Odoo ERP ported to Go — complete backend + original OWL frontend

Full port of Odoo's ERP system from Python to Go, with the original
Odoo JavaScript frontend (OWL framework) running against the Go server.

Backend (10,691 LoC Go):
- Custom ORM: CRUD, domains→SQL with JOINs, computed fields, sequences
- 93 models across 14 modules (base, account, sale, stock, purchase, hr,
  project, crm, fleet, product, l10n_de, google_address/translate/calendar)
- Auth with bcrypt + session cookies
- Setup wizard (company, SKR03 chart, admin, demo data)
- Double-entry bookkeeping constraint
- Sale→Invoice workflow (confirm SO → generate invoice → post)
- SKR03 chart of accounts (110 accounts) + German taxes (USt/VSt)
- Record rules (multi-company filter)
- Google integrations as opt-in modules (Maps, Translate, Calendar)

Frontend:
- Odoo's original OWL webclient (503 JS modules, 378 XML templates)
- JS transpiled via Odoo's js_transpiler (ES modules → odoo.define)
- SCSS compiled to CSS (675KB) via dart-sass
- XML templates compiled to registerTemplate() JS calls
- Static file serving from Odoo source addons
- Login page, session management, menu navigation
- Contacts list view renders with real data from PostgreSQL

Infrastructure:
- 14MB single binary (CGO_ENABLED=0)
- Docker Compose (Go server + PostgreSQL 16)
- Zero phone-home (no outbound calls to odoo.com)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pkg/tools/config.go

@@ -0,0 +1,116 @@
+// Package tools provides configuration and utility functions.
+// Mirrors: odoo/tools/config.py
+package tools
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+)
+
+// Config holds the server configuration.
+// Mirrors: odoo/tools/config.py configmanager
+type Config struct {
+	// Database
+	DBHost     string
+	DBPort     int
+	DBUser     string
+	DBPassword string
+	DBName     string
+	DBSSLMode  string
+
+	// Server
+	HTTPInterface string
+	HTTPPort      int
+	Workers       int
+	DataDir       string
+
+	// Modules
+	AddonsPath     []string
+	OdooAddonsPath []string // Paths to Odoo source addon directories (for static files)
+	BuildDir       string   // Directory for compiled assets (SCSS→CSS)
+	WithoutDemo    bool
+
+	// Logging
+	LogLevel string
+
+	// Limits
+	LimitMemorySoft int64
+	LimitTimeReal   int
+}
+
+// DefaultConfig returns a configuration with default values.
+// Mirrors: odoo/tools/config.py _default_options
+func DefaultConfig() *Config {
+	return &Config{
+		DBHost:        "localhost",
+		DBPort:        5432,
+		DBUser:        "odoo",
+		DBPassword:    "odoo",
+		DBName:        "odoo",
+		DBSSLMode:     "disable",
+		HTTPInterface: "0.0.0.0",
+		HTTPPort:      8069,
+		Workers:       0,
+		DataDir:       "/var/lib/odoo",
+		LogLevel:      "info",
+	}
+}
+
+// LoadFromEnv overrides config values from environment variables.
+// Mirrors: odoo/tools/config.py _env_options (ODOO_* prefix)
+func (c *Config) LoadFromEnv() {
+	if v := os.Getenv("ODOO_DB_HOST"); v != "" {
+		c.DBHost = v
+	}
+	// Also support Docker-style env vars (HOST, USER, PASSWORD)
+	if v := os.Getenv("HOST"); v != "" {
+		c.DBHost = v
+	}
+	if v := os.Getenv("ODOO_DB_PORT"); v != "" {
+		if port, err := strconv.Atoi(v); err == nil {
+			c.DBPort = port
+		}
+	}
+	if v := os.Getenv("ODOO_DB_USER"); v != "" {
+		c.DBUser = v
+	}
+	if v := os.Getenv("USER"); v != "" && os.Getenv("ODOO_DB_USER") == "" {
+		c.DBUser = v
+	}
+	if v := os.Getenv("ODOO_DB_PASSWORD"); v != "" {
+		c.DBPassword = v
+	}
+	if v := os.Getenv("PASSWORD"); v != "" && os.Getenv("ODOO_DB_PASSWORD") == "" {
+		c.DBPassword = v
+	}
+	if v := os.Getenv("ODOO_DB_NAME"); v != "" {
+		c.DBName = v
+	}
+	if v := os.Getenv("ODOO_HTTP_PORT"); v != "" {
+		if port, err := strconv.Atoi(v); err == nil {
+			c.HTTPPort = port
+		}
+	}
+	if v := os.Getenv("ODOO_DATA_DIR"); v != "" {
+		c.DataDir = v
+	}
+	if v := os.Getenv("ODOO_LOG_LEVEL"); v != "" {
+		c.LogLevel = v
+	}
+	if v := os.Getenv("ODOO_ADDONS_PATH"); v != "" {
+		c.OdooAddonsPath = strings.Split(v, ",")
+	}
+	if v := os.Getenv("ODOO_BUILD_DIR"); v != "" {
+		c.BuildDir = v
+	}
+}
+
+// DSN returns the PostgreSQL connection string.
+func (c *Config) DSN() string {
+	return fmt.Sprintf(
+		"postgres://%s:%s@%s:%d/%s?sslmode=%s",
+		c.DBUser, c.DBPassword, c.DBHost, c.DBPort, c.DBName, c.DBSSLMode,
+	)
+}