mirror of https://github.com/Llewellynvdm/fzf.git
94 lines
2.2 KiB
Go
94 lines
2.2 KiB
Go
//go:build !windows
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package util
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import (
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"fmt"
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"os"
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"os/exec"
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"strings"
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"syscall"
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"golang.org/x/sys/unix"
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)
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type Executor struct {
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shell string
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args []string
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escaper *strings.Replacer
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}
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func NewExecutor(withShell string) *Executor {
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shell := os.Getenv("SHELL")
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args := strings.Fields(withShell)
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if len(args) > 0 {
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shell = args[0]
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args = args[1:]
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} else {
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if len(shell) == 0 {
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shell = "sh"
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}
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args = []string{"-c"}
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}
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var escaper *strings.Replacer
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tokens := strings.Split(shell, "/")
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if tokens[len(tokens)-1] == "fish" {
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// https://fishshell.com/docs/current/language.html#quotes
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// > The only meaningful escape sequences in single quotes are \', which
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// > escapes a single quote and \\, which escapes the backslash symbol.
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escaper = strings.NewReplacer("\\", "\\\\", "'", "\\'")
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} else {
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escaper = strings.NewReplacer("'", "'\\''")
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}
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return &Executor{shell, args, escaper}
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}
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// ExecCommand executes the given command with $SHELL
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func (x *Executor) ExecCommand(command string, setpgid bool) *exec.Cmd {
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cmd := exec.Command(x.shell, append(x.args, command)...)
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if setpgid {
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cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
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}
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return cmd
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}
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func (x *Executor) QuoteEntry(entry string) string {
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return "'" + x.escaper.Replace(entry) + "'"
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}
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func (x *Executor) Become(stdin *os.File, environ []string, command string) {
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shellPath, err := exec.LookPath(x.shell)
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if err != nil {
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fmt.Fprintf(os.Stderr, "fzf (become): %s\n", err.Error())
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os.Exit(127)
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}
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args := append([]string{shellPath}, append(x.args, command)...)
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SetStdin(stdin)
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syscall.Exec(shellPath, args, environ)
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}
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// KillCommand kills the process for the given command
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func KillCommand(cmd *exec.Cmd) error {
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return syscall.Kill(-cmd.Process.Pid, syscall.SIGKILL)
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}
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// IsWindows returns true on Windows
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func IsWindows() bool {
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return false
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}
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// SetNonblock executes syscall.SetNonblock on file descriptor
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func SetNonblock(file *os.File, nonblock bool) {
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syscall.SetNonblock(int(file.Fd()), nonblock)
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}
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// Read executes syscall.Read on file descriptor
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func Read(fd int, b []byte) (int, error) {
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return syscall.Read(int(fd), b)
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}
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func SetStdin(file *os.File) {
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unix.Dup2(int(file.Fd()), 0)
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}
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