chore: replace bash script with node script

Helps with cross-platform support, in case `bash` is not available or
easily invoked (e.g., CI in Windows running in pwsh).

Signed-off-by: JP-Ellis <josh@jpellis.me>

Author: JP-Ellis

package.json

@@ -9,7 +9,7 @@
     "clean": "rimraf dist coverage .nyc_output logs pacts",
     "predist": "npm run clean",
     "dist": "tsc && copyfiles package.json ./dist",
-    "install-plugins": "./scripts/install-plugins",
+    "install-plugins": "node ./scripts/install-plugins.js",
     "lint:biome": "biome lint",
     "lint:tsc": "tsc --noEmit",
     "lint": "npm run lint:biome && npm run lint:tsc",
@@ -20,7 +20,7 @@
     "check": "npm run format && npm run lint",
     "check:fix": "npm run format:fix && npm run lint:fix",
     "release": "commit-and-tag-version",
-    "pretest": "npm run install-plugins",
+    "pretest": "node ./scripts/install-plugins.js",
     "test": "vitest run",
     "test:regression": "npm --prefix regression run test",
     "docker:alpine:build": "docker build --build-arg NODE_VERSION=${NODE_VERSION:-current} -f Dockerfile.alpine -t pact-js:alpine .",

scripts/install-plugins

@@ -0,0 +1,104 @@
+#!/usr/bin/env node
+
+const { execFileSync } = require('node:child_process');
+const {
+  existsSync,
+  mkdirSync,
+  createWriteStream,
+  chmodSync,
+} = require('node:fs');
+const { get } = require('node:https');
+const { homedir } = require('node:os');
+const { join } = require('node:path');
+const { createGunzip } = require('node:zlib');
+
+const PLUGIN_CLI_VERSION = '0.1.2';
+const MATT_PLUGIN_VERSION = '0.1.1';
+
+function detectOsArch() {
+  const { platform, arch } = process;
+  if (platform === 'linux' && arch === 'x64')
+    return { os: 'linux', arch: 'x86_64', ext: '' };
+  if (platform === 'linux' && arch === 'arm64')
+    return { os: 'linux', arch: 'aarch64', ext: '' };
+  if (platform === 'darwin' && arch === 'x64')
+    return { os: 'osx', arch: 'x86_64', ext: '' };
+  if (platform === 'darwin' && arch === 'arm64')
+    return { os: 'osx', arch: 'aarch64', ext: '' };
+  if (platform === 'win32')
+    return { os: 'windows', arch: 'x86_64', ext: '.exe' };
+  throw new Error(
+    `Unsupported platform: ${platform} ${arch}. Please install the plugin CLI manually.`,
+  );
+}
+
+function download(url, dest) {
+  return new Promise((resolve, reject) => {
+    get(url, (res) => {
+      if (res.statusCode === 301 || res.statusCode === 302) {
+        download(res.headers.location, dest).then(resolve, reject);
+        return;
+      }
+      if (res.statusCode !== 200) {
+        reject(
+          new Error(`Download failed with HTTP ${res.statusCode}: ${url}`),
+        );
+        return;
+      }
+      const out = createWriteStream(dest);
+      res.pipe(createGunzip()).pipe(out);
+      out.on('finish', () => out.close(resolve));
+      out.on('error', reject);
+    }).on('error', reject);
+  });
+}
+
+async function installPluginCli() {
+  const { os, arch, ext } = detectOsArch();
+  const binDir = join(homedir(), '.pact', 'bin');
+  const cliPath = join(binDir, `pact-plugin-cli${ext}`);
+
+  if (existsSync(cliPath)) {
+    console.log('=> Plugin CLI already installed');
+    return;
+  }
+
+  const url = `https://github.com/pact-foundation/pact-plugins/releases/download/pact-plugin-cli-v${PLUGIN_CLI_VERSION}/pact-plugin-cli-${os}-${arch}${ext}.gz`;
+  console.log(`=> Installing plugin CLI v${PLUGIN_CLI_VERSION}`);
+  console.log(`   OS: ${os}, Arch: ${arch}`);
+  console.log(`   Downloading into: ${binDir}`);
+
+  mkdirSync(binDir, { recursive: true });
+  await download(url, cliPath);
+  if (ext !== '.exe') chmodSync(cliPath, 0o755);
+}
+
+function installMattPlugin() {
+  const pluginDir = join(
+    homedir(),
+    '.pact',
+    'plugins',
+    `matt-${MATT_PLUGIN_VERSION}`,
+  );
+
+  if (existsSync(pluginDir)) {
+    console.log('=> MATT plugin already installed');
+    return;
+  }
+
+  const { ext } = detectOsArch();
+  const cliPath = join(homedir(), '.pact', 'bin', `pact-plugin-cli${ext}`);
+  const url = `https://github.com/mefellows/pact-matt-plugin/releases/tag/v${MATT_PLUGIN_VERSION}`;
+  console.log(`=> Installing MATT plugin v${MATT_PLUGIN_VERSION}`);
+  execFileSync(cliPath, ['install', url], { stdio: 'inherit' });
+}
+
+async function main() {
+  await installPluginCli();
+  installMattPlugin();
+}
+
+main().catch((err) => {
+  console.error(err.message);
+  process.exit(1);
+});