troubleshoot: make output have tables and colors (#16235)

Adds tables and colors using libraries used in consul-k8s. It doesn't add the full `terminal` UI package that consul-k8s uses since there is an existing UI in Consul that I didn't want to affect too much. So instead this adds to the existing UI.

command/agent/agent_test.go

@@ -9,7 +9,8 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/mitchellh/cli"
+	"github.com/hashicorp/consul/command/cli"
+	mcli "github.com/mitchellh/cli"
 
 	"github.com/hashicorp/consul/agent"
 	"github.com/hashicorp/consul/sdk/testutil"
@@ -215,7 +216,7 @@ func TestBadDataDirPermissions(t *testing.T) {
 }
 
 type captureUI struct {
-	*cli.MockUi
+	*mcli.MockUi
 }
 
 func (c *captureUI) Stdout() io.Writer {
@@ -226,6 +227,24 @@ func (c *captureUI) Stderr() io.Writer {
 	return c.MockUi.ErrorWriter
 }
 
-func newCaptureUI() *captureUI {
+func (c *captureUI) HeaderOutput(s string) {
-	return &captureUI{MockUi: cli.NewMockUi()}
+}
+
+func (c *captureUI) ErrorOutput(s string) {
+}
+
+func (c *captureUI) WarnOutput(s string) {
+}
+
+func (c *captureUI) SuccessOutput(s string) {
+}
+
+func (c *captureUI) UnchangedOutput(s string) {
+}
+
+func (c *captureUI) Table(tbl *cli.Table) {
+}
+
+func newCaptureUI() *captureUI {
+	return &captureUI{MockUi: mcli.NewMockUi()}
 }

command/cli/cli.go

@@ -1,8 +1,11 @@
 package cli
 
 import (
+	"fmt"
 	"io"
 
+	"github.com/olekukonko/tablewriter"
+
 	mcli "github.com/mitchellh/cli"
 )
 
@@ -13,6 +16,12 @@ type Ui interface {
 	mcli.Ui
 	Stdout() io.Writer
 	Stderr() io.Writer
+	ErrorOutput(string)
+	HeaderOutput(string)
+	WarnOutput(string)
+	SuccessOutput(string)
+	UnchangedOutput(string)
+	Table(tbl *Table)
 }
 
 // BasicUI augments mitchellh/cli.BasicUi by exposing the underlying io.Writer.
@@ -28,5 +37,63 @@ func (b *BasicUI) Stderr() io.Writer {
 	return b.BasicUi.ErrorWriter
 }
 
+func (b *BasicUI) HeaderOutput(s string) {
+	b.Output(colorize(fmt.Sprintf("==> %s", s), UiColorNone))
+}
+
+func (b *BasicUI) ErrorOutput(s string) {
+	b.Output(colorize(fmt.Sprintf(" ! %s", s), UiColorRed))
+}
+
+func (b *BasicUI) WarnOutput(s string) {
+	b.Output(colorize(fmt.Sprintf(" * %s", s), UiColorYellow))
+}
+
+func (b *BasicUI) SuccessOutput(s string) {
+	b.Output(colorize(fmt.Sprintf(" ✓ %s", s), UiColorGreen))
+}
+
+func (b *BasicUI) UnchangedOutput(s string) {
+	b.Output(colorize(fmt.Sprintf("  %s", s), UiColorNone))
+}
+
 // Command is an alias to reduce the diff. It can be removed at any time.
 type Command mcli.Command
+
+// Table implements UI.
+func (u *BasicUI) Table(tbl *Table) {
+	// Build our config and set our options
+
+	table := tablewriter.NewWriter(u.Stdout())
+
+	table.SetHeader(tbl.Headers)
+	table.SetBorder(false)
+	table.SetAutoWrapText(false)
+	table.SetAutoFormatHeaders(false)
+	table.SetHeaderAlignment(tablewriter.ALIGN_LEFT)
+	table.SetAlignment(tablewriter.ALIGN_LEFT)
+	table.SetCenterSeparator("")
+	table.SetColumnSeparator("")
+	table.SetRowSeparator("")
+	table.SetHeaderLine(false)
+	table.SetTablePadding("\t") // pad with tabs
+	table.SetNoWhiteSpace(true)
+
+	for _, row := range tbl.Rows {
+		colors := make([]tablewriter.Colors, len(row))
+		entries := make([]string, len(row))
+
+		for i, ent := range row {
+			entries[i] = ent.Value
+
+			color, ok := colorMapping[ent.Color]
+			if ok {
+				colors[i] = tablewriter.Colors{color}
+			}
+		}
+
+		table.Rich(entries, colors)
+	}
+
+	table.Render()
+}

