CHORE: Vendor go-powershell (#2837)

pkg/powershell/utils/quote.go

@@ -0,0 +1,9 @@
+// Copyright (c) 2017 Gorillalabs. All rights reserved.
+
+package utils
+
+import "strings"
+
+func QuoteArg(s string) string {
+	return "'" + strings.Replace(s, "'", "\"", -1) + "'"
+}

pkg/powershell/utils/quote_test.go

@@ -0,0 +1,28 @@
+// Copyright (c) 2017 Gorillalabs. All rights reserved.
+
+package utils
+
+import "testing"
+
+func TestQuotingArguments(t *testing.T) {
+	testcases := [][]string{
+		{"", "''"},
+		{"test", "'test'"},
+		{"two words", "'two words'"},
+		{"quo\"ted", "'quo\"ted'"},
+		{"quo'ted", "'quo\"ted'"},
+		{"quo\\'ted", "'quo\\\"ted'"},
+		{"quo\"t'ed", "'quo\"t\"ed'"},
+		{"es\\caped", "'es\\caped'"},
+		{"es`caped", "'es`caped'"},
+		{"es\\`caped", "'es\\`caped'"},
+	}
+
+	for i, testcase := range testcases {
+		quoted := QuoteArg(testcase[0])
+
+		if quoted != testcase[1] {
+			t.Errorf("test %02d failed: input '%s', expected %s, actual %s", i+1, testcase[0], testcase[1], quoted)
+		}
+	}
+}

pkg/powershell/utils/rand.go

@@ -0,0 +1,20 @@
+// Copyright (c) 2017 Gorillalabs. All rights reserved.
+
+package utils
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+)
+
+func CreateRandomString(bytes int) string {
+	c := bytes
+	b := make([]byte, c)
+
+	_, err := rand.Read(b)
+	if err != nil {
+		panic(err)
+	}
+
+	return hex.EncodeToString(b)
+}

pkg/powershell/utils/rand_test.go

@@ -0,0 +1,16 @@
+// Copyright (c) 2017 Gorillalabs. All rights reserved.
+
+package utils
+
+import "testing"
+
+func TestRandomStrings(t *testing.T) {
+	r1 := CreateRandomString(8)
+	r2 := CreateRandomString(8)
+
+	if r1 == r2 {
+		t.Error("Failed to create random strings: The two generated strings are identical.")
+	} else if len(r1) != 16 {
+		t.Errorf("Expected the random string to contain 16 characters, but got %d.", len(r1))
+	}
+}