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package cli
import (
"fmt"
"os"
)
// CheckArgCount is for flags with values, e.g. ["-n" "10"], while we're
// looking at the "-n": this let us see if the "10" slot exists.
func CheckArgCount(args []string, argi int, argc int, n int) {
if (argc - argi) < n {
fmt.Fprintf(os.Stderr, "%s: option \"%s\" missing argument(s).\n", "mlr", args[argi])
fmt.Fprintf(os.Stderr, "Please run \"%s --help\" for detailed usage information.\n", "mlr")
os.Exit(1)
}
}
// SeparatorFromArg is for letting people do things like `--ifs pipe`
// rather than `--ifs '|'`.
func SeparatorFromArg(name string) string {
sep, ok := SEPARATOR_NAMES_TO_VALUES[name]
if ok {
return sep
} else {
return name
}
}
// SeparatorRegexFromArg is for letting people do things like `--ifs-regex whitespace`
// rather than `--ifs '([ \t])+'`.
func SeparatorRegexFromArg(name string) string {
sep, ok := SEPARATOR_REGEX_NAMES_TO_VALUES[name]
if ok {
return sep
} else {
return name
}
}
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