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Simplify code

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Use a helper function for both code paths instead of duplicating the
logic.
This commit is contained in:
Ionut Nicula 2024-09-19 19:51:37 +03:00
parent b07c5cdd6f
commit cc1f750da2
1 changed files with 30 additions and 53 deletions
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83
command.go
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@ -643,6 +643,27 @@ func shortHasNoOptDefVal(name string, fs *flag.FlagSet) bool {
return flag.NoOptDefVal != ""
}
func shorthandCombinationNeedsNextArg(combination string, flags *flag.FlagSet) bool {
lastPos := len(combination) - 1
for i, shorthand := range combination {
if !shortHasNoOptDefVal(string(shorthand), flags) {
// This shorthand needs a value.
//
// If we're at the end of the shorthand combination, this means that the
// value for the shorthand is given in the next argument. (e.g. '-xyzf arg',
// where -x, -y, -z are boolean flags, and -f is a flag that needs a value).
//
// Otherwise, if the shorthand combination doesn't end here, this means that the value
// for the shorthand is given in the same argument, meaning we don't have to consume the
// next one. (e.g. '-xyzfarg', where -x, -y, -z are boolean flags, and -f is a flag that
// needs a value).
return i == lastPos
}
}
return false
}
func stripFlags(args []string, c *Command) ([]string, []string) {
if len(args) == 0 {
return args, nil
@ -675,36 +696,14 @@ Loop:
args = args[1:]
}
case strings.HasPrefix(s, "-") && !strings.HasPrefix(s, "--") && !strings.Contains(s, "=") && len(s) > 2:
shorthandCombination := s[1:] // Skip the leading "-"
lastPos := len(shorthandCombination) - 1
for i, shorthand := range shorthandCombination {
if shortHasNoOptDefVal(string(shorthand), flags) {
continue
}
// We found a shorthand that needs a value.
if i == lastPos {
// Since we're at the end of the shorthand combination, this means that the
// value for the shorthand is given in the next argument. (e.g. '-xyzf arg',
// where -x, -y, -z are boolean flags, and -f is a flag that needs a value).
// The whole combination will take a value.
flagsThatConsumeNextArg = append(flagsThatConsumeNextArg, s)
if len(args) <= 1 {
break Loop
} else {
args = args[1:]
}
shorthandCombination := s[1:] // Skip leading "-"
if shorthandCombinationNeedsNextArg(shorthandCombination, flags) {
flagsThatConsumeNextArg = append(flagsThatConsumeNextArg, s)
if len(args) <= 1 {
break Loop
} else {
// Since the shorthand combination doesn't end here, this means that the
// value for the shorthand is given in the same argument, meaning we don't
// have to consume the next one. (e.g. '-xyzfarg', where -x, -y, -z are
// boolean flags, and -f is a flag that needs a value).
args = args[1:]
}
break
}
case s != "" && !strings.HasPrefix(s, "-"):
commands = append(commands, s)
@ -848,38 +847,16 @@ func (c *Command) Traverse(args []string) (*Command, []string, error) {
inFlag = false
flags = append(flags, arg)
continue
// A flag without a value, or with an `=` separated value
// A flag with an `=` separated value, or a shorthand combination, possibly with a value
case isFlagArg(arg):
flags = append(flags, arg)
if !strings.HasPrefix(arg, "-") || strings.HasPrefix(arg, "--") || strings.Contains(arg, "=") || len(arg) <= 2 {
if strings.HasPrefix(arg, "--") || strings.Contains(arg, "=") || len(arg) <= 2 {
continue // Not a shorthand combination, so nothing more to do.
}
shorthandCombination := arg[1:] // Skip leading "-"
lastPos := len(shorthandCombination) - 1
for i, shorthand := range shorthandCombination {
if shortHasNoOptDefVal(string(shorthand), c.Flags()) {
continue
}
// We found a shorthand that needs a value.
if i == lastPos {
// Since we're at the end of the shorthand combination, this means that the
// value for the shorthand is given in the next argument. (e.g. '-xyzf arg',
// where -x, -y, -z are boolean flags, and -f is a flag that needs a value).
inFlag = true
} else {
// Since the shorthand combination doesn't end here, this means that the
// value for the shorthand is given in the same argument, meaning we don't
// have to consume the next one. (e.g. '-xyzfarg', where -x, -y, -z are
// boolean flags, and -f is a flag that needs a value).
}
break
}
inFlag = shorthandCombinationNeedsNextArg(shorthandCombination, c.Flags())
continue
}