feat: initial release

internal/config/config.go

@@ -0,0 +1,95 @@
+package config
+
+import (
+	"errors"
+	"fmt"
+	"os"
+
+	"git.wzray.com/homelab/mastermind/internal/types"
+	"github.com/BurntSushi/toml"
+)
+
+type Configs struct {
+	Master MasterConfig
+	Dns    DnsConfig
+	Host   HostConfig
+}
+
+type Config struct {
+	Node    NodeConfig
+	Configs Configs
+	Roles   []types.Role
+}
+
+func FromFile(filename string) (Config, error) {
+	data, err := os.ReadFile(filename)
+	if err != nil {
+		return Config{}, fmt.Errorf("read config file: %w", err)
+	}
+
+	var temp struct {
+		Node    NodeConfig `toml:"node"`
+		Configs struct {
+			Host   *HostConfig   `toml:"host"`
+			Dns    *DnsConfig    `toml:"dns"`
+			Master *MasterConfig `toml:"master"`
+		} `toml:"roles"`
+	}
+
+	if err := toml.Unmarshal(data, &temp); err != nil {
+		return Config{}, fmt.Errorf("parse config file: %w", err)
+	}
+
+	config := defaultConfig
+	config.Node.Merge(temp.Node)
+
+	if c := temp.Configs.Master; c != nil {
+		c.set = true
+		config.Roles = append(config.Roles, types.MasterRole)
+		config.Configs.Master.Merge(*c)
+	}
+
+	if c := temp.Configs.Dns; c != nil {
+		c.set = true
+		config.Roles = append(config.Roles, types.DnsRole)
+		config.Configs.Dns.Merge(*c)
+	}
+
+	if c := temp.Configs.Host; c != nil {
+		c.set = true
+		config.Roles = append(config.Roles, types.HostRole)
+		config.Configs.Host.Merge(*c)
+	}
+
+	return config, nil
+}
+
+func (c Config) Validate() error {
+	if err := c.Node.Validate(); err != nil {
+		return fmt.Errorf("node: %w", err)
+	}
+
+	if c.Configs.Host.set {
+		if err := c.Configs.Host.Validate(); err != nil {
+			return fmt.Errorf("configs.host: %w", err)
+		}
+	}
+
+	if c.Configs.Dns.set {
+		if err := c.Configs.Dns.Validate(); err != nil {
+			return fmt.Errorf("configs.dns: %w", err)
+		}
+	}
+
+	if c.Configs.Host.set {
+		if err := c.Configs.Master.Validate(); err != nil {
+			return fmt.Errorf("configs.master: %w", err)
+		}
+	}
+
+	if len(c.Roles) == 0 {
+		return errors.New("no roles configured")
+	}
+
+	return nil
+}