Add PostgreSQL 18 to CI.

Author: dwsteele

.github/workflows/test.yml

@@ -18,7 +18,7 @@ jobs:
 
       # Test all supported versions
       matrix:
-        pgver: [13, 14, 15, 16, 17]
+        pgver: [13, 14, 15, 16, 17, 18]
 
     steps:
       - name: Checkout Code

test/Dockerfile.debian

@@ -19,12 +19,8 @@ RUN groupadd -g $GID -o postgres
 RUN useradd -m -u $UID -g $GID -o -s /bin/bash postgres
 
 # Add PostgreSQL repository
-RUN RELEASE_CODENAME=`lsb_release -c | awk '{print $2}'` && \
-    echo 'deb http://apt.postgresql.org/pub/repos/apt/ '${RELEASE_CODENAME?}'-pgdg main '${PGVER?} | \
-        tee -a /etc/apt/sources.list.d/pgdg.list
-RUN APT_KEY_DONT_WARN_ON_DANGEROUS_USAGE=1 && \
-    wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
-RUN apt-get update
+RUN apt-get install -y --no-install-recommends postgresql-common
+RUN /usr/share/postgresql-common/pgdg/apt.postgresql.org.sh -y -c 18
 
 # Install PostgreSQL
 RUN apt-get install -y postgresql-${PGVER?} postgresql-server-dev-${PGVER?}

test/README.md

@@ -2,7 +2,7 @@
 
 Testing is performed using a Docker container. First build the container with the desired PostgreSQL version:
 ```
-docker build --build-arg UID=$(id -u) --build-arg GID=$(id -g) --build-arg PGVER=17 -f test/Dockerfile.debian -t set_user-test .
+docker build --build-arg UID=$(id -u) --build-arg GID=$(id -g) --build-arg PGVER=18 -f test/Dockerfile.debian -t set_user-test .
 ```
 Then run the test:
 ```