Add post hook support

Signed-off-by: Xuanwo <github@xuanwo.io>

src/setup.ts

@@ -0,0 +1,112 @@
+// Copyright 2023 Mozilla Foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import * as core from '@actions/core';
+import {
+  downloadTool,
+  extractTar,
+  extractZip,
+  cacheDir
+} from '@actions/tool-cache';
+
+async function setup() {
+  // TODO:  we can support install latest version by default if version
+  // is not input.
+  const version = core.getInput('version');
+  console.log('try to setup sccache version: ', version);
+
+  const filename = getFilename(version);
+  const dirname = getDirname(version);
+
+  const downloadUrl = `https://github.com/mozilla/sccache/releases/download/${version}/${filename}`;
+  console.log('sccache download from url: ', downloadUrl);
+
+  // Download and extract.
+  const sccachePackage = await downloadTool(downloadUrl);
+
+  let sccachePath;
+  if (getExtension() == 'zip') {
+    sccachePath = await extractZip(sccachePackage);
+  } else {
+    sccachePath = await extractTar(sccachePackage);
+  }
+  console.log('sccache extracted to: ', sccachePath);
+
+  // Cache sccache.
+  const sccacheHome = await cacheDir(
+    `${sccachePath}/${dirname}`,
+    'sccache',
+    version
+  );
+  console.log('sccache cached to: ', sccacheHome);
+
+  // Add cached sccache into path.
+  core.addPath(`${sccacheHome}`);
+  // Expose the sccache path as env.
+  core.exportVariable('SCCACHE_PATH', `${sccacheHome}/sccache`);
+
+  // Expose the gha cache related variable to make users eaiser to
+  // integrate with gha support.
+  core.exportVariable('ACTIONS_CACHE_URL', process.env.ACTIONS_CACHE_URL || '');
+  core.exportVariable(
+    'ACTIONS_RUNTIME_TOKEN',
+    process.env.ACTIONS_RUNTIME_TOKEN || ''
+  );
+}
+
+function getFilename(version: string): Error | string {
+  return `sccache-${version}-${getArch()}-${getPlatform()}.${getExtension()}`;
+}
+
+function getDirname(version: string): Error | string {
+  return `sccache-${version}-${getArch()}-${getPlatform()}`;
+}
+
+function getArch(): Error | string {
+  switch (process.arch) {
+    case 'x64':
+      return 'x86_64';
+    case 'arm64':
+      return 'aarch64';
+    default:
+      return Error('Unsupported arch "${process.arch}"');
+  }
+}
+
+function getPlatform(): Error | string {
+  switch (process.platform) {
+    case 'darwin':
+      return 'apple-darwin';
+    case 'win32':
+      return 'pc-windows-msvc';
+    case 'linux':
+      return 'unknown-linux-musl';
+    default:
+      return Error('Unsupported platform "${process.platform}"');
+  }
+}
+
+function getExtension(): string {
+  switch (process.platform) {
+    case 'win32':
+      return 'zip';
+    default:
+      return 'tar.gz';
+  }
+}
+
+setup().catch(err => {
+  core.error(err);
+  core.setFailed(err.message);
+});