command/cli/formatting.go

@@ -0,0 +1,88 @@
+package cli
+
+import (
+	"github.com/fatih/color"
+	"github.com/olekukonko/tablewriter"
+)
+
+// Functions to set up colorized output.
+const (
+	noColor = -1
+)
+
+func colorize(message string, uc UiColor) string {
+	if uc.Code == noColor {
+		return message
+	}
+
+	attr := []color.Attribute{color.Attribute(uc.Code)}
+	if uc.Bold {
+		attr = append(attr, color.Bold)
+	}
+
+	return color.New(attr...).SprintFunc()(message)
+}
+
+// UiColor is a posix shell color code to use.
+type UiColor struct {
+	Code int
+	Bold bool
+}
+
+// A list of colors that are useful. These are all non-bolded by default.
+var (
+	UiColorNone    UiColor = UiColor{noColor, false}
+	UiColorRed             = UiColor{int(color.FgHiRed), false}
+	UiColorGreen           = UiColor{int(color.FgHiGreen), false}
+	UiColorYellow          = UiColor{int(color.FgHiYellow), false}
+	UiColorBlue            = UiColor{int(color.FgHiBlue), false}
+	UiColorMagenta         = UiColor{int(color.FgHiMagenta), false}
+	UiColorCyan            = UiColor{int(color.FgHiCyan), false}
+)
+
+// Functions that are useful for table output.
+const (
+	Yellow = "yellow"
+	Green  = "green"
+	Red    = "red"
+)
+
+var colorMapping = map[string]int{
+	Green:  tablewriter.FgGreenColor,
+	Yellow: tablewriter.FgYellowColor,
+	Red:    tablewriter.FgRedColor,
+}
+
+// Table is passed to UI.Table to provide a nicely formatted table.
+type Table struct {
+	Headers []string
+	Rows    [][]Cell
+}
+
+// Cell is a single entry for a table.
+type Cell struct {
+	Value string
+	Color string
+}
+
+// NewTable creates a new Table structure that can be used with UI.Table.
+func NewTable(headers ...string) *Table {
+	return &Table{
+		Headers: headers,
+	}
+}
+
+// AddRow adds a row to the table.
+func (t *Table) AddRow(cols []string, colors []string) {
+	var row []Cell
+
+	for i, col := range cols {
+		if i < len(colors) {
+			row = append(row, Cell{Value: col, Color: colors[i]})
+		} else {
+			row = append(row, Cell{Value: col})
+		}
+	}
+
+	t.Rows = append(t.Rows, row)
+}

command/troubleshoot/proxy/troubleshoot_proxy.go

@@ -6,9 +6,9 @@ import (
 	"net"
 	"os"
 
+	"github.com/hashicorp/consul/command/cli"
 	"github.com/hashicorp/consul/command/flags"
 	troubleshoot "github.com/hashicorp/consul/troubleshoot/proxy"
-	"github.com/mitchellh/cli"
 )
 
 func New(ui cli.Ui) *cmd {
@@ -86,13 +86,14 @@ func (c *cmd) Run(args []string) int {
 		return 1
 	}
 
