Experimental test workflow with devcontainer

.devcontainer/Dockerfile

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+ARG GO_VERSION=1.24
+ARG DEBIAN_CODENAME=trixie
+
+FROM mcr.microsoft.com/devcontainers/go:${GO_VERSION}-${DEBIAN_CODENAME}
+
+ARG PG_MAJOR=16
+ARG MARIADB_MAJOR=12.0.2
+
+USER root
+
+# Add PostgreSQL and MariaDB official repositories (detect codename from /etc/os-release)
+RUN apt-get update \
+    && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+       wget ca-certificates gnupg curl \
+    && wget -qO- https://www.postgresql.org/media/keys/ACCC4CF8.asc | gpg --dearmor -o /etc/apt/trusted.gpg.d/postgresql.gpg \
+    && echo "deb http://apt.postgresql.org/pub/repos/apt $(. /etc/os-release && echo $VERSION_CODENAME)-pgdg main" > /etc/apt/sources.list.d/pgdg.list \
+    && curl -LsSO https://r.mariadb.com/downloads/mariadb_repo_setup \
+    && chmod +x mariadb_repo_setup \
+    && ./mariadb_repo_setup --mariadb-server-version="mariadb-${MARIADB_MAJOR}" --skip-maxscale --skip-tools \
+    && rm -f mariadb_repo_setup \
+    && apt-get update \
+    && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+       postgresql-${PG_MAJOR} postgresql-client-${PG_MAJOR} \
+       mariadb-server mariadb-client \
+    && rm -rf /var/lib/apt/lists/*
+
+# Prepare user-owned data dirs for rootless startup
+RUN mkdir -p /home/vscode/.local/share/pg/pgdata \
+    && mkdir -p /home/vscode/.local/share/mysql \
+    && chown -R vscode:vscode /home/vscode/.local/share
+
+# Set environment variables based on build args
+ENV PG_BIN_DIR=/usr/lib/postgresql/${PG_MAJOR}/bin
+
+USER vscode
+

.devcontainer/devcontainer.json

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+{
+    "name": "singularity",
+    "build": {
+        "dockerfile": "Dockerfile",
+        "args": {
+            "GO_VERSION": "1.24",
+            "DEBIAN_CODENAME": "trixie",
+            "PG_MAJOR": "16",
+            "MARIADB_MAJOR": "12.0.2"
+        }
+    },
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                "golang.go",
+                "eamodio.gitlens"
+            ],
+            "settings": {
+                "go.useLanguageServer": true,
+                "go.toolsEnvVars": {
+                    "GOPATH": "/home/vscode/go"
+                }
+            }
+        }
+    },
+    "forwardPorts": [],
+    "workspaceMount": "source=${localWorkspaceFolder},target=/workspaces/singularity,type=bind,consistency=cached,relabel=private",
+    "workspaceFolder": "/workspaces/singularity",
+    "postCreateCommand": "/bin/bash -lc '${containerWorkspaceFolder}/.devcontainer/post-create.sh'",
+	"postStartCommand": "/bin/bash -lc '${containerWorkspaceFolder}/.devcontainer/start-postgres.sh && ${containerWorkspaceFolder}/.devcontainer/start-mysql.sh'",
+    "remoteUser": "vscode",
+    "containerEnv": {
+        "GOPATH": "/home/vscode/go",
+        "MYSQL_DATABASE": "singularity",
+        "MYSQL_USER": "singularity",
+        "MYSQL_PASSWORD": "singularity",
+        "MYSQL_SOCKET": "/home/vscode/.local/share/mysql/mysql.sock",
+        "PGDATA": "/home/vscode/.local/share/pg/pgdata",
+        "PGPORT": "55432",
+        "PGSOCK_DIR": "/home/vscode/.local/share/pg"
+    },
+    "runArgs": ["--userns=keep-id"],
+    "containerUser": "vscode"
+}
+

