From 699bb3b786407e1ff112fe31d0933ed66aceddf4 Mon Sep 17 00:00:00 2001
From: Alexander Grund <Flamefire@users.noreply.github.com>
Date: Sat, 4 Jun 2022 10:49:49 +0200
Subject: [PATCH] Fix ccache saving on cache hit

When a cache with the key exists it is NOT saved even when changed.
Hence make the key unique to a commit (SHA) and restore the most recent
cache with a key prefixed by the part without the SHA.
---
 .github/workflows/ci.yml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b3c9eb0..f60c626 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -137,7 +137,8 @@ jobs:
         if: env.B2_USE_CCACHE
         with:
           path: ~/.ccache
-          key: ${{matrix.os}}-${{matrix.container}}-${{matrix.compiler}}
+          key: ${{matrix.os}}-${{matrix.container}}-${{matrix.compiler}}-${{github.sha}}
+          restore-keys: ${{matrix.os}}-${{matrix.container}}-${{matrix.compiler}}-
 
       - name: Fetch Boost.CI
         uses: actions/checkout@v3