Initial commit

internal/config/config.go

@@ -0,0 +1,84 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+
+	"github.com/joho/godotenv"
+)
+
+type Config struct {
+	// Azure
+	AzureOrg string
+	AzurePAT string
+
+	// Forgejo
+	ForgejoURL   string
+	ForgejoToken string
+	ForgejoOwner string
+
+	// Migration
+	MirrorInterval string
+	Concurrent     int
+	DryRun         bool
+}
+
+var globalConfig *Config
+
+func Load(path string) error {
+	if err := godotenv.Load(path); err != nil {
+		// Try to load from environment if file doesn't exist
+		if !os.IsNotExist(err) {
+			return fmt.Errorf("error loading env file: %w", err)
+		}
+	}
+
+	concurrent := 3
+	if c := os.Getenv("CONCURRENT_MIGRATIONS"); c != "" {
+		if v, err := strconv.Atoi(c); err == nil {
+			concurrent = v
+		}
+	}
+
+	globalConfig = &Config{
+		AzureOrg:       getEnvOrError("AZURE_ORG"),
+		AzurePAT:       getEnvOrError("AZURE_PAT"),
+		ForgejoURL:     getEnvOrError("FORGEJO_URL"),
+		ForgejoToken:   getEnvOrError("FORGEJO_TOKEN"),
+		ForgejoOwner:   getEnvOrError("FORGEJO_OWNER"),
+		MirrorInterval: getEnv("MIRROR_INTERVAL", "8h"),
+		Concurrent:     concurrent,
+	}
+
+	return validate(globalConfig)
+}
+
+func Get() *Config {
+	return globalConfig
+}
+
+func getEnv(key, defaultValue string) string {
+	if value := os.Getenv(key); value != "" {
+		return value
+	}
+	return defaultValue
+}
+
+func getEnvOrError(key string) string {
+	value := os.Getenv(key)
+	if value == "" {
+		panic(fmt.Sprintf("Required environment variable %s is not set", key))
+	}
+	return value
+}
+
+func validate(c *Config) error {
+	if c.AzureOrg == "" || c.AzurePAT == "" {
+		return fmt.Errorf("Azure organization and PAT must be configured")
+	}
+	if c.ForgejoURL == "" || c.ForgejoToken == "" {
+		return fmt.Errorf("Forgejo URL and token must be configured")
+	}
+	return nil
+}