Puberty commit

backend/config/config.go

@@ -0,0 +1,71 @@
+package config
+
+import (
+	"github.com/BurntSushi/toml"
+	"github.com/juju/errors"
+)
+
+// Config is used to provide configuration to the server.
+type Config struct {
+	LogDir   string `toml:"log_dir"`
+	Commands struct {
+		BasePath      string `toml:"base_path"`
+		ConfigCommand string `toml:"config_command"`
+	} `toml:"commands"`
+	Database struct {
+		Driver string `toml:"driver"`
+		Spec   string `toml:"spec"`
+	} `toml:"database"`
+	Server struct {
+		Host string `toml:"host"`
+		Port uint16 `toml:"port"`
+	} `toml:"server"`
+	Github struct {
+		ClientID     string `toml:"client_id"`
+		ClientSecret string `toml:"client_secret"`
+	} `toml:"github"`
+}
+
+var cfg *Config
+
+func Get() Config {
+	if cfg == nil {
+		panic("Config is not installed")
+	}
+	return *cfg
+}
+
+func Install(c Config) error {
+	switch {
+	case c.Commands.BasePath == "":
+		return errors.New("Base command path is not configured")
+	case c.Commands.ConfigCommand == "":
+		return errors.New("Config command is not configured")
+	case c.Database.Driver == "":
+		return errors.New("Database driver is not configured")
+	case c.Database.Spec == "":
+		return errors.New("Database spec is not configured")
+	case c.Server.Host == "":
+		return errors.New("Server host is not configured")
+	case c.Server.Port == 0:
+		return errors.New("Server port is not configured")
+	case c.Github.ClientID == "":
+		return errors.New("GitHub client ID is not configured")
+	case c.Github.ClientSecret == "":
+		return errors.New("GitHub client secret is not configured")
+	case c.LogDir == "":
+		return errors.New("Log directory is not configured")
+	default:
+		cfg = &c
+		return nil
+	}
+}
+
+func LoadFile(file string) (Config, error) {
+	var c Config
+	_, err := toml.DecodeFile(file, &c)
+	if err != nil {
+		return c, errors.Annotate(err, "Failed to parse config file")
+	}
+	return c, Install(c)
+}