feat(cli): add init sub-command

cmd/cli.go

@@ -0,0 +1,78 @@
+package cmd
+
+import (
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/datahearth/config-mapper/internal/git"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+var (
+	errLogger = log.New(os.Stderr, "", 0)
+	logger    = log.New(os.Stderr, "", 0)
+)
+
+var rootCmd = &cobra.Command{
+	Use:   "config-mapper",
+	Short: "Manage your systems configuration",
+	Long: `config-mapper aims to help you manage your configurations between systems
+		with a single configuration file.`,
+}
+var initCmd = &cobra.Command{
+	Use:   "init",
+	Short: "Initialize your configuration folder",
+	Long: `Initialize will retrieve your configuration folder from the source location and
+		copy it into the destination field`,
+	Run: func(cmd *cobra.Command, args []string) {
+		logger.Println("initializing config-mapper folder from configuration...")
+		if _, err := git.OpenGitRepo(); err != nil {
+			errLogger.Printf("failed to initialize folder: %v\n", err)
+			os.Exit(1)
+		}
+		logger.Printf("repository initialized at \"%v\"\n", viper.GetString("storage.location"))
+	},
+}
+
+func init() {
+	cobra.OnInitialize(initConfig)
+	rootCmd.AddCommand(initCmd)
+}
+
+func initConfig() {
+	h, err := os.UserHomeDir()
+	if err != nil {
+		errLogger.Printf("can't get home directory through $HOME variable: %v\n", err)
+		os.Exit(1)
+	}
+
+	if c := os.Getenv("CONFIG_MAPPER_CFG"); c != "" {
+		viper.AddConfigPath(c)
+	} else {
+		viper.AddConfigPath(h)
+	}
+
+	viper.SetConfigType("yml")
+	viper.SetConfigName("config-mapper")
+
+	viper.SetDefault("storage.location", fmt.Sprintf("%s/config-mapper", os.TempDir()))
+
+	if err := viper.ReadInConfig(); err != nil {
+		if _, ok := err.(viper.ConfigFileNotFoundError); ok {
+			errLogger.Println("configuration file not found", err)
+		} else {
+			errLogger.Printf("failed to read config: %v\n", err)
+		}
+
+		os.Exit(1)
+	}
+}
+
+func Execute() {
+	if err := rootCmd.Execute(); err != nil {
+		errLogger.Printf("an error occured while running command: %v\n", err)
+		os.Exit(1)
+	}
+}

cmd/main.go

@@ -1,53 +0,0 @@
-package cmd
-
-import (
-	"log"
-	"os"
-
-	"github.com/spf13/cobra"
-	"github.com/spf13/viper"
-)
-
-var errLogger = log.New(os.Stderr, "", 0)
-
-var rootCmd = &cobra.Command{
-	Use:   "config-mapper",
-	Short: "Manage your systems configuration",
-	Long: `config-mapper aims to help you manage your configurations between systems
-						with a single configuration file.`,
-	Run: func(cmd *cobra.Command, args []string) {
-
-	},
-}
-
-func init() {
-	cobra.OnInitialize(initConfig)
-}
-
-func initConfig() {
-	h, err := os.UserHomeDir()
-	if err != nil {
-		errLogger.Printf("can't get home directory through $HOME variable: %v\n", err)
-		os.Exit(1)
-	}
-
-	if c := os.Getenv("CONFIG_MAPPER"); c != "" {
-		viper.AddConfigPath(c)
-	} else {
-		viper.AddConfigPath(h)
-	}
-
-	viper.SetConfigType("yml")
-	viper.SetConfigName("config-mapper")
-	if err := viper.ReadInConfig(); err != nil {
-		errLogger.Printf("failed to read config: %v\n", err)
-		os.Exit(1)
-	}
-}
-
-func Execute() {
-	if err := rootCmd.Execute(); err != nil {
-		errLogger.Printf("an error occured while running command: %v\n", err)
-		os.Exit(1)
-	}
-}

internal/configuration.go

@@ -9,11 +9,13 @@ type Configuration struct {
 
 type Storage struct {
 	Location string `yaml:"location"`
-	Git      struct {
-		Username   string `yaml:"username"`
-		Password   string `yaml:"password"`
-		Repository string `yaml:"repository"`
-	} `yaml:"git"`
+	Git      Git    `yaml:"git"`
+}
+
+type Git struct {
+	Username   string `yaml:"username"`
+	Password   string `yaml:"password"`
+	Repository string `yaml:"repository"`
 }
 
 type PkgManagers struct {

internal/git/git.go

@@ -0,0 +1,60 @@
+package git
+
+import (
+	"errors"
+	"os"
+
+	"github.com/go-git/go-git/v5"
+	"github.com/go-git/go-git/v5/plumbing/transport/http"
+	"github.com/spf13/viper"
+)
+
+var (
+	ErrDirIsFile      = errors.New("path is a file")
+	ErrEmptyGitConfig = errors.New("empty git configuration")
+)
+
+func OpenGitRepo() (*git.Repository, error) {
+	configFolder := viper.GetString("storage.location")
+
+	s, err := os.Stat(configFolder)
+	if err != nil {
+		if os.IsNotExist(err) {
+			gitConfig := viper.GetStringMapString("storage.git")
+			if gitConfig == nil {
+				return nil, ErrEmptyGitConfig
+			}
+
+			repo, err := git.PlainClone(viper.GetString("storage.location"), false, &git.CloneOptions{
+				URL:      gitConfig["repository"],
+				Progress: os.Stdout,
+				Auth: &http.BasicAuth{
+					Username: gitConfig["username"],
+					Password: gitConfig["password"],
+				},
+			})
+			if err != nil {
+				return nil, err
+			}
+
+			return repo, nil
+		}
+
+		return nil, err
+	}
+
+	if s.IsDir() {
+		return nil, ErrDirIsFile
+	}
+
+	repo, err := git.PlainOpen(configFolder)
+	if err != nil {
+		if err == git.ErrRepositoryNotExists {
+			return nil, err
+		}
+
+		return nil, err
+	}
+
+	return repo, nil
+}