Upgrading server dependancies (#8154)

vendor/github.com/pmezard/go-difflib/difflib/difflib.go

@@ -559,10 +559,14 @@ type UnifiedDiff struct {
 func WriteUnifiedDiff(writer io.Writer, diff UnifiedDiff) error {
 	buf := bufio.NewWriter(writer)
 	defer buf.Flush()
-	w := func(format string, args ...interface{}) error {
+	wf := func(format string, args ...interface{}) error {
 		_, err := buf.WriteString(fmt.Sprintf(format, args...))
 		return err
 	}
+	ws := func(s string) error {
+		_, err := buf.WriteString(s)
+		return err
+	}
 
 	if len(diff.Eol) == 0 {
 		diff.Eol = "\n"
@@ -581,26 +585,28 @@ func WriteUnifiedDiff(writer io.Writer, diff UnifiedDiff) error {
 			if len(diff.ToDate) > 0 {
 				toDate = "\t" + diff.ToDate
 			}
-			err := w("--- %s%s%s", diff.FromFile, fromDate, diff.Eol)
-			if err != nil {
-				return err
-			}
-			err = w("+++ %s%s%s", diff.ToFile, toDate, diff.Eol)
-			if err != nil {
-				return err
+			if diff.FromFile != "" || diff.ToFile != "" {
+				err := wf("--- %s%s%s", diff.FromFile, fromDate, diff.Eol)
+				if err != nil {
+					return err
+				}
+				err = wf("+++ %s%s%s", diff.ToFile, toDate, diff.Eol)
+				if err != nil {
+					return err
+				}
 			}
 		}
 		first, last := g[0], g[len(g)-1]
 		range1 := formatRangeUnified(first.I1, last.I2)
 		range2 := formatRangeUnified(first.J1, last.J2)
-		if err := w("@@ -%s +%s @@%s", range1, range2, diff.Eol); err != nil {
+		if err := wf("@@ -%s +%s @@%s", range1, range2, diff.Eol); err != nil {
 			return err
 		}
 		for _, c := range g {
 			i1, i2, j1, j2 := c.I1, c.I2, c.J1, c.J2
 			if c.Tag == 'e' {
 				for _, line := range diff.A[i1:i2] {
-					if err := w(" " + line); err != nil {
+					if err := ws(" " + line); err != nil {
 						return err
 					}
 				}
@@ -608,14 +614,14 @@ func WriteUnifiedDiff(writer io.Writer, diff UnifiedDiff) error {
 			}
 			if c.Tag == 'r' || c.Tag == 'd' {
 				for _, line := range diff.A[i1:i2] {
-					if err := w("-" + line); err != nil {
+					if err := ws("-" + line); err != nil {
 						return err
 					}
 				}
 			}
 			if c.Tag == 'r' || c.Tag == 'i' {
 				for _, line := range diff.B[j1:j2] {
-					if err := w("+" + line); err != nil {
+					if err := ws("+" + line); err != nil {
 						return err
 					}
 				}
@@ -669,12 +675,18 @@ func WriteContextDiff(writer io.Writer, diff ContextDiff) error {
 	buf := bufio.NewWriter(writer)
 	defer buf.Flush()
 	var diffErr error
-	w := func(format string, args ...interface{}) {
+	wf := func(format string, args ...interface{}) {
 		_, err := buf.WriteString(fmt.Sprintf(format, args...))
 		if diffErr == nil && err != nil {
 			diffErr = err
 		}
 	}
+	ws := func(s string) {
+		_, err := buf.WriteString(s)
+		if diffErr == nil && err != nil {
+			diffErr = err
+		}
+	}
 
 	if len(diff.Eol) == 0 {
 		diff.Eol = "\n"
@@ -700,15 +712,17 @@ func WriteContextDiff(writer io.Writer, diff ContextDiff) error {
 			if len(diff.ToDate) > 0 {
 				toDate = "\t" + diff.ToDate
 			}
-			w("*** %s%s%s", diff.FromFile, fromDate, diff.Eol)
-			w("--- %s%s%s", diff.ToFile, toDate, diff.Eol)
+			if diff.FromFile != "" || diff.ToFile != "" {
+				wf("*** %s%s%s", diff.FromFile, fromDate, diff.Eol)
+				wf("--- %s%s%s", diff.ToFile, toDate, diff.Eol)
+			}
 		}
 
 		first, last := g[0], g[len(g)-1]
-		w("***************" + diff.Eol)
+		ws("***************" + diff.Eol)
 
