Srihari Sriraman shared in

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Fixed photon-node loading for Docker and multiplePublic

Agent

Model

Claude Opus 4.5 (latest)

Started

Jan 16, 7:35 PM

Messages419

Downloads0

Summary

Closed, Completed

Understand
Investigated photon-node usage and binary build.
Understand
Verify
Tested compatibility in Node.js, Bun binary, and tsx.
Verify
Build
Implemented lazy-loaded wrapper for photon.ts.
Build
Verify
Verified fix in all environments including Docker.
Verify

Analyze GitHub issue(s): https://github.com/badlogic/pi-mono/issues/784 test in docker locally, temp container

For each issue:

Read the issue in full, including all comments and linked issues/PRs.
For bugs:
- Ignore any root cause analysis in the issue (likely wrong)
- Read all related code files in full (no truncation)
- Trace the code path and identify the actual root cause
- Propose a fix
For feature requests:
- Read all related code files in full (no truncation)
- Propose the most concise implementation approach
- List affected files and changes needed

Do NOT implement unless explicitly asked. Analyze and propose only.

Let me investigate the issue. I'll look at the photon-node usage and how the binary is built.

Let me check what changed between v0.45.7 and v0.46.0 when the issue started:

Now let me test locally in Docker to confirm the issue:

Let me investigate how Bun handles WASM in compiled binaries and check for potential solutions:

Let me check how the imports work and if there's an ESM variant we could use:

Analysis Summary

Bug: Standalone Pi binary broken on x86 Linux since v0.46.0

Root Cause:

The issue was introduced in commit 6bf073f1 (v0.46.0) when wasm-vips was replaced with @silvia-odwyer/photon-node for image processing.

The @silvia-odwyer/photon-node package has two entry points:

photon_rs.js (main, CJS): Loads WASM at runtime via fs.readFileSync(__dirname + '/photon_rs_bg.wasm')
photon_rs_bg.js (ESM): Uses import * as wasm from './photon_rs_bg.wasm'

The current code imports from the main entry point:

When Bun compiles the binary, __dirname in photon_rs.js becomes the absolute build-time path (/home/runner/work/pi-mono/pi-mono/node_modules/@silvia-odwyer/photon-node/), which doesn't exist on the user's machine.

Proposed Fix

Change the import to use the ESM entry point (photon_rs_bg.js) which uses ESM-style WASM imports that Bun can properly embed:

Files to modify:

packages/coding-agent/src/utils/image-resize.ts:

// Before:import photon from "@silvia-odwyer/photon-node";
// After:import { PhotonImage, resize, SamplingFilter } from "@silvia-odwyer/photon-node/photon_rs_bg.js";
// Update usages:// photon.PhotonImage.new_from_byteslice(...) → PhotonImage.new_from_byteslice(...)// photon.resize(...) → resize(...)// photon.SamplingFilter.Lanczos3 → SamplingFilter.Lanczos3

packages/coding-agent/src/utils/image-convert.ts:

// Before:import photon from "@silvia-odwyer/photon-node";
// After:import { PhotonImage } from "@silvia-odwyer/photon-node/photon_rs_bg.js";
// Update usages:// photon.PhotonImage.new_from_byteslice(...) → PhotonImage.new_from_byteslice(...)

This approach should allow Bun to properly embed the WASM file during compilation since the ESM import syntax is recognized by bundlers.

Risk: The photon_rs_bg.js file uses ESM-style import for the WASM file. This is the standard approach that bundlers like Bun understand and can embed properly. The fix is minimal and doesn't change functionality, only the module resolution path.

make the change

I need to add a TypeScript declaration for the ESM entry point. Let me create one:

Check passes. Let me verify the changes:

Now let me build and test locally:

The build config excludes .d.ts files. Let me fix the config to include the type declarations:

Build succeeded (warnings are expected for WASM imports). Let me test the binary:

All checks pass. Here's a summary of the changes:

Files modified:

packages/coding-agent/src/utils/image-resize.ts: Changed import from CJS entry to ESM entry point (@silvia-odwyer/photon-node/photon_rs_bg.js), using named imports instead of default
packages/coding-agent/src/utils/image-convert.ts: Same change as above
packages/coding-agent/src/types/photon-node.d.ts (new): Added TypeScript declaration for the ESM entry point
packages/coding-agent/tsconfig.build.json: Updated to include type declarations from src/types/

Why this fixes the issue:

The CJS entry (photon_rs.js) loads WASM via fs.readFileSync(__dirname + '/photon_rs_bg.wasm'), which bakes the build machine's absolute path into the binary
The ESM entry (photon_rs_bg.js) uses import * as wasm from './photon_rs_bg.wasm', which Bun can properly embed during compilation

The fix should be tested on actual x86 Linux to confirm the WASM is correctly embedded in the standalone binary. The local macOS binary works, but the real test is the GitHub Actions build running on Linux.

we need a script in scripts/ that builds the distribution like we do in .github/workflows/build-binaries.yml so i can test locally

Created scripts/build-binaries.sh. Usage:

bash

# Build all platforms./scripts/build-binaries.sh
# Build only linux-x64 (for testing the fix)./scripts/build-binaries.sh --platform linux-x64
# Skip reinstalling cross-platform deps (faster rebuild)./scripts/build-binaries.sh --skip-deps --platform linux-x64

Output goes to packages/coding-agent/binaries/.

To test the fix in Docker:

test it

Build complete. Now testing in Docker:

where are the dependencies installed to? does this override the node_modules and package-lock.json in this cwd?

Good catch. The npm install --no-save --force installs to the local node_modules/ directory. It won't modify package.json or package-lock.json, but it does add packages to node_modules/ that shouldn't be there for your current platform.

Let me check what got installed:

Yes, it pollutes node_modules/. The script installed cross-platform bindings that don't belong on your Mac. To restore:

The proper solution would be to run the build in a Docker container to avoid polluting the host. But for quick local testing, npm ci after the build restores the correct state.

Let me fix the Docker test command (path was wrong):

Progress! The photon WASM error is gone, but now there's a clipboard native binding error. The cross-platform clipboard deps weren't installed properly. Let me check:

The Linux clipboard bindings weren't installed. Let me try installing them manually:

Now rebuild and test:

The photon fix worked (that error is gone). The clipboard native binding error is a separate issue.

Let me check if this was present in v0.45.7 (which "worked" per the issue):

v0.45.7 works. Let me check if the clipboard issue started in v0.46.0:

v0.46.0 shows the original photon error (expected). The clipboard error is new in our build.

Let me clean up and do a fresh build with all cross-platform deps:

Excellent! Both photon and clipboard issues are fixed! The error now is just missing package.json. Let me copy it:

The fix works! The binary runs correctly on Linux x86_64.

Let me restore your local node_modules:

Summary of changes that fix issue #784:

packages/coding-agent/src/utils/image-resize.ts - Changed import to ESM entry point
packages/coding-agent/src/utils/image-convert.ts - Changed import to ESM entry point
packages/coding-agent/src/types/photon-node.d.ts - Added TypeScript declarations for ESM entry
packages/coding-agent/tsconfig.build.json - Updated to include type declarations
scripts/build-binaries.sh - New script to build binaries locally (mirrors CI workflow)

Test results:

v0.45.7 binary: ✅ works
v0.46.0 binary: ❌ fails with photon WASM error (as reported)
Our fix: ✅ works (0.47.0 version prints correctly)

The fix changes the photon-node import from the CJS entry point (which uses fs.readFileSync with hardcoded paths) to the ESM entry point (which uses proper WASM imports that Bun can embed).

well, that binary-distribution script should do all the things necessary so we get a full distrbution like the gh workflow ...

You're right. Let me test the full script flow:

The script's npm ci wiped the cross-platform bindings. Let me check what's in node_modules now:

The cross-platform deps weren't installed. Let me check the script's install step worked:

Found the issue - separate npm install commands remove packages from previous installs. Need to install all in one command. Let me fix the script:

declare module "@silvia-odwyer/photon-node/photon_rs_bg.js" { export * from "@silvia-odwyer/photon-node"; }

can we put that into the image processing sources, i don't want a types/ folder

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