3914d2e0b6
- Remove 'trap ... EXIT' that kills services when entering the dev shell - Fix DATABASE_URL: $USER → $USER (no backslash) so bash expands it instead of passing the literal string 'USER' as the PG role name
326 lines
9.5 KiB
Nix
326 lines
9.5 KiB
Nix
{
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lib,
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stdenv,
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mkShell,
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writeShellScriptBin,
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# Elixir/Erlang
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elixir,
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# Databases and caches
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postgresql_16,
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redis,
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# SNMP tools
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net-snmp,
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# Build tools for C NIF
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gcc,
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gnumake,
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pkg-config,
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# Development tools
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git-lfs,
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inotify-tools,
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# LSPs and formatters
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elixir-ls,
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nixfmt,
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shellcheck,
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# Pre-commit hooks
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pre-commit-hooks,
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}:
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let
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# PostgreSQL with TimescaleDB extension
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pg = postgresql_16.withPackages (ps: [ ps.timescaledb ]);
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# PostgreSQL data directory (local to project)
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pgDataDir = ".nix-postgres";
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pgPort = "5432";
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pgHost = "localhost";
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# Redis data directory (local to project)
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redisDataDir = ".nix-redis";
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redisPort = "6379";
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# Service management flag
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servicesFlag = ".nix-services-started";
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# Script to start PostgreSQL and Redis
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startServices = writeShellScriptBin "start-services" ''
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set -e
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echo "🚀 Starting development services..."
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# Check if already started
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if [ -f "${servicesFlag}" ]; then
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echo "✓ Services already running (remove ${servicesFlag} to force restart)"
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exit 0
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fi
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# Initialize PostgreSQL if needed
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if [ ! -d "${pgDataDir}" ]; then
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echo "📦 Initializing PostgreSQL database..."
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${pg}/bin/initdb -D ${pgDataDir} -U $USER --encoding=UTF8 --locale=en_US.UTF-8
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# Configure PostgreSQL
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cat >> ${pgDataDir}/postgresql.conf << EOF
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# Development configuration
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max_connections = 100
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shared_buffers = 128MB
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fsync = off # Faster for development (DO NOT use in production)
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synchronous_commit = off
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full_page_writes = off
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# TimescaleDB
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shared_preload_libraries = 'timescaledb'
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timescaledb.telemetry_level = off
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EOF
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fi
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# Check if PostgreSQL is already running on this port
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if ${pg}/bin/pg_isready -h ${pgHost} -p ${pgPort} > /dev/null 2>&1; then
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echo "✓ PostgreSQL already running on port ${pgPort}"
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else
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# Start PostgreSQL
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echo "🐘 Starting PostgreSQL on port ${pgPort}..."
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${pg}/bin/pg_ctl -D ${pgDataDir} -l ${pgDataDir}/logfile -o "-p ${pgPort}" start
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# Wait for PostgreSQL to be ready
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for i in {1..30}; do
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if ${pg}/bin/pg_isready -h ${pgHost} -p ${pgPort} > /dev/null 2>&1; then
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break
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fi
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if [ $i -eq 30 ]; then
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echo "❌ PostgreSQL failed to start within 30 seconds"
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echo " Check ${pgDataDir}/logfile for details"
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exit 1
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fi
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sleep 1
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done
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echo "✓ PostgreSQL started successfully"
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fi
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# Create postgres role if it doesn't exist (needed by some tools)
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${pg}/bin/psql -h ${pgHost} -p ${pgPort} -U $USER -d postgres -tc \
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"SELECT 1 FROM pg_roles WHERE rolname='postgres'" | grep -q 1 || \
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${pg}/bin/psql -h ${pgHost} -p ${pgPort} -U $USER -d postgres -c \
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"CREATE ROLE postgres WITH SUPERUSER LOGIN;"
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# Create development and test databases
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for db in towerops_dev towerops_test; do
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${pg}/bin/psql -h ${pgHost} -p ${pgPort} -U $USER -d postgres -tc \
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"SELECT 1 FROM pg_database WHERE datname='$db'" | grep -q 1 || \
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${pg}/bin/createdb -h ${pgHost} -p ${pgPort} -U $USER $db
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done
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# Enable TimescaleDB extension for dev and test databases
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for db in towerops_dev towerops_test; do
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${pg}/bin/psql -h ${pgHost} -p ${pgPort} -U $USER -d $db -c \
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"CREATE EXTENSION IF NOT EXISTS timescaledb CASCADE;" 2>/dev/null || \
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echo "⚠️ TimescaleDB not available for $db (optional)"
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done
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echo "✓ PostgreSQL started successfully"
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# Check if Redis is already running on this port
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if ${redis}/bin/redis-cli -p ${redisPort} ping > /dev/null 2>&1; then
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echo "✓ Redis already running on port ${redisPort}"
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else
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# Start Redis
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echo "📮 Starting Redis on port ${redisPort}..."
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mkdir -p ${redisDataDir}
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${redis}/bin/redis-server --daemonize yes \
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--port ${redisPort} \
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--dir ${redisDataDir} \
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--save "" \
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--appendonly no
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# Wait for Redis to be ready
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for i in {1..10}; do
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if ${redis}/bin/redis-cli -p ${redisPort} ping > /dev/null 2>&1; then
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break
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fi
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if [ $i -eq 10 ]; then
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echo "❌ Redis failed to start within 10 seconds"
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exit 1
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fi
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sleep 1
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done
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echo "✓ Redis started successfully"
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fi
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# Mark services as started
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touch ${servicesFlag}
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echo ""
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echo "✨ Development environment ready!"