 		range1 := formatRangeContext(first.I1, last.I2)
-		w("*** %s ****%s", range1, diff.Eol)
+		wf("*** %s ****%s", range1, diff.Eol)
 		for _, c := range g {
 			if c.Tag == 'r' || c.Tag == 'd' {
 				for _, cc := range g {
@@ -716,7 +730,7 @@ func WriteContextDiff(writer io.Writer, diff ContextDiff) error {
 						continue
 					}
 					for _, line := range diff.A[cc.I1:cc.I2] {
-						w(prefix[cc.Tag] + line)
+						ws(prefix[cc.Tag] + line)
 					}
 				}
 				break
@@ -724,7 +738,7 @@ func WriteContextDiff(writer io.Writer, diff ContextDiff) error {
 		}
 
 		range2 := formatRangeContext(first.J1, last.J2)
-		w("--- %s ----%s", range2, diff.Eol)
+		wf("--- %s ----%s", range2, diff.Eol)
 		for _, c := range g {
 			if c.Tag == 'r' || c.Tag == 'i' {
 				for _, cc := range g {
@@ -732,7 +746,7 @@ func WriteContextDiff(writer io.Writer, diff ContextDiff) error {
 						continue
 					}
 					for _, line := range diff.B[cc.J1:cc.J2] {
-						w(prefix[cc.Tag] + line)
+						ws(prefix[cc.Tag] + line)
 					}
 				}
 				break

vendor/github.com/pmezard/go-difflib/difflib/difflib_test.go

@@ -102,11 +102,12 @@ group
 	}
 }
 
-func ExampleGetUnifiedDiffString() {
+func ExampleGetUnifiedDiffCode() {
 	a := `one
 two
 three
-four`
+four
+fmt.Printf("%s,%T",a,b)`
 	b := `zero
 one
 three
@@ -121,16 +122,54 @@ four`
 		Context:  3,
 	}
 	result, _ := GetUnifiedDiffString(diff)
-	fmt.Printf(strings.Replace(result, "\t", " ", -1))
+	fmt.Println(strings.Replace(result, "\t", " ", -1))
 	// Output:
 	// --- Original 2005-01-26 23:30:50
 	// +++ Current 2010-04-02 10:20:52
-	// @@ -1,4 +1,4 @@
+	// @@ -1,5 +1,4 @@
 	// +zero
 	//  one
 	// -two
 	//  three
 	//  four
+	// -fmt.Printf("%s,%T",a,b)
+}
+
+func ExampleGetContextDiffCode() {
+	a := `one
+two
+three
+four
+fmt.Printf("%s,%T",a,b)`
+	b := `zero
+one
+tree
+four`
+	diff := ContextDiff{
+		A:        SplitLines(a),
+		B:        SplitLines(b),
+		FromFile: "Original",
+		ToFile:   "Current",
+		Context:  3,
+		Eol:      "\n",
+	}
+	result, _ := GetContextDiffString(diff)
+	fmt.Print(strings.Replace(result, "\t", " ", -1))
+	// Output:
+	// *** Original
+	// --- Current
+	// ***************
+	// *** 1,5 ****
+	//   one
+	// ! two
+	// ! three
+	//   four
+	// - fmt.Printf("%s,%T",a,b)
+	// --- 1,4 ----
+	// + zero
+	//   one
+	// ! tree
+	//   four
 }
 
 func ExampleGetContextDiffString() {
@@ -318,6 +357,41 @@ func TestOutputFormatNoTrailingTabOnEmptyFiledate(t *testing.T) {
 	assertEqual(t, SplitLines(cd)[:2], []string{"*** Original\n", "--- Current\n"})
 }
 
+func TestOmitFilenames(t *testing.T) {
+	diff := UnifiedDiff{
+		A:   SplitLines("o\nn\ne\n"),
+		B:   SplitLines("t\nw\no\n"),
+		Eol: "\n",
+	}
+	ud, err := GetUnifiedDiffString(diff)
+	assertEqual(t, err, nil)
+	assertEqual(t, SplitLines(ud), []string{
+		"@@ -0,0 +1,2 @@\n",
+		"+t\n",
+		"+w\n",
+		"@@ -2,2 +3,0 @@\n",
+		"-n\n",
+		"-e\n",
+		"\n",
+	})
+
+	cd, err := GetContextDiffString(ContextDiff(diff))
+	assertEqual(t, err, nil)
+	assertEqual(t, SplitLines(cd), []string{
+		"***************\n",
+		"*** 0 ****\n",
+		"--- 1,2 ----\n",
+		"+ t\n",
+		"+ w\n",
+		"***************\n",
+		"*** 2,3 ****\n",
+		"- n\n",
+		"- e\n",
+		"--- 3 ----\n",
+		"\n",
+	})
+}
+
 func TestSplitLines(t *testing.T) {
 	allTests := []struct {
 		input string