From 4942c9b914d45dae9aadf193c97ddeb4acc8a466 Mon Sep 17 00:00:00 2001
From: Ivan Gabaldon <igabaldon@inetol.net>
Date: Thu, 7 Aug 2025 16:53:37 +0200
Subject: [PATCH] [fix] ci: cache is not overwritten (#5089)

Due to current limitations of `actions/cache`, the cache cannot be overwritten.
In our case, we need to accumulate cached wheels from different architectures.
To solve this, we simply delete the key before storing the cache again.
---
 .github/workflows/container.yml | 24 ++++++++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/container.yml b/.github/workflows/container.yml
index 496130edc..6369f1b7a 100644
--- a/.github/workflows/container.yml
+++ b/.github/workflows/container.yml
@@ -121,6 +121,8 @@ jobs:
     permissions:
       # Organization GHCR
       packages: write
+      # Clean key cache step
+      actions: write
 
     outputs:
       docker_tag: ${{ steps.build.outputs.docker_tag }}
@@ -144,8 +146,9 @@ jobs:
           restore-keys: "python-${{ env.PYTHON_VERSION }}-${{ runner.arch }}-"
           path: "./local/"
 
-      - name: Setup cache container mounts
-        uses: actions/cache@v4
+      - name: Restore cache container mounts
+        id: cache-container-mounts
+        uses: actions/cache/restore@v4
         with:
           key: "container-mounts-${{ hashFiles('./container/*.dockerfile') }}"
           restore-keys: "container-mounts-"
@@ -153,6 +156,14 @@ jobs:
             /var/tmp/buildah-cache/
             /var/tmp/buildah-cache-*/
 
+      # https://github.com/actions/cache/pull/1308
+      - if: steps.cache-container-mounts.outputs.cache-hit == 'true'
+        name: Clean key cache container mounts
+        continue-on-error: true
+        env:
+          GH_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+        run: gh cache delete container-mounts-${{ hashFiles('./container/*.dockerfile') }}
+
       - if: ${{ matrix.emulation }}
         name: Setup QEMU
         uses: docker/setup-qemu-action@v3
@@ -170,6 +181,15 @@ jobs:
           OVERRIDE_ARCH: "${{ matrix.arch }}"
         run: make podman.build
 
+      - if: always()
+        name: Save cache container mounts
+        uses: actions/cache/save@v4
+        with:
+          key: "container-mounts-${{ hashFiles('./container/*.dockerfile') }}"
+          path: |
+            /var/tmp/buildah-cache/
+            /var/tmp/buildah-cache-*/
+
   test:
     name: Test (${{ matrix.arch }})
     runs-on: ${{ matrix.os }}