Add the prefixed environment variables to avoid potential conflicts.

main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"os"
 	"strings"
 
 	"github.com/gookit/goutil/envutil"
@@ -11,47 +12,67 @@ import (
 
 var cfg *config
 
+// function get value from the env where the value can be anything
+func getDetailsFromEnv[T any](key string, defaultValue T) T {
+	var result any
+	if _, ok := os.LookupEnv("GMP_" + key); ok {
+		key = "GMP_" + key
+	}
+	switch v := any(defaultValue).(type) {
+	case string:
+		result = envutil.Getenv(key, v)
+	case int:
+		result = envutil.GetInt(key, v)
+	case bool:
+		result = envutil.GetBool(key, v)
+	default:
+		result = defaultValue
+	}
+	return result.(T)
+}
+
 func parseConfig() {
 	libpack_config.PKG_NAME = "graphql_proxy"
 	c := config{}
-	c.Server.PortGraphQL = envutil.GetInt("PORT_GRAPHQL", 8080)
-	c.Server.PortMonitoring = envutil.GetInt("MONITORING_PORT", 9393)
-	c.Server.HostGraphQL = envutil.Getenv("HOST_GRAPHQL", "http://localhost/")
-	c.Client.JWTUserClaimPath = envutil.Getenv("JWT_USER_CLAIM_PATH", "")
-	c.Client.JWTRoleClaimPath = envutil.Getenv("JWT_ROLE_CLAIM_PATH", "")
-	c.Client.RoleFromHeader = envutil.Getenv("ROLE_FROM_HEADER", "")
-	c.Client.RoleRateLimit = envutil.GetBool("ROLE_RATE_LIMIT", false)
-	c.Cache.CacheEnable = envutil.GetBool("ENABLE_GLOBAL_CACHE", false)
-	c.Cache.CacheTTL = envutil.GetInt("CACHE_TTL", 60)
-	c.Security.BlockIntrospection = envutil.GetBool("BLOCK_SCHEMA_INTROSPECTION", false)
+	c.Server.PortGraphQL = getDetailsFromEnv("PORT_GRAPHQL", 8080)
+	c.Server.PortMonitoring = getDetailsFromEnv("MONITORING_PORT", 9393)
+	c.Server.HostGraphQL = getDetailsFromEnv("HOST_GRAPHQL", "http://localhost/")
+	c.Client.JWTUserClaimPath = getDetailsFromEnv("JWT_USER_CLAIM_PATH", "")
+	c.Client.JWTRoleClaimPath = getDetailsFromEnv("JWT_ROLE_CLAIM_PATH", "")
+	c.Client.RoleFromHeader = getDetailsFromEnv("ROLE_FROM_HEADER", "")
+	c.Client.RoleRateLimit = getDetailsFromEnv("ROLE_RATE_LIMIT", false)
+	c.Cache.CacheEnable = getDetailsFromEnv("ENABLE_GLOBAL_CACHE", false)
+	c.Cache.CacheTTL = getDetailsFromEnv("CACHE_TTL", 60)
+	c.Security.BlockIntrospection = getDetailsFromEnv("BLOCK_SCHEMA_INTROSPECTION", false)
 	c.Security.IntrospectionAllowed = func() []string {
-		urls := envutil.Getenv("ALLOWED_INTROSPECTION", "")
+		urls := getDetailsFromEnv("ALLOWED_INTROSPECTION", "")
 		if urls == "" {
 			return nil
 		}
 		return strings.Split(urls, ",")
 	}()
 	c.Logger = libpack_logging.NewLogger()
-	c.Server.HealthcheckGraphQL = envutil.Getenv("HEALTHCHECK_GRAPHQL_URL", "")
+	c.Server.HealthcheckGraphQL = getDetailsFromEnv("HEALTHCHECK_GRAPHQL_URL", "")
 	c.Client.GQLClient = graphql.NewConnection()
 	c.Client.GQLClient.SetEndpoint(c.Server.HealthcheckGraphQL)
-	c.Server.AccessLog = envutil.GetBool("ENABLE_ACCESS_LOG", false)
-	c.Server.ReadOnlyMode = envutil.GetBool("READ_ONLY_MODE", false)
+	c.Server.AccessLog = getDetailsFromEnv("ENABLE_ACCESS_LOG", false)
+	c.Server.ReadOnlyMode = getDetailsFromEnv("READ_ONLY_MODE", false)
 	c.Server.AllowURLs = func() []string {
-		urls := envutil.Getenv("ALLOWED_URLS", "")
+		urls := getDetailsFromEnv("ALLOWED_URLS", "")
 		if urls == "" {
 			return nil
 		}
 		return strings.Split(urls, ",")
 	}()
-	c.Client.ClientTimeout = envutil.GetInt("PROXIED_CLIENT_TIMEOUT", 120)
+	c.Client.ClientTimeout = getDetailsFromEnv("PROXIED_CLIENT_TIMEOUT", 120)
 	c.Client.FastProxyClient = createFasthttpClient(c.Client.ClientTimeout)
-	c.Server.EnableApi = envutil.GetBool("ENABLE_API", false)
-	c.Server.ApiPort = envutil.GetInt("API_PORT", 9090)
-	c.Api.BannedUsersFile = envutil.Getenv("BANNED_USERS_FILE", "/go/src/app/banned_users.json")
-	c.Server.PurgeOnCrawl = envutil.GetBool("PURGE_METRICS_ON_CRAWL", false)
-	c.Server.PurgeEvery = envutil.GetInt("PURGE_METRICS_ON_TIMER", 0)
+	c.Server.EnableApi = getDetailsFromEnv("ENABLE_API", false)
+	c.Server.ApiPort = getDetailsFromEnv("API_PORT", 9090)
+	c.Api.BannedUsersFile = getDetailsFromEnv("BANNED_USERS_FILE", "/go/src/app/banned_users.json")
+	c.Server.PurgeOnCrawl = getDetailsFromEnv("PURGE_METRICS_ON_CRAWL", false)
+	c.Server.PurgeEvery = getDetailsFromEnv("PURGE_METRICS_ON_TIMER", 0)
 	cfg = &c
+
 	enableCache() // takes close to no resources, but can be used with dynamic query cache
 	loadRatelimitConfig()
 	enableApi()