build and install with custom rockspec

Author: ligurio

.github/workflows/publish.yaml

@@ -65,6 +65,14 @@ jobs:
 
       - run: sudo apt install -y luarocks lua5.2 liblua5.2-dev libclang-common-14-dev clang-14
 
+      - run: printf '%s=%s\n' BRANCH_NAME_ESCAPED $(echo $BRANCH_NAME | sed -e "s#/#\\\/#g") >> "${GITHUB_ENV}"
+        env:
+          BRANCH_NAME: ${{ github.head_ref || github.ref_name }}
+
+      - run: sed -i -E
+          -e 's/branch = "master"/branch = "$BRANCH_NAME_ESCAPED"/g'
+          luzer-scm-1.rockspec
+
       - run: luarocks --local build luzer-scm-1.rockspec
 
       - run: |