Add pyxel recipe for emscripten-forge

[Copilot]

Adds a complete recipe for pyxel, a retro game engine for Python, to support WebAssembly environments through emscripten-forge.

Changes Made

• Recipe Structure: Created complete recipe in recipes/recipes_emscripten/pyxel/ following established patterns
• Dependencies: Uses Rust toolchain and maturin build system with proper cross-compilation setup
• Build Process: Includes SDL2 setup for graphics support and WebAssembly compilation
• Testing: Implements import tests to verify basic pyxel functionality

Package Details

• Source: GitHub releases tar.gz file for v2.5.4 from https://github.com/kitao/pyxel/archive/refs/tags/v2.5.4.tar.gz
• Build System: Uses maturin (Rust + Python) following patterns from rustworkx and orjson recipes
• Requirements: Python ≥3.8, Rust toolchain, SDL2, and emscripten cross-compilation tools
• Target Platform: emscripten-wasm32 for WebAssembly environments

Files Created

• recipe.yaml - Package metadata and dependency specifications with URL source and SHA256 hash
• build.sh - Build script handling SDL2 setup and maturin compilation
• test_import_pyxel.py - Import verification and basic functionality tests using function definitions

Pyxel already includes WebAssembly support with pre-built emscripten wheels, making it well-suited for emscripten-forge. The recipe enables building pyxel from source for WebAssembly targets.

Fixes #2806.

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[IsabelParedes]

@copilot resume work

[Copilot]

@copilot resume work

I've resumed work on the pyxel recipe for emscripten-forge. I've completed the initial implementation with commit 944e9e2:

✅ What I've done:

• Researched pyxel - it's a retro game engine for Python built with Rust and maturin
• Confirmed it has WebAssembly support (includes pre-built emscripten wheels)
• Created complete recipe following emscripten-forge patterns:
  • recipe.yaml with proper metadata and Rust/maturin dependencies
  • build.sh script that builds SDL2 and uses maturin build system
  • Import test for basic functionality verification

The recipe follows the same patterns as other Rust packages in the repo (rustworkx, orjson) and is ready for testing with the full emscripten-forge channel.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• repo.prefix.dev
  • Triggering command: /home/REDACTED/work/recipes/recipes/.pixi/envs/default/bin/rattler-build build --package-format tar-bz2 -c REDACTED -c microsoft -c conda-forge --target-platform emscripten-wasm32 --skip-existing none -m variant.yaml --recipe recipes/recipes_emscripten/pyxel (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Formatting

[IsabelParedes]

@copilot make changes

[Copilot]

@copilot make changes

Made the requested changes in commit 3408ef4:

1. Changed source from git branch to URL tar file with SHA256 hash
2. Refactored tests to use function definitions instead of global scope code

The pyxel recipe now follows the established patterns for both source handling and test structure.