Remove gaia (#4347)

Gaia is removed from cosmos-sdk repository.

Few changes were required to make sure no packages depend on gaia subpackages.

CI config is amended accordingly.

Unnecessary targets are removed from Makefile.

Simulations run through a lightweight version of gaia renamed to simapp.

Closes: #4104

server/config/toml.go

@@ -27,13 +27,14 @@ var configTemplate *template.Template
 
 func init() {
 	var err error
-	tmpl := template.New("gaiaConfigFileTemplate")
+	tmpl := template.New("appConfigFileTemplate")
 	if configTemplate, err = tmpl.Parse(defaultConfigTemplate); err != nil {
 		panic(err)
 	}
 }
 
-// ParseConfig retrieves the default environment configuration for Gaia.
+// ParseConfig retrieves the default environment configuration for the
+// application.
 func ParseConfig() (*Config, error) {
 	conf := DefaultConfig()
 	err := viper.Unmarshal(conf)

server/util.go

@@ -105,17 +105,13 @@ func interceptLoadConfig() (conf *cfg.Config, err error) {
 		conf, err = tcmd.ParseConfig() // NOTE: ParseConfig() creates dir/files as necessary.
 	}
 
-	// create a default Gaia config file if it does not exist
-	//
-	// TODO: Rename config file to server.toml as it's not particular to Gaia
-	// (REF: https://github.com/cosmos/cosmos-sdk/issues/4125).
-	gaiaConfigFilePath := filepath.Join(rootDir, "config/gaiad.toml")
-	if _, err := os.Stat(gaiaConfigFilePath); os.IsNotExist(err) {
-		gaiaConf, _ := config.ParseConfig()
-		config.WriteConfigFile(gaiaConfigFilePath, gaiaConf)
+	appConfigFilePath := filepath.Join(rootDir, "config/app.toml")
+	if _, err := os.Stat(appConfigFilePath); os.IsNotExist(err) {
+		appConf, _ := config.ParseConfig()
+		config.WriteConfigFile(appConfigFilePath, appConf)
 	}
 
-	viper.SetConfigName("gaiad")
+	viper.SetConfigName("app")
 	err = viper.MergeInConfig()
 
 	return