Expose emulator functions and support output

Ref #979

cmd/micro/micro.go

@@ -390,6 +390,12 @@ func main() {
 	L.SetGlobal("IsWordChar", luar.New(L, IsWordChar))
 	L.SetGlobal("HandleCommand", luar.New(L, HandleCommand))
 	L.SetGlobal("HandleShellCommand", luar.New(L, HandleShellCommand))
+	L.SetGlobal("ExecCommand", luar.New(L, ExecCommand))
+	L.SetGlobal("RunShellCommand", luar.New(L, RunShellCommand))
+	L.SetGlobal("RunBackgroundShell", luar.New(L, RunBackgroundShell))
+	L.SetGlobal("RunInteractiveShell", luar.New(L, RunInteractiveShell))
+	L.SetGlobal("TermEmuSupported", luar.New(L, TermEmuSupported))
+	L.SetGlobal("RunTermEmulator", luar.New(L, RunTermEmulator))
 	L.SetGlobal("GetLeadingWhitespace", luar.New(L, GetLeadingWhitespace))
 	L.SetGlobal("MakeCompletion", luar.New(L, MakeCompletion))
 	L.SetGlobal("NewBuffer", luar.New(L, NewBufferFromString))

cmd/micro/shell_posix.go

@@ -8,11 +8,11 @@ import (
 
 const TermEmuSupported = true
 
-func RunTermEmulator(input string, wait bool, getOutput bool) error {
+func RunTermEmulator(input string, wait bool, getOutput bool, callback string) error {
 	args, err := shellwords.Split(input)
 	if err != nil {
 		return err
 	}
-	err = CurView().StartTerminal(args, wait, false, "")
+	err = CurView().StartTerminal(args, wait, getOutput, callback)
 	return err
 }

cmd/micro/shell_windows.go

@@ -2,8 +2,10 @@
 
 package main
 
+import "errors"
+
 const TermEmuSupported = false
 
-func RunTermEmulator(input string, wait bool, getOutput bool) string {
-	return "Unsupported"
+func RunTermEmulator(input string, wait bool, getOutput bool) error {
+	return errors.New("Unsupported operating system")
 }

cmd/micro/terminal.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"bytes"
 	"fmt"
 	"os"
 	"os/exec"
@@ -29,6 +30,7 @@ type Terminal struct {
 	selection [2]Loc
 	wait      bool
 	getOutput bool
+	output    *bytes.Buffer
 	callback  string
 }
 
@@ -59,18 +61,23 @@ func (t *Terminal) GetSelection(width int) string {
 }
 
 // Start begins a new command in this terminal with a given view
-func (t *Terminal) Start(execCmd []string, view *View) error {
+func (t *Terminal) Start(execCmd []string, view *View, getOutput bool) error {
 	if len(execCmd) <= 0 {
 		return nil
 	}
 
 	cmd := exec.Command(execCmd[0], execCmd[1:]...)
-	term, _, err := terminal.Start(&t.state, cmd)
+	t.output = nil
+	if getOutput {
+		t.output = bytes.NewBuffer([]byte{})
+	}
+	term, _, err := terminal.Start(&t.state, cmd, t.output)
 	if err != nil {
 		return err
 	}
 	t.term = term
 	t.view = view
+	t.getOutput = getOutput
 	t.vtOld = view.Type
 	t.status = VTRunning
 	t.title = execCmd[0] + ":" + strconv.Itoa(cmd.Process.Pid)
@@ -153,7 +160,7 @@ func (t *Terminal) Stop() {
 	if t.wait {
 		t.status = VTDone
 	} else {
-		t.status = VTIdle
+		t.Close()
 		t.view.Type = t.vtOld
 	}
 }
@@ -163,9 +170,11 @@ func (t *Terminal) Stop() {
 func (t *Terminal) Close() {
 	t.status = VTIdle
 	// call the lua function that the user has given as a callback
-	_, err := Call(t.callback)
-	if err != nil && !strings.HasPrefix(err.Error(), "function does not exist") {
-		TermMessage(err)
+	if t.getOutput {
+		_, err := Call(t.callback, t.output.String())
+		if err != nil && !strings.HasPrefix(err.Error(), "function does not exist") {
+			TermMessage(err)
+		}
 	}
 }
 

cmd/micro/view.go

@@ -166,9 +166,8 @@ func (v *View) ToggleStatusLine() {
 
 // StartTerminal execs a command in this view
 func (v *View) StartTerminal(execCmd []string, wait bool, getOutput bool, luaCallback string) error {
-	err := v.term.Start(execCmd, v)
+	err := v.term.Start(execCmd, v, getOutput)
 	v.term.wait = wait
-	v.term.getOutput = getOutput
 	v.term.callback = luaCallback
 	if err == nil {
 		v.term.Resize(v.Width, v.Height)