From 5f64b69d23bfee70d222671a7d10f2efe22b99c6 Mon Sep 17 00:00:00 2001
From: regnat <rg@regnat.ovh>
Date: Tue, 30 Nov 2021 17:32:40 +0100
Subject: [PATCH] Add a github cron to check the hydra status
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Add a regular github action that will check the status of the latest
hydra evaluation.

Things aren’t ideal right now because this job will only notify “the
user who last modified the cron syntax in the workflow file” (so myself
atm). But at least that’ll give a notification for failing hydra jobs
---
 .github/workflows/hydra_status.yml | 16 ++++++++++++++++
 scripts/check-hydra-status.sh      | 28 ++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)
 create mode 100644 .github/workflows/hydra_status.yml
 create mode 100644 scripts/check-hydra-status.sh

diff --git a/.github/workflows/hydra_status.yml b/.github/workflows/hydra_status.yml
new file mode 100644
index 000000000..b97076bd7
--- /dev/null
+++ b/.github/workflows/hydra_status.yml
@@ -0,0 +1,16 @@
+name: Hydra status
+on:
+  schedule:
+    - cron: "12,42 * * * *"
+  workflow_dispatch:
+jobs:
+  check_hydra_status:
+    name: Check Hydra status
+    if: github.repository_owner == 'NixOS'
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2.4.0
+      with:
+        fetch-depth: 0
+    - run: bash scripts/check-hydra-status.sh
+
diff --git a/scripts/check-hydra-status.sh b/scripts/check-hydra-status.sh
new file mode 100644
index 000000000..c1d2d7c40
--- /dev/null
+++ b/scripts/check-hydra-status.sh
@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+# set -x
+
+
+# mapfile BUILDS_FOR_LATEST_EVAL < <(
+# curl -H 'Accept: application/json' https://hydra.nixos.org/jobset/nix/master/evals | \
+#   jq -r '.evals[0].builds[] | @sh')
+BUILDS_FOR_LATEST_EVAL=$(
+curl -sS -H 'Accept: application/json' https://hydra.nixos.org/jobset/nix/master/evals | \
+  jq -r '.evals[0].builds[]')
+
+someBuildFailed=0
+
+for buildId in $BUILDS_FOR_LATEST_EVAL; do
+  buildInfo=$(curl -sS -H 'Accept: application/json' "https://hydra.nixos.org/build/$buildId")
+
+  buildStatus=$(echo "$buildInfo" | \
+    jq -r '.buildstatus')
+
+  if [[ "$buildStatus" -ne 0 ]]; then
+    someBuildFailed=1
+    echo "Job “$(echo "$buildInfo" | jq -r '.job')” failed on hydra"
+  fi
+done
+
+exit "$someBuildFailed"