Merge pull request #4 from DeterminateSystems/fetch-closure

Fetch the magic-nix-cache closure from S3

.github/workflows/ci.yml

@@ -48,18 +48,35 @@ jobs:
         run: |
           .github/workflows/cache-test.sh
 
-  # run-x86_64-darwin:
-  #   name: Run x86_64 Darwin
-  #   runs-on: macos-12
-  #   steps:
-  #     - uses: actions/checkout@v3
-  #     - name: Install Nix
-  #       uses: DeterminateSystems/nix-installer-action@main
-  #       with:
-  #         extra-conf: |
-  #           narinfo-cache-negative-ttl = 0
-  #     - name: Cache the store
-  #       uses: ./
-  #     - name: Check the cache for liveness
-  #       run: |
-  #         .github/workflows/cache-test.sh
+  run-x86_64-darwin:
+    name: Run x86_64 Darwin
+    runs-on: macos-12
+    steps:
+      - uses: actions/checkout@v3
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@main
+        with:
+          extra-conf: |
+            narinfo-cache-negative-ttl = 0
+      - name: Cache the store
+        uses: ./
+      - name: Check the cache for liveness
+        run: |
+          .github/workflows/cache-test.sh
+
+  run-aarch64-darwin:
+    name: Run aarch64 Darwin
+    concurrency: build-ARM64-macOS
+    runs-on: macos-latest-xlarge
+    steps:
+      - uses: actions/checkout@v3
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@main
+        with:
+          extra-conf: |
+            narinfo-cache-negative-ttl = 0
+      - name: Cache the store
+        uses: ./
+      - name: Check the cache for liveness
+        run: |
+          .github/workflows/cache-test.sh

action.yml

@@ -23,7 +23,7 @@ inputs:
   source-pr:
     description: The PR of `magic-nix-cache` to use. Conflicts with all other `source-*` options.
     required: false
-    default: 3
+    default: 8
   source-revision:
     description: The revision of `nix-magic-nix-cache` to use. Conflicts with all other `source-*` options.
     required: false

dist/index.js

@@ -2,9 +2,8 @@ import * as fs$2 from 'node:fs/promises';
 import * as os$2 from 'node:os';
 import os__default from 'node:os';
 import * as path$1 from 'node:path';
-import { spawn } from 'node:child_process';
-import { openSync, createWriteStream } from 'node:fs';
-import { pipeline } from 'node:stream/promises';
+import { spawn, exec } from 'node:child_process';
+import { openSync } from 'node:fs';
 import { setTimeout as setTimeout$1 } from 'timers/promises';
 import { promisify as promisify$1, inspect } from 'node:util';
 import require$$0 from 'os';
@@ -12138,14 +12137,14 @@ function getCacherUrl() {
     }
     return `${urlPrefix}/latest/${binarySuffix}`;
 }
-async function fetchAutoCacher(destination) {
-    const stream = createWriteStream(destination, {
-        encoding: "binary",
-        mode: 0o755,
-    });
+async function fetchAutoCacher() {
     const binary_url = getCacherUrl();
     coreExports.info(`Fetching the Magic Nix Cache from ${binary_url}`);
-    return pipeline(gotClient.stream(binary_url), stream);
+    const { stdout } = await promisify$1(exec)(`curl "${binary_url}" | xz -d | nix-store --import`);
+    const paths = stdout.split(os$2.EOL);
+    // Since the export is in reverse topologically sorted order, magic-nix-cache is always the penultimate entry in the list (the empty string left by split being the last).
+    const last_path = paths.at(-2);
+    return `${last_path}/bin/magic-nix-cache`;
 }
 async function setUpAutoCache() {
     const tmpdir = process.env['RUNNER_TEMP'] || os$2.tmpdir();
@@ -12167,8 +12166,7 @@ async function setUpAutoCache() {
         daemonBin = coreExports.getInput('source-binary');
     }
     else {
-        daemonBin = `${daemonDir}/magic-nix-cache`;
-        await fetchAutoCacher(daemonBin);
+        daemonBin = await fetchAutoCacher();
     }
     var runEnv;
     if (coreExports.isDebug()) {

src/index.ts

@@ -3,11 +3,10 @@
 import * as fs from 'node:fs/promises';
 import * as os from 'node:os';
 import * as path from 'node:path';
-import { spawn } from 'node:child_process';
-import { createWriteStream, openSync } from 'node:fs';
-import { pipeline } from 'node:stream/promises';
+import { spawn, exec } from 'node:child_process';
+import { openSync } from 'node:fs';
 import { setTimeout } from 'timers/promises';
-import { inspect } from 'node:util';
+import { inspect, promisify } from 'node:util';
 
 import * as core from '@actions/core';
 import { Tail } from 'tail';
@@ -59,19 +58,18 @@ function getCacherUrl() : string {
   return `${urlPrefix}/latest/${binarySuffix}`;
 }
 
-async function fetchAutoCacher(destination: string) {
-  const stream = createWriteStream(destination, {
-    encoding: "binary",
-    mode: 0o755,
-  });
-
+async function fetchAutoCacher() {
   const binary_url = getCacherUrl();
   core.info(`Fetching the Magic Nix Cache from ${binary_url}`);
 
-  return pipeline(
-    gotClient.stream(binary_url),
-    stream
-  );
+  const { stdout } = await promisify(exec)(`curl "${binary_url}" | xz -d | nix-store --import`);
+
+  const paths = stdout.split(os.EOL);
+
+  // Since the export is in reverse topologically sorted order, magic-nix-cache is always the penultimate entry in the list (the empty string left by split being the last).
+  const last_path = paths.at(-2);
+
+  return `${last_path}/bin/magic-nix-cache`;
 }
 
 async function setUpAutoCache() {
@@ -98,8 +96,7 @@ async function setUpAutoCache() {
   if (core.getInput('source-binary')) {
     daemonBin = core.getInput('source-binary');
   } else {
-    daemonBin = `${daemonDir}/magic-nix-cache`;
-    await fetchAutoCacher(daemonBin);
+    daemonBin = await fetchAutoCacher();
   }
 
   var runEnv;