#!/usr/bin/env node

import { execSync } from "child_process";

import { appendFileSync } from "fs";

// Per-package matrix entries. Each object becomes one `matrix.include`

// combination in the `test` job. The flags gate steps there:

// - needs-wasm-pack: download the build artifact (wasm .js/.wasm)

// - has-wasm-pack-tests: run `npm run test:wasm-pack-{node,chrome}`

// Keeping the flags here (instead of a static `include:` block in the

// workflow) is what actually lets `detect-changes` shrink the matrix — a

// workflow `include:` entry whose `package` conflicts with the base matrix

// spawns a NEW job rather than being filtered out, which previously

// re-added every package on every PR.

const PACKAGE_CONFIG = [

{ package: "wasm-utxo", "needs-wasm-pack": true, "has-wasm-pack-tests": true },

{ package: "wasm-bip32", "needs-wasm-pack": false, "has-wasm-pack-tests": false },

{ package: "wasm-mps", "needs-wasm-pack": false, "has-wasm-pack-tests": false },

{ package: "wasm-solana", "needs-wasm-pack": false, "has-wasm-pack-tests": false },

{ package: "wasm-dot", "needs-wasm-pack": false, "has-wasm-pack-tests": false },

{ package: "wasm-ton", "needs-wasm-pack": false, "has-wasm-pack-tests": false },

{ package: "wasm-privacy-coin", "needs-wasm-pack": false, "has-wasm-pack-tests": false },

];

const ALL_PACKAGES = PACKAGE_CONFIG.map((p) => p.package);

function setOutput(entries) {

const value = JSON.stringify(entries);

appendFileSync(process.env.GITHUB_OUTPUT, `packages=${value}\n`);

console.log(`Packages to test: ${value}`);

}

function entriesFor(pkgs) {

const wanted = new Set(pkgs);

return PACKAGE_CONFIG.filter((p) => wanted.has(p.package));

}

// Non-PR events (push to master, workflow_dispatch): run everything

if (process.env.GITHUB_EVENT_NAME !== "pull_request") {

setOutput(PACKAGE_CONFIG);

process.exit(0);

}

const base = process.env.BASE_SHA;

const head = process.env.HEAD_SHA;

const changedFiles = execSync(`git diff --name-only ${base} ${head}`)

.toString()

.trim()

.split("\n")

.filter(Boolean);

// Shared infrastructure changes → run all packages

const sharedChanged = changedFiles.some((f) =>

/^(\.github\/|package\.json$|lerna\.json$|package-lock\.json$)/.test(f),

);

if (sharedChanged) {

setOutput(PACKAGE_CONFIG);

process.exit(0);

}

// Per-package detection; fall back to all if nothing package-specific changed

const changed = ALL_PACKAGES.filter((pkg) =>

changedFiles.some((f) => f.startsWith(`packages/${pkg}/`)),

);

setOutput(changed.length > 0 ? entriesFor(changed) : PACKAGE_CONFIG);