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[cli] Serialize duplicate EdgeFunction references as symlinks in vc build (#11027)

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Enables the symlink optimization that currently exists for `Lambda`
instances, but now for `EdgeFunction` instances as well. This will be
particularly beneficial for Remix applications which use edge functions
for many routes, since they will now all be represented by the same
underling function in production.

---------

Co-authored-by: Sean Massa <EndangeredMassa@gmail.com>
This commit is contained in:
Nathan Rajlich
2024-01-10 13:17:59 -08:00
committed by GitHub
parent 98040ec24e
commit ab826eb83d
9 changed files with 159 additions and 23 deletions
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39
packages/cli/test/unit/commands/build/index.test.ts
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@@ -1248,3 +1248,42 @@ describe('build', () => {
).toEqual('marketing');
});
});
it('should create symlinks for duplicate references to Lambda / EdgeFunction instances', async () => {
if (process.platform === 'win32') {
console.log('Skipping test on Windows');
return;
}
const cwd = fixture('functions-symlink');
const output = join(cwd, '.vercel/output');
client.cwd = cwd;
const exitCode = await build(client);
expect(exitCode).toEqual(0);
// "functions" directory has output Functions
const functions = await fs.readdir(join(output, 'functions'));
expect(functions.sort()).toEqual([
'edge.func',
'edge2.func',
'lambda.func',
'lambda2.func',
]);
expect(
fs.lstatSync(join(output, 'functions/lambda.func')).isDirectory()
).toEqual(true);
expect(
fs.lstatSync(join(output, 'functions/edge.func')).isDirectory()
).toEqual(true);
expect(
fs.lstatSync(join(output, 'functions/lambda2.func')).isSymbolicLink()
).toEqual(true);
expect(
fs.lstatSync(join(output, 'functions/edge2.func')).isSymbolicLink()
).toEqual(true);
expect(fs.readlinkSync(join(output, 'functions/lambda2.func'))).toEqual(
'lambda.func'
);
expect(fs.readlinkSync(join(output, 'functions/edge2.func'))).toEqual(
'edge.func'
);
});