74 lines
1.6 KiB
V
74 lines
1.6 KiB
V
module cli
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const (
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BASE_INDENT = 2
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ABBREV_INDENT = 5
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DESCRIPTION_INDENT = 20
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)
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fn help_flag() Flag {
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return Flag{
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flag: .bool,
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name: 'help',
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abbrev: 'h',
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description: 'Prints help information',
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}
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}
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fn help_cmd() Command {
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return Command{
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name: 'help',
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description: 'Prints help information',
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execute: help_func,
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}
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}
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fn help_func(help_cmd cli.Command) {
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cmd := help_cmd.parent
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full_name := cmd.full_name()
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mut help := ''
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help += 'Usage: ${full_name}'
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if cmd.flags.len > 0 { help += ' [FLAGS]'}
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if cmd.commands.len > 0 { help += ' [COMMANDS]'}
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help += '\n\n'
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if cmd.description != '' {
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help += '${cmd.description}\n\n'
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}
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if cmd.flags.len > 0 {
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help += 'Flags:\n'
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for flag in cmd.flags {
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mut flag_name := ''
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if flag.abbrev != '' {
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abbrev_indent := ' '.repeat(ABBREV_INDENT-(flag.abbrev.len+1))
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flag_name = '-${flag.abbrev}${abbrev_indent}--${flag.name}'
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} else {
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abbrev_indent := ' '.repeat(ABBREV_INDENT-(flag.abbrev.len))
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flag_name = '${abbrev_indent}--${flag.name}'
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}
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mut required := ''
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if flag.required {
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required = ' (required)'
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}
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base_indent := ' '.repeat(BASE_INDENT)
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description_indent := ' '.repeat(DESCRIPTION_INDENT-flag_name.len)
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help += '${base_indent}${flag_name}${description_indent}${flag.description}${required}\n'
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}
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help += '\n'
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}
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if cmd.commands.len > 0 {
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help += 'Commands:\n'
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for command in cmd.commands {
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base_indent := ' '.repeat(BASE_INDENT)
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description_indent := ' '.repeat(DESCRIPTION_INDENT-command.name.len)
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help += '${base_indent}${command.name}${description_indent}${command.description}\n'
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}
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help += '\n'
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}
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print(help)
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}
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