server: fix interceptConfigs (#8641)

* server: fix interceptConfigs

* cl++

* revert call

* update error message

* revise TestInterceptConfigsPreRunHandlerDoesNotMixConfigFiles

* remove TestInterceptConfigsPreRunHandlerDoesNotMixConfigFiles

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

CHANGELOG.md

@@ -64,6 +64,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (x/evidence) [#8461](https://github.com/cosmos/cosmos-sdk/pull/8461) Fix bech32 prefix in evidence validator address conversion
 * (x/slashing) [\#8427](https://github.com/cosmos/cosmos-sdk/pull/8427) Fix query signing infos command
 * (server) [\#8399](https://github.com/cosmos/cosmos-sdk/pull/8399) fix gRPC-web flag default value
+* (server) [\#8641](https://github.com/cosmos/cosmos-sdk/pull/8641) Fix Tendermint and application configuration reading from file
 
 ## [v0.41.1](https://github.com/cosmos/cosmos-sdk/releases/tag/v0.41.1) - 2021-02-17
 

server/util.go

@@ -184,11 +184,11 @@ func SetCmdServerContext(cmd *cobra.Command, serverCtx *Context) error {
 func interceptConfigs(rootViper *viper.Viper) (*tmcfg.Config, error) {
 	rootDir := rootViper.GetString(flags.FlagHome)
 	configPath := filepath.Join(rootDir, "config")
-	configFile := filepath.Join(configPath, "config.toml")
+	tmCfgFile := filepath.Join(configPath, "config.toml")
 
 	conf := tmcfg.DefaultConfig()
 
-	switch _, err := os.Stat(configFile); {
+	switch _, err := os.Stat(tmCfgFile); {
 	case os.IsNotExist(err):
 		tmcfg.EnsureRoot(rootDir)
 
@@ -200,7 +200,7 @@ func interceptConfigs(rootViper *viper.Viper) (*tmcfg.Config, error) {
 		conf.P2P.RecvRate = 5120000
 		conf.P2P.SendRate = 5120000
 		conf.Consensus.TimeoutCommit = 5 * time.Second
-		tmcfg.WriteConfigFile(configFile, conf)
+		tmcfg.WriteConfigFile(tmCfgFile, conf)
 
 	case err != nil:
 		return nil, err
@@ -209,34 +209,37 @@ func interceptConfigs(rootViper *viper.Viper) (*tmcfg.Config, error) {
 		rootViper.SetConfigType("toml")
 		rootViper.SetConfigName("config")
 		rootViper.AddConfigPath(configPath)
+
 		if err := rootViper.ReadInConfig(); err != nil {
-			return nil, fmt.Errorf("failed to read in config.toml: %w", err)
+			return nil, fmt.Errorf("failed to read in %s: %w", tmCfgFile, err)
 		}
 	}
 
-	// Read into the configuration whatever data the viper instance has for it
-	// This may come from the configuration file above but also any of the other sources
-	// viper uses
+	// Read into the configuration whatever data the viper instance has for it.
+	// This may come from the configuration file above but also any of the other
+	// sources viper uses.
 	if err := rootViper.Unmarshal(conf); err != nil {
 		return nil, err
 	}
+
 	conf.SetRoot(rootDir)
 
-	appConfigFilePath := filepath.Join(configPath, "app.toml")
-	if _, err := os.Stat(appConfigFilePath); os.IsNotExist(err) {
+	appCfgFilePath := filepath.Join(configPath, "app.toml")
+	if _, err := os.Stat(appCfgFilePath); os.IsNotExist(err) {
 		appConf, err := config.ParseConfig(rootViper)
 		if err != nil {
-			return nil, fmt.Errorf("failed to parse app.toml: %w", err)
+			return nil, fmt.Errorf("failed to parse %s: %w", appCfgFilePath, err)
 		}
 
-		config.WriteConfigFile(appConfigFilePath, appConf)
+		config.WriteConfigFile(appCfgFilePath, appConf)
 	}
 
 	rootViper.SetConfigType("toml")
 	rootViper.SetConfigName("app")
 	rootViper.AddConfigPath(configPath)
-	if err := rootViper.ReadInConfig(); err != nil {
-		return nil, fmt.Errorf("failed to read in app.toml: %w", err)
+
+	if err := rootViper.MergeInConfig(); err != nil {
+		return nil, fmt.Errorf("failed to merge configuration: %w", err)
 	}
 
 	return conf, nil

server/util_test.go

@@ -162,76 +162,6 @@ func TestInterceptConfigsPreRunHandlerReadsAppToml(t *testing.T) {
 	}
 }
 
-func TestInterceptConfigsPreRunHandlerDoesNotMixConfigFiles(t *testing.T) {
-	// The goal of this test is to make sure that app.toml and config.toml
-	// are separate files and that mixing values does not work
-	const testDbBackend = "awesome_test_db"
-	const testHaltTime = 1337
-	const testHaltHeight = 2001
-
-	tempDir := t.TempDir()
-	err := os.Mkdir(path.Join(tempDir, "config"), os.ModePerm)
-	if err != nil {
-		t.Fatalf("creating config dir failed: %v", err)
-	}
-	configTomlPath := path.Join(tempDir, "config", "config.toml")
-	writer, err := os.Create(configTomlPath)
-	if err != nil {
-		t.Fatalf("creating config.toml file failed: %v", err)
-	}
-
-	// Put a value in config.toml that should be in app.toml
-	_, err = writer.WriteString(fmt.Sprintf("halt-time = %d\ndb_backend = \"%s\"\n", testHaltTime, testDbBackend))
-	if err != nil {
-		t.Fatalf("Failed writing string to config.toml: %v", err)
-	}
-
-	if err := writer.Close(); err != nil {
-		t.Fatalf("Failed closing config.toml: %v", err)
-	}
-
-	appTomlPath := path.Join(tempDir, "config", "app.toml")
-	writer, err = os.Create(appTomlPath)
-	if err != nil {
-		t.Fatalf("creating app.toml file failed %v", err)
-	}
-
-	// Put a different value in app.toml
-	_, err = writer.WriteString(fmt.Sprintf("halt-height = %d\n", testHaltHeight))
-	if err != nil {
-		t.Fatalf("Failed writing string to app.toml: %v", err)
-	}
-
-	if err := writer.Close(); err != nil {
-		t.Fatalf("Failed closing app.toml: %v", err)
-	}
-
-	cmd := StartCmd(nil, tempDir)
-	cmd.PreRunE = preRunETestImpl
-
-	serverCtx := &Context{}
-	ctx := context.WithValue(context.Background(), ServerContextKey, serverCtx)
-
-	if err := cmd.ExecuteContext(ctx); err != CancelledInPreRun {
-		t.Fatalf("function failed with [%T] %v", err, err)
-	}
-
-	// check that the intended value from config.toml is used
-	if testDbBackend != serverCtx.Config.DBBackend {
-		t.Error("DBPath was not set from config.toml")
-	}
-
-	// The value from app.toml should be used for this
-	if testHaltHeight != serverCtx.Viper.GetInt("halt-height") {
-		t.Error("Halt height is not using provided value")
-	}
-
-	// The value from config.toml should not be used, default is used instead
-	if 0 != serverCtx.Viper.GetInt("halt-time") {
-		t.Error("Halt time is not using default")
-	}
-}
-
 func TestInterceptConfigsPreRunHandlerReadsFlags(t *testing.T) {
 	const testAddr = "tcp://127.1.2.3:12345"
 	tempDir := t.TempDir()