further docs

Author: tgvashworth

cli-files/README.md

@@ -154,6 +154,8 @@ If you smash through this, here's some fun/tricky extensions:
 - `cobra-cli init .`
 - look at all the files
 - `go install . && go-cat`
+- set up a command that takes an argument, opens the file and prints it out (`os.ReadFile`, `os.Stdout.Write`)
+- handle the error if you pass a directory like cat does
 
 [go]: https://go.dev/
 [cat]: https://en.m.wikipedia.org/wiki/Cat_(Unix)

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

@@ -35,6 +35,8 @@ func NewRoodCmd() *cobra.Command {
 				return fmt.Errorf("go-cat: %s: Is a directory", path)
 			}
 
+			// Read the data from the file
+			// https://pkg.go.dev/os#ReadFile
 			data, err := os.ReadFile(path)
 			if err != nil {
 				return err