name: Std package

description: Lint, build/optimize (wasm), test one stdpkg, then stage its artifact. No release.

inputs:

package:

description: "json | re | math | test"

required: true

runs:

using: composite

steps:

# Stable for clippy, nightly for the build-std wasm build.

- name: Toolchain (stable)

uses: dtolnay/rust-toolchain@stable

with:

targets: wasm32-unknown-unknown

components: clippy

- name: Toolchain (nightly)

uses: dtolnay/rust-toolchain@nightly

with:

targets: wasm32-unknown-unknown

components: rust-src

- uses: denoland/setup-deno@v2

with:

deno-version: v2.x

- name: Cache Cargo

uses: actions/cache@v5

with:

path: |

~/.cargo/registry

~/.cargo/git

std/${{ inputs.package }}/target

key: cargo-std-${{ runner.os }}-${{ inputs.package }}-${{ hashFiles(format('std/{0}/Cargo.toml', inputs.package)) }}

restore-keys: cargo-std-${{ runner.os }}-${{ inputs.package }}-

- name: Cache Deno modules

uses: actions/cache@v5

with:

path: ~/.cache/deno

key: deno-${{ runner.os }}-${{ hashFiles('std/**/deno.json', 'std/**/deno.lock') }}

restore-keys: deno-${{ runner.os }}-

- name: Cache Playwright browsers

uses: actions/cache@v5

with:

path: ~/.cache/ms-playwright

key: playwright-${{ runner.os }}-chromium

- name: Install Chromium

shell: bash

run: deno run -A npm:playwright install --with-deps chromium

# apt ships an old binaryen, so fetch the upstream release.

- name: Install wasm-opt

if: inputs.package != 'test'

shell: bash

run: |

curl -sSL "https://github.com/WebAssembly/binaryen/releases/download/version_121/binaryen-version_121-x86_64-linux.tar.gz" \

| tar -xz --strip-components=2 -C /usr/local/bin "binaryen-version_121/bin/wasm-opt"

wasm-opt --version

# Lint only the cdylib; --all-targets clashes with its panic handler.

- name: Clippy

if: inputs.package != 'test'

shell: bash

working-directory: std/${{ inputs.package }}

run: cargo +stable clippy --release --target wasm32-unknown-unknown -- -D warnings

# `test` is pure Edge Python (entry.py): no crate to build.

- name: Build

if: inputs.package != 'test'

shell: bash

working-directory: std/${{ inputs.package }}

run: |

RUSTFLAGS="-Z location-detail=none -Z fmt-debug=none -Z unstable-options -C panic=immediate-abort" \

cargo +nightly build \

--target wasm32-unknown-unknown \

--lib --release \

-Z build-std=std,panic_abort

- name: Size (unoptimized)

if: inputs.package != 'test'

shell: bash

run: ls -lh "std/${{ inputs.package }}/target/wasm32-unknown-unknown/release/${{ inputs.package }}.wasm"

# Two passes: -Oz with traps-never-happen, then reflatten for a fresh CFG.

- name: Optimize

if: inputs.package != 'test'

shell: bash

env:

WASM: std/${{ inputs.package }}/target/wasm32-unknown-unknown/release/${{ inputs.package }}.wasm

run: |

wasm-opt -Oz --converge \

--generate-global-effects \

--strip-debug --strip-producers \

--enable-bulk-memory-opt \

--enable-nontrapping-float-to-int \

--enable-sign-ext \

-tnh \

-o /tmp/wasm_stage1.wasm "$WASM"

wasm-opt --flatten --rereloop -Oz -Oz \

--enable-bulk-memory-opt \

--enable-nontrapping-float-to-int \

--enable-sign-ext \

-o "$WASM" /tmp/wasm_stage1.wasm

rm /tmp/wasm_stage1.wasm

- name: Size (optimized)

if: inputs.package != 'test'

shell: bash

run: ls -lh "std/${{ inputs.package }}/target/wasm32-unknown-unknown/release/${{ inputs.package }}.wasm"

# STDPKG narrows Deno's test discovery to this package's corpus.

- name: Test

shell: bash

working-directory: std

env:

STDPKG: ${{ inputs.package }}

run: deno test --allow-all tests/

# Stage native -> <pkg>.wasm, pure-Python -> <pkg>.py.

- name: Stage artifact

shell: bash

run: |

mkdir -p _dist

if [ -f "std/${{ inputs.package }}/src/entry.py" ]; then

cp "std/${{ inputs.package }}/src/entry.py" "_dist/${{ inputs.package }}.py"

else

cp "std/${{ inputs.package }}/target/wasm32-unknown-unknown/release/${{ inputs.package }}.wasm" "_dist/${{ inputs.package }}.wasm"

fi

- name: Upload artifact

uses: actions/upload-artifact@v6

with:

name: dist-${{ inputs.package }}

path: _dist/

retention-days: 1