From 0c7a845ba1d06f8b30ce0bd9d0050d60adce5fae Mon Sep 17 00:00:00 2001
From: Julian Frimmel <julian@fri-me.de>
Date: Sun, 15 Dec 2024 18:02:32 +0100
Subject: [PATCH] Periodically test repository with beta compiler

It can happen, that new compiler versions introduce new behavior to the
Rust standard library, which might impact this tool (see #111 for an ex-
ample of such an issue). Therefore this job builds the code with the
current beta compiler to detect potential issues before they reach the
stable compiler/standard library. The jobs runs once per week and will
create a GitHub issue in case of a failing build.
---
 .github/workflows/beta.yaml | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 .github/workflows/beta.yaml

diff --git a/.github/workflows/beta.yaml b/.github/workflows/beta.yaml
new file mode 100644
index 0000000..d1c2a84
--- /dev/null
+++ b/.github/workflows/beta.yaml
@@ -0,0 +1,27 @@
+# It can happen, that new compiler versions introduce new behavior to the Rust
+# standard library, which might impact this tool (see rust-lang/rust#133574 for
+# an example of such an issue). Therefore this job builds the code with the
+# current beta compiler to detect potential issues before they reach the stable
+# compiler/standard library. The jobs runs periodically.
+name: Check against Rust Beta versions
+on:
+  schedule:
+    - cron: '0 9 * * SUN'  # run at every Sunday morning
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+    steps:
+      - uses: actions/checkout@v4
+      - run: rustup update beta && rustup default beta
+      - name: Compile the code with the beta compiler
+        id: build-beta
+        run: |
+          set -uex
+          if ! cargo test > error.log 2>&1; then
+            printf 'Hello, I have detected, that this repository does not work with the current beta compiler.\n\nIt looks like, there were changes introduced, that broke this repository. The error was:\n```console\n%s\n```\nPlease take actions to fix this before the behavior reaches stable.' "$(< error.log)" | gh issue create --title 'The compilation fails with current beta compiler' --body-file -
+          fi
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GH_REPO: ${{ github.repository }}