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Allow function-based .babelrc.js files.

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This commit is contained in:
Logan Smyth 2017-04-13 13:39:41 -07:00
parent 911027f289
commit 2774cb7d42
1 changed files with 12 additions and 1 deletions
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13
packages/babel-core/src/config/loading/files/configuration.js
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@ -4,6 +4,7 @@ import path from "path";
import fs from "fs"; import fs from "fs";
import json5 from "json5"; import json5 from "json5";
import resolve from "resolve"; import resolve from "resolve";
import { getEnv } from "../../helpers/environment";
import { makeStrongCache } from "../../caching"; import { makeStrongCache } from "../../caching";
type ConfigFile = { type ConfigFile = {
@ -101,6 +102,16 @@ const readConfigJS = makeStrongCache((filepath, cache) => {
throw err; throw err;
} }
if (typeof options === "function") {
options = options({
cache,
// Expose ".env()" so people can easily get the same env that we expose using the "env" key.
env: () => cache.using(() => getEnv()),
});
} else {
cache.forever();
}
if (!options || typeof options !== "object" || Array.isArray(options)) { if (!options || typeof options !== "object" || Array.isArray(options)) {
throw new Error(`${filepath}: Configuration should be an exported JavaScript object.`); throw new Error(`${filepath}: Configuration should be an exported JavaScript object.`);
} }
@ -110,7 +121,7 @@ const readConfigJS = makeStrongCache((filepath, cache) => {
dirname: path.dirname(filepath), dirname: path.dirname(filepath),
options, options,
}; };
}); }, false /* autoPermacache */);
const readConfigFile = makeStaticFileCache((filepath, content) => { const readConfigFile = makeStaticFileCache((filepath, content) => {
let options; let options;