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import path from "path";
import fs from "fs-extra";
import semverPrerelease from "semver/functions/prerelease";
import cliPkgJson from "../../package.json";
import { isDefaultExample } from "../utils/isDefaultExample";
import { TransformInput, TransformResult } from "./types";
import { TransformError } from "./errors";
const meta = {
name: "official-starter",
};
// applied to "official starter" examples (those hosted within vercel/turbo/examples)
export async function transform(args: TransformInput): TransformResult {
const { prompts, example } = args;
const defaultExample = isDefaultExample(example.name);
const isOfficialStarter =
!example.repo ||
(example.repo?.username === "vercel" && example.repo?.name === "turbo");
if (!isOfficialStarter) {
return { result: "not-applicable", ...meta };
}
// paths
const rootPackageJsonPath = path.join(prompts.root, "package.json");
const rootMetaJsonPath = path.join(prompts.root, "meta.json");
const hasPackageJson = fs.existsSync(rootPackageJsonPath);
// 1. remove meta file (used for generating the examples page on turbo.build)
try {
fs.rmSync(rootMetaJsonPath, { force: true });
} catch (_err) {}
if (hasPackageJson) {
let packageJsonContent;
try {
packageJsonContent = fs.readJsonSync(rootPackageJsonPath);
} catch {
throw new TransformError("Unable to read package.json", {
transform: meta.name,
fatal: false,
});
}
// if using the basic example, set the name to the project name (legacy behavior)
if (packageJsonContent) {
if (defaultExample) {
packageJsonContent.name = prompts.projectName;
}
// if we're using a pre-release version of create-turbo, install turbo canary instead of latest
const shouldUsePreRelease = semverPrerelease(cliPkgJson.version) !== null;
if (shouldUsePreRelease && packageJsonContent?.devDependencies?.turbo) {
packageJsonContent.devDependencies.turbo = "canary";
}
try {
fs.writeJsonSync(rootPackageJsonPath, packageJsonContent, {
spaces: 2,
});
} catch (err) {
throw new TransformError("Unable to write package.json", {
transform: meta.name,
fatal: false,
});
}
}
}
return { result: "success", ...meta };
}
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