[dpdk-dev] [PATCH] ci: fix default ccache in GitHub Actions

[David Marchand <david.marchand@redhat.com>]

'main' might not be the default branch name.

Fixes: 87009585e293 ("ci: hook to GitHub Actions")

Signed-off-by: David Marchand <david.marchand@redhat.com>
---
I found no other option but to call to the remote repository since github
does not seem to expose a HEAD symbolic reference.

The other alternative would be to simply rename ovsrobot/dpdk default
branch from 'master' to 'main'.
Example: https://github.com/ovsrobot/dpdk/runs/1641274373?check_suite_focus=true#step:4:4

---
 .github/workflows/build.yml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 0b72df0ebe..751eb82c16 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -67,13 +67,15 @@ jobs:
         echo 'libabigail-${{ matrix.config.os }}'
         echo -n '::set-output name=abi::'
         echo 'abi-${{ matrix.config.os }}-${{ matrix.config.compiler }}-${{ matrix.config.cross }}-${{ env.LIBABIGAIL_VERSION }}-${{ env.REF_GIT_TAG }}'
+        echo -n '::set-output name=default_branch::'
+        git ls-remote --symref origin HEAD |awk '/^ref:/ {print $2}'
     - name: Retrieve ccache cache
       uses: actions/cache@v2
       with:
         path: ~/.ccache
         key: ${{ steps.get_ref_keys.outputs.ccache }}-${{ github.ref }}
         restore-keys: |
-          ${{ steps.get_ref_keys.outputs.ccache }}-refs/heads/main
+          ${{ steps.get_ref_keys.outputs.ccache }}-${{ steps.get_ref_keys.outputs.default_branch }}
     - name: Retrieve libabigail cache
       id: libabigail-cache
       uses: actions/cache@v2
-- 
2.23.0