feat: auto push store paths and add CI (#1)

* feat: add flake devShell

* chore: add prettier

* fix: respect cache input during configure

* feat: auto push paths

* feat: add test workflow

* chore: update index.js

* refactors

* pnpm lock

* more refactors

* remove copying

---------

Co-authored-by: Ryan Cao <70191398+ryanccn@users.noreply.github.com>

.github/workflows/test.yml

@@ -0,0 +1,32 @@
+name: "Test"
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+  workflow_call:
+  workflow_dispatch:
+
+jobs:
+  test-cache:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Install Nix
+        uses: cachix/install-nix-action@v22
+
+      - name: Setup Attic Cache
+        uses: ./
+        with:
+          endpoint: ${{ secrets.ATTIC_ENDPOINT }}
+          cache: ${{ secrets.ATTIC_CACHE }}
+          token: ${{ secrets.ATTIC_TOKEN }}
+
+      - run: nix-build test.nix

.gitignore

@@ -1,3 +1,7 @@
 .DS_Store
 
 node_modules/
+
+# nix
+.direnv/
+.envrc

.prettierignore

@@ -0,0 +1,4 @@
+.direnv/
+dist/
+
+pnpm-lock.yaml

action.yml

@@ -8,9 +8,9 @@ inputs:
   cache:
     description: "attic cache"
     required: true
-  paths:
-    description: "paths to upload"
-    required: true
+  skip-push:
+    description: "set to true to disable pushing to the cache"
+    required: false
   token:
     description: "attic token"
     required: false
@@ -18,3 +18,4 @@ inputs:
 runs:
   using: "node16"
   main: "dist/index.js"
+  post: "dist/post.js"

flake.lock

@@ -0,0 +1,26 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1689534811,
+        "narHash": "sha256-jnSUdzD/414d94plCyNlvTJJtiTogTep6t7ZgIKIHiE=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "6cee3b5893090b0f5f0a06b4cf42ca4e60e5d222",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-unstable",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,36 @@
+{
+  description = "";
+
+  inputs = {
+    nixpkgs.url = "nixpkgs/nixos-unstable";
+  };
+
+  outputs =
+    { nixpkgs
+    , ...
+    }:
+    let
+      mkSystems = sys: builtins.map (arch: "${arch}-${sys}") [ "x86_64" "aarch64" ];
+      systems =
+        mkSystems "linux"
+        ++ mkSystems "darwin";
+
+      forAllSystems = nixpkgs.lib.genAttrs systems;
+      nixpkgsFor = forAllSystems (system: import nixpkgs { inherit system; });
+
+      forEachSystem = fn:
+        forAllSystems (s: fn nixpkgsFor.${s});
+    in
+    {
+      devShells = forEachSystem (pkgs: {
+        default = pkgs.mkShell {
+          packages = with pkgs; [
+            actionlint
+            nodePackages.pnpm
+          ];
+        };
+      });
+
+      formatter = forEachSystem (p: p.nixpkgs-fmt);
+    };
+}

package.json

@@ -3,7 +3,8 @@
   "version": "0.1.0",
   "description": "Cache Nix derivations with attic",
   "scripts": {
-    "build": "esbuild src/index.ts --outdir=dist --platform=node --format=cjs --bundle --minify-whitespace --minify-syntax"
+    "build": "esbuild src/index.ts src/post.ts --outdir=dist --platform=node --format=cjs --bundle --minify-whitespace --minify-syntax",
+    "format": "prettier --write ."
   },
   "keywords": [],
   "author": "Ryan Cao <hello@ryanccn.dev>",
@@ -16,6 +17,7 @@
   "devDependencies": {
     "@types/node": "^16.18.38",
     "esbuild": "^0.18.14",
+    "prettier": "3.0.0",
     "typescript": "^5.1.6"
   },
   "packageManager": "pnpm@8.6.9"

pnpm-lock.yaml

@@ -22,6 +22,9 @@ devDependencies:
   esbuild:
     specifier: ^0.18.14
     version: 0.18.14
+  prettier:
+    specifier: 3.0.0
+    version: 3.0.0
   typescript:
     specifier: ^5.1.6
     version: 5.1.6
@@ -299,6 +302,12 @@ packages:
       ufo: 1.1.2
     dev: false
 
+  /prettier@3.0.0:
+    resolution: {integrity: sha512-zBf5eHpwHOGPC47h0zrPyNn+eAEIdEzfywMoYn2XPi0P44Zp0tSq64rq0xAREh4auw2cJZHo9QUob+NqCQky4g==}
+    engines: {node: '>=14'}
+    hasBin: true
+    dev: true
+
   /tunnel@0.0.6:
     resolution: {integrity: sha512-1h/Lnq9yajKY2PEbBadPXj3VxsDDu844OnaAo52UVmIzIvwwtBPIuNvkjuzBlTWpfJyUbG3ez0KSBibQkj4ojg==}
     engines: {node: '>=0.6.11 <=0.7.0 || >=0.7.3'}

src/index.ts

@@ -1,12 +1,9 @@
 import { install } from "./stages/install";
 import { configure } from "./stages/configure";
-import { push } from "./stages/push";
 
