fix(cmd/gossamer): embed default toml config files (#3091)

Co-authored-by: Diego Romero <diego2737@gmail.com>

chain/resources.go

@@ -0,0 +1,10 @@
+// Copyright 2023 ChainSafe Systems (ON)
+// SPDX-License-Identifier: LGPL-3.0-only
+package chain
+
+import "embed"
+
+// DefaultConfigTomlFiles is the embedded file system containing the default toml configurations.
+//
+//go:embed */*.toml
+var DefaultConfigTomlFiles embed.FS

cmd/gossamer/config.go

@@ -26,18 +26,18 @@ import (
 var (
 	// DefaultCfg is the default configuration for the node.
 	DefaultCfg                  = dot.PolkadotConfig
-	defaultKusamaConfigPath     = "./chain/kusama/config.toml"
-	defaultPolkadotConfigPath   = "./chain/polkadot/config.toml"
-	defaultWestendDevConfigPath = "./chain/westend-dev/config.toml"
-	defaultWestendConfigPath    = "./chain/westend/config.toml"
+	defaultKusamaConfigPath     = "kusama/config.toml"
+	defaultPolkadotConfigPath   = "polkadot/config.toml"
+	defaultWestendDevConfigPath = "westend-dev/config.toml"
+	defaultWestendConfigPath    = "westend/config.toml"
 )
 
 // loadConfigFile loads a default config file if --chain is specified, a specific
 // config if --config is specified, or the default gossamer config otherwise.
 func loadConfigFile(ctx *cli.Context, cfg *ctoml.Config) (err error) {
 	cfgPath := ctx.String(ConfigFlag.Name)
 	if cfgPath == "" {
-		return loadConfig(cfg, defaultPolkadotConfigPath)
+		return loadConfigFromResource(cfg, defaultPolkadotConfigPath)
 	}
 
 	logger.Info("loading toml configuration from " + cfgPath + "...")
@@ -48,7 +48,7 @@ func loadConfigFile(ctx *cli.Context, cfg *ctoml.Config) (err error) {
 			"overwriting default configuration with id " + cfg.Global.ID +
 				" with toml configuration values from " + cfgPath)
 	}
-	return loadConfig(cfg, cfgPath)
+	return loadConfigFromFile(cfg, cfgPath)
 }
 
 func setupConfigFromChain(ctx *cli.Context) (*ctoml.Config, *dot.Config, error) {
@@ -68,22 +68,22 @@ func setupConfigFromChain(ctx *cli.Context) (*ctoml.Config, *dot.Config, error)
 			logger.Info("loading toml configuration from " + defaultKusamaConfigPath + "...")
 			tomlCfg = &ctoml.Config{}
 			cfg = dot.KusamaConfig()
-			err = loadConfig(tomlCfg, defaultKusamaConfigPath)
+			err = loadConfigFromResource(tomlCfg, defaultKusamaConfigPath)
 		case "polkadot":
 			logger.Info("loading toml configuration from " + defaultPolkadotConfigPath + "...")
 			tomlCfg = &ctoml.Config{}
 			cfg = dot.PolkadotConfig()
-			err = loadConfig(tomlCfg, defaultPolkadotConfigPath)
+			err = loadConfigFromResource(tomlCfg, defaultPolkadotConfigPath)
 		case "westend-dev":
 			logger.Info("loading toml configuration from " + defaultWestendDevConfigPath + "...")
 			tomlCfg = &ctoml.Config{}
 			cfg = dot.WestendDevConfig()
-			err = loadConfig(tomlCfg, defaultWestendDevConfigPath)
+			err = loadConfigFromResource(tomlCfg, defaultWestendDevConfigPath)
 		case "westend":
 			logger.Info("loading toml configuration from " + defaultWestendConfigPath + "...")
 			tomlCfg = &ctoml.Config{}
 			cfg = dot.WestendConfig()
-			err = loadConfig(tomlCfg, defaultWestendConfigPath)
+			err = loadConfigFromResource(tomlCfg, defaultWestendConfigPath)
 		default:
 			logger.Info("loading chain config from " + id + "...")
 			fileInfo, err := os.Stat(id)

cmd/gossamer/export_test.go

@@ -8,7 +8,6 @@ import (
 	"testing"
 
 	"github.com/ChainSafe/gossamer/dot"
-
 	ctoml "github.com/ChainSafe/gossamer/dot/config/toml"
 	"github.com/ChainSafe/gossamer/internal/log"
 	"github.com/stretchr/testify/require"
@@ -165,7 +164,7 @@ func TestExportCommand(t *testing.T) {
 			config := ctx.String(ConfigFlag.Name)
 
 			cfg := new(ctoml.Config)
-			err = loadConfig(cfg, config)
+			err = loadConfigFromFile(cfg, config)
 			require.NoError(t, err)
 
 			require.Equal(t, dotConfigToToml(c.expected), cfg)

cmd/gossamer/main_test.go

@@ -192,6 +192,8 @@ func runTestGossamer(t *testing.T, args ...string) *testgossamer {
 	return tt
 }
 