+	c.UI.HeaderOutput("Validation")
 	for _, o := range messages {
 		if o.Success {
-			c.UI.Output(o.Message)
+			c.UI.SuccessOutput(o.Message)
 		} else {
-			c.UI.Error(o.Message)
+			c.UI.ErrorOutput(o.Message)
 			if o.PossibleActions != "" {
-				c.UI.Output(o.PossibleActions)
+				c.UI.UnchangedOutput(o.PossibleActions)
 			}
 		}
 	}

command/troubleshoot/proxy/troubleshoot_proxy_test.go

@@ -1,16 +0,0 @@
-package proxy
-
-import (
-	"strings"
-	"testing"
-
-	"github.com/mitchellh/cli"
-)
-
-func TestTroubleshootProxyCommand_noTabs(t *testing.T) {
-	t.Parallel()
-
-	if strings.ContainsRune(New(cli.NewMockUi()).Help(), '\t') {
-		t.Fatal("help has tabs")
-	}
-}

command/troubleshoot/upstreams/troubleshoot_upstreams.go

@@ -5,10 +5,12 @@ import (
 	"fmt"
 	"net"
 	"os"
+	"strconv"
+	"strings"
 
+	"github.com/hashicorp/consul/command/cli"
 	"github.com/hashicorp/consul/command/flags"
 	troubleshoot "github.com/hashicorp/consul/troubleshoot/proxy"
-	"github.com/mitchellh/cli"
 )
 
 func New(ui cli.Ui) *cmd {
@@ -81,9 +83,11 @@ func (c *cmd) Run(args []string) int {
 	}
 
 	c.UI.Output(fmt.Sprintf("\n==> Upstream IPs (transparent proxy only) (%v)", len(upstreamIPs)))
+	tbl := cli.NewTable("IPs ", "Virtual ", "Cluster Names")
 	for _, u := range upstreamIPs {
-		c.UI.Output(fmt.Sprintf("%+v   %v   %+v", u.IPs, u.IsVirtual, u.ClusterNames))
+		tbl.AddRow([]string{formatIPs(u.IPs), strconv.FormatBool(u.IsVirtual), formatClusterNames(u.ClusterNames)}, []string{})
 	}
+	c.UI.Table(tbl)
 
 	c.UI.Output("\nIf you don't see your upstream address or cluster for a transparent proxy upstream:")
 	c.UI.Output("- Check intentions: Tproxy upstreams are configured based on intentions, make sure you " +
@@ -114,3 +118,15 @@ Usage: consul troubleshoot upstreams [options]
     $ consul troubleshoot upstreams
 `
 )
+
+func formatIPs(ips []string) string {
+	return strings.Join(ips, ", ")
+}
+
+func formatClusterNames(names map[string]struct{}) string {
+	var out []string
+	for k := range names {
+		out = append(out, k)
+	}
+	return strings.Join(out, ", ")
+}

command/troubleshoot/upstreams/troubleshoot_upstreams_test.go

@@ -1,16 +0,0 @@
-package upstreams
-
-import (
-	"strings"
-	"testing"
-
-	"github.com/mitchellh/cli"
-)
-
-func TestTroubleshootUpstreamsCommand_noTabs(t *testing.T) {
-	t.Parallel()
-
-	if strings.ContainsRune(New(cli.NewMockUi()).Help(), '\t') {
-		t.Fatal("help has tabs")
-	}
-}

