Netlify warnings on build

[braco]

What version of astro are you using?

2.6.3

Are you using an SSR adapter? If so, which one?

netlify

What package manager are you using?

yarn

What operating system are you using?

mac

What browser are you using?

chrome

Describe the Bug

Netlify is showing these warnings on build, though everything seems to work still:

7:23:55 PM: Packaging Functions from .netlify/functions-internal directory:
7:23:55 PM:  - entry.mjs
7:23:55 PM:  - renderers.mjs
7:23:55 PM: ​
7:23:55 PM: ▲ [WARNING] Ignoring this import because "node_modules/path-to-regexp/dist/index.js" was marked as having no side effects
7:23:55 PM:     .netlify/functions-internal/renderers.mjs:8:7:
7:23:55 PM:       8 │ import 'path-to-regexp';
7:23:55 PM:         ╵        ~~~~~~~~~~~~~~~~
7:23:55 PM:   "sideEffects" is false in the enclosing "package.json" file
7:23:55 PM:     node_modules/path-to-regexp/package.json:45:2:
7:23:55 PM:       45 │   "sideEffects": false,
7:23:55 PM:          ╵   ~~~~~~~~~~~~~
7:23:55 PM: ▲ [WARNING] Ignoring this import because "node_modules/path-to-regexp/dist/index.js" was marked as having no side effects
7:23:55 PM:     .netlify/functions-internal/entry.mjs:11:7:
7:23:55 PM:       11 │ import 'path-to-regexp';
7:23:55 PM:          ╵        ~~~~~~~~~~~~~~~~
7:23:55 PM:   "sideEffects" is false in the enclosing "package.json" file
7:23:55 PM:     node_modules/path-to-regexp/package.json:45:2:
7:23:55 PM:       45 │   "sideEffects": false,
7:23:55 PM:          ╵   ~~~~~~~~~~~~~
7:23:55 PM: ▲ [WARNING] Ignoring this import because "node_modules/path-to-regexp/dist/index.js" was marked as having no side effects
7:23:55 PM:     .netlify/functions-internal/renderers.mjs:8:7:
7:23:55 PM:       8 │ import 'path-to-regexp';
7:23:55 PM:         ╵        ~~~~~~~~~~~~~~~~
7:23:55 PM:   "sideEffects" is false in the enclosing "package.json" file
7:23:55 PM:     node_modules/path-to-regexp/package.json:45:2:
7:23:55 PM:       45 │   "sideEffects": false,
7:23:55 PM:          ╵   ~~~~~~~~~~~~~
7:23:55 PM: ▲ [WARNING] Ignoring this import because "node_modules/path-to-regexp/dist/index.js" was marked as having no side effects
7:23:55 PM:     .netlify/functions-internal/chunks/index@[email protected]:7:7:
7:23:55 PM:       7 │ import 'path-to-regexp';
7:23:55 PM:         ╵        ~~~~~~~~~~~~~~~~
7:23:55 PM:   "sideEffects" is false in the enclosing "package.json" file
7:23:55 PM:     node_modules/path-to-regexp/package.json:45:2:
7:23:55 PM:       45 │   "sideEffects": false,
7:23:55 PM:          ╵   ~~~~~~~~~~~~~
7:23:55 PM: ▲ [WARNING] Ignoring this import because "node_modules/path-to-regexp/dist/index.js" was marked as having no side effects
7:23:55 PM:     .netlify/functions-internal/chunks/_...5d7332d1.mjs:7:7:
7:23:55 PM:       7 │ import 'path-to-regexp';
7:23:55 PM:         ╵        ~~~~~~~~~~~~~~~~
7:23:55 PM:   "sideEffects" is false in the enclosing "package.json" file
7:23:55 PM:     node_modules/path-to-regexp/package.json:45:2:
7:23:55 PM:       45 │   "sideEffects": false,
7:23:55 PM:          ╵   ~~~~~~~~~~~~~
7:23:55 PM: ▲ [WARNING] Ignoring this import because "node_modules/path-to-regexp/dist/index.js" was marked as having no side effects
7:23:55 PM:     .netlify/functions-internal/chunks/_slug_@[email protected]:7:7:
7:23:55 PM:       7 │ import 'path-to-regexp';
7:23:55 PM:         ╵        ~~~~~~~~~~~~~~~~
7:23:55 PM:   "sideEffects" is false in the enclosing "package.json" file
7:23:55 PM:     node_modules/path-to-regexp/package.json:45:2:
7:23:55 PM:       45 │   "sideEffects": false,
7:23:55 PM:          ╵   ~~~~~~~~~~~~~
7:23:55 PM: ▲ [WARNING] Ignoring this import because "node_modules/path-to-regexp/dist/index.js" was marked as having no side effects
7:23:55 PM:     .netlify/functions-internal/chunks/research@[email protected]:7:7:
7:23:55 PM:       7 │ import 'path-to-regexp';
7:23:55 PM:         ╵        ~~~~~~~~~~~~~~~~
7:23:55 PM:   "sideEffects" is false in the enclosing "package.json" file
