use getopt for cli args

[tmck-code]

Context

Note: this is a breaking change to the pokesay CLI args

---

Breaking Changes

TL;DR - all args now have two dashes at the beginning instead of one!

e.g.

# before
echo w | pokesay -name pikachu

# after
echo w | pokesay --name pikachu

Added args

• -h/--help show usage/help info
• -v/--verbose display the timer info

---

CLI programs aren't groovy to use unless you have some freedom to use short or long args. Up until this point, pokesay has used single-dash go args, e.g.

echo w | pokesay -name pikachu -unicode-border -width 40

I've finally tired of this and thankfully there's a great package getopt that provides exactly what I needed - long and short cli args, e.g.

--name/-n
--category/-c
--info-border/-i
# and so on

Changes

• install the package
• convert existing args to getopt

Usage

Usage: pokesay [-bCfhjLlsuvW] [-c value] [-n value] [-t value] [-w value] [parameters ...]
 -b, --info-border  draw a border around the info box
 -c, --category=value
                    choose a pokemon from a specific category
 -C, --no-category-info
                    do not print pokemon category information in the info box
 -f, --fastest      run with the fastest possible configuration (--nowrap &
                    --notabspaces)
 -h, --help         display this help message
 -j, --japanese-name
                    print the japanese name in the info box
 -L, --list-categories
                    list all available categories
 -l, --list-names   list all available names
 -n, --name=value   choose a pokemon from a specific name
 -s, --no-tab-spaces
                    do not replace tab characters (fastest)
 -t, --tab-width=value
                    replace any tab characters with N spaces [4]
 -u, --unicode-borders
                    use unicode characters to draw the border around the speech
                    box (and info box if --info-border is enabled)
 -v, --verbose      print verbose output
 -W, --no-wrap      disable text wrapping (fastest)
 -w, --width=value  the max speech bubble width [80]

Demo

This example

• has unicode borders
• info box with border
• info box with japanese name
• info box without categories
• width of 40
• pokemon matching pikachu
• and also (optionally) ones that have the category "right"
  • i.e. they stand facing the right

echo w | pokesay -ujbC -w 40 -n pikachu -c right