Fix nightly pg-upgrade Python dependencies

.github/actions/setup_cassert_pg/action.yml

@@ -80,6 +80,7 @@ runs:
         echo "LD_LIBRARY_PATH=$("$PG_CONFIG" --libdir):${LD_LIBRARY_PATH:-}" >> "$GITHUB_ENV"
         # configure bakes bindir/libdir into Makefile.global, so `make check-*` auto-uses this PG.
         ./configure PG_CONFIG="$PG_CONFIG" --without-pg-version-check
+        make clean
         make -j"$(nproc)" all
         # Installs into the $HOME pgenv prefix for this version -> no sudo, no clobber across versions.
         make install

.github/workflows/nightly_cassert.yml

@@ -112,17 +112,20 @@ jobs:
       - uses: ./.github/actions/setup_cassert_pg
         with:
           pg_full: ${{ matrix.new_full }}
+      - name: Install python env for upgrade harness
+        shell: bash
+        run: ( cd src/test/regress && pipenv install --deploy )
       - name: check-pg-upgrade (with and without columnar)
         shell: bash
         timeout-minutes: 90
         run: |
           set -euo pipefail
           OLD="$HOME/.pgenv/pgsql-${{ matrix.old_full }}/bin"
           NEW="$HOME/.pgenv/pgsql-${{ matrix.new_full }}/bin"
-          make -C src/test/regress check-pg-upgrade \
-            old-bindir="$OLD" new-bindir="$NEW" test-with-columnar=false
-          make -C src/test/regress check-pg-upgrade \
-            old-bindir="$OLD" new-bindir="$NEW" test-with-columnar=true
+          ( cd src/test/regress && pipenv run make -C . check-pg-upgrade \
+              old-bindir="$OLD" new-bindir="$NEW" test-with-columnar=false )
+          ( cd src/test/regress && pipenv run make -C . check-pg-upgrade \
+              old-bindir="$OLD" new-bindir="$NEW" test-with-columnar=true )
       - name: Copy pg_upgrade logs for newData dir
         if: failure()
         shell: bash