+var testWestendDevConfigPath string
+
 func TestMain(m *testing.M) {
 	if reexec.Init() {
 		return
@@ -202,10 +204,7 @@ func TestMain(m *testing.M) {
 		panic(err)
 	}
 
-	defaultKusamaConfigPath = filepath.Join(rootPath, "./chain/kusama/config.toml")
-	defaultPolkadotConfigPath = filepath.Join(rootPath, "./chain/polkadot/config.toml")
-	defaultWestendDevConfigPath = filepath.Join(rootPath, "./chain/westend-dev/config.toml")
-
+	testWestendDevConfigPath = filepath.Join(rootPath, "./chain/westend-dev/config.toml")
 	os.Exit(m.Run())
 }
 
@@ -234,7 +233,7 @@ func TestInitCommand_RenameNodeWhenCalled(t *testing.T) {
 		"--basepath", tempDir,
 		"--genesis", genesisPath,
 		"--name", nodeName,
-		"--config", defaultWestendDevConfigPath,
+		"--config", testWestendDevConfigPath,
 		"--force",
 	)
 
@@ -249,7 +248,7 @@ func TestInitCommand_RenameNodeWhenCalled(t *testing.T) {
 		"init",
 		"--basepath", tempDir,
 		"--genesis", genesisPath,
-		"--config", defaultWestendDevConfigPath,
+		"--config", testWestendDevConfigPath,
 		"--force",
 	)
 

cmd/gossamer/toml_config.go

@@ -11,25 +11,35 @@ import (
 	"reflect"
 	"unicode"
 
-	"github.com/naoina/toml"
-
+	"github.com/ChainSafe/gossamer/chain"
 	ctoml "github.com/ChainSafe/gossamer/dot/config/toml"
+	"github.com/naoina/toml"
 )
 
-// loadConfig loads the values from the toml configuration file into the provided configuration
-func loadConfig(cfg *ctoml.Config, fp string) error {
+func loadConfigFromResource(cfg *ctoml.Config, resourcePath string) error {
+	file, err := chain.DefaultConfigTomlFiles.Open(resourcePath)
+	if err != nil {
+		return fmt.Errorf("opening toml configuration file: %w", err)
+	}
+	return loadConfig(cfg, file)
+}
+
+func loadConfigFromFile(cfg *ctoml.Config, fp string) error {
 	fp, err := filepath.Abs(fp)
 	if err != nil {
 		logger.Errorf("failed to create absolute path for toml configuration file: %s", err)
 		return err
 	}
-
 	file, err := os.Open(filepath.Clean(fp))
 	if err != nil {
 		logger.Errorf("failed to open toml configuration file: %s", err)
 		return err
 	}
+	return loadConfig(cfg, file)
+}
 
+// loadConfig loads the values from the toml configuration file into the provided configuration
+func loadConfig(cfg *ctoml.Config, file fs.File) (err error) {
 	var tomlSettings = toml.Config{
 		NormFieldName: func(rt reflect.Type, key string) string {
 			return key

cmd/gossamer/toml_config_test.go

@@ -25,7 +25,7 @@ func TestLoadConfig(t *testing.T) {
 	err := dot.InitNode(cfg)
 	require.NoError(t, err)
 
-	err = loadConfig(dotConfigToToml(cfg), cfgFile)
+	err = loadConfigFromFile(dotConfigToToml(cfg), cfgFile)
 	require.NoError(t, err)
 }
 
@@ -43,7 +43,7 @@ func TestLoadConfigWestendDev(t *testing.T) {
 	projectRootPath := utils.GetProjectRootPathTest(t)
 	configPath := filepath.Join(projectRootPath, "./chain/westend-dev/config.toml")
 
-	err = loadConfig(dotConfigToToml(cfg), configPath)
+	err = loadConfigFromFile(dotConfigToToml(cfg), configPath)
 	require.NoError(t, err)
 }
 
@@ -60,6 +60,6 @@ func TestLoadConfigKusama(t *testing.T) {
 	projectRootPath := utils.GetProjectRootPathTest(t)
 	kusamaConfigPath := filepath.Join(projectRootPath, "./chain/kusama/config.toml")
 
-	err = loadConfig(dotConfigToToml(cfg), kusamaConfigPath)
+	err = loadConfigFromFile(dotConfigToToml(cfg), kusamaConfigPath)
 	require.NoError(t, err)
 }

lib/utils/utils.go

@@ -191,14 +191,14 @@ var (
 	ErrFindProjectRoot = errors.New("cannot find project root")
 )
 
-// GetProjectRootPath finds the root of the project where `go.mod` is
-// and returns it as an absolute path.
+// GetProjectRootPath finds the root of the project where directory `cmd`
+// and subdirectory `gossamer` is and returns it as an absolute path.
 func GetProjectRootPath() (rootPath string, err error) {
 	_, fullpath, _, _ := runtime.Caller(0)
 	rootPath = path.Dir(fullpath)
 
-	const directoryToFind = "chain"
-	const subPathsToFind = "westend-dev,westend-local,kusama,polkadot"
+	const directoryToFind = "cmd"
+	const subPathsToFind = "gossamer"
 
 	subPaths := strings.Split(subPathsToFind, ",")