build: move e2e dependencies into e2e/go.mod

Several packages are only used while running the e2e suite. These
packages are less important to update, as the they can not influence the
final executable that is part of the Ceph-CSI container-image.

By moving these dependencies out of the main Ceph-CSI go.mod, it is
easier to identify if a reported CVE affects Ceph-CSI, or only the
testing (like most of the Kubernetes CVEs).

Signed-off-by: Niels de Vos <ndevos@ibm.com>

e2e/vendor/github.com/google/cel-go/common/runes/BUILD.bazel

@@ -0,0 +1,25 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+
+package(
+    default_visibility = ["//visibility:public"],
+    licenses = ["notice"],  # Apache 2.0
+)
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "buffer.go",
+    ],
+    importpath = "github.com/google/cel-go/common/runes",
+)
+
+go_test(
+    name = "go_default_test",
+    size = "small",
+    srcs = [
+        "buffer_test.go",
+    ],
+    embed = [
+        ":go_default_library",
+    ],
+)

e2e/vendor/github.com/google/cel-go/common/runes/buffer.go

@@ -0,0 +1,242 @@
+// Copyright 2021 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package runes provides interfaces and utilities for working with runes.
+package runes
+
+import (
+	"strings"
+	"unicode/utf8"
+)
+
+// Buffer is an interface for accessing a contiguous array of code points.
+type Buffer interface {
+	Get(i int) rune
+	Slice(i, j int) string
+	Len() int
+}
+
+type emptyBuffer struct{}
+
+func (e *emptyBuffer) Get(i int) rune {
+	panic("slice index out of bounds")
+}
+
+func (e *emptyBuffer) Slice(i, j int) string {
+	if i != 0 || i != j {
+		panic("slice index out of bounds")
+	}
+	return ""
+}
+
+func (e *emptyBuffer) Len() int {
+	return 0
+}
+
+var _ Buffer = &emptyBuffer{}
+
+// asciiBuffer is an implementation for an array of code points that contain code points only from
+// the ASCII character set.
+type asciiBuffer struct {
+	arr []byte
+}
+
+func (a *asciiBuffer) Get(i int) rune {
+	return rune(uint32(a.arr[i]))
+}
+
+func (a *asciiBuffer) Slice(i, j int) string {
+	return string(a.arr[i:j])
+}
+
+func (a *asciiBuffer) Len() int {
+	return len(a.arr)
+}
+
+var _ Buffer = &asciiBuffer{}
+
+// basicBuffer is an implementation for an array of code points that contain code points from both
+// the Latin-1 character set and Basic Multilingual Plane.
+type basicBuffer struct {
+	arr []uint16
+}
+
+func (b *basicBuffer) Get(i int) rune {
+	return rune(uint32(b.arr[i]))
+}
+
+func (b *basicBuffer) Slice(i, j int) string {
+	var str strings.Builder
+	str.Grow((j - i) * 3) // Worst case encoding size for 0xffff is 3.
+	for ; i < j; i++ {
+		str.WriteRune(rune(uint32(b.arr[i])))
+	}
+	return str.String()
+}
+
+func (b *basicBuffer) Len() int {
+	return len(b.arr)
+}
+
+var _ Buffer = &basicBuffer{}
+
+// supplementalBuffer is an implementation for an array of code points that contain code points from
+// the Latin-1 character set, Basic Multilingual Plane, or the Supplemental Multilingual Plane.
+type supplementalBuffer struct {
+	arr []rune
+}
+
+func (s *supplementalBuffer) Get(i int) rune {
+	return rune(uint32(s.arr[i]))
+}
+
+func (s *supplementalBuffer) Slice(i, j int) string {
+	return string(s.arr[i:j])
+}
+
+func (s *supplementalBuffer) Len() int {
+	return len(s.arr)
+}
+
+var _ Buffer = &supplementalBuffer{}
+
+var nilBuffer = &emptyBuffer{}
+
+// NewBuffer returns an efficient implementation of Buffer for the given text based on the ranges of
+// the encoded code points contained within.
+//
+// Code points are represented as an array of byte, uint16, or rune. This approach ensures that
+// each index represents a code point by itself without needing to use an array of rune. At first
