Update CI/local test infrastructure.

.github/workflows/test.yml

@@ -0,0 +1,38 @@
+on:
+  push:
+    branches:
+      - integration
+      - '**-ci'
+  pull_request:
+    branches:
+      - master
+      - integration
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      # Let all the jobs run to completion even if one fails
+      fail-fast: false
+
+      # Test all supported versions
+      matrix:
+        pgver: [12, 13, 14, 15, 16, 17]
+
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v4
+        with:
+          path: set_user
+
+      - name: Build Test Container
+        run: docker build --build-arg UID=$(id -u) --build-arg GID=$(id -g) --build-arg PGVER=${{matrix.pgver}} -f ${GITHUB_WORKSPACE?}/set_user/test/Dockerfile.debian -t set_user-test ${GITHUB_WORKSPACE?}/set_user
+
+      - name: Run Test
+        run: docker run -v ${GITHUB_WORKSPACE?}/set_user:/set_user set_user-test /set_user/test/test.sh
+
+      - name: Show Any Regression Diffs
+        if: ${{ failure() }}
+        run: |
+          cat ${GITHUB_WORKSPACE?}/set_user/regression.diffs

.gitignore

@@ -1,6 +1,7 @@
 # Derived objects
 set_user.o
 set_user.so
+set_user.bc
 results
 
 # Generated documentation

test/Dockerfile.debian

@@ -0,0 +1,43 @@
+FROM ubuntu:latest
+
+# Install packages
+RUN apt-get update
+RUN DEBIAN_FRONTEND=noninteractive apt-get install -y sudo wget gnupg tzdata locales lsb-release apt-utils make gcc libssl-dev \
+    libkrb5-dev
+
+# PostgreSQL version
+ARG PGVER=18
+
+# Remove the default ubuntu user to reduce the chance of a conflict with the host user
+RUN userdel ubuntu
+
+# Create postgres user/group with specific IDs
+ARG UID=1000
+ARG GID=1000
+
+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 '${PGVER?} | \
+        tee -a /etc/apt/sources.list.d/pgdg.list
+RUN APT_KEY_DONT_WARN_ON_DANGEROUS_USAGE=1 && \
+    wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
+RUN apt-get update
+
+# Install PostgreSQL
+RUN apt-get install -y postgresql-${PGVER?} postgresql-server-dev-${PGVER?}
+
+# Create PostgreSQL cluster
+ENV PGBIN=/usr/lib/postgresql/${PGVER}/bin
+ENV PGDATA="/var/lib/postgresql/${PGVER}/test"
+ENV PATH="${PATH}:${PGBIN}"
+
+RUN sudo -u postgres ${PGBIN?}/initdb -A trust -k ${PGDATA?}
+RUN echo "shared_preload_libraries = 'set_user'" >> ${PGDATA}/postgresql.conf
+
+# Configure sudo
+RUN echo 'postgres ALL=(ALL) NOPASSWD: ALL' >> /etc/sudoers
+
+USER postgres

test/README.md

@@ -0,0 +1,10 @@
+# Testing
+
+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 .
+```
+Then run the test:
+```
+docker run --rm -v $(pwd):/set_user set_user-test /set_user/test/test.sh
+```

test/test.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+set -e
+
+# Clean and build set_user
+make -C /set_user clean all USE_PGXS=1
+
+# Install set_user so postgres will start with shared_preload_libraries set
+sudo bash -c "PATH=${PATH?} make -C /set_user install USE_PGXS=1"
+
+# Start postgres
+${PGBIN}/pg_ctl -w start -D ${PGDATA}
+
+# Test set_user
+make -C /set_user installcheck USE_PGXS=1