ci: Add MySQL and PostgreSQL for tests

They can be started using tests/utils/mysql.sh and tests/utils/postgresql.sh, respectively.
The commands print the socket path to stdout.

Author: jtojnar

flake.nix

@@ -65,6 +65,10 @@
 
             # Website generator.
             pkgs.zola
+
+            # Database servers for testing.
+            pkgs.mariadb
+            pkgs.postgresql
           ];
 
           # node-gyp wants some locales, let’s make them available through an environment variable.

tests/utils/mysql.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+
+DB_DIRECTORY=$(mktemp -d)
+SOCKET=$(mktemp -d)/mysqld.sock
+
+# Set up the server
+mkdir -p "$DB_DIRECTORY"
+chmod 750 "$DB_DIRECTORY"
+mysql_install_db --datadir="$DB_DIRECTORY" > /dev/stderr
+
+# Start the server
+mysqld_safe --datadir="$DB_DIRECTORY" --socket="$SOCKET" --skip-networking --no-auto-restart > /dev/stderr
+
+# Create users
+sleep 2 # Waiting does not seem to work.
+mysql --wait --socket="$SOCKET" -e "CREATE USER 'selfoss'@'localhost' IDENTIFIED BY 'password';" > /dev/stderr
+mysql --wait --socket="$SOCKET" -e "CREATE DATABASE selfoss;" > /dev/stderr
+mysql --wait --socket="$SOCKET" -e "GRANT ALL PRIVILEGES ON *.* TO 'selfoss'@'localhost';" > /dev/stderr
+
+echo "$SOCKET"
+
+echo 'Use `mysqladmin --socket="$SOCKET" shutdown` to stop the database server:' > /dev/stderr
+echo "mysqladmin --socket=\"$SOCKET\" shutdown" > /dev/stderr
+

tests/utils/postgresql.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+
+DB_DIRECTORY=$(mktemp -d)
+SOCKET_DIR=$(mktemp -d)
+
+postgresOptions=(
+	-k "$SOCKET_DIR"
+	-c "listen_addresses="
+)
+
+# Set up the server
+mkdir -p "$DB_DIRECTORY"
+chmod 750 "$DB_DIRECTORY"
+initdb "$DB_DIRECTORY" > /dev/stderr
+
+# Start the server
+pg_ctl start -D "$DB_DIRECTORY" -o "${postgresOptions[*]}" > /dev/stderr # Intentionally passing options as a string
+
+# Create users
+# Using a “template1” database since it is guaranteed to be present.
+psql -h "$SOCKET_DIR" -d template1 -tAc 'CREATE USER "selfoss"' > /dev/stderr
+psql -h "$SOCKET_DIR" -d template1 -tAc 'CREATE DATABASE "selfoss" WITH OWNER = "selfoss"' > /dev/stderr
+
+echo "$SOCKET_DIR"
+
+echo 'Use `pg_ctl stop -D "$(psql -h "$SOCKET_DIR" -d template1 -tAc "SHOW data_directory;")"` to stop the database server:' > /dev/stderr
+echo "pg_ctl stop -D \"$DB_DIRECTORY\"" > /dev/stderr