Update actions/cache from 3 to 4

.github/workflows/ci.yml

@@ -92,7 +92,6 @@ jobs:
       fail-fast: false
       matrix:
         container:
-          - ubuntu:18.04 # glibc 2.27
           - ubuntu:20.04 # glibc 2.31
           - ubuntu:22.04 # glibc 2.35
           - ubuntu:24.04 # glibc 2.39
@@ -104,7 +103,6 @@ jobs:
           - almalinux:8-minimal # glibc 2.28
           - almalinux:9 # glibc 2.34
           - almalinux:9-minimal # glibc 2.34
-          - centos:7 # glibc 2.17
           - archlinux:latest # glibc 2.38 (as of 2024-04-18)
           - alpine:latest # musl 1.2.4 (as of alpine 3.19)
     runs-on: ubuntu-latest
@@ -120,7 +118,7 @@ jobs:
           echo "$HOME/.cargo/bin" >>"${GITHUB_PATH}"
           apt-get -qq -o Dpkg::Use-Pty=0 remove -y curl
         if: startsWith(matrix.container, 'ubuntu') || startsWith(matrix.container, 'debian')
-      - name: Install requirements (fedora/almalinux/centos)
+      - name: Install requirements (fedora/almalinux)
         run: |
           set -eEuxo pipefail
           if type -P dnf &>/dev/null; then
@@ -132,7 +130,7 @@ jobs:
           fi
           curl --proto '=https' --tlsv1.2 -fsSL --retry 10 https://sh.rustup.rs | sh -s -- -y --profile minimal --default-toolchain stable --no-modify-path
           echo "$HOME/.cargo/bin" >>"${GITHUB_PATH}"
-        if: startsWith(matrix.container, 'fedora') || startsWith(matrix.container, 'almalinux') || startsWith(matrix.container, 'centos')
+        if: startsWith(matrix.container, 'fedora') || startsWith(matrix.container, 'almalinux')
       - name: Install requirements (archlinux)
         run: pacman -Sy --noconfirm rust
         if: startsWith(matrix.container, 'archlinux')

CHANGELOG.md

@@ -10,6 +10,10 @@ Note: In this file, do not use the hard wrap in the middle of a sentence for com
 
 ## [Unreleased]
 
+- Update `actions/cache` from 3 to 4.
+
+  This [breaks compatibility with CentOS 7 and Ubuntu 18.04](https://github.com/actions/runner/issues/2906) so it is treated as a breaking change.
+
 ## [1.4.0] - 2024-04-26
 
 - Improve support for Arch based containers/self-hosted runners.

README.md

@@ -109,7 +109,7 @@ The interface of this action is a subset of the interface of [install-action], s
 
 ## Compatibility
 
-This action has been tested for GitHub-hosted runners (Ubuntu, macOS, Windows) and containers (Ubuntu, Debian, Fedora, CentOS, Alma, Arch, Alpine).
+This action has been tested for GitHub-hosted runners (Ubuntu, macOS, Windows) and containers (Ubuntu, Debian, Fedora, Alma, Arch, Alpine).
 To use this action in self-hosted runners or in containers, at least the following tools are required:
 
 - bash

action.yml

@@ -40,8 +40,7 @@ runs:
         INPUT_REV: ${{ inputs.rev }}
     - name: Restore Cache
       id: cache
-      # TODO: currently, we cannot update to v4 because node20 doesn't work on CentOS 7: https://github.com/actions/runner/issues/2906
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: ${{ steps.pre.outputs.path }}
         key: ${{ steps.pre.outputs.key }}