From 434213e1777490a9a7a7c71e5f9716982a8efa64 Mon Sep 17 00:00:00 2001
From: Niklas Sombert <niklas.sombert@uni-duesseldorf.de>
Date: Fri, 7 Jun 2024 17:42:54 +0200
Subject: [PATCH] Switch the CI to Ubuntu 20.04

This is currently the oldest supported version of Ubuntu according to
<https://github.com/actions/runner-images#available-images>. This is
because applications linked against glibc only work on that version of
glibc (or newer ones).
---
 .github/workflows/build.yml   |  8 ++++++--
 .github/workflows/release.yml | 12 ++++++++++--
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d23ca48..ef6bcd7 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,7 +1,11 @@
 on: [push]
 jobs:
     build:
-        runs-on: ubuntu-latest
+        # This is the oldest supported version of Ubuntu according to
+        # <https://github.com/actions/runner-images#available-images>. This is
+        # because applications linked against glibc only work on that version of
+        # glibc (or newer ones).
+        runs-on: ubuntu-20.04
         steps:
             - uses: actions/checkout@v3
             - name: Cache Cargo
@@ -56,7 +60,7 @@ jobs:
                   name: towbootctl-debug-x86_64-linux
                   path: target/x86_64-unknown-linux-gnu/debug/towbootctl
             - name: Install compiler for x86_64-windows
-              run: sudo apt-get update && sudo apt-get install gcc-mingw-w64-x86-64-win32
+              run: sudo apt-get update && sudo apt-get install gcc-mingw-w64-x86-64
             - name: Install Rust for x86_64-windows
               uses: actions-rs/toolchain@v1
               with:
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 196ac76..70bf5ce 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -4,7 +4,11 @@ on:
         tags: 'v*'
 jobs:
     release:
-        runs-on: ubuntu-latest
+        # This is the oldest supported version of Ubuntu according to
+        # <https://github.com/actions/runner-images#available-images>. This is
+        # because applications linked against glibc only work on that version of
+        # glibc (or newer ones).
+        runs-on: ubuntu-20.04
         steps:
             - uses: actions/checkout@v3
             - name: Cache Cargo
@@ -44,7 +48,7 @@ jobs:
                   command: build
                   args: --package towbootctl --target x86_64-unknown-linux-gnu --features=binary --release
             - name: Install compiler for x86_64-windows
-              run: sudo apt-get update && sudo apt-get install gcc-mingw-w64-x86-64-win32
+              run: sudo apt-get update && sudo apt-get install gcc-mingw-w64-x86-64
             - name: Install Rust for x86_64-windows
               uses: actions-rs/toolchain@v1
               with:
@@ -86,6 +90,10 @@ jobs:
               env:
                 GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     release-macos:
+        # We could cross-compile from Linux instead,
+        # but we'd still need the Xcode Command Line Tools.
+        # Downloading them requires logging in with an Apple ID,
+        # which is not possible in the CI. The macOS runners include it.
         runs-on: macos-latest
         needs: release
         steps: