Initial commit

cmd/cli/config.go

@@ -0,0 +1,61 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+
+	"gardomatic.kleiax.de/internal/mailer"
+)
+
+type config struct {
+	dsn         string
+	environment string
+	webBaseURL  string
+	json        bool
+	yes         bool
+	mail        mailer.Config
+}
+
+func configFromEnvironment() (config, error) {
+	port, err := envInt("GARDOMATIC_SMTP_PORT", 25)
+	if err != nil {
+		return config{}, err
+	}
+
+	return config{
+		dsn:         os.Getenv("GARDOMATIC_DB_DSN"),
+		environment: envString("GARDOMATIC_ENV", "development"),
+		webBaseURL:  envString("GARDOMATIC_WEB_BASE_URL", "http://localhost:4040"),
+		mail: mailer.Config{
+			Mode:     mailer.Mode(envString("GARDOMATIC_SMTP_MODE", string(mailer.ModeFile))),
+			Host:     os.Getenv("GARDOMATIC_SMTP_HOST"),
+			Port:     port,
+			Username: os.Getenv("GARDOMATIC_SMTP_USERNAME"),
+			Password: os.Getenv("GARDOMATIC_SMTP_PASSWORD"),
+			Sender:   envString("GARDOMATIC_SMTP_SENDER", "gardomatic@localhost"),
+			FilePath: envString("GARDOMATIC_SMTP_FILE_PATH", "/tmp/gardomatic-mails.log"),
+		},
+	}, nil
+}
+
+func envString(name, fallback string) string {
+	if value := strings.TrimSpace(os.Getenv(name)); value != "" {
+		return value
+	}
+	return fallback
+}
+
+func envInt(name string, fallback int) (int, error) {
+	value := strings.TrimSpace(os.Getenv(name))
+	if value == "" {
+		return fallback, nil
+	}
+
+	n, err := strconv.Atoi(value)
+	if err != nil {
+		return 0, fmt.Errorf("%s must be an integer: %w", name, err)
+	}
+	return n, nil
+}