Rename commands utility function file

pkg/commands/util/util.go

@@ -0,0 +1,62 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package util
+
+import (
+	"fmt"
+	"log"
+	"strings"
+
+	"sigs.k8s.io/kustomize/v3/pkg/fs"
+)
+
+// GlobPatterns accepts a slice of glob strings and returns the set of
+// matching file paths.
+func GlobPatterns(fsys fs.FileSystem, patterns []string) ([]string, error) {
+	var result []string
+	for _, pattern := range patterns {
+		files, err := fsys.Glob(pattern)
+		if err != nil {
+			return nil, err
+		}
+		if len(files) == 0 {
+			log.Printf("%s has no match", pattern)
+			continue
+		}
+		result = append(result, files...)
+	}
+	return result, nil
+}
+
+// ConvertToMap converts a slice of strings in the form of
+// `key:value` into a map.
+func ConvertToMap(input string, kind string) (map[string]string, error) {
+	result := make(map[string]string)
+	inputs := strings.Split(input, ",")
+	for _, input := range inputs {
+		c := strings.Index(input, ":")
+		if c == 0 {
+			// key is not passed
+			return nil, fmt.Errorf("invalid %s: '%s' (%s)", kind, input, "need k:v pair where v may be quoted")
+		} else if c < 0 {
+			// only key passed
+			result[input] = ""
+		} else {
+			// both key and value passed
+			key := input[:c]
+			value := trimQuotes(input[c+1:])
+			result[key] = value
+		}
+	}
+	return result, nil
+}
+
+func trimQuotes(s string) string {
+	if len(s) >= 2 {
+		if s[0] == '"' && s[len(s)-1] == '"' {
+			return s[1 : len(s)-1]
+		}
+	}
+	return s
+}