/
index.js
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/
index.js
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import { writeFileSync } from 'fs';
import { posix } from 'path';
import { fileURLToPath } from 'url';
import * as esbuild from 'esbuild';
/** @type {import('.').default} */
export default function () {
// TODO remove for 1.0
if (arguments.length > 0) {
throw new Error(
'esbuild options can no longer be passed to adapter-cloudflare — see https://github.com/sveltejs/kit/pull/4639'
);
}
return {
name: '@sveltejs/adapter-cloudflare',
async adapt(builder) {
const files = fileURLToPath(new URL('./files', import.meta.url).href);
const dest = builder.getBuildDirectory('cloudflare');
const tmp = builder.getBuildDirectory('cloudflare-tmp');
builder.rimraf(dest);
builder.rimraf(tmp);
builder.mkdirp(tmp);
const written_files = builder.writeClient(dest);
builder.writePrerendered(dest);
const relativePath = posix.relative(tmp, builder.getServerDirectory());
builder.log.info(
`adapter-cloudfare is writing its own _headers file. If you have your own, you should duplicate the headers contained in: ${dest}/_headers`
);
writeFileSync(
`${tmp}/manifest.js`,
`export const manifest = ${builder.generateManifest({ relativePath })};\n\n` +
`export const prerendered = new Set(${JSON.stringify(builder.prerendered.paths)});\n`
);
writeFileSync(
`${dest}/_routes.json`,
JSON.stringify(get_routes_json(builder.config.kit.appDir, written_files))
);
writeFileSync(`${dest}/_headers`, generate_headers(builder.config.kit.appDir));
builder.copy(`${files}/worker.js`, `${tmp}/_worker.js`, {
replace: {
SERVER: `${relativePath}/index.js`,
MANIFEST: './manifest.js'
}
});
await esbuild.build({
platform: 'browser',
sourcemap: 'linked',
target: 'es2020',
entryPoints: [`${tmp}/_worker.js`],
outfile: `${dest}/_worker.js`,
allowOverwrite: true,
format: 'esm',
bundle: true
});
}
};
}
/**
* @param {string} app_dir
* @param {string[]} assets
* @returns {import('.').RoutesJSONSpec}
*/
function get_routes_json(app_dir, assets) {
return {
version: 1,
description: 'Generated by @sveltejs/adapter-cloudflare',
include: ['/*'],
exclude: [
`/${app_dir}/immutable/*`,
...assets
// We're being conservative by not excluding all assets in
// /static just yet. If there are any upstream auth rules to
// protect certain things (e.g. a PDF that requires auth),
// then we wouldn't want to prevent those requests from going
// to the user functions worker.
// We do want to show an example of a _routes.json that
// excludes more than just /_app/immutable/*, and favicons
// are a reasonable choice
.filter((filePath) => filePath.includes('favicon'))
]
};
}
/** @param {string} app_dir */
function generate_headers(app_dir) {
return `
# === START AUTOGENERATED SVELTE IMMUTABLE HEADERS ===
/${app_dir}/immutable/*
Cache-Control: public, immutable, max-age=31536000
X-Robots-Tag: noindex
# === END AUTOGENERATED SVELTE IMMUTABLE HEADERS ===
`.trim();
}