Files
windmill/backend
Ruben Fiszel 4d0f2c26a1 fix(bun): pass --preserve-symlinks on unbundled execution (#9147)
* fix(bun): pass --preserve-symlinks on unbundled execution

Bun 1.2/1.3 moved its global package cache to a content-addressed
layout and the installer now creates a single directory symlink from
node_modules/<pkg> to the cache entry. Without --preserve-symlinks,
Bun resolves modules from each file's realpath, so any require/import
inside an installed package walks up from cache_nomount/bun/... and
never finds the sibling deps living under <job_dir>/node_modules/.

This manifested as e.g.
  ENOENT while resolving package 'zod/v3' from
  '/tmp/windmill/cache_nomount/bun/@langchain/core@1.1.44@@@1/dist/...'
on //nobundling scripts that pull @langchain/core, even though zod is
correctly installed alongside it in node_modules.

The bundled execution path already had --preserve-symlinks since #4132
(needed because we symlink the cached bundle file into the job dir).
The unbundled path didn't, because at the time Bun installed via per-
file hardlinks and the realpath of node_modules entries was the job
dir itself. The Bun installer's layout change made the flag necessary
on the unbundled path as well.

Add the flag to all three unbundled `bun run` invocations:
- nsjail unbundled path
- non-nsjail unbundled path
- dedicated worker (always unbundled)

This also fixes a latent bug on the first run of any bun script that
imports a package whose internals reference siblings (the build_cache
path runs unbundled this round while it builds the bundle for next
time).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* test(bun): regression test for nobundling + transitive require resolution

Adds an integration test that mirrors the original failure: a //nobundling
script importing @langchain/core, which (in its CJS internals) does
require('zod/v3'). Before --preserve-symlinks was added to the unbundled
bun run invocations, this failed with:

  ENOENT while resolving package 'zod/v3' from
  '.../cache_nomount/bun/@langchain/core@<ver>@@@1/dist/runnables/base.js'

The test covers the non-nsjail unbundled path. Reproducibility of the
pre-fix failure depends on Bun's installer choosing the directory-symlink
layout for the node_modules entry (the default on Bun 1.2/1.3+ with the
new content-addressed global cache that produced the user's error).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-13 13:04:31 +00:00
..
2026-05-01 20:52:47 +00:00
2026-05-01 20:52:47 +00:00
2026-05-01 20:52:47 +00:00
2026-02-12 13:19:05 +00:00

Windmill Backend

This folder holds all backend components, the src/ folder only contains files used to build the "root" binary.

Components

name description
windmill-api The API server, exposing functionality to other components and the frontend
windmill-audit Contains audit functionality, allowing different components to record important actions
windmill-common Common code shared by all crates
windmill-queue Contains job & flow queuing functionality, commonly written to by the API server and read from by workers
windmill-worker The worker. Used to process and execute flows & jobs.
parsers Contains code to parse signatures in different langauges.

Compile sqlx for offline ci

cargo sqlx prepare --workspace -- --bin windmill --features enterprise