94 lines
2.6 KiB
Go
94 lines
2.6 KiB
Go
/*
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Copyright 2022 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package editor
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import (
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"errors"
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"fmt"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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"syscall"
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"k8s.io/klog/v2"
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"k8s.io/kubectl/pkg/util/term"
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)
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// Enclose argument in double-quotes. Double each double-quote character as
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// an escape sequence.
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func cmdQuoteArg(arg string) string {
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var result strings.Builder
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result.WriteString(`"`)
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result.WriteString(strings.ReplaceAll(arg, `"`, `""`))
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result.WriteString(`"`)
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return result.String()
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}
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func (e Editor) args(path string) []string {
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args := make([]string, len(e.Args))
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copy(args, e.Args)
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if e.Shell {
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last := args[len(args)-1]
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if args[0] == windowsShell {
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// Use double-quotation around whole command line string
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// See https://stackoverflow.com/a/6378038
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args[len(args)-1] = fmt.Sprintf(`"%s %s"`, last, cmdQuoteArg(path))
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} else {
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args[len(args)-1] = fmt.Sprintf("%s %q", last, path)
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}
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} else {
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args = append(args, path)
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}
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return args
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}
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// Launch opens the described or returns an error. The TTY will be protected, and
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// SIGQUIT, SIGTERM, and SIGINT will all be trapped.
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func (e Editor) Launch(path string) error {
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if len(e.Args) == 0 {
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return fmt.Errorf("no editor defined, can't open %s", path)
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}
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abs, err := filepath.Abs(path)
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if err != nil {
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return err
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}
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args := e.args(abs)
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var cmd *exec.Cmd
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if e.Shell && args[0] == windowsShell {
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// Pass all arguments to cmd.exe as one string
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// See https://pkg.go.dev/os/exec#Command
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cmd = exec.Command(args[0])
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cmd.SysProcAttr = &syscall.SysProcAttr{}
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cmd.SysProcAttr.CmdLine = strings.Join(args, " ")
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} else {
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cmd = exec.Command(args[0], args[1:]...)
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}
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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cmd.Stdin = os.Stdin
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klog.V(5).Infof("Opening file with editor %v", args)
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if err := (term.TTY{In: os.Stdin, TryDev: true}).Safe(cmd.Run); err != nil {
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if errors.Is(err, exec.ErrNotFound) {
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return fmt.Errorf("unable to launch the editor %q", strings.Join(e.Args, " "))
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}
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return fmt.Errorf("there was a problem with the editor %q", strings.Join(e.Args, " "))
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}
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return nil
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}
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