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authorruki <waruqi@gmail.com>2018-11-08 00:43:05 +0800
committerruki <waruqi@gmail.com>2018-11-07 22:18:30 +0800
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tree4f44cf41b828577d583890bdd5a1c31e8491a6ba /node_modules/@babel/helper-plugin-utils/src
parentaa7f0199255277949790b41c56e8ec97dd4f0da4 (diff)
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Diffstat (limited to 'node_modules/@babel/helper-plugin-utils/src')
-rw-r--r--node_modules/@babel/helper-plugin-utils/src/README.md41
-rw-r--r--node_modules/@babel/helper-plugin-utils/src/index.js95
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diff --git a/node_modules/@babel/helper-plugin-utils/src/README.md b/node_modules/@babel/helper-plugin-utils/src/README.md
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-# @babel/helper-plugin-utils
-
-The intention of this module is to provide a place for us to expose a
-standardized API layer over top of what Babel's core API provides on its own.
-
-This is not aiming to implement APIs that are missing on a given Babel version,
-but it is means to provide clear error messages if a plugin is run on a version
-of Babel that doesn't have the APIs that the plugin is trying to use.
-
-Every one of Babel's core plugins and presets will use this module, and ideally
-because of that its size should be kept to a miminum because this may or may
-not be deduplicated when installed.
-
-
-## Usage
-
-```js
-import { declare } from "@babel/helper-plugin-utils";
-
-export default declare((api, options, dirname) => {
- return {};
-});
-```
-
-
-## What this does
-
-Currently, this plugin provides a few services to ensure that plugins function
-well-enough to throw useful errors.
-
-### `options` is always passed
-
-Babel 6 does not pass a second parameter. This frequently means that plugins
-written for Babel 7 that use `options` will attempt to destructure options
-out of an `undefined` value. By supplying the default, we avoid that risk.
-
-### `api.assertVersion` always exists
-
-Babel 6 and early betas of Babel 7 do not have `assertVersion`, so this
-wrapper ensures that it exists and throws a useful error message when not
-supplied by Babel itself.
diff --git a/node_modules/@babel/helper-plugin-utils/src/index.js b/node_modules/@babel/helper-plugin-utils/src/index.js
deleted file mode 100644
index f0ecb83a..00000000
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-export function declare(builder) {
- return (api, options, dirname) => {
- if (!api.assertVersion) {
- // Inject a custom version of 'assertVersion' for Babel 6 and early
- // versions of Babel 7's beta that didn't have it.
- api = Object.assign(copyApiObject(api), {
- assertVersion(range) {
- throwVersionError(range, api.version);
- },
- });
- }
-
- return builder(api, options || {}, dirname);
- };
-}
-
-function copyApiObject(api) {
- // Babel >= 7 <= beta.41 passed the API as a new object that had
- // babel/core as the prototype. While slightly faster, it also
- // means that the Object.assign copy below fails. Rather than
- // keep complexity, the Babel 6 behavior has been reverted and this
- // normalizes all that for Babel 7.
- let proto = null;
- if (typeof api.version === "string" && /^7\./.test(api.version)) {
- proto = Object.getPrototypeOf(api);
- if (
- proto &&
- (!has(proto, "version") ||
- !has(proto, "transform") ||
- !has(proto, "template") ||
- !has(proto, "types"))
- ) {
- proto = null;
- }
- }
-
- return {
- ...proto,
- ...api,
- };
-}
-
-function has(obj, key) {
- return Object.prototype.hasOwnProperty.call(obj, key);
-}
-
-function throwVersionError(range, version) {
- if (typeof range === "number") {
- if (!Number.isInteger(range)) {
- throw new Error("Expected string or integer value.");
- }
- range = `^${range}.0.0-0`;
- }
- if (typeof range !== "string") {
- throw new Error("Expected string or integer value.");
- }
-
- const limit = Error.stackTraceLimit;
-
- if (typeof limit === "number" && limit < 25) {
- // Bump up the limit if needed so that users are more likely
- // to be able to see what is calling Babel.
- Error.stackTraceLimit = 25;
- }
-
- let err;
- if (version.slice(0, 2) === "7.") {
- err = new Error(
- `Requires Babel "^7.0.0-beta.41", but was loaded with "${version}". ` +
- `You'll need to update your @babel/core version.`,
- );
- } else {
- err = new Error(
- `Requires Babel "${range}", but was loaded with "${version}". ` +
- `If you are sure you have a compatible version of @babel/core, ` +
- `it is likely that something in your build process is loading the ` +
- `wrong version. Inspect the stack trace of this error to look for ` +
- `the first entry that doesn't mention "@babel/core" or "babel-core" ` +
- `to see what is calling Babel.`,
- );
- }
-
- if (typeof limit === "number") {
- Error.stackTraceLimit = limit;
- }
-
- throw Object.assign(
- err,
- ({
- code: "BABEL_VERSION_UNSUPPORTED",
- version,
- range,
- }: any),
- );
-}