basic ls

Author: tgvashworth

cli-files/README.md

@@ -63,9 +63,11 @@ A world of struggle.
 
 ### Steps (notes)
 
-- Setup cobra with https://github.com/spf13/cobra/blob/master/user_guide.md
-- install in cli-files `go get -u github.com/spf13/cobra@latest`
-- `cmd` directory, `root.go`
+- create `go-ls` dir
+- create `go.mod`, `main.go`, `cmd/root.go`
+- `go get -u github.com/spf13/cobra@latest`
+- follow [user guide](https://github.com/spf13/cobra/blob/master/user_guide.md) to `main.go` and `root.go` with a root command that prints hello
+- implement basic ls with `os.ReadDir`
 
 [go]: https://go.dev/
 [cat]: https://en.m.wikipedia.org/wiki/Cat_(Unix)

cli-files/go-ls/cmd/root.go

@@ -10,8 +10,15 @@ import (
 var rootCmd = &cobra.Command{
 	Use:   "go-ls",
 	Short: "go-ls is a re-implementation of the ls command",
-	Run: func(cmd *cobra.Command, args []string) {
-		fmt.Println("Hello, world!")
+	RunE: func(cmd *cobra.Command, args []string) error {
+		files, err := os.ReadDir(".")
+		if err != nil {
+			return err
+		}
+		for _, file := range files {
+			fmt.Println(file.Name())
+		}
+		return nil
 	},
 }