Merge pull request #5 from DeterminateSystems/eelcodolstra/fh-162-mag…

…ic-nix-cache-action-test-pushing-to-flakehub

Test FlakeHub push

.github/workflows/cache-test.sh

@@ -1,12 +1,45 @@
-#!/bin/sh
+#! /usr/bin/env bash
 
 set -e
 set -ux
 
 seed=$(date)
 
+log=$MAGIC_NIX_CACHE_DAEMONDIR/daemon.log
+
+binary_cache=https://attic-test.fly.dev
+
+# Check that the action initialized correctly.
+grep 'FlakeHub cache is enabled' $log
+grep 'Using cache' $log
+grep 'GitHub Action cache is enabled' $log
+
+# Build something.
 outpath=$(nix-build .github/workflows/cache-tester.nix --argstr seed "$seed")
+
+# Check that the path was enqueued to be pushed to the cache.
+grep "Enqueueing.*$outpath" $log
+
+# Wait until it has been pushed succesfully.
+found=
+for ((i = 0; i < 60; i++)); do
+    sleep 1
+    if grep "✅ $(basename $outpath)" $log; then
+        found=1
+        break
+    fi
+done
+if [[ -z $found ]]; then
+    echo "FlakeHub push did not happen." >&2
+    exit 1
+fi
+
+# Check the FlakeHub binary cache to see if the path is really there.
+nix path-info --store "$binary_cache" $outpath
+
+# FIXME: remove this once the daemon also uploads to GHA automatically.
 nix copy --to 'http://127.0.0.1:37515' "$outpath"
+
 rm ./result
 nix store delete "$outpath"
 if [ -f "$outpath" ]; then

.github/workflows/ci.yml

@@ -35,11 +35,15 @@ jobs:
   run-x86_64-linux:
     name: Run x86_64 Linux
     runs-on: ubuntu-22.04
+    permissions:
+      id-token: "write"
+      contents: "read"
     steps:
       - uses: actions/checkout@v3
       - name: Install Nix
         uses: DeterminateSystems/nix-installer-action@main
         with:
+          flakehub: true
           extra-conf: |
             narinfo-cache-negative-ttl = 0
       - name: Cache the store
@@ -51,11 +55,15 @@ jobs:
   run-x86_64-darwin:
     name: Run x86_64 Darwin
     runs-on: macos-12
+    permissions:
+      id-token: "write"
+      contents: "read"
     steps:
       - uses: actions/checkout@v3
       - name: Install Nix
         uses: DeterminateSystems/nix-installer-action@main
         with:
+          flakehub: true
           extra-conf: |
             narinfo-cache-negative-ttl = 0
       - name: Cache the store
@@ -68,11 +76,15 @@ jobs:
     name: Run aarch64 Darwin
     concurrency: build-ARM64-macOS
     runs-on: macos-latest-xlarge
+    permissions:
+      id-token: "write"
+      contents: "read"
     steps:
       - uses: actions/checkout@v3
       - name: Install Nix
         uses: DeterminateSystems/nix-installer-action@main
         with:
+          flakehub: true
           extra-conf: |
             narinfo-cache-negative-ttl = 0
       - name: Cache the store

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: 8
+    default: 10
   source-revision:
     description: The revision of `nix-magic-nix-cache` to use. Conflicts with all other `source-*` options.
     required: false

src/index.ts

@@ -72,6 +72,15 @@ async function fetchAutoCacher() {
   return `${last_path}/bin/magic-nix-cache`;
 }
 
+function tailLog(daemonDir) {
+  const log = new Tail(path.join(daemonDir, 'daemon.log'));
+  core.debug(`tailing daemon.log...`);
+  log.on('line', (line) => {
+    core.info(line);
+  });
+  return log;
+}
+
 async function setUpAutoCache() {
   const tmpdir = process.env['RUNNER_TEMP'] || os.tmpdir();
   const required_env = ['ACTIONS_CACHE_URL', 'ACTIONS_RUNTIME_URL', 'ACTIONS_RUNTIME_TOKEN'];
@@ -113,6 +122,7 @@ async function setUpAutoCache() {
   // Start the server. Once it is ready, it will notify us via file descriptor 3.
   const outputPath = `${daemonDir}/daemon.log`;
   const output = openSync(outputPath, 'a');
+  const log = tailLog(daemonDir);
   const notifyFd = 3;
   const daemon = spawn(
     daemonBin,
@@ -150,13 +160,12 @@ async function setUpAutoCache() {
     });
 
     daemon.on('exit', async (code, signal) => {
-      const log: string = await fs.readFile(outputPath, 'utf-8');
       if (signal) {
-        reject(new Error(`Daemon was killed by signal ${signal}: ${log}`));
+        reject(new Error(`Daemon was killed by signal ${signal}`));
       } else if (code) {
-        reject(new Error(`Daemon exited with code ${code}: ${log}`));
+        reject(new Error(`Daemon exited with code ${code}`));
       } else {
-        reject(new Error(`Daemon unexpectedly exited: ${log}`));
+        reject(new Error(`Daemon unexpectedly exited`));
       }
     });
   });
@@ -165,6 +174,8 @@ async function setUpAutoCache() {
 
   core.info('Launched Magic Nix Cache');
   core.exportVariable(ENV_CACHE_DAEMONDIR, daemonDir);
+
+  log.unwatch();
 }
 
 async function notifyAutoCache() {
@@ -201,13 +212,7 @@ async function tearDownAutoCache() {
     throw new Error("magic-nix-cache did not start successfully");
   }
 
-  const log = new Tail(path.join(daemonDir, 'daemon.log'));
-  core.debug(`tailing daemon.log...`);
-  log.on('line', (line) => {
-    core.debug(`got a log line`);
-    core.info(line);
-  });
-
+  const log = tailLog(daemonDir);
 
   try {
     core.debug(`about to post to localhost`);