use istio client-go library instead of knative (#1661)

use istio client-go library instead of knative
bump kubernetes dependency version
change code coverage to codecov

vendor/sigs.k8s.io/controller-tools/pkg/genall/help/pretty/table.go

@@ -0,0 +1,64 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+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 pretty
+
+// TableCalculator calculates column widths (with optional padding)
+// for a table based on the maximum required column width.
+type TableCalculator struct {
+	cellSizesByCol [][]int
+
+	Padding  int
+	MaxWidth int
+}
+
+// AddRowSizes registers a new row with cells of the given sizes.
+func (c *TableCalculator) AddRowSizes(cellSizes ...int) {
+	if len(cellSizes) > len(c.cellSizesByCol) {
+		for range cellSizes[len(c.cellSizesByCol):] {
+			c.cellSizesByCol = append(c.cellSizesByCol, []int(nil))
+		}
+	}
+	for i, size := range cellSizes {
+		c.cellSizesByCol[i] = append(c.cellSizesByCol[i], size)
+	}
+}
+
+// ColumnWidths calculates the appropriate column sizes given the
+// previously registered rows.
+func (c *TableCalculator) ColumnWidths() []int {
+	maxColWidths := make([]int, len(c.cellSizesByCol))
+
+	for colInd, cellSizes := range c.cellSizesByCol {
+		max := 0
+		for _, cellSize := range cellSizes {
+			if max < cellSize {
+				max = cellSize
+			}
+		}
+		maxColWidths[colInd] = max
+	}
+
+	actualMaxWidth := c.MaxWidth - c.Padding
+	for i, width := range maxColWidths {
+		if actualMaxWidth > 0 && width > actualMaxWidth {
+			maxColWidths[i] = actualMaxWidth
+		}
+		maxColWidths[i] += c.Padding
+	}
+
+	return maxColWidths
+}