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Generate ESM functions for Netlify #6666

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merged 7 commits into from
Sep 12, 2022
Merged

Generate ESM functions for Netlify #6666

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492e582
Generate ESM functions for Netlify
eduardoboucas Sep 7, 2022
f1c292a
Prefer snake case
eduardoboucas Sep 9, 2022
131eddb
Prefer snake case
eduardoboucas Sep 9, 2022
67689d3
Prefer snake case
eduardoboucas Sep 9, 2022
8ebd7f9
Remove `tiny-glob` dependency
eduardoboucas Sep 9, 2022
c0e2254
Merge branch 'master' into netlify-mjs-lambdas
eduardoboucas Sep 12, 2022
4424940
Fix package.json
eduardoboucas Sep 12, 2022
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44 changes: 14 additions & 30 deletions packages/adapter-netlify/index.js
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Original file line number Diff line number Diff line change
@@ -1,7 +1,6 @@
import { appendFileSync, existsSync, readFileSync, writeFileSync } from 'fs';
import { dirname, join, resolve, posix } from 'path';
import { fileURLToPath } from 'url';
import glob from 'tiny-glob/sync.js';
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import esbuild from 'esbuild';
import toml from '@iarna/toml';

Expand Down Expand Up @@ -66,18 +65,14 @@ export default function ({ split = false, edge = edge_set_in_env_var } = {}) {
`\n\n/${builder.config.kit.appDir}/immutable/*\n cache-control: public\n cache-control: immutable\n cache-control: max-age=31536000\n`
);

// for esbuild, use ESM
// for zip-it-and-ship-it, use CJS until https://github.com/netlify/zip-it-and-ship-it/issues/750
const esm = netlify_config?.functions?.node_bundler === 'esbuild';

if (edge) {
if (split) {
throw new Error('Cannot use `split: true` alongside `edge: true`');
}

await generate_edge_functions({ builder });
} else {
await generate_lambda_functions({ builder, esm, split, publish });
await generate_lambda_functions({ builder, split, publish });
}
}
};
Expand Down Expand Up @@ -148,9 +143,8 @@ async function generate_edge_functions({ builder }) {
* @param {import('@sveltejs/kit').Builder} params.builder
* @param { string } params.publish
* @param { boolean } params.split
* @param { boolean } params.esm
*/
async function generate_lambda_functions({ builder, publish, split, esm }) {
async function generate_lambda_functions({ builder, publish, split }) {
builder.mkdirp('.netlify/functions-internal');

/** @type {string[]} */
Expand All @@ -160,19 +154,11 @@ async function generate_lambda_functions({ builder, publish, split, esm }) {
const replace = {
'0SERVER': './server/index.js' // digit prefix prevents CJS build from using this as a variable name, which would also get replaced
};
if (esm) {
builder.copy(`${files}/esm`, '.netlify', { replace });
} else {
glob('**/*.js', { cwd: '.netlify/server', filesOnly: true }).forEach((file) => {
const filepath = `.netlify/server/${file}`;
const input = readFileSync(filepath, 'utf8');
const output = esbuild.transformSync(input, { format: 'cjs', target: 'node12' }).code;
writeFileSync(filepath, output);
});

builder.copy(`${files}/cjs`, '.netlify', { replace });
writeFileSync(join('.netlify', 'package.json'), JSON.stringify({ type: 'commonjs' }));
}
builder.copy(`${files}/esm`, '.netlify', { replace });

// Configuring the function to use ESM as the output format.
const fn_config = JSON.stringify({ config: { nodeModuleFormat: 'esm' }, version: 1 });

if (split) {
builder.log.minor('Generating serverless functions...');
Expand Down Expand Up @@ -201,14 +187,13 @@ async function generate_lambda_functions({ builder, publish, split, esm }) {
complete: (entry) => {
const manifest = entry.generateManifest({
relativePath: '../server',
format: esm ? 'esm' : 'cjs'
format: 'esm'
});

const fn = esm
? `import { init } from '../serverless.js';\n\nexport const handler = init(${manifest});\n`
: `const { init } = require('../serverless.js');\n\nexports.handler = init(${manifest});\n`;
const fn = `import { init } from '../serverless.js';\n\nexport const handler = init(${manifest});\n`;

writeFileSync(`.netlify/functions-internal/${name}.js`, fn);
writeFileSync(`.netlify/functions-internal/${name}.mjs`, fn);
writeFileSync(`.netlify/functions-internal/${name}.json`, fn_config);

redirects.push(`${pattern} /.netlify/functions/${name} 200`);
redirects.push(`${pattern}/__data.js /.netlify/functions/${name} 200`);
Expand All @@ -220,14 +205,13 @@ async function generate_lambda_functions({ builder, publish, split, esm }) {

const manifest = builder.generateManifest({
relativePath: '../server',
format: esm ? 'esm' : 'cjs'
format: 'esm'
});

const fn = esm
? `import { init } from '../serverless.js';\n\nexport const handler = init(${manifest});\n`
: `const { init } = require('../serverless.js');\n\nexports.handler = init(${manifest});\n`;
const fn = `import { init } from '../serverless.js';\n\nexport const handler = init(${manifest});\n`;

writeFileSync('.netlify/functions-internal/render.js', fn);
writeFileSync(`.netlify/functions-internal/render.json`, fn_config);
writeFileSync('.netlify/functions-internal/render.mjs', fn);
redirects.push('* /.netlify/functions/render 200');
}

Expand Down
3 changes: 1 addition & 2 deletions packages/adapter-netlify/package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -34,8 +34,7 @@
"dependencies": {
"@iarna/toml": "^2.2.5",
"esbuild": "^0.14.48",
"set-cookie-parser": "^2.4.8",
"tiny-glob": "^0.2.9"
"set-cookie-parser": "^2.4.8"
},
"devDependencies": {
"@netlify/functions": "^1.0.0",
Expand Down
2 changes: 0 additions & 2 deletions pnpm-lock.yaml
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