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>

vendor/gomodules.xyz/jsonpatch/v2/jsonpatch.go

@@ -24,21 +24,28 @@ func (j *Operation) Json() string {
 }
 
 func (j *Operation) MarshalJSON() ([]byte, error) {
-	var b bytes.Buffer
-	b.WriteString("{")
-	b.WriteString(fmt.Sprintf(`"op":"%s"`, j.Operation))
-	b.WriteString(fmt.Sprintf(`,"path":"%s"`, j.Path))
-	// Consider omitting Value for non-nullable operations.
-	if j.Value != nil || j.Operation == "replace" || j.Operation == "add" {
-		v, err := json.Marshal(j.Value)
-		if err != nil {
-			return nil, err
-		}
-		b.WriteString(`,"value":`)
-		b.Write(v)
+	// Ensure for add and replace we emit `value: null`
+	if j.Value == nil && (j.Operation == "replace" || j.Operation == "add") {
+		return json.Marshal(struct {
+			Operation string      `json:"op"`
+			Path      string      `json:"path"`
+			Value     interface{} `json:"value"`
+		}{
+			Operation: j.Operation,
+			Path:      j.Path,
+		})
 	}
-	b.WriteString("}")
-	return b.Bytes(), nil
+	// otherwise just marshal normally. We cannot literally do json.Marshal(j) as it would be recursively
+	// calling this function.
+	return json.Marshal(struct {
+		Operation string      `json:"op"`
+		Path      string      `json:"path"`
+		Value     interface{} `json:"value,omitempty"`
+	}{
+		Operation: j.Operation,
+		Path:      j.Path,
+		Value:     j.Value,
+	})
 }
 
 type ByPath []Operation
@@ -58,6 +65,9 @@ func NewOperation(op, path string, value interface{}) Operation {
 //
 // An error will be returned if any of the two documents are invalid.
 func CreatePatch(a, b []byte) ([]Operation, error) {
+	if bytes.Equal(a, b) {
+		return []Operation{}, nil
+	}
 	var aI interface{}
 	var bI interface{}
 	err := json.Unmarshal(a, &aI)
@@ -149,9 +159,6 @@ func makePath(path string, newPart interface{}) string {
 	if path == "" {
 		return "/" + key
 	}
-	if strings.HasSuffix(path, "/") {
-		return path + key
-	}
 	return path + "/" + key
 }
 
@@ -211,22 +218,18 @@ func handleValues(av, bv interface{}, p string, patch []Operation) ([]Operation,
 		}
 	case []interface{}:
 		bt := bv.([]interface{})
-		if isSimpleArray(at) && isSimpleArray(bt) {
-			patch = append(patch, compareEditDistance(at, bt, p)...)
-		} else {
-			n := min(len(at), len(bt))
-			for i := len(at) - 1; i >= n; i-- {
-				patch = append(patch, NewOperation("remove", makePath(p, i), nil))
-			}
-			for i := n; i < len(bt); i++ {
-				patch = append(patch, NewOperation("add", makePath(p, i), bt[i]))
-			}
-			for i := 0; i < n; i++ {
-				var err error
-				patch, err = handleValues(at[i], bt[i], makePath(p, i), patch)
-				if err != nil {
-					return nil, err
-				}
+		n := min(len(at), len(bt))
+		for i := len(at) - 1; i >= n; i-- {
+			patch = append(patch, NewOperation("remove", makePath(p, i), nil))
+		}
+		for i := n; i < len(bt); i++ {
+			patch = append(patch, NewOperation("add", makePath(p, i), bt[i]))
+		}
+		for i := 0; i < n; i++ {
+			var err error
+			patch, err = handleValues(at[i], bt[i], makePath(p, i), patch)
+			if err != nil {
+				return nil, err
 			}
 		}
 	default:
@@ -235,100 +238,9 @@ func handleValues(av, bv interface{}, p string, patch []Operation) ([]Operation,
 	return patch, nil
 }
 
-func isBasicType(a interface{}) bool {
-	switch a.(type) {
-	case string, float64, bool:
-	default:
-		return false
-	}
-	return true
-}
-
-func isSimpleArray(a []interface{}) bool {
-	for i := range a {
-		switch a[i].(type) {
-		case string, float64, bool:
-		default:
-			val := reflect.ValueOf(a[i])
-			if val.Kind() == reflect.Map {
-				for _, k := range val.MapKeys() {
-					av := val.MapIndex(k)
-					if av.Kind() == reflect.Ptr || av.Kind() == reflect.Interface {
-						if av.IsNil() {
-							continue
-						}
-						av = av.Elem()
-					}
-					if av.Kind() != reflect.String && av.Kind() != reflect.Float64 && av.Kind() != reflect.Bool {
-						return false
-					}
-				}
-				return true
-			}
-			return false
-		}
-	}
-	return true
-}
-
-// https://en.wikipedia.org/wiki/Wagner%E2%80%93Fischer_algorithm
-// Adapted from https://github.com/texttheater/golang-levenshtein
-func compareEditDistance(s, t []interface{}, p string) []Operation {
-	m := len(s)
-	n := len(t)
-
-	d := make([][]int, m+1)
-	for i := 0; i <= m; i++ {
-		d[i] = make([]int, n+1)
-		d[i][0] = i
-	}
-	for j := 0; j <= n; j++ {
-		d[0][j] = j
-	}
-
-	for j := 1; j <= n; j++ {
-		for i := 1; i <= m; i++ {
-			if reflect.DeepEqual(s[i-1], t[j-1]) {
-				d[i][j] = d[i-1][j-1] // no op required
-			} else {
-				del := d[i-1][j] + 1
-				add := d[i][j-1] + 1
-				rep := d[i-1][j-1] + 1
-				d[i][j] = min(rep, min(add, del))
-			}
-		}
-	}
-
-	return backtrace(s, t, p, m, n, d)
-}
-
 func min(x int, y int) int {
 	if y < x {
 		return y
 	}
 	return x
 }
-
-func backtrace(s, t []interface{}, p string, i int, j int, matrix [][]int) []Operation {
-	if i > 0 && matrix[i-1][j]+1 == matrix[i][j] {
-		op := NewOperation("remove", makePath(p, i-1), nil)
-		return append([]Operation{op}, backtrace(s, t, p, i-1, j, matrix)...)
-	}
-	if j > 0 && matrix[i][j-1]+1 == matrix[i][j] {
-		op := NewOperation("add", makePath(p, i), t[j-1])
-		return append([]Operation{op}, backtrace(s, t, p, i, j-1, matrix)...)
-	}
-	if i > 0 && j > 0 && matrix[i-1][j-1]+1 == matrix[i][j] {
-		if isBasicType(s[0]) {
-			op := NewOperation("replace", makePath(p, i-1), t[j-1])
-			return append([]Operation{op}, backtrace(s, t, p, i-1, j-1, matrix)...)
-		}
-
-		p2, _ := handleValues(s[i-1], t[j-1], makePath(p, i-1), []Operation{})
-		return append(p2, backtrace(s, t, p, i-1, j-1, matrix)...)
-	}
-	if i > 0 && j > 0 && matrix[i-1][j-1] == matrix[i][j] {
-		return backtrace(s, t, p, i-1, j-1, matrix)
-	}
-	return []Operation{}
-}