Add vendor directory and update vendorHash to null

vendor/github.com/pressly/goose/v3/helpers.go

@@ -0,0 +1,84 @@
+package goose
+
+import (
+	"bytes"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+)
+
+type camelSnakeStateMachine int
+
+const ( //                                           _$$_This is some text, OK?!
+	idle          camelSnakeStateMachine = iota // 0 ↑                     ↑   ↑
+	firstAlphaNum                               // 1     ↑    ↑  ↑    ↑     ↑
+	alphaNum                                    // 2      ↑↑↑  ↑  ↑↑↑  ↑↑↑   ↑
+	delimiter                                   // 3         ↑  ↑    ↑    ↑   ↑
+)
+
+func (s camelSnakeStateMachine) next(r rune) camelSnakeStateMachine {
+	switch s {
+	case idle:
+		if isAlphaNum(r) {
+			return firstAlphaNum
+		}
+	case firstAlphaNum:
+		if isAlphaNum(r) {
+			return alphaNum
+		}
+		return delimiter
+	case alphaNum:
+		if !isAlphaNum(r) {
+			return delimiter
+		}
+	case delimiter:
+		if isAlphaNum(r) {
+			return firstAlphaNum
+		}
+		return idle
+	}
+	return s
+}
+
+func camelCase(str string) string {
+	var b strings.Builder
+
+	stateMachine := idle
+	for i := 0; i < len(str); {
+		r, size := utf8.DecodeRuneInString(str[i:])
+		i += size
+		stateMachine = stateMachine.next(r)
+		switch stateMachine {
+		case firstAlphaNum:
+			b.WriteRune(unicode.ToUpper(r))
+		case alphaNum:
+			b.WriteRune(unicode.ToLower(r))
+		}
+	}
+	return b.String()
+}
+
+func snakeCase(str string) string {
+	var b bytes.Buffer
+
+	stateMachine := idle
+	for i := 0; i < len(str); {
+		r, size := utf8.DecodeRuneInString(str[i:])
+		i += size
+		stateMachine = stateMachine.next(r)
+		switch stateMachine {
+		case firstAlphaNum, alphaNum:
+			b.WriteRune(unicode.ToLower(r))
+		case delimiter:
+			b.WriteByte('_')
+		}
+	}
+	if stateMachine == idle {
+		return string(bytes.TrimSuffix(b.Bytes(), []byte{'_'}))
+	}
+	return b.String()
+}
+
+func isAlphaNum(r rune) bool {
+	return unicode.IsLetter(r) || unicode.IsNumber(r)
+}