implement ccache as github action

.gitignore

@@ -80,7 +80,6 @@ typings/
 
 # Nuxt.js build / generate output
 .nuxt
-dist
 
 # Gatsby files
 .cache/

action.yml

@@ -0,0 +1,15 @@
+name: "C-Cache for gh actions"
+description: "A GitHub Action that speeds up compiling for C/C++ projects."
+author: "Hendrik Muhs<[email protected]>"
+inputs:
+  key:
+    description: "An additional key for the cache"
+    required: false
+runs:
+  using: "node12"
+  main: "dist/restore/index.js"
+  post: "dist/save/index.js"
+  post-if: "success()"
+branding:
+  icon: "archive"
+  color: "gray-dark"

package.json

@@ -0,0 +1,37 @@
+{
+  "name": "ccache-action",
+  "version": "1.0.0",
+  "description": "github action to speedup building using ccache",
+  "main": "dist/restore/index.js",
+  "scripts": {
+    "prepare": "ncc build --target es2020 -o dist/restore src/restore.ts && ncc build --target es2020 -o dist/save src/save.ts"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/hendrikmuhs/ccache-action.git"
+  },
+  "keywords": [
+    "actions",
+    "ccache",
+    "cache",
+    "c++",
+    "cpp",
+    "c"
+  ],
+  "author": "Hendrik Muhs",
+  "license": "MIT",
+  "dependencies": {
+    "@actions/cache": "^1.0.4",
+    "@actions/core": "^1.2.6",
+    "@actions/exec": "^1.0.4",
+    "@actions/io": "^1.0.2"
+  },
+  "devDependencies": {
+    "@vercel/ncc": "^0.25.1",
+    "typescript": "^4.1.2"
+  },
+  "bugs": {
+    "url": "https://github.com/hendrikmuhs/ccache-action/issues"
+  },
+  "homepage": "https://github.com/hendrikmuhs/ccache-action#readme"
+}

src/restore.ts

@@ -0,0 +1,68 @@
+import * as core from "@actions/core";
+import * as io from "@actions/io";
+import * as exec from "@actions/exec";
+import * as process from "process";
+import * as cache from "@actions/cache";
+
+// based on https://cristianadam.eu/20200113/speeding-up-c-plus-plus-github-actions-using-ccache/
+
+async function install() {
+  if (process.platform === "darwin") {
+    await exec.exec("brew install ccache");
+  } else {
+    await exec.exec("apt-get update");
+    await exec.exec("apt-get install -y ccache");
+  }
+}
+
+async function restore() {
+  let restoreKey = `ccache-`;
+
+  let inputKey = core.getInput("key");
+  if (inputKey) {
+    restoreKey += `${inputKey}-`;
+  }
+
+  const restoreKeys = [
+    restoreKey
+  ]
+
+  const key = restoreKey + "-" + new Date().toUTCString();
+  const paths = [
+    '.ccache'
+  ]  
+
+  await cache.restoreCache(paths, key, restoreKeys)
+}
+
+async function configure() {
+  const ghWorkSpace = process.env.GITHUB_WORKSPACE;
+
+  core.info("Configure ccache");
+  await exec.exec("ccache --set-config=cache_dir=" + ghWorkSpace + "/.ccache");
+  await exec.exec("ccache --set-config=max_size=500M");
+  await exec.exec("ccache --set-config=compression=true");
+
+  core.info("Ccache config:")
+  await exec.exec("ccache -p");
+}
+
+async function run() {
+  let ccachePath = await io.which("ccache");
+  if (!ccachePath) {
+    core.info(`Install ccache`);
+    await install();
+    ccachePath = await io.which("ccache", true);
+  }
+
+  await restore();
+  await configure();
+
+  await exec.exec("ccache -z");
+}
+
+try {
+  run();
+} catch (err) {
+  core.setFailed(`Action failed with error ${err}`);
+}

src/save.ts

@@ -0,0 +1,24 @@
+import * as core from "@actions/core";
+import * as cache from "@actions/cache";
+
+async function run() {
+  let restoreKey = `ccache-`;
+  let inputKey = core.getInput("key");
+
+  if (inputKey) {
+    restoreKey += `${inputKey}-`;
+  }
+
+  const key = restoreKey + "-" + new Date().toUTCString();
+  const paths = [
+    '.ccache'
+  ]
+
+  await cache.saveCache(paths, key)
+}
+
+try {
+  run();
+} catch (err) {
+  core.setFailed(`Action failed with error ${err}`);
+}

tsconfig.json

@@ -0,0 +1,21 @@
+{
+  "compilerOptions": {
+    "noEmitOnError": false,
+    "diagnostics": true,
+    "lib": ["esnext"],
+
+    "target": "es2020",
+
+    "resolveJsonModule": true,
+    "moduleResolution": "node",
+    "module": "esnext",
+    "esModuleInterop": true,
+
+    "strict": true,
+    "skipLibCheck": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noImplicitReturns": true
+  },
+  "exclude": ["dist"]
+}