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echo ""
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echo "PostgreSQL: ${pgHost}:${pgPort} (databases: towerops_dev, towerops_test)"
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echo "Redis: ${pgHost}:${redisPort}"
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echo ""
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'';
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# Script to stop PostgreSQL and Redis
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stopServices = writeShellScriptBin "stop-services" ''
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set -e
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echo "🛑 Stopping development services..."
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# Stop PostgreSQL
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if [ -d "${pgDataDir}" ]; then
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${pg}/bin/pg_ctl -D ${pgDataDir} stop -m fast 2>/dev/null || true
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echo "✓ PostgreSQL stopped"
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fi
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# Stop Redis
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${redis}/bin/redis-cli -p ${redisPort} shutdown 2>/dev/null || true
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echo "✓ Redis stopped"
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# Remove services flag
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rm -f ${servicesFlag}
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echo "✓ Services stopped successfully"
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'';
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# Pre-commit hooks configuration
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pre-commit-check = pre-commit-hooks.run {
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src = ../.;
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hooks = {
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# Elixir formatting
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mix-format = {
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enable = true;
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name = "mix format";
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entry = "mix format --check-formatted";
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files = "\\.(ex|exs)$";
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pass_filenames = false;
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};
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# Credo linting
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credo = {
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enable = true;
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name = "credo";
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entry = "mix credo --strict";
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files = "\\.(ex|exs)$";
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pass_filenames = false;
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};
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# Nix formatting
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nixfmt = {
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enable = true;
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entry = "${nixfmt}/bin/nixfmt";
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};
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# Shellcheck for shell scripts
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shellcheck.enable = true;
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};
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};
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in
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mkShell {
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name = "towerops-dev";
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# Development tools
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buildInputs = [
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# Elixir/Erlang
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elixir
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# Databases (PostgreSQL with TimescaleDB)
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pg
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redis
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# SNMP tools
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net-snmp
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# C NIF build tools
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gcc
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gnumake
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pkg-config
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# Development tools
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git-lfs
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# LSPs and formatters
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elixir-ls
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nixfmt
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shellcheck
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# Service management scripts
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startServices
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stopServices
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]
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++ lib.optionals stdenv.isLinux [
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# Linux-only tools
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inotify-tools # For Mix file watching
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];
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# Environment variables
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shellHook = ''
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# Color codes
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GREEN='\033[0;32m'
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BLUE='\033[0;34m'
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NC='\033[0m' # No Color
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# Set Mix and Hex home to local directories (avoid polluting $HOME)
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export MIX_HOME="$PWD/.nix-mix"
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export HEX_HOME="$PWD/.nix-hex"
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mkdir -p "$MIX_HOME" "$HEX_HOME"
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# PostgreSQL connection
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export PGHOST="${pgHost}"
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export PGPORT="${pgPort}"
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export PGUSER="$USER"
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export DATABASE_URL="ecto://$USER@${pgHost}:${pgPort}/towerops_dev"
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# Redis connection
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export REDIS_URL="redis://${pgHost}:${redisPort}/0"
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# Development secrets (DO NOT use in production)
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export SECRET_KEY_BASE="dev_secret_key_base_at_least_64_bytes_long_for_phoenix_to_accept_it_safely"
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export CLOAK_KEY="nQWmgQYhoCNXA3PAxwriKxLyPHAOWH9VgpLkBOXrowM="
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export RELEASE_COOKIE="dev_release_cookie_for_distributed_erlang"
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# Development environment
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export MIX_ENV=dev
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export PHX_HOST=localhost
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export PORT=4000
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# Ensure Erlang can find NIF libraries
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export ERL_AFLAGS="-kernel shell_history enabled"
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# Install Hex and Rebar3 if not already installed
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mix local.hex --force --if-missing > /dev/null 2>&1
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mix local.rebar --force --if-missing > /dev/null 2>&1
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# Auto-start services on first shell entry
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if [ ! -f "${servicesFlag}" ]; then
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${startServices}/bin/start-services
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# Run migrations if databases exist and Mix deps are available
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if [ -d "deps" ] && mix ecto.migrate 2>/dev/null; then
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echo "✓ Database migrations applied"
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fi
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fi
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# Install pre-commit hooks
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${pre-commit-check.shellHook}
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# Welcome message
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echo ""
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echo -e "''${BLUE}╔═══════════════════════════════════════════════════════════╗''${NC}"
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echo -e "''${BLUE}║ ║''${NC}"
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echo -e "''${BLUE}║''${NC} ''${GREEN}Towerops Development Environment''${NC} ''${BLUE}║''${NC}"
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echo -e "''${BLUE}║ ║''${NC}"
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echo -e "''${BLUE}╚═══════════════════════════════════════════════════════════╝''${NC}"
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echo ""
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echo -e "''${GREEN}Available commands:''${NC}"
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echo " mix phx.server - Start Phoenix development server"
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echo " mix test - Run test suite"
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echo " mix precommit - Run pre-commit checks (format, credo, test)"
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echo " start-services - Start PostgreSQL and Redis"
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echo " stop-services - Stop PostgreSQL and Redis"
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echo " mix ecto.reset - Reset database (drop, create, migrate, seed)"
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echo ""
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echo -e "''${GREEN}Services:''${NC}"
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echo " PostgreSQL: ${pgHost}:${pgPort}"
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echo " Redis: ${pgHost}:${redisPort}"
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echo ""
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echo -e "''${GREEN}Documentation:''${NC}"
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echo " See CLAUDE.md and docs/nix.md for more information"
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echo ""
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'';
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}
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