A simple example of writing a CLI using Golang using the Cobra module: https://github.com/spf13/cobra
Example output:
C02VQ1S6HTDD:golang_cli_tutorial nsiddiq$ go build
C02VQ1S6HTDD:golang_cli_tutorial nsiddiq$ ls
LICENSE golang_cli_tutorial main.go README.md lib cmd main
C02VQ1S6HTDD:golang_cli_tutorial nsiddiq$ ./golang_cli_tutorial
hooray my root command works
C02VQ1S6HTDD:golang_cli_tutorial nsiddiq$ ./golang_cli_tutorial sun
Error: unknown command "sun" for "golang_cli_tutorial"
Did you mean this?
sum
Run 'golang_cli_tutorial --help' for usage.
unknown command "sun" for "golang_cli_tutorial"
Did you mean this?
sum
C02VQ1S6HTDD:golang_cli_tutorial nsiddiq$ ./golang_cli_tutorial sum
No arguments given. Expected 1 or more integers.
Usage:
golang_cli_tutorial sum [flags]
Flags:
-h, --help help for sum
Global Flags:
--config string config file (default is $HOME/.golang_cli_tutorial.yaml)
C02VQ1S6HTDD:golang_cli_tutorial nsiddiq$ ./golang_cli_tutorial sum a b
ERROR: Conversion of value a to integer failed.
C02VQ1S6HTDD:golang_cli_tutorial nsiddiq$ ./golang_cli_tutorial sum 1 1
The sum of your integers is: 2
C02VQ1S6HTDD:golang_cli_tutorial nsiddiq$ ./golang_cli_tutorial sum 1 1 1 2
The sum of your integers is: 5