Fix editor launch with Windows cmd.exe when KUBE_EDITOR has spaces

Kubernetes-commit: df71672e5798960d0c6b4fa730aa7ac12991aef5

pkg/cmd/util/editor/editor.go

@@ -17,17 +17,10 @@ limitations under the License.
 package editor
 
 import (
-	"fmt"
 	"io"
 	"os"
-	"os/exec"
-	"path/filepath"
 	"runtime"
 	"strings"
-
-	"k8s.io/klog/v2"
-
-	"k8s.io/kubectl/pkg/util/term"
 )
 
 const (
@@ -96,45 +89,6 @@ func defaultEnvEditor(envs []string) ([]string, bool) {
 	return append(shell, editor), true
 }
 
-func (e Editor) args(path string) []string {
-	args := make([]string, len(e.Args))
-	copy(args, e.Args)
-	if e.Shell {
-		last := args[len(args)-1]
-		args[len(args)-1] = fmt.Sprintf("%s %q", last, path)
-	} else {
-		args = append(args, path)
-	}
-	return args
-}
-
-// Launch opens the described or returns an error. The TTY will be protected, and
-// SIGQUIT, SIGTERM, and SIGINT will all be trapped.
-func (e Editor) Launch(path string) error {
-	if len(e.Args) == 0 {
-		return fmt.Errorf("no editor defined, can't open %s", path)
-	}
-	abs, err := filepath.Abs(path)
-	if err != nil {
-		return err
-	}
-	args := e.args(abs)
-	cmd := exec.Command(args[0], args[1:]...)
-	cmd.Stdout = os.Stdout
-	cmd.Stderr = os.Stderr
-	cmd.Stdin = os.Stdin
-	klog.V(5).Infof("Opening file with editor %v", args)
-	if err := (term.TTY{In: os.Stdin, TryDev: true}).Safe(cmd.Run); err != nil {
-		if err, ok := err.(*exec.Error); ok {
-			if err.Err == exec.ErrNotFound {
-				return fmt.Errorf("unable to launch the editor %q", strings.Join(e.Args, " "))
-			}
-		}
-		return fmt.Errorf("there was a problem with the editor %q", strings.Join(e.Args, " "))
-	}
-	return nil
-}
-
 // LaunchTempFile reads the provided stream into a temporary file in the given directory
 // and file prefix, and then invokes Launch with the path of that file. It will return
 // the contents of the file after launch, any errors that occur, and the path of the

pkg/cmd/util/editor/launcher_others.go

@@ -0,0 +1,70 @@
+//go:build !windows
+// +build !windows
+
+/*
+Copyright 2022 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 editor
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+
+	"k8s.io/klog/v2"
+
+	"k8s.io/kubectl/pkg/util/term"
+)
+
+func (e Editor) args(path string) []string {
+	args := make([]string, len(e.Args))
+	copy(args, e.Args)
+	if e.Shell {
+		last := args[len(args)-1]
+		args[len(args)-1] = fmt.Sprintf("%s %q", last, path)
+	} else {
+		args = append(args, path)
+	}
+	return args
+}
+
+// Launch opens the described or returns an error. The TTY will be protected, and
+// SIGQUIT, SIGTERM, and SIGINT will all be trapped.
+func (e Editor) Launch(path string) error {
+	if len(e.Args) == 0 {
+		return fmt.Errorf("no editor defined, can't open %s", path)
+	}
+	abs, err := filepath.Abs(path)
+	if err != nil {
+		return err
+	}
+	args := e.args(abs)
+	cmd := exec.Command(args[0], args[1:]...)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	cmd.Stdin = os.Stdin
+	klog.V(5).Infof("Opening file with editor %v", args)
+	if err := (term.TTY{In: os.Stdin, TryDev: true}).Safe(cmd.Run); err != nil {
+		if errors.Is(err, exec.ErrNotFound) {
+			return fmt.Errorf("unable to launch the editor %q", strings.Join(e.Args, " "))
+		}
+		return fmt.Errorf("there was a problem with the editor %q", strings.Join(e.Args, " "))
+	}
+	return nil
+}

pkg/cmd/util/editor/launcher_windows.go

@@ -0,0 +1,93 @@
+/*
+Copyright 2022 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 editor
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"syscall"
+
+	"k8s.io/klog/v2"
+
+	"k8s.io/kubectl/pkg/util/term"
+)
+
+// Enclose argument in double-quotes. Double each double-quote character as
+// an escape sequence.
+func cmdQuoteArg(arg string) string {
+	var result strings.Builder
+	result.WriteString(`"`)
+	result.WriteString(strings.ReplaceAll(arg, `"`, `""`))
+	result.WriteString(`"`)
+	return result.String()
+}
+
+func (e Editor) args(path string) []string {
+	args := make([]string, len(e.Args))
+	copy(args, e.Args)
+	if e.Shell {
+		last := args[len(args)-1]
+		if args[0] == windowsShell {
+			// Use double-quotation around whole command line string
+			// See https://stackoverflow.com/a/6378038
+			args[len(args)-1] = fmt.Sprintf(`"%s %s"`, last, cmdQuoteArg(path))
+		} else {
+			args[len(args)-1] = fmt.Sprintf("%s %q", last, path)
+		}
+	} else {
+		args = append(args, path)
+	}
+	return args
+}
+
+// Launch opens the described or returns an error. The TTY will be protected, and
+// SIGQUIT, SIGTERM, and SIGINT will all be trapped.
+func (e Editor) Launch(path string) error {
+	if len(e.Args) == 0 {
+		return fmt.Errorf("no editor defined, can't open %s", path)
+	}
+	abs, err := filepath.Abs(path)
+	if err != nil {
+		return err
+	}
+	args := e.args(abs)
+	var cmd *exec.Cmd
+	if e.Shell && args[0] == windowsShell {
+		// Pass all arguments to cmd.exe as one string
+		// See https://pkg.go.dev/os/exec#Command
+		cmd = exec.Command(args[0])
+		cmd.SysProcAttr = &syscall.SysProcAttr{}
+		cmd.SysProcAttr.CmdLine = strings.Join(args, " ")
+	} else {
+		cmd = exec.Command(args[0], args[1:]...)
+	}
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	cmd.Stdin = os.Stdin
+	klog.V(5).Infof("Opening file with editor %v", args)
+	if err := (term.TTY{In: os.Stdin, TryDev: true}).Safe(cmd.Run); err != nil {
+		if errors.Is(err, exec.ErrNotFound) {
+			return fmt.Errorf("unable to launch the editor %q", strings.Join(e.Args, " "))
+		}
+		return fmt.Errorf("there was a problem with the editor %q", strings.Join(e.Args, " "))
+	}
+	return nil
+}