Fix issue with generating config on first run

internal/config/nope.json

@@ -0,0 +1,15 @@
+{
+	"configs": [
+		{
+			"id": "0",
+			"name": "default",
+			"ssh": {
+				"user": "user",
+				"identity": "./id_rsa",
+				"port": "22",
+				"overrides": []
+			},
+			"interface": ""
+		}
+	]
+}

internal/config/repo-json.go

@@ -15,17 +15,19 @@ import (
 
 // JSONRepo is our repo implementation for json
 type JSONRepo struct {
-	configPath string
-	configs    []*Config
-	mux        sync.Mutex
+	configPath    string
+	configs       []*Config
+	defaultConfig Config
+	mux           sync.Mutex
 }
 
 // NewJSONRepo returns a new ops repo for flat yaml file
-func NewJSONRepo(configPath string) (*JSONRepo, error) {
+func NewJSONRepo(configPath string, defaultConfig Config) (*JSONRepo, error) {
 	repo := &JSONRepo{
-		configPath: configPath,
-		configs:    []*Config{},
-		mux:        sync.Mutex{},
+		configPath:    configPath,
+		configs:       []*Config{},
+		defaultConfig: defaultConfig,
+		mux:           sync.Mutex{},
 	}
 
 	if err := repo.load(); err != nil {
@@ -192,6 +194,10 @@ func (r *JSONRepo) write() error {
 }
 
 func (r *JSONRepo) load() error {
+	if _, err := os.Stat(r.configPath); errors.Is(err, os.ErrNotExist) {
+		r.createDefaultConfig()
+	}
+
 	file, err := os.Open(r.configPath)
 
 	if err != nil {
@@ -217,6 +223,30 @@ func (r *JSONRepo) load() error {
 	return nil
 }
 
+func (r *JSONRepo) createDefaultConfig() error {
+	configs := Configs{
+		Configs: []*Config{&r.defaultConfig},
+	}
+
+	file, err := os.OpenFile(r.configPath, os.O_APPEND|os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0644)
+
+	if err != nil {
+		return err
+	}
+
+	defer file.Close()
+
+	data, err := json.MarshalIndent(&configs, "", "\t")
+
+	if err != nil {
+		return err
+	}
+
+	_, err = file.Write(data)
+
+	return err
+}
+
 // helpers
 func copyConfig(c *Config) *Config {
 	return &Config{

internal/config/repo_test.go

@@ -22,7 +22,7 @@ func assertEqualConf(t *testing.T, expected, actual *config.Config) {
 	}
 }
 
-func TestConfigYamlRepo(t *testing.T) {
+func TestConfigJsonRepo(t *testing.T) {
 	testConfigFile := "config.json"
 	file, err := os.Create(testConfigFile)
 
@@ -32,6 +32,17 @@ func TestConfigYamlRepo(t *testing.T) {
 		os.RemoveAll(testConfigFile)
 	}()
 
+	defaultConf := config.Config{
+		ID:   "0",
+		Name: "default",
+		SSH: config.SSHConfig{
+			User:      "user",
+			Identity:  "./id_rsa",
+			Port:      "22",
+			Overrides: []config.SSHOverride{},
+		},
+	}
+
 	conf := config.Config{
 		ID:   "1",
 		Name: "myConfig",
@@ -52,18 +63,10 @@ func TestConfigYamlRepo(t *testing.T) {
 
 	assert.NoError(t, err)
 
-	repo, err := config.NewJSONRepo(testConfigFile)
+	repo, err := config.NewJSONRepo(testConfigFile, defaultConf)
 
 	assert.NoError(t, err)
 
-	t.Run("returns error if cannot instantiate instance", func(st *testing.T) {
-		repo, err := config.NewJSONRepo("nope.json")
-
-		assert.Nil(st, repo)
-		assert.Error(t, err)
-
-	})
-
 	t.Run("returns record not found error", func(st *testing.T) {
 		_, err := repo.Get("10")
 

internal/core/create.go

@@ -17,14 +17,15 @@ import (
 	"github.com/spf13/viper"
 )
 
-// getDefaultConfig creates and returns a default configuration
-func getDefaultConfig(networkInfo network.Network) *config.Config {
+// CreateNewAppCore creates and returns a new instance of *core.Core
+func CreateNewAppCore(networkInfo network.Network, eventManager event.Manager, debug bool) (*Core, error) {
+	configPath := viper.Get("config-path").(string)
 	user := viper.Get("user").(string)
 	identity := viper.Get("default-ssh-identity").(string)
 	seed := time.Now().UTC().UnixNano()
 	nameGenerator := namegenerator.NewNameGenerator(seed)
 
-	return &config.Config{
+	defaultConf := config.Config{
 		Name: nameGenerator.Generate(),
 		SSH: config.SSHConfig{
 			User:      user,
@@ -34,13 +35,8 @@ func getDefaultConfig(networkInfo network.Network) *config.Config {
 		},
 		Interface: networkInfo.Interface().Name,
 	}
-}
-
-// CreateNewAppCore creates and returns a new instance of *core.Core
-func CreateNewAppCore(networkInfo network.Network, eventManager event.Manager, debug bool) (*Core, error) {
-	configPath := viper.Get("config-path").(string)
 
-	configRepo, err := config.NewJSONRepo(configPath)
+	configRepo, err := config.NewJSONRepo(configPath, defaultConf)
 
 	if err != nil {
 		return nil, err
@@ -52,8 +48,7 @@ func CreateNewAppCore(networkInfo network.Network, eventManager event.Manager, d
 
 	if err != nil {
 		if errors.Is(err, exception.ErrRecordNotFound) {
-			conf = getDefaultConfig(networkInfo)
-			conf, err = configService.Create(conf)
+			conf, err = configService.Create(&defaultConf)
 			if err != nil {
 				return nil, err
 			}