[no-relnote] Migrate to urfave v3

Signed-off-by: Carlos Eduardo Arango Gutierrez <eduardoa@nvidia.com>

vendor/github.com/urfave/cli/v3/docs.go

@@ -0,0 +1,125 @@
+package cli
+
+import (
+	"fmt"
+	"os"
+	"runtime"
+	"strings"
+)
+
+func prefixFor(name string) (prefix string) {
+	if len(name) == 1 {
+		prefix = "-"
+	} else {
+		prefix = "--"
+	}
+
+	return
+}
+
+// Returns the placeholder, if any, and the unquoted usage string.
+func unquoteUsage(usage string) (string, string) {
+	for i := 0; i < len(usage); i++ {
+		if usage[i] == '`' {
+			for j := i + 1; j < len(usage); j++ {
+				if usage[j] == '`' {
+					name := usage[i+1 : j]
+					usage = usage[:i] + name + usage[j+1:]
+					return name, usage
+				}
+			}
+			break
+		}
+	}
+	return "", usage
+}
+
+func prefixedNames(names []string, placeholder string) string {
+	var prefixed string
+	for i, name := range names {
+		if name == "" {
+			continue
+		}
+
+		prefixed += prefixFor(name) + name
+		if placeholder != "" {
+			prefixed += " " + placeholder
+		}
+		if i < len(names)-1 {
+			prefixed += ", "
+		}
+	}
+	return prefixed
+}
+
+func envFormat(envVars []string, prefix, sep, suffix string) string {
+	if len(envVars) > 0 {
+		return fmt.Sprintf(" [%s%s%s]", prefix, strings.Join(envVars, sep), suffix)
+	}
+	return ""
+}
+
+func defaultEnvFormat(envVars []string) string {
+	return envFormat(envVars, "$", ", $", "")
+}
+
+func withEnvHint(envVars []string, str string) string {
+	envText := ""
+	if runtime.GOOS != "windows" || os.Getenv("PSHOME") != "" {
+		envText = defaultEnvFormat(envVars)
+	} else {
+		envText = envFormat(envVars, "%", "%, %", "%")
+	}
+	return str + envText
+}
+
+func withFileHint(filePath, str string) string {
+	fileText := ""
+	if filePath != "" {
+		fileText = fmt.Sprintf(" [%s]", filePath)
+	}
+	return str + fileText
+}
+
+func formatDefault(format string) string {
+	return " (default: " + format + ")"
+}
+
+func stringifyFlag(f Flag) string {
+	// enforce DocGeneration interface on flags to avoid reflection
+	df, ok := f.(DocGenerationFlag)
+	if !ok {
+		return ""
+	}
+	placeholder, usage := unquoteUsage(df.GetUsage())
+	needsPlaceholder := df.TakesValue()
+	// if needsPlaceholder is true, placeholder is empty
+	if needsPlaceholder && placeholder == "" {
+		// try to get type from flag
+		if tname := df.TypeName(); tname != "" {
+			placeholder = tname
+		} else {
+			placeholder = defaultPlaceholder
+		}
+	}
+
+	defaultValueString := ""
+
+	// don't print default text for required flags
+	if rf, ok := f.(RequiredFlag); !ok || !rf.IsRequired() {
+		isVisible := df.IsDefaultVisible()
+		if s := df.GetDefaultText(); isVisible && s != "" {
+			defaultValueString = fmt.Sprintf(formatDefault("%s"), s)
+		}
+	}
+
+	usageWithDefault := strings.TrimSpace(usage + defaultValueString)
+
+	pn := prefixedNames(f.Names(), placeholder)
+	sliceFlag, ok := f.(DocGenerationMultiValueFlag)
+	if ok && sliceFlag.IsMultiValueFlag() {
+		pn = pn + " [ " + pn + " ]"
+	}
+
+	return withEnvHint(df.GetEnvVars(), fmt.Sprintf("%s\t%s", pn, usageWithDefault))
+}