remove github.com/buger/goterm dependency

this is just a few bytes of escape codes, there is no need to depend on
a library for it. While it is not a big one it still seems better to
just write it ourselves.

Signed-off-by: Paul Holzinger <[email protected]>

Author: Luap99

cmd/podman/common/term.go

@@ -0,0 +1,19 @@
+package common
+
+import (
+	"os"
+
+	"golang.org/x/term"
+)
+
+// ClearScreen clears the screen and puts the cursor back to position 1,1
+// Useful when printing output in an interval like podman stats.
+// When the stdout is not a terminal this is a NOP.
+func ClearScreen() {
+	// Only write escape sequences when the output is a terminal.
+	if term.IsTerminal(int(os.Stdout.Fd())) {
+		// terminal escape control sequence to clear screen ([2J)
+		// followed by putting the cursor to position 1,1 ([1;1H)
+		os.Stdout.WriteString("\033[2J\033[1;1H")
+	}
+}

cmd/podman/containers/ps.go

@@ -10,7 +10,6 @@ import (
 	"strings"
 	"time"
 
-	tm "github.com/buger/goterm"
 	"github.com/containers/common/libnetwork/types"
 	"github.com/containers/common/pkg/completion"
 	"github.com/containers/common/pkg/report"
@@ -267,9 +266,7 @@ func ps(cmd *cobra.Command, _ []string) error {
 				responses = append(responses, psReporter{r})
 			}
 
-			tm.Clear()
-			tm.MoveCursor(1, 1)
-			tm.Flush()
+			common.ClearScreen()
 
 			if err := headers(); err != nil {
 				return err

cmd/podman/containers/stats.go

@@ -6,7 +6,6 @@ import (
 	"os"
 	"strconv"
 
-	tm "github.com/buger/goterm"
 	"github.com/containers/common/pkg/completion"
 	"github.com/containers/common/pkg/report"
 	"github.com/containers/podman/v5/cmd/podman/common"
@@ -152,9 +151,7 @@ func outputStats(cmd *cobra.Command, reports []define.ContainerStats) error {
 		"PIDS":          "PIDS",
 	})
 	if !statsOptions.NoReset {
-		tm.Clear()
-		tm.MoveCursor(1, 1)
-		tm.Flush()
+		common.ClearScreen()
 	}
 	stats := make([]containerStats, 0, len(reports))
 	for _, r := range reports {

cmd/podman/pods/stats.go

@@ -6,7 +6,6 @@ import (
 	"os"
 	"time"
 
-	"github.com/buger/goterm"
 	"github.com/containers/common/pkg/report"
 	"github.com/containers/podman/v5/cmd/podman/common"
 	"github.com/containers/podman/v5/cmd/podman/registry"
@@ -93,9 +92,7 @@ func stats(cmd *cobra.Command, args []string) error {
 			err = printJSONPodStats(reports)
 		} else {
 			if !statsOptions.NoReset {
-				goterm.Clear()
-				goterm.MoveCursor(1, 1)
-				goterm.Flush()
+				common.ClearScreen()
 			}
 			if report.OriginUser == rpt.Origin {
 				err = userTemplate(rpt, reports)

go.mod

@@ -9,7 +9,6 @@ require (
 	github.com/BurntSushi/toml v1.5.0
 	github.com/Microsoft/go-winio v0.6.2
 	github.com/blang/semver/v4 v4.0.0
-	github.com/buger/goterm v1.0.4
 	github.com/checkpoint-restore/checkpointctl v1.3.0
 	github.com/checkpoint-restore/go-criu/v7 v7.2.0
 	github.com/containernetworking/plugins v1.6.2

go.sum

@@ -28,8 +28,6 @@ github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/blang/semver/v4 v4.0.0 h1:1PFHFE6yCCTv8C1TeyNNarDzntLi7wMI5i/pzqYIsAM=
 github.com/blang/semver/v4 v4.0.0/go.mod h1:IbckMUScFkM3pff0VJDNKRiT6TG/YpiHIM2yvyW5YoQ=
-github.com/buger/goterm v1.0.4 h1:Z9YvGmOih81P0FbVtEYTFF6YsSgxSUKEhf/f9bTMXbY=
-github.com/buger/goterm v1.0.4/go.mod h1:HiFWV3xnkolgrBV3mY8m0X0Pumt4zg4QhbdOzQtB8tE=
 github.com/cenkalti/backoff/v4 v4.3.0 h1:MyRJ/UdXutAwSAT+s3wNd7MfTIcy71VQueUuFK343L8=
 github.com/cenkalti/backoff/v4 v4.3.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
@@ -605,7 +603,6 @@ golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201204225414-ed752295db88/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210331175145-43e1dd70ce54/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210616094352-59db8d763f22/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=