100 lines
2.3 KiB
V
100 lines
2.3 KiB
V
// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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module main
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import (
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internal.flag
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os
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)
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const (
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//list_of_flags contains a list of flags where an argument is expected past it.
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list_of_flags = [
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'o', 'output', 'd', 'define', 'b', 'backend', 'cc', 'os', 'target-os', 'arch',
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'csource', 'cf', 'cflags', 'path'
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]
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)
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fn join_flags_and_argument() []string {
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vosargs := os.getenv('VOSARGS')
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if vosargs != '' {
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return vosargs.split(' ')
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}
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// No VOSARGS? Look for VFLAGS and concat it with command-line options.
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mut args := []string
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vflags := os.getenv('VFLAGS')
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if vflags != '' {
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args << os.args[0]
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args << vflags.split(' ')
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if os.args.len > 1 {
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args << os.args[1..]
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}
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return args
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}
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// No VFLAGS too? Just return command-line args.
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return os.args
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}
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fn parse_flags(flag string, f mut flag.Instance, prefs mut flag.MainCmdPreferences) {
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match flag {
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'v' {
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f.is_equivalent_to(['v', 'vv', 'vvv', 'verbose'])
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prefs.verbosity = .level_one
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}
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'vv' {
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f.is_equivalent_to(['v', 'vv', 'vvv', 'verbose'])
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prefs.verbosity = .level_two
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}
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'vvv' {
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f.is_equivalent_to(['v', 'vv', 'vvv', 'verbose'])
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prefs.verbosity = .level_three
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}
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'verbose' {
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f.is_equivalent_to(['v', 'vv', 'vvv', 'verbose'])
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level := f.int() or {
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println('V error: Expected `0`, `1`, `2` or `3` as argument to `-verbose` to specify verbosity level.')
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exit(1)
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}
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match level {
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0 {} //Zero verbosity is already default.
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1 {
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prefs.verbosity = .level_one
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}
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2 {
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prefs.verbosity = .level_two
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}
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3 {
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prefs.verbosity = .level_three
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}
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else {
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println('V error: Expected `0`, `1`, `2` or `3` as argument to `-verbose` to specify verbosity level.')
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exit(1)
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}
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}
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}
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'h', 'help' {
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f.is_equivalent_to(['h', 'help'])
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prefs.action = .help
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}
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'v', 'version' {
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f.is_equivalent_to(['v', 'version'])
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prefs.action = .version
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}
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'-version', '-help' {
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println('V error: `-$flag` has been deprecated. Use `$flag` instead.')
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exit(1)
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}
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else {
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prefs.unknown_flag = '-$flag'
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if !(flag in list_of_flags) {
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return
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}
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f.string() or {
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println('V error: Error parsing flag. Expected value for `-$flag`.')
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exit(1)
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}
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}
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}
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}
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