.devcontainer/init-mysql.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+# MariaDB client is required for init
+
+# Resolve socket path; default to user-owned socket
+SOCKET="${MYSQL_SOCKET:-${HOME}/.local/share/mysql/mysql.sock}"
+
+## Removed one-time init guard; operations below are idempotent
+
+# Determine root auth flags
+MYSQL_ROOT_FLAGS=("-uroot")
+if [ -n "${MYSQL_ROOT_PASSWORD:-}" ]; then
+  MYSQL_ROOT_FLAGS+=("-p${MYSQL_ROOT_PASSWORD}")
+fi
+
+# Wait for server readiness (best effort)
+echo "Waiting for MySQL server at socket: $SOCKET"
+for i in {1..60}; do
+  if mariadb-admin --socket="$SOCKET" ping "${MYSQL_ROOT_FLAGS[@]}" >/dev/null 2>&1; then
+    echo "MySQL server is ready for init"
+    break
+  fi
+  sleep 1
+done
+
+# Bail if still unreachable
+if ! mariadb-admin --socket="$SOCKET" ping "${MYSQL_ROOT_FLAGS[@]}" >/dev/null 2>&1; then
+  echo "MySQL server not reachable, init failed"
+  exit 1
+fi
+
+# Create database and user idempotently (MySQL 8+ supports IF NOT EXISTS for users)
+DB=${MYSQL_DATABASE:-singularity}
+USER=${MYSQL_USER:-singularity}
+PASS=${MYSQL_PASSWORD:-singularity}
+
+echo "Creating database and user: ${USER}@localhost and ${USER}@%"
+mariadb --socket="$SOCKET" "${MYSQL_ROOT_FLAGS[@]}" <<SQL
+CREATE DATABASE IF NOT EXISTS \`${DB}\`;
+CREATE USER IF NOT EXISTS '${USER}'@'localhost' IDENTIFIED BY '${PASS}';
+CREATE USER IF NOT EXISTS '${USER}'@'%' IDENTIFIED BY '${PASS}';
+-- tests create per-run databases, so grant global privileges for dev only
+GRANT ALL PRIVILEGES ON *.* TO '${USER}'@'localhost' WITH GRANT OPTION;
+GRANT ALL PRIVILEGES ON *.* TO '${USER}'@'%' WITH GRANT OPTION;
+GRANT ALL PRIVILEGES ON \`${DB}\`.* TO '${USER}'@'localhost';
+GRANT ALL PRIVILEGES ON \`${DB}\`.* TO '${USER}'@'%';
+FLUSH PRIVILEGES;
+SQL
+
+echo "MySQL init completed successfully"
+
+## No marker file; script can run safely on every start
+
+

.devcontainer/post-create.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+# Initialize Go modules
+go mod download
+
+chmod +x .devcontainer/*.sh || true
+
+# Initialize database systems
+echo "Setting up databases..."
+
+# Create data directories
+mkdir -p /home/vscode/.local/share/pg/pgdata /home/vscode/.local/share/pg /home/vscode/.local/share/mysql/data /home/vscode/.local/share/mysql
+
+# Initialize Postgres
+if [ ! -f "/home/vscode/.local/share/pg/pgdata/PG_VERSION" ]; then
+  echo "Initializing Postgres..."
+  /usr/lib/postgresql/16/bin/initdb -D /home/vscode/.local/share/pg/pgdata --auth trust --auth-local trust --auth-host trust
+  echo "listen_addresses='localhost'" >> /home/vscode/.local/share/pg/pgdata/postgresql.conf
+  {
+    echo 'host    all all 127.0.0.1/32     trust'
+    echo 'host    all all ::1/128          trust'
+    echo 'local   all all                  trust'
+  } >> /home/vscode/.local/share/pg/pgdata/pg_hba.conf
+fi
+
+# Initialize MariaDB
+if [ ! -d "/home/vscode/.local/share/mysql/data/mysql" ]; then
+  echo "Initializing MariaDB..."
+  mariadb-install-db --datadir=/home/vscode/.local/share/mysql/data --auth-root-authentication-method=normal --skip-test-db >/dev/null
+fi
+
+# Start both servers
+echo "Starting database servers..."
+.devcontainer/start-postgres.sh
+.devcontainer/start-mysql.sh
+
+# Create users (databases will be created during testing as needed)
+echo "Creating database users..."
+
+# Postgres setup
+psql -h localhost -p 55432 -d postgres -c "CREATE USER singularity WITH SUPERUSER CREATEDB CREATEROLE LOGIN;"
+
+# MySQL setup  
+mariadb --socket=/home/vscode/.local/share/mysql/mysql.sock -uroot <<SQL
+CREATE USER 'singularity'@'localhost' IDENTIFIED BY 'singularity';
+CREATE USER 'singularity'@'%' IDENTIFIED BY 'singularity';
+GRANT ALL PRIVILEGES ON *.* TO 'singularity'@'localhost' WITH GRANT OPTION;
+GRANT ALL PRIVILEGES ON *.* TO 'singularity'@'%' WITH GRANT OPTION;
+FLUSH PRIVILEGES;
+SQL
+
+echo "Database setup completed successfully"
+
+

.devcontainer/start-mysql.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+# MariaDB server configuration
+MYSQL_BASE="${HOME}/.local/share/mysql"
+DATA_DIR="${MYSQL_BASE}/data"
+SOCKET="${MYSQL_SOCKET:-${MYSQL_BASE}/mysql.sock}"
+PID_FILE="${MYSQL_BASE}/mysql.pid"
+PORT="${MYSQL_PORT:-3306}"
+LOG_FILE="${MYSQL_BASE}/mysql.err"
+
+# Check if already running
+if [ -S "${SOCKET}" ] && mariadb-admin --socket="${SOCKET}" ping >/dev/null 2>&1; then
+  echo "MySQL already running"
+  exit 0
+fi
+
+# Start MariaDB server
+echo "Starting MySQL server"
+touch "${LOG_FILE}"
+nohup mariadbd \
+  --datadir="${DATA_DIR}" \
+  --socket="${SOCKET}" \
+  --pid-file="${PID_FILE}" \
+  --bind-address=127.0.0.1 \
+  --port="${PORT}" \
+  --skip-name-resolve \
+  --log-error="${LOG_FILE}" \
+  >/dev/null 2>&1 &
+
+# Wait for MySQL to be ready
+for i in {1..60}; do
+  if [ -S "${SOCKET}" ] && grep -q "ready for connections" "${LOG_FILE}" >/dev/null 2>&1; then
+    echo "MySQL server is ready"
+    exit 0
+  fi
+  sleep 1
+done
+
+echo "MySQL server failed to start"
+if [ -f "${LOG_FILE}" ]; then
+  echo "--- Begin MariaDB error log ---"
+  tail -n 200 "${LOG_FILE}" || true
+  echo "--- End MariaDB error log ---"
+fi
+exit 1