7:23:55 PM:     node_modules/path-to-regexp/package.json:45:2:
7:23:55 PM:       45 │   "sideEffects": false,
7:23:55 PM:          ╵   ~~~~~~~~~~~~~
7:23:55 PM: ▲ [WARNING] Ignoring this import because "node_modules/path-to-regexp/dist/index.js" was marked as having no side effects
7:23:55 PM:     .netlify/functions-internal/chunks/_page_@[email protected]:7:7:
7:23:55 PM:       7 │ import 'path-to-regexp';
7:23:55 PM:         ╵        ~~~~~~~~~~~~~~~~
7:23:55 PM:   "sideEffects" is false in the enclosing "package.json" file
7:23:55 PM:     node_modules/path-to-regexp/package.json:45:2:
7:23:55 PM:       45 │   "sideEffects": false,
7:23:55 PM:          ╵   ~~~~~~~~~~~~~
7:23:55 PM: ▲ [WARNING] Ignoring this import because "node_modules/path-to-regexp/dist/index.js" was marked as having no side effects
7:23:55 PM:     .netlify/functions-internal/chunks/_terms_@[email protected]:7:7:
7:23:55 PM:       7 │ import 'path-to-regexp';
7:23:55 PM:         ╵        ~~~~~~~~~~~~~~~~
7:23:55 PM:   "sideEffects" is false in the enclosing "package.json" file
7:23:55 PM:     node_modules/path-to-regexp/package.json:45:2:
7:23:55 PM:       45 │   "sideEffects": false,
7:23:55 PM:          ╵   ~~~~~~~~~~~~~
7:23:55 PM: ▲ [WARNING] Ignoring this import because "node_modules/path-to-regexp/dist/index.js" was marked as having no side effects
7:23:55 PM:     .netlify/functions-internal/chunks/_terms_@[email protected]:7:7:
7:23:55 PM:       7 │ import 'path-to-regexp';
7:23:55 PM:         ╵        ~~~~~~~~~~~~~~~~
7:23:55 PM:   "sideEffects" is false in the enclosing "package.json" file
7:23:55 PM:     node_modules/path-to-regexp/package.json:45:2:
7:23:55 PM:       45 │   "sideEffects": false,
7:23:55 PM:          ╵   ~~~~~~~~~~~~~
7:23:55 PM: ▲ [WARNING] Ignoring this import because "node_modules/path-to-regexp/dist/index.js" was marked as having no side effects
7:23:55 PM:     .netlify/functions-internal/chunks/search@[email protected]:7:7:
7:23:55 PM:       7 │ import 'path-to-regexp';
7:23:55 PM:         ╵        ~~~~~~~~~~~~~~~~
7:23:55 PM:   "sideEffects" is false in the enclosing "package.json" file
7:23:55 PM:     node_modules/path-to-regexp/package.json:45:2:
7:23:55 PM:       45 │   "sideEffects": false,
7:23:55 PM:          ╵   ~~~~~~~~~~~~~
7:23:55 PM: 10 of 29 warnings shown (disable the message limit with --log-limit=0)
7:23:55 PM: ​
7:23:55 PM: ❯ Functions bundled with warnings:
7:23:55 PM:    - entry.zip
7:23:55 PM:    - renderers.zip
7:23:55 PM: ​
7:23:55 PM: ❯ The following Node.js modules use dynamic expressions to include files:
7:23:55 PM:    - astro
7:23:55 PM: ​
7:23:55 PM:   Because files included with dynamic expressions aren't bundled with your serverless functions by default,
  this may result in an error when invoking a function. To resolve this error, you can mark these Node.js
7:23:55 PM:   modules as external in the [functions] section of your `netlify.toml` configuration file:
7:23:55 PM: ​
7:23:55 PM:   [functions]
7:23:55 PM:     external_node_modules = ["astro"]
7:23:55 PM: ​
7:23:55 PM:   Visit https://ntl.fyi/dynamic-imports for more information.
7:23:55 PM: ​
7:23:55 PM: ​
7:23:55 PM: (Functions bundling completed in 332ms)
7:23:55 PM: ​
7:24:02 PM: (Netlify Build completed in 10.2s)
7:24:04 PM: Section completed: building
7:24:10 PM: Finished processing build request in 37.237s

Link to Minimal Reproducible Example

https://...

Participation

• I am willing to submit a pull request for this issue.

[bluwy]

It's caused by https://rollupjs.org/faqs/#why-do-additional-imports-turn-up-in-my-entry-chunks-when-code-splitting. Maybe we can turn off output.hoistTransitiveImports for netlify functions build by default.

[github-actions]

Hello @braco. Please provide a minimal reproduction using a GitHub repository or StackBlitz. Issues marked with needs repro will be closed if they have no activity within 3 days.

[x71c9]

I managed to remove the warnings with this: #6291 (comment)