refactor: remove the `config` global

config/config.go

@@ -10,7 +10,6 @@ import (
 	"path/filepath"
 	"strconv"
 	"strings"
-	"sync"
 	"time"
 
 	"github.com/miekg/dns"
@@ -385,17 +384,8 @@ func WithDefaults[T any]() (T, error) {
 	return cfg, nil
 }
 
-//nolint:gochecknoglobals
-var (
-	config  = &Config{}
-	cfgLock sync.RWMutex
-)
-
 // LoadConfig creates new config from YAML file or a directory containing YAML files
 func LoadConfig(path string, mandatory bool) (rCfg *Config, rerr error) {
-	cfgLock.Lock()
-	defer cfgLock.Unlock()
-
 	cfg, err := WithDefaults[Config]()
 	if err != nil {
 		return nil, err
@@ -404,9 +394,6 @@ func LoadConfig(path string, mandatory bool) (rCfg *Config, rerr error) {
 	defer func() {
 		if rerr == nil {
 			util.LogPrivacy.Store(rCfg.Log.Privacy)
-
-			// We're still holding the lock
-			config = rCfg
 		}
 	}()
 

config/config_test.go

@@ -19,6 +19,8 @@ import (
 
 var _ = Describe("Config", func() {
 	var (
+		c *Config
+
 		tmpDir *helpertest.TmpFolder
 		err    error
 	)
@@ -32,9 +34,9 @@ var _ = Describe("Config", func() {
 	})
 
 	Describe("Deprecated parameters are converted", func() {
-		var c Config
 		BeforeEach(func() {
-			err := defaults.Set(&c)
+			c = new(Config)
+			err := defaults.Set(c)
 			Expect(err).Should(Succeed())
 		})
 
@@ -149,10 +151,10 @@ var _ = Describe("Config", func() {
 				confFile := writeConfigYml(tmpDir)
 				Expect(confFile.Error).Should(Succeed())
 
-				_, err = LoadConfig(confFile.Path, true)
+				c, err = LoadConfig(confFile.Path, true)
 				Expect(err).Should(Succeed())
 
-				defaultTestFileConfig()
+				defaultTestFileConfig(c)
 			})
 		})
 		When("Test file does not exist", func() {
@@ -169,7 +171,7 @@ var _ = Describe("Config", func() {
 				_, err := LoadConfig(tmpDir.Path, true)
 				Expect(err).Should(Succeed())
 
-				defaultTestFileConfig()
+				defaultTestFileConfig(c)
 			})
 
 			It("should ignore non YAML files", func() {
@@ -204,7 +206,7 @@ var _ = Describe("Config", func() {
 				cfgFile := tmpDir.CreateStringFile("config.yml", "malformed_config")
 				Expect(cfgFile.Error).Should(Succeed())
 
-				_, err = LoadConfig(cfgFile.Path, true)
+				c, err = LoadConfig(cfgFile.Path, true)
 				Expect(err).Should(HaveOccurred())
 				Expect(err.Error()).Should(ContainSubstring("wrong file structure"))
 			})
@@ -323,16 +325,16 @@ bootstrapDns:
 
 		When("config directory does not exist", func() {
 			It("should return error", func() {
-				_, err = LoadConfig(tmpDir.JoinPath("config.yml"), true)
+				c, err = LoadConfig(tmpDir.JoinPath("config.yml"), true)
 				Expect(err).Should(HaveOccurred())
 				Expect(err.Error()).Should(ContainSubstring("no such file or directory"))
 			})
 
 			It("should use default config if config is not mandatory", func() {
-				_, err = LoadConfig(tmpDir.JoinPath("config.yml"), false)
+				c, err = LoadConfig(tmpDir.JoinPath("config.yml"), false)
 
 				Expect(err).Should(Succeed())
-				Expect(config.Log.Level).Should(Equal(log.LevelInfo))
+				Expect(c.Log.Level).Should(Equal(log.LevelInfo))
 			})
 		})
 	})
@@ -768,7 +770,7 @@ bootstrapDns:
 	})
 })
 
-func defaultTestFileConfig() {
+func defaultTestFileConfig(config *Config) {
 	Expect(config.Ports.DNS).Should(Equal(ListenConfig{"55553", ":55554", "[::1]:55555"}))
 	Expect(config.Upstreams.StartVerify).Should(BeFalse())
 	Expect(config.Upstreams.UserAgent).Should(Equal("testBlocky"))