go.mod

@@ -29,6 +29,7 @@ require (
 	github.com/coreos/go-oidc v2.1.0+incompatible
 	github.com/docker/go-connections v0.3.0
 	github.com/envoyproxy/go-control-plane v0.10.2-0.20220325020618-49ff273808a1
+	github.com/fatih/color v1.13.0
 	github.com/fsnotify/fsnotify v1.5.1
 	github.com/go-openapi/runtime v0.24.1
 	github.com/go-openapi/strfmt v0.21.3
@@ -86,6 +87,7 @@ require (
 	github.com/mitchellh/mapstructure v1.5.0
 	github.com/mitchellh/pointerstructure v1.2.1
 	github.com/mitchellh/reflectwalk v1.0.2
+	github.com/olekukonko/tablewriter v0.0.4
 	github.com/patrickmn/go-cache v2.1.0+incompatible
 	github.com/pkg/errors v0.9.1
 	github.com/prometheus/client_golang v1.14.0
@@ -147,7 +149,6 @@ require (
 	github.com/digitalocean/godo v1.10.0 // indirect
 	github.com/dimchansky/utfbom v1.1.0 // indirect
 	github.com/envoyproxy/protoc-gen-validate v0.1.0 // indirect
-	github.com/fatih/color v1.13.0 // indirect
 	github.com/form3tech-oss/jwt-go v3.2.2+incompatible // indirect
 	github.com/go-ole/go-ole v1.2.6 // indirect
 	github.com/go-openapi/analysis v0.21.2 // indirect
@@ -189,6 +190,7 @@ require (
 	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/mattn/go-colorable v0.1.12 // indirect
 	github.com/mattn/go-isatty v0.0.14 // indirect
+	github.com/mattn/go-runewidth v0.0.7 // indirect
 	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
 	github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db // indirect
 	github.com/mitchellh/go-homedir v1.1.0 // indirect

go.sum

@@ -743,6 +743,8 @@ github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27k
 github.com/mattn/go-runewidth v0.0.2/go.mod h1:LwmH8dsx7+W8Uxz3IHJYH5QSwggIsqBzpuz5H//U1FU=
 github.com/mattn/go-runewidth v0.0.3/go.mod h1:LwmH8dsx7+W8Uxz3IHJYH5QSwggIsqBzpuz5H//U1FU=
 github.com/mattn/go-runewidth v0.0.4/go.mod h1:LwmH8dsx7+W8Uxz3IHJYH5QSwggIsqBzpuz5H//U1FU=
+github.com/mattn/go-runewidth v0.0.7 h1:Ei8KR0497xHyKJPAv59M1dkC+rOZCMBJ+t3fZ+twI54=
+github.com/mattn/go-runewidth v0.0.7/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
 github.com/mattn/go-tty v0.0.0-20180219170247-931426f7535a/go.mod h1:XPvLUNfbS4fJH25nqRHfWLMa1ONC8Amw+mIA639KxkE=
 github.com/matttproud/golang_protobuf_extensions v1.0.1 h1:4hp9jkHxhMHkqkrB3Ix0jegS5sx/RkqARlsWZ6pIwiU=
 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
@@ -815,6 +817,8 @@ github.com/oklog/ulid v1.3.1/go.mod h1:CirwcVhetQ6Lv90oh/F+FBtV6XMibvdAFo93nm5qn
 github.com/olekukonko/tablewriter v0.0.0-20170122224234-a0225b3f23b5/go.mod h1:vsDQFd/mU46D+Z4whnwzcISnGGzXWMclvtLoiIKAKIo=
 github.com/olekukonko/tablewriter v0.0.0-20180130162743-b8a9be070da4/go.mod h1:vsDQFd/mU46D+Z4whnwzcISnGGzXWMclvtLoiIKAKIo=
 github.com/olekukonko/tablewriter v0.0.1/go.mod h1:vsDQFd/mU46D+Z4whnwzcISnGGzXWMclvtLoiIKAKIo=
+github.com/olekukonko/tablewriter v0.0.4 h1:vHD/YYe1Wolo78koG299f7V/VAS08c6IpCLn+Ejf/w8=
+github.com/olekukonko/tablewriter v0.0.4/go.mod h1:zq6QwlOf5SlnkVbMSr5EoBv3636FWnp+qbPhuoO21uA=
 github.com/onsi/ginkgo v0.0.0-20170829012221-11459a886d9c/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
 github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
 github.com/onsi/ginkgo v1.7.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=