.devcontainer/start-postgres.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+# Postgres server configuration
+PGDATA_DIR="${PGDATA:-/home/vscode/.local/share/pg/pgdata}"
+LOG_FILE="${PGDATA_DIR}/postgres.log"
+PGSOCK_DIR="${PGSOCK_DIR:-/home/vscode/.local/share/pg}"
+PGPORT="${PGPORT:-55432}"
+PG_BIN_DIR="${PG_BIN_DIR:-/usr/lib/postgresql/16/bin}"
+
+# Check if already running
+if "${PG_BIN_DIR}/pg_ctl" -D "$PGDATA_DIR" status >/dev/null 2>&1; then
+  echo "Postgres already running"
+  exit 0
+fi
+
+# Start Postgres server
+echo "Starting Postgres server"
+"${PG_BIN_DIR}/pg_ctl" -D "$PGDATA_DIR" -l "$LOG_FILE" -w -o "-p ${PGPORT} -k ${PGSOCK_DIR}" start
+
+

.github/workflows/devcontainer-podman.yml

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+name: CI (Podman Devcontainer)
+
+on:
+  push:
+    branches: [ main, develop ]
+  pull_request:
+    branches: [ main, develop ]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.event_name == 'push' && github.sha || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  devcontainer-checks:
+    name: Devcontainer CI
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Podman as Docker
+        uses: parkan/github-actions/setup-podman-docker@v2
+        with:
+          disable-docker: true
+          cache-storage: false  # Disabled until cache issues resolved
+
+      - name: Build devcontainer
+        id: build
+        uses: parkan/github-actions/devcontainer-build@v2
+        with:
+          workspace-folder: .
+          container-runtime: podman
+          container-id-label: ci=podman
+
+      # Fast surface checks and codegen first
+      - name: Generate swagger code
+        uses: parkan/github-actions/devcontainer-exec@v2
+        with:
+          container-id: ${{ steps.build.outputs.container-id }}
+          command: 'cd /workspaces/singularity && mkdir -p client/swagger/client && go install github.com/go-swagger/go-swagger/cmd/[email protected] && go generate ./client/swagger/...'
+          container-runtime: podman
+
+      - name: Check formatting
+        uses: parkan/github-actions/devcontainer-exec@v2
+        with:
+          container-id: ${{ steps.build.outputs.container-id }}
+          command: 'cd /workspaces/singularity && gofmt -l .'
+          container-runtime: podman
+
+      - name: Run go vet
+        uses: parkan/github-actions/devcontainer-exec@v2
+        with:
+          container-id: ${{ steps.build.outputs.container-id }}
+          command: 'cd /workspaces/singularity && go vet ./...'
+          container-runtime: podman
+
+      - name: Run staticcheck
+        uses: parkan/github-actions/devcontainer-exec@v2
+        with:
+          container-id: ${{ steps.build.outputs.container-id }}
+          command: 'cd /workspaces/singularity && staticcheck ./...'
+          container-runtime: podman
+
+      - name: Build binary
+        uses: parkan/github-actions/devcontainer-exec@v2
+        with:
+          container-id: ${{ steps.build.outputs.container-id }}
+          command: 'cd /workspaces/singularity && go build -o singularity .'
+          container-runtime: podman
+
+      - name: Run tests
+        uses: parkan/github-actions/devcontainer-exec@v2
+        with:
+          container-id: ${{ steps.build.outputs.container-id }}
+          command: 'cd /workspaces/singularity && go test -v ./...'
+          container-runtime: podman
+
+      - name: Run integration tests
+        uses: parkan/github-actions/devcontainer-exec@v2
+        with:
+          container-id: ${{ steps.build.outputs.container-id }}
+          command: 'cd /workspaces/singularity && SINGULARITY_TEST_INTEGRATION=true go test -v -timeout 20m -run "Integration" ./cmd/...'
+          container-runtime: podman
+
+      - name: Cleanup
+        if: always()
+        uses: parkan/github-actions/devcontainer-cleanup@v2
+        with:
+          container-id: ${{ steps.build.outputs.container-id }}
+          container-runtime: podman