export-namespace/test/fixtures/export-namespace/default-es6/actual.js vendored Normal file
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@@ -0,0 +1 @@
export foo from "bar";

1
packages/babel-plugin-transform-export-namespace/test/fixtures/export-namespace/default-es6/expected.js vendored Normal file
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@@ -0,0 +1 @@
export foo from "bar";

3
packages/babel-plugin-transform-export-namespace/test/fixtures/export-namespace/namespace-compound-es6/expected.js vendored
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@@ -1,4 +1,3 @@
import _v from "mod";
export { _v as v };
export v from "mod";
import * as _ns from "mod";
export { _ns as ns };