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v/examples/cli.v
2020-03-10 16:11:17 +01:00

62 lines
1.3 KiB
V

module main
import (
cli
os
)
fn main() {
mut cmd := cli.Command{
name: 'cli',
description: 'An example of the cli library',
version: '1.0.0',
parent: 0
}
mut greet_cmd := cli.Command{
name: 'greet',
description: 'Prints greeting in different languages',
pre_execute: greet_pre_func,
execute: greet_func,
post_execute: greet_post_func,
parent: 0
}
greet_cmd.add_flag(cli.Flag{
flag: .string,
required: true,
name: 'language',
abbrev: 'l',
description: 'Language of the message'
})
greet_cmd.add_flag(cli.Flag{
flag: .int,
name: 'times',
value: '3',
description: 'Number of times the message gets printed'
})
cmd.add_command(greet_cmd)
cmd.parse(os.args)
}
fn greet_func(cmd cli.Command) {
language := cmd.flags.get_string('language') or { panic('failed to get \'language\' flag: $err') }
times := cmd.flags.get_int('times') or { panic('failed to get \'times\' flag: $err') }
for i in 0..times {
match language {
'english' { println('Hello World') }
'german' { println('Hallo Welt') }
'dutch' { println('Hallo Wereld') }
else { println('unsupported language') }
}
}
}
fn greet_pre_func(cmd cli.Command) {
println('This is a function running before the main function')
}
fn greet_post_func(cmd cli.Command) {
println('This is a function running after the main function')
}