tutorial.md

Adding a command

There are many ways to add command easily.

• Adding commands using: elif

  • Recommended if using if/else/elif/fi, you can use: switch/case

• Adding commands by using functions.

Function

# this is an example for function.
foo(){
    echo "bar"
}

# we are calling the foo
foo

Adding more functions

Using variable: $1/$2/$3

# $1 is the variable for the first command:
# example: cli >>>--help<<< --another-param
# the >>>--help<<< will return --help command which $1 param.

# so we need to get it using variable $1/$2/$3

if [ "$1" == "--help" ] || [ "$1" == "-h" ]; then
	echo "You typed help!"
else
	echo "You typed not help."
fi

Adding function to execute a command.

Example:

help(){
   echo "Hello world."
}

So we are saying if:

test(){
   echo "test"
}

if [ "$1" == "--test" ]; then
	# we are calling test() function
	test
   else
	echo "type --test correctly on parameter!"
fi

Adding aliases to command.

You can basically add aliases variables, for example:

if [ "$1" == "--test" ] || [ "$1" == "-t" ]; then
	echo "test"
fi

Use || between [ "$1" == "--help" ] and [ "$1" == "-t"

Using switch/case

You can also basically call switch method.

case $1 in
	"--help")
		echo "help command"
		;;
	"--test")
		echo "test command"
		;;
esac

Done, you are now learned the basics of shell script. Thats all!