Fix broken Makefile REGRESS list and CI package conflict

Two problems were leaving main red / unbuildable:

1. Merging PRs #68, #69 and #70 mis-resolved the REGRESS list. A missing
   line-continuation backslash after semaphore_validation left
   schema_install dangling, which made `make` itself fail with
   "missing separator", and the six subsystem tests added in #68
   (free_memory, signals, ipc, semaphore_wait, scheduler, power) were
   dropped from the list even though their sql/ and expected/ files were
   committed. Rebuild the list with every test (21 total) and correct
   continuations. `make installcheck` is green again.

2. The CI workflow installed postgresql-server-dev-all, whose dependency
   on the archive's postgresql-common conflicts with the newer PGDG
   postgresql-common already present on the runner image, so the install
   step aborted before any test ran. Install versioned PGDG packages
   (postgresql-16 + postgresql-server-dev-16), detect the cluster's
   actual port, and pin PG_CONFIG so build, install and installcheck all
   target the same server.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Ty3Rkif9Vfe95w8TMiKB4b

Author: claude

.github/workflows/test.yml

@@ -4,6 +4,9 @@ on:
   push:
   pull_request:
 
+env:
+  PG_MAJOR: "16"
+
 jobs:
   test:
     runs-on: ubuntu-latest
@@ -13,30 +16,42 @@ jobs:
       - name: Install PostgreSQL and development headers
         run: |
           sudo apt-get update
-          # Server, contrib modules, client library and the PGXS build headers
-          sudo apt-get install -y postgresql postgresql-contrib libpq-dev postgresql-server-dev-all
-
-      - name: Start PostgreSQL
+          # The GitHub runner image already has the PGDG apt repo and a newer
+          # postgresql-common, which conflicts with the archive's
+          # postgresql-server-dev-all meta-package. Install versioned packages
+          # so apt stays on the PGDG line.
+          sudo apt-get install -y \
+            "postgresql-${PG_MAJOR}" \
+            "postgresql-server-dev-${PG_MAJOR}" \
+            libpq-dev
+
+      - name: Start the PostgreSQL cluster
         run: |
-          # Determine the installed major version and start the default cluster
-          PG_MAJOR=$(pg_config --version | awk '{print $2}' | cut -d. -f1)
-          echo "PG_MAJOR=$PG_MAJOR" >> "$GITHUB_ENV"
-          sudo pg_ctlcluster "$PG_MAJOR" main start
+          # The cluster may already exist on the runner; create it only if not.
+          if ! pg_lsclusters -h | awk '{print $1, $2}' | grep -qx "${PG_MAJOR} main"; then
+            sudo pg_createcluster "${PG_MAJOR}" main
+          fi
+          sudo pg_ctlcluster "${PG_MAJOR}" main start || true
+          # Whatever port the cluster ended up on, route all later steps to it.
+          PORT=$(pg_lsclusters -h | awk -v v="${PG_MAJOR}" '$1==v && $2=="main" {print $3}')
+          echo "PGHOST=/var/run/postgresql" >> "$GITHUB_ENV"
+          echo "PGPORT=$PORT" >> "$GITHUB_ENV"
 
       - name: Create a superuser role for the runner
         run: |
           # pg_regress connects over the local socket as the current OS user via
           # peer authentication, so that user needs a matching superuser role.
-          sudo -u postgres createuser --superuser "$(whoami)"
-          sudo -u postgres createdb "$(whoami)"
+          sudo -u postgres psql -p "$PGPORT" -d postgres \
+            -c "CREATE ROLE \"$(whoami)\" SUPERUSER LOGIN;" || true
+          sudo -u postgres createdb -p "$PGPORT" -O "$(whoami)" "$(whoami)" || true
 
       - name: Build and install the extension
         run: |
-          make
-          sudo make install
+          make PG_CONFIG="/usr/lib/postgresql/${PG_MAJOR}/bin/pg_config"
+          sudo make PG_CONFIG="/usr/lib/postgresql/${PG_MAJOR}/bin/pg_config" install
 
       - name: Run regression tests
-        run: make installcheck
+        run: make PG_CONFIG="/usr/lib/postgresql/${PG_MAJOR}/bin/pg_config" installcheck
 
       - name: Show regression diffs on failure
         if: failure()

Makefile

@@ -5,16 +5,22 @@ REGRESS = pg_os_basic \
           create_user \
           check_permission \
           create_process \
+          scheduler \
+          signals \
           allocate_memory \
           allocate_page \
+          free_memory \
           free_all_memory_for_process \
           create_file \
           file_versioning \
           lock_file \
+          ipc \
           load_unload_module \
           modules \
+          semaphore_wait \
+          semaphore_validation \
+          power \
           locks_security \
-          semaphore_validation
           schema_install
 REGRESS_OPTS = --outputdir=$(CURDIR)/tmp_pg_os_regress
 PGXS := $(shell $(PG_CONFIG) --pgxs)