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43 lines
1.0 KiB
Markdown
43 lines
1.0 KiB
Markdown
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module flag for command-line flag parsing
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- parsing flags like '--flag' or '--stuff=things' or '--things stuff'
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- handles bool, int, float and string args
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- is able to print usage
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- handled unknown arguments as error
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Usage example:
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```v
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module main
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import os
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import flag
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fn main() {
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mut fp := flag.new_flag_parser(os.args)
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fp.application('flag_example_tool')
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fp.version('v0.0.0')
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fp.description('This tool is only designed to show how the flag lib is working')
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fp.skip_executable()
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an_int := fp.int('an_int', 0, 0o666, 'some int to define 0o666 is default')
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a_bool := fp.bool('a_bool', 0, false, 'some \'real\' flag')
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a_float := fp.float('a_float', 0, 1.0, 'also floats')
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a_string := fp.string('a_string', `a`, 'no text', 'finally, some text with "a" an abbreviation')
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additional_args := fp.finalize() or {
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eprintln(err)
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println(fp.usage())
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return
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}
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println('
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an_int: $an_int
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a_bool: $a_bool
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a_float: $a_float
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a_string: \'$a_string\'
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')
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println(additional_args.join_lines())
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}
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```
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