Method runShell

app.go:570–694

runShell is used to run a shell command. Modes are as follows: Prefix Wait Async Stdin Stdout Stderr UI action $ No No Yes Yes Yes Pause and then resume % No No Yes Yes Yes Statline for input/output ! Yes No Yes Yes Yes

(s string, args []string, prefix string)

//	!       Yes   No     Yes    Yes     Yes     Pause and then resume
//	&       No    Yes    No     No      No      Do nothing
func (app *app) runShell(s string, args []string, prefix string) {
	app.nav.exportFiles()
	app.ui.exportSizes()
	app.exportMode()
	exportLfPath()
	exportOpts()

	gState.mutex.Lock()
	gState.data["maps"] = listBinds(map[string]map[string]expr{
		"n": gOpts.nkeys,
		"v": gOpts.vkeys,
	})
	gState.data["nmaps"] = listBinds(map[string]map[string]expr{
		"n": gOpts.nkeys,
	})
	gState.data["vmaps"] = listBinds(map[string]map[string]expr{
		"v": gOpts.vkeys,
	})
	gState.data["cmaps"] = listBinds(map[string]map[string]expr{
		"c": gOpts.cmdkeys,
	})
	gState.data["cmds"] = listCmds(gOpts.cmds)
	gState.data["jumps"] = listJumps(app.nav.jumpList, app.nav.jumpListInd)
	gState.data["history"] = listHistory(app.cmdHistory)
	gState.data["files"] = listFilesInCurrDir(app.nav)
	gState.mutex.Unlock()

	cmd := shellCommand(s, args)

	switch prefix {
	case "$", "!":
		cmd.Stdin = os.Stdin
		cmd.Stdout = os.Stderr
		cmd.Stderr = os.Stderr

		app.runCmdSync(cmd, prefix == "!")
		return
	}

	// We are running the command asynchronously
	var inReader, inWriter, outReader, outWriter *os.File
	if prefix == "%" {
		if app.ui.cmdPrefix == ">" {
			return
		}

		// [exec.Cmd.StdoutPipe] cannot be used as it requires the output to be fully
		// read before calling [exec.Cmd.Wait], however in this case Cmd.Wait should
		// only wait for the command to finish executing regardless of whether the
		// output has been fully read or not.
		var err error
		inReader, inWriter, err = os.Pipe()
		if err != nil {
			log.Printf("creating input pipe: %s", err)
			return
		}
		cmd.Stdin = inReader
		app.cmdIn = inWriter