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Merge pull request #29 from rsteube/flag-file
moved flag to separate file
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| package spec | ||
|
|
||
| import ( | ||
| "regexp" | ||
| "strings" | ||
|
|
||
| "github.com/spf13/pflag" | ||
| ) | ||
|
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| type flag struct { | ||
| longhand string | ||
| shorthand string | ||
| usage string | ||
| slice bool | ||
| optarg bool | ||
| value bool | ||
| } | ||
|
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| func parseFlag(s, usage string) (f flag) { | ||
| r := regexp.MustCompile(`^(?P<shorthand>-[^-])?(, )?(?P<longhand>--[^ =*?]*)?(?P<modifier>[=*?]*)$`) | ||
| matches := findNamedMatches(r, s) | ||
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| f.longhand = strings.TrimPrefix(matches["longhand"], "--") | ||
| f.shorthand = strings.TrimPrefix(matches["shorthand"], "-") | ||
| f.usage = usage | ||
| f.slice = strings.Contains(matches["modifier"], "*") | ||
| f.optarg = strings.Contains(matches["modifier"], "?") | ||
| f.value = f.optarg || strings.Contains(matches["modifier"], "=") | ||
|
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| // TODO enable error check | ||
| //if f.longhand == "" && f.shorthand == "" { | ||
| // err = fmt.Errorf("malformed flag: '%v'", s) | ||
| //} | ||
| return | ||
| } | ||
|
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| func (f flag) addTo(flagSet *pflag.FlagSet) { | ||
| if f.longhand != "" && f.shorthand != "" { | ||
| if f.value { | ||
| if f.slice { | ||
| flagSet.StringSliceP(f.longhand, f.shorthand, []string{}, f.usage) | ||
| } else { | ||
| flagSet.StringP(f.longhand, f.shorthand, "", f.usage) | ||
| } | ||
| } else { | ||
| if f.slice { | ||
| flagSet.CountP(f.longhand, f.shorthand, f.usage) | ||
| } else { | ||
| flagSet.BoolP(f.longhand, f.shorthand, false, f.usage) | ||
| } | ||
| } | ||
| } else if f.longhand != "" { | ||
| if f.value { | ||
| if f.slice { | ||
| flagSet.StringSlice(f.longhand, []string{}, f.usage) | ||
| } else { | ||
| flagSet.String(f.longhand, "", f.usage) | ||
| } | ||
| } else { | ||
| if f.slice { | ||
| flagSet.Count(f.longhand, f.usage) | ||
| } else { | ||
| flagSet.Bool(f.longhand, false, f.usage) | ||
| } | ||
| } | ||
| } else if f.shorthand != "" { | ||
| if f.value { | ||
| if f.slice { | ||
| flagSet.StringSliceS(f.shorthand, f.shorthand, []string{}, f.usage) | ||
| } else { | ||
| flagSet.StringS(f.shorthand, f.shorthand, "", f.usage) | ||
| } | ||
| } else { | ||
| if f.slice { | ||
| flagSet.CountS(f.shorthand, f.shorthand, f.usage) | ||
| } else { | ||
| flagSet.BoolS(f.shorthand, f.shorthand, false, f.usage) | ||
| } | ||
| } | ||
| } | ||
|
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| if f.optarg { | ||
| if f.longhand != "" { | ||
| flagSet.Lookup(f.longhand).NoOptDefVal = " " | ||
| } else { | ||
| flagSet.Lookup(f.shorthand).NoOptDefVal = " " | ||
| } | ||
| } | ||
| } |
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