GHA: reintroduce an env var for $GITHUB_HEAD_REF (#10659)

This should ensure GHA runs synapse against the same-named sytest branch
matrix-org · Sep 20, 2021 · f455b0e · f455b0e
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commit f455b0e
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diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
@@ -192,6 +192,7 @@ jobs:
       volumes:
         - ${{ github.workspace }}:/src
       env:
+        SYTEST_BRANCH: ${{ github.head_ref }}
         POSTGRES: ${{ matrix.postgres && 1}}
         MULTI_POSTGRES: ${{ (matrix.postgres == 'multi-postgres') && 1}}
         WORKERS: ${{ matrix.workers && 1 }}

diff --git a/changelog.d/10659.misc b/changelog.d/10659.misc
@@ -0,0 +1 @@
+Fix GitHub Actions config so we can run sytest on synapse from parallel branches.