Function ParseFileFlag

internal/cmdutil/fileupload.go:22–34

ParseFileFlag parses a --file flag value into its components. The format is either "path" or "field=path". When no explicit "field=" prefix is present, defaultField is used as the field name. A path of "-" indicates stdin; in that case filePath is empty and isStdin is true.

(raw, defaultField string)

// prefix is present, defaultField is used as the field name.
// A path of "-" indicates stdin; in that case filePath is empty and isStdin is true.
func ParseFileFlag(raw, defaultField string) (fieldName, filePath string, isStdin bool) {
	if idx := strings.IndexByte(raw, '='); idx > 0 {
		fieldName = raw[:idx]
		filePath = raw[idx+1:]
	} else {
		fieldName = defaultField
		filePath = raw
	}
	if filePath == "-" {
		return fieldName, "", true
	}
	return fieldName, filePath, false
}

// ValidateFileFlag checks mutual exclusion rules for the --file flag.
// Returns nil if file is empty (flag not provided).