-(async () => {
+const main = async () => {
   await install();
   await configure();
-  await push();
-})().catch((e) => {
-  console.error(e);
-  process.exit(1);
-});
+};
+
+main();

src/post.ts

@@ -0,0 +1,7 @@
+import { push } from "./stages/push";
+
+const main = async () => {
+  await push();
+};
+
+main();

src/stages/configure.ts

@@ -1,11 +1,24 @@
-import { getInput, startGroup, endGroup } from "@actions/core";
+import * as core from "@actions/core";
 import { exec } from "@actions/exec";
+import { getStorePaths } from "../utils";
 
 export const configure = async () => {
-  startGroup("Configure attic");
-  const endpoint = getInput("endpoint");
-  const token = getInput("token");
+  core.startGroup("Configure attic");
 
-  await exec("attic", ["login", "--set-default", "ci", endpoint, token]);
-  endGroup();
+  try {
+    const endpoint = core.getInput("endpoint");
+    const cache = core.getInput("cache");
+    const token = core.getInput("token");
+
+    core.info("Logging in to attic cache");
+    await exec("attic", ["login", "--set-default", cache, endpoint, token]);
+
+    core.info("Collecting store paths before build");
+    const paths = await getStorePaths();
+    core.saveState("initial-paths", JSON.stringify(paths));
+  } catch (e) {
+    core.setFailed(`Action failed with error: ${e}`);
+  }
+
+  core.endGroup();
 };

src/stages/install.ts

@@ -1,4 +1,4 @@
-import { startGroup, endGroup } from "@actions/core";
+import * as core from "@actions/core";
 import { exec } from "@actions/exec";
 import { fetch } from "ofetch";
 
@@ -7,23 +7,31 @@ import { tmpdir } from "node:os";
 import { join } from "node:path";
 
 export const install = async () => {
-  startGroup("Install attic");
+  core.startGroup("Install attic");
 
+  core.info("Installing attic");
   const installScript = await fetch(
     "https://raw.githubusercontent.com/zhaofengli/attic/main/.github/install-attic-ci.sh"
   ).then((r) => {
-    if (!r.ok)
-      throw new Error(
-        `Failed to fetch install script: ${r.status} ${r.statusText}`
-      );
+    if (!r.ok) {
+      core.setFailed(`Action failed with error: ${r.statusText}`);
+      core.endGroup();
+
+      process.exit(1);
+    }
 
     return r.text();
   });
 
+  try {
     const installScriptPath = join(tmpdir(), "install-attic-ci.sh");
 
     await writeFile(installScriptPath, installScript);
+    core.info("Running install script");
     await exec("bash", [installScriptPath]);
+  } catch (e) {
+    core.setFailed(`Action failed with error: ${e}`);
+  }
 
-  endGroup();
+  core.endGroup();
 };

src/stages/push.ts

@@ -1,9 +1,27 @@
-import { getInput, getMultilineInput } from "@actions/core";
+import * as core from "@actions/core";
 import { exec } from "@actions/exec";
+import { getStorePaths } from "../utils";
 
 export const push = async () => {
-  const cache = getInput("cache");
-  const paths = getMultilineInput("paths");
+  core.startGroup("Push to Attic");
 
-  await exec("attic", ["push", cache, ...paths]);
+  try {
+    const skipPush = core.getInput("skip-push");
+    if (skipPush === "true") {
+      core.info("Pushing to cache is disabled by skip-push");
+    } else {
+      const cache = core.getInput("cache");
+
+      core.info("Pushing to cache");
+      const oldPaths = JSON.parse(core.getState("initial-paths")) as string[];
+      const newPaths = await getStorePaths();
+      const addedPaths = newPaths.filter((p) => !oldPaths.includes(p));
+
+      await exec("attic", ["push", cache, ...addedPaths]);
+    }
+  } catch (e) {
+    core.setFailed(`Action failed with error: ${e}`);
+  }
+
+  core.endGroup();
 };

src/utils.ts

@@ -0,0 +1,21 @@
+import { exec } from "@actions/exec";
+import { Writable } from "node:stream";
+
+const streamToString = (stream: Writable): Promise<string> => {
+  const chunks: Buffer[] = [];
+  return new Promise((resolve, reject) => {
+    stream.on("data", (chunk) => chunks.push(Buffer.from(chunk)));
+    stream.on("error", (err) => reject(err));
+    stream.on("end", () => resolve(Buffer.concat(chunks).toString("utf8")));
+  });
+};
+
+export const getStorePaths = async () => {
+  const outStream = new Writable();
+  await exec("nix", ["path-info", "--all"], { outStream });
+  const paths = await streamToString(outStream)
+    .then((res) => res.split("\n"))
+    .then((paths) => paths.filter(Boolean));
+
+  return paths;
+};

test.nix

@@ -0,0 +1,7 @@
+let
+  pkgs = import <nixpkgs> { };
+  time = with builtins; toString currentTime;
+in
+pkgs.runCommand "${time}-test" { } ''
+  echo "${time}" > $out
+''