feat(cli): add config command

cmd/zit/main.go

@@ -3,6 +3,7 @@ package main
 import (
 	"fmt"
 	"os"
+	"zit/internal/config"
 	"zit/internal/doctor"
 	"zit/internal/identity"
 	"zit/internal/version"
@@ -20,6 +21,7 @@ func main() {
 			version.VersionCmd(AppVersion),
 			doctor.DoctorCmd,
 			identity.SetCmd,
+			config.ConfigCmd,
 		},
 	}
 

internal/config/config.go

@@ -19,6 +19,7 @@ func (err *ErrConfigNotFound) Error() string {
 	if err.EnvVar {
 		envVar = " defined in " + EnvVarName + " variable"
 	}
+
 	return fmt.Sprintf("config file%s is not found at %s", envVar, err.Path)
 }
 

internal/config/config_cmd.go

@@ -0,0 +1,76 @@
+package config
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+
+	"github.com/spf13/afero"
+	"github.com/urfave/cli/v2"
+)
+
+var ConfigCmd = &cli.Command{
+	Name: "config",
+	Subcommands: []*cli.Command{
+		configPathCmd,
+		configShowCmd,
+	},
+}
+
+var configPathCmd = &cli.Command{
+	Name: "path",
+	Action: func(_ *cli.Context) error {
+		fs := afero.NewOsFs()
+
+		userHomeDir, err := os.UserHomeDir()
+		if err != nil {
+			return fmt.Errorf("cannot user home dir: %v", err)
+		}
+
+		configPathFromEnv := os.Getenv(EnvVarName)
+		xdgHomePathFromEnv := os.Getenv(XdgEnvVarName)
+
+		confPath, err := LocateConfFile(fs, userHomeDir, configPathFromEnv, xdgHomePathFromEnv)
+		if err != nil {
+			return fmt.Errorf("could not locate config file: %w", err)
+		}
+
+		fmt.Println(confPath)
+
+		return nil
+	},
+}
+
+var configShowCmd = &cli.Command{
+	Name: "show",
+	Action: func(_ *cli.Context) error {
+		fs := afero.NewOsFs()
+
+		userHomeDir, err := os.UserHomeDir()
+		if err != nil {
+			return fmt.Errorf("cannot user home dir: %v", err)
+		}
+
+		configPathFromEnv := os.Getenv(EnvVarName)
+		xdgHomePathFromEnv := os.Getenv(XdgEnvVarName)
+
+		confPath, err := LocateConfFile(fs, userHomeDir, configPathFromEnv, xdgHomePathFromEnv)
+		if err != nil {
+			return fmt.Errorf("could not locate config file: %w", err)
+		}
+
+		conf, err := Load(confPath)
+		if err != nil {
+			return err
+		}
+
+		confJson, err := json.MarshalIndent(conf, "", "  ")
+		if err != nil {
+			return err
+		}
+
+		fmt.Println(string(confJson))
+
+		return nil
+	},
+}

internal/config/load.go

@@ -30,6 +30,7 @@ func Load(filename string) (*ConfigRoot, error) {
 		if err != nil {
 			return nil, err
 		}
+
 		return parseYaml(contents)
 	default:
 		return nil, fmt.Errorf("something went horribly wrong")
@@ -40,6 +41,7 @@ func formatFromFilename(filename string) string {
 	if strings.HasSuffix(filename, ".yaml") {
 		return yamlFormat
 	}
+
 	return otherFormat
 }
 
@@ -50,6 +52,7 @@ func LocateConfFile(fs afero.Fs, userHomeDir, confPathFromEnv string, xdgHomeFro
 		if fileExists(fs, confPathFromEnv) {
 			return confPathFromEnv, nil
 		}
+
 		return "", &ErrConfigNotFound{
 			EnvVar: true,
 			Path:   "'" + confPathFromEnv + "'",
@@ -62,6 +65,7 @@ func LocateConfFile(fs afero.Fs, userHomeDir, confPathFromEnv string, xdgHomeFro
 	if xdgHomeFromEnv == "" {
 		xdgHomeFromEnv = path.Join(userHomeDir, ".config")
 	}
+
 	xdgYamlDefault := path.Join(xdgHomeFromEnv, "zit", "config.yaml")
 	if fileExists(fs, xdgYamlDefault) {
 		return xdgYamlDefault, nil
@@ -86,9 +90,11 @@ func fileExists(fs afero.Fs, filename string) bool {
 	if os.IsNotExist(err) {
 		return false
 	}
+
 	if fileInfo.IsDir() {
 		return false
 	}
+
 	return true
 }
 
@@ -97,5 +103,6 @@ func parseYaml(contents []byte) (*ConfigRoot, error) {
 	if err := yaml.Unmarshal(contents, &config); err != nil {
 		return nil, err
 	}
+
 	return &config, nil
 }