+// we assume all code points are less than or equal to '\u007f'. If this holds true, the
+// underlying storage is a byte array containing only ASCII characters. If we encountered a code
+// point above this range but less than or equal to '\uffff' we allocate a uint16 array, copy the
+// elements of previous byte array to the uint16 array, and continue. If this holds true, the
+// underlying storage is a uint16 array containing only Unicode characters in the Basic Multilingual
+// Plane. If we encounter a code point above '\uffff' we allocate an rune array, copy the previous
+// elements of the byte or uint16 array, and continue. The underlying storage is an rune array
+// containing any Unicode character.
+func NewBuffer(data string) Buffer {
+	buf, _ := newBuffer(data, false)
+	return buf
+}
+
+// NewBufferAndLineOffsets returns an efficient implementation of Buffer for the given text based on
+// the ranges of the encoded code points contained within, as well as returning the line offsets.
+//
+// Code points are represented as an array of byte, uint16, or rune. This approach ensures that
+// each index represents a code point by itself without needing to use an array of rune. At first
+// we assume all code points are less than or equal to '\u007f'. If this holds true, the
+// underlying storage is a byte array containing only ASCII characters. If we encountered a code
+// point above this range but less than or equal to '\uffff' we allocate a uint16 array, copy the
+// elements of previous byte array to the uint16 array, and continue. If this holds true, the
+// underlying storage is a uint16 array containing only Unicode characters in the Basic Multilingual
+// Plane. If we encounter a code point above '\uffff' we allocate an rune array, copy the previous
+// elements of the byte or uint16 array, and continue. The underlying storage is an rune array
+// containing any Unicode character.
+func NewBufferAndLineOffsets(data string) (Buffer, []int32) {
+	return newBuffer(data, true)
+}
+
+func newBuffer(data string, lines bool) (Buffer, []int32) {
+	if len(data) == 0 {
+		return nilBuffer, []int32{0}
+	}
+	var (
+		idx         = 0
+		off   int32 = 0
+		buf8        = make([]byte, 0, len(data))
+		buf16 []uint16
+		buf32 []rune
+		offs  []int32
+	)
+	for idx < len(data) {
+		r, s := utf8.DecodeRuneInString(data[idx:])
+		idx += s
+		if lines && r == '\n' {
+			offs = append(offs, off+1)
+		}
+		if r < utf8.RuneSelf {
+			buf8 = append(buf8, byte(r))
+			off++
+			continue
+		}
+		if r <= 0xffff {
+			buf16 = make([]uint16, len(buf8), len(data))
+			for i, v := range buf8 {
+				buf16[i] = uint16(v)
+			}
+			buf8 = nil
+			buf16 = append(buf16, uint16(r))
+			off++
+			goto copy16
+		}
+		buf32 = make([]rune, len(buf8), len(data))
+		for i, v := range buf8 {
+			buf32[i] = rune(uint32(v))
+		}
+		buf8 = nil
+		buf32 = append(buf32, r)
+		off++
+		goto copy32
+	}
+	if lines {
+		offs = append(offs, off+1)
+	}
+	return &asciiBuffer{
+		arr: buf8,
+	}, offs
+copy16:
+	for idx < len(data) {
+		r, s := utf8.DecodeRuneInString(data[idx:])
+		idx += s
+		if lines && r == '\n' {
+			offs = append(offs, off+1)
+		}
+		if r <= 0xffff {
+			buf16 = append(buf16, uint16(r))
+			off++
+			continue
+		}
+		buf32 = make([]rune, len(buf16), len(data))
+		for i, v := range buf16 {
+			buf32[i] = rune(uint32(v))
+		}
+		buf16 = nil
+		buf32 = append(buf32, r)
+		off++
+		goto copy32
+	}
+	if lines {
+		offs = append(offs, off+1)
+	}
+	return &basicBuffer{
+		arr: buf16,
+	}, offs
+copy32:
+	for idx < len(data) {
+		r, s := utf8.DecodeRuneInString(data[idx:])
+		idx += s
+		if lines && r == '\n' {
+			offs = append(offs, off+1)
+		}
+		buf32 = append(buf32, r)
+		off++
+	}
+	if lines {
+		offs = append(offs, off+1)
+	}
+	return &supplementalBuffer{
+		arr: buf32,
+	}, offs
+}