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Added configuration code that scours file path/tree for .swcrc file #9

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Added configuration code that scours file path/tree for .swcrc file #9

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61 changes: 43 additions & 18 deletions src/preset.ts
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Original file line number Diff line number Diff line change
@@ -1,3 +1,5 @@
import Path from "path";
import Fs from "fs";
import { getProjectRoot } from "@storybook/core-common";
import type { Options } from "@storybook/types";
import type { Options as SwcOptions } from "@swc/core";
Expand All @@ -8,6 +10,24 @@ const virtualModuleFiles = [
/storybook-stories\.js$/,
];

function findSWCConfigFile() {
const basePaths = [process.cwd(), Path.resolve(__dirname)];
for (const basePath of basePaths) {
const pathParts = basePath.split(/[\\\/]/);
while (pathParts.length) {
const dir = Path.join(...pathParts);
const file = Path.join(dir, ".swcrc");
if (Fs.existsSync(file)) {
return file;
}

pathParts.pop();
}
}

return null;
}

export const webpackFinal = async (config: Configuration, options: Options) => {
const swcOptions = await options.presets.apply("swc", {}, options);
const typescriptOptions = await options.presets.apply(
Expand All @@ -16,24 +36,29 @@ export const webpackFinal = async (config: Configuration, options: Options) => {
options,
);

const swcFinalOptions: SwcOptions = {
...swcOptions,
env: {
...(swcOptions?.env ?? {}),
// Transpiles the broken syntax to the closest non-broken modern syntax.
// E.g. it won't transpile parameter destructuring in Safari
// which would break how we detect if the mount context property is used in the play function.
bugfixes: swcOptions?.env?.bugfixes ?? true,
},
jsc: {
...(swcOptions.jsc ?? {}),
parser: swcOptions.jsc?.parser ?? {
syntax: "typescript",
tsx: true,
dynamicImport: true,
},
},
};
const swcConfigFile: string | null = findSWCConfigFile();

const swcFinalOptions: SwcOptions =
!!swcConfigFile && Fs.existsSync(swcConfigFile)
? JSON.parse(Fs.readFileSync(swcConfigFile, "utf-8"))
: {
...swcOptions,
env: {
...(swcOptions?.env ?? {}),
// Transpiles the broken syntax to the closest non-broken modern syntax.
// E.g. it won't transpile parameter destructuring in Safari
// which would break how we detect if the mount context property is used in the play function.
bugfixes: swcOptions?.env?.bugfixes ?? true,
},
jsc: {
...(swcOptions.jsc ?? {}),
parser: swcOptions.jsc?.parser ?? {
syntax: "typescript",
tsx: true,
dynamicImport: true,
},
},
};

config.module = {
...(config.module || {}),
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