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Upgrade to Babel 7

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Also, update to webpack 4 and add support for dynamic import() and
import.meta in ?module mode.

Fixes #108
Fixes #151
This commit is contained in:
Michael Jackson
2018-12-05 22:54:42 -05:00
parent fde375782c
commit 4fd697aec1
8 changed files with 4545 additions and 1454 deletions
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62
modules/plugins/__tests__/unpkgRewrite-test.js
View File

@ -3,57 +3,65 @@ const unpkgRewrite = require("../unpkgRewrite");
const testCases = [
{
before: "import React from 'react';",
after: "import React from 'https://unpkg.com/react@15.6.1?module';"
before: 'import React from "react";',
after: 'import React from "https://unpkg.com/react@15.6.1?module";'
},
{
before: "import router from '@angular/router';",
before: 'import router from "@angular/router";',
after:
"import router from 'https://unpkg.com/@angular/router@4.3.5?module';"
'import router from "https://unpkg.com/@angular/router@4.3.5?module";'
},
{
before: "import map from 'lodash.map';",
after: "import map from 'https://unpkg.com/lodash.map@4.6.0?module';"
before: 'import map from "lodash.map";',
after: 'import map from "https://unpkg.com/lodash.map@4.6.0?module";'
},
{
before: "import fs from 'pn/fs';",
after: "import fs from 'https://unpkg.com/pn@1.0.0/fs?module';"
before: 'import fs from "pn/fs";',
after: 'import fs from "https://unpkg.com/pn@1.0.0/fs?module";'
},
{
before: "import cupcakes from './cupcakes';",
after: "import cupcakes from './cupcakes?module';"
before: 'import cupcakes from "./cupcakes";',
after: 'import cupcakes from "./cupcakes?module";'
},
{
before: "import shoelaces from '/shoelaces';",
after: "import shoelaces from '/shoelaces?module';"
before: 'import shoelaces from "/shoelaces";',
after: 'import shoelaces from "/shoelaces?module";'
},
{
before: "import something from '//something.com/whatevs';",
after: "import something from '//something.com/whatevs';"
before: 'import something from "//something.com/whatevs";',
after: 'import something from "//something.com/whatevs";'
},
{
before: "import something from 'http://something.com/whatevs';",
after: "import something from 'http://something.com/whatevs';"
before: 'import something from "http://something.com/whatevs";',
after: 'import something from "http://something.com/whatevs";'
},
{
before: "let ReactDOM = require('react-dom');",
after: "let ReactDOM = require('react-dom');"
before: 'let ReactDOM = require("react-dom");',
after: 'let ReactDOM = require("react-dom");'
},
{
before: "export React from 'react';",
after: "export React from 'https://unpkg.com/react@15.6.1?module';"
before: 'export React from "react";',
after: 'export React from "https://unpkg.com/react@15.6.1?module";'
},
{
before: "export { Component } from 'react';",
after: "export { Component } from 'https://unpkg.com/react@15.6.1?module';"
before: 'export { Component } from "react";',
after: 'export { Component } from "https://unpkg.com/react@15.6.1?module";'
},
{
before: "export * from 'react';",
after: "export * from 'https://unpkg.com/react@15.6.1?module';"
before: 'export * from "react";',
after: 'export * from "https://unpkg.com/react@15.6.1?module";'
},
{
before: "export var message = 'hello';",
after: "export var message = 'hello';"
before: 'export var message = "hello";',
after: 'export var message = "hello";'
},
{
before: 'import("./something.js");',
after: 'import("./something.js?module");'
},
{
before: 'import("react");',
after: 'import("https://unpkg.com/react@15.6.1?module");'
}
];
@ -66,7 +74,7 @@ const dependencies = {
describe("Rewriting imports/exports", () => {
testCases.forEach(testCase => {
it(`successfully rewrites "${testCase.before}"`, () => {
it(`successfully rewrites '${testCase.before}'`, () => {
const result = babel.transform(testCase.before, {
plugins: [unpkgRewrite(dependencies)]
});

103
modules/plugins/unpkgRewrite.js
View File

@ -5,40 +5,85 @@ const origin = require("../serverConfig").origin;
const bareIdentifierFormat = /^((?:@[^/]+\/)?[^/]+)(\/.*)?$/;
function isValidURL(value) {
return URL.parseURL(value) != null;
}
function isProbablyURLWithoutProtocol(value) {
return value.substr(0, 2) === "//";
}
function isAbsoluteURL(value) {
return isValidURL(value) || isProbablyURLWithoutProtocol(value);
}
function isBareIdentifier(value) {
return value.charAt(0) !== "." && value.charAt(0) !== "/";
}
function rewriteValue(/* StringLiteral */ node, dependencies) {
if (isAbsoluteURL(node.value)) {
return;
}
if (isBareIdentifier(node.value)) {
// "bare" identifier
const match = bareIdentifierFormat.exec(node.value);
const packageName = match[1];
const file = match[2] || "";
warning(
dependencies[packageName],
'Missing version info for package "%s" in dependencies; falling back to "latest"',
packageName
);
const version = dependencies[packageName] || "latest";
node.value = `${origin}/${packageName}@${version}${file}?module`;
} else {
// local path
node.value = `${node.value}?module`;
}
}
function unpkgRewrite(dependencies = {}) {
return {
inherits: require("babel-plugin-syntax-export-extensions"),
manipulateOptions(opts, parserOpts) {
parserOpts.plugins.push(
"dynamicImport",
"exportDefaultFrom",
"exportNamespaceFrom",
"importMeta"
);
},
visitor: {
"ImportDeclaration|ExportNamedDeclaration|ExportAllDeclaration"(path) {
if (!path.node.source) return; // probably a variable declaration
if (
URL.parseURL(path.node.source.value) != null ||
path.node.source.value.substr(0, 2) === "//"
)
return; // valid URL or URL w/o protocol, leave it alone
if ([".", "/"].indexOf(path.node.source.value.charAt(0)) >= 0) {
// local path
path.node.source.value = `${path.node.source.value}?module`;
} else {
// "bare" identifier
const match = bareIdentifierFormat.exec(path.node.source.value);
const packageName = match[1];
const file = match[2] || "";
warning(
dependencies[packageName],
'Missing version info for package "%s" in dependencies; falling back to "latest"',
packageName
);
const version = dependencies[packageName] || "latest";
const url = `${origin}/${packageName}@${version}${file}?module`;
path.node.source.value = url;
CallExpression(path) {
if (path.node.callee.type !== "Import") {
// Some other function call, not import();
return;
}
rewriteValue(path.node.arguments[0], dependencies);
},
ExportAllDeclaration(path) {
return rewriteValue(path.node.source, dependencies);
},
ExportNamedDeclaration(path) {
if (!path.node.source) {
// This export has no "source", so it's probably
// a local variable or function, e.g.
// export { varName }
// export const constName = ...
// export function funcName() {}
return;
}
rewriteValue(path.node.source, dependencies);
},
ImportDeclaration(path) {
return rewriteValue(path.node.source, dependencies);
}
}
};