mirror of
https://github.com/johnkerl/miller.git
synced 2026-01-23 02:14:13 +00:00
085e831668
* Update package version * Update makefile targets * Update readme packages * Remaining old packages via rg/sd
72 lines
2.5 KiB
Go
72 lines
2.5 KiB
Go
// ================================================================
|
|
// Utilities for Miller verbs to share for command-line parsing.
|
|
// ================================================================
|
|
|
|
package cli
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"strconv"
|
|
|
|
"github.com/johnkerl/miller/v6/pkg/lib"
|
|
)
|
|
|
|
// For flags with values, e.g. ["-n" "10"], while we're looking at the "-n" this let us see if the "10" slot exists.
|
|
// The verb is nominally something from a ways earlier in args[]; the opt is nominally what's at args[argi-1].
|
|
// So this function should be called with args[argi] pointing to the "10" slot.
|
|
func VerbCheckArgCount(verb string, opt string, args []string, argi int, argc int, n int) {
|
|
if (argc - argi) < n {
|
|
fmt.Fprintf(os.Stderr, "%s %s: option \"%s\" missing argument(s).\n",
|
|
"mlr", verb, opt,
|
|
)
|
|
os.Exit(1)
|
|
}
|
|
}
|
|
|
|
// E.g. with ["-f", "a,b,c"], makes sure there is something in the "a,b,c" position, and returns it.
|
|
func VerbGetStringArgOrDie(verb string, opt string, args []string, pargi *int, argc int) string {
|
|
VerbCheckArgCount(verb, opt, args, *pargi, argc, 1)
|
|
retval := args[*pargi]
|
|
*pargi += 1
|
|
return retval
|
|
}
|
|
|
|
// E.g. with ["-f", "a,b,c"], makes sure there is something in the "a,b,c" position,
|
|
// splits it on commas, and returns it.
|
|
func VerbGetStringArrayArgOrDie(verb string, opt string, args []string, pargi *int, argc int) []string {
|
|
stringArg := VerbGetStringArgOrDie(verb, opt, args, pargi, argc)
|
|
return lib.SplitString(stringArg, ",")
|
|
}
|
|
|
|
// E.g. with ["-n", "10"], makes sure there is something in the "10" position,
|
|
// scans it as int, and returns it.
|
|
func VerbGetIntArgOrDie(verb string, opt string, args []string, pargi *int, argc int) int64 {
|
|
flag := args[*pargi]
|
|
stringArg := VerbGetStringArgOrDie(verb, opt, args, pargi, argc)
|
|
retval, err := strconv.ParseInt(stringArg, 10, 64)
|
|
if err != nil {
|
|
fmt.Fprintf(os.Stderr,
|
|
"%s %s: could not scan flag \"%s\" argument \"%s\" as int.\n",
|
|
"mlr", verb, flag, stringArg,
|
|
)
|
|
os.Exit(1)
|
|
}
|
|
return retval
|
|
}
|
|
|
|
// E.g. with ["-n", "10.3"], makes sure there is something in the "10.3"
|
|
// position, scans it as float, and returns it.
|
|
func VerbGetFloatArgOrDie(verb string, opt string, args []string, pargi *int, argc int) float64 {
|
|
flag := args[*pargi]
|
|
stringArg := VerbGetStringArgOrDie(verb, opt, args, pargi, argc)
|
|
retval, err := strconv.ParseFloat(stringArg, 64)
|
|
if err != nil {
|
|
fmt.Fprintf(os.Stderr,
|
|
"%s %s: could not scan flag \"%s\" argument \"%s\" as float.\n",
|
|
"mlr", verb, flag, stringArg,
|
|
)
|
|
os.Exit(1)
|
|
}
|
|
return retval
|
|
}
|