Drop shell functionality but keep live shell

Author: mgnsk

README.md

@@ -6,7 +6,7 @@
 
 ## Introduction
 
-balafon is a multitrack MIDI sequencer language and interpreter. It consists of a shell with live mode, player and a linter.
+balafon is a multitrack MIDI sequencer language and interpreter. It consists of a live shell, player and a linter.
 
 ## Install
 
@@ -46,27 +46,7 @@ cat examples/bach | balafon play --port "VMPK" -
 balafon play --port 2 examples/bonham
 ```
 
-- Enter a shell on the default port:
-
-```sh
-balafon shell
-```
-
-A shell is a text shell for the balafon language. It is capable of multiline input when entering bars.
-
-- Enter a shell on a specific port:
-
-```sh
-balafon shell --port "Hydrogen"
-```
-
-- Load a file and enter a shell:
-
-```sh
-balafon load --port "Hydrogen" examples/bonham
-```
-
-- Enter live mode by entering the `live` command:
+- Enter live mode:
 
 ```sh
 balafon live --port "Hydrogen" examples/live_drumset
@@ -96,9 +76,7 @@ Available Commands:
   help        Help about any command
   lint        Lint a file
   live        Load a file and continue in a live shell
-  load        Load a file and continue in a balafon shell
   play        Play a file
-  shell       Run a balafon shell
 
 Flags:
   -h, --help   help for this command

cmd/balafon/main.go

@@ -8,7 +8,6 @@ import (
 	"os"
 	"strconv"
 
-	"github.com/c-bata/go-prompt"
 	"github.com/mgnsk/balafon/interpreter"
 	"github.com/mgnsk/balafon/lint"
 	"github.com/mgnsk/balafon/player"
@@ -50,8 +49,6 @@ func main() {
 		},
 	}
 
-	root.AddCommand(createCmdShell())
-	root.AddCommand(createCmdLoad())
 	root.AddCommand(createCmdLive())
 	root.AddCommand(createCmdPlay())
 	root.AddCommand(createCmdLint())
@@ -61,66 +58,6 @@ func main() {
 	}
 }
 
-func createCmdShell() *cobra.Command {
-	cmd := &cobra.Command{
-		Use:           "shell",
-		Short:         "Run a balafon shell",
-		SilenceErrors: true,
-		SilenceUsage:  true,
-		RunE: func(c *cobra.Command, _ []string) error {
-			out, err := openOut(c.Flag("port").Value.String())
-			if err != nil {
-				return err
-			}
-
-			it := interpreter.New()
-			seq := sequencer.New()
-			runPrompt(out, it, seq)
-
-			return nil
-		},
-	}
-	addPortFlag(cmd)
-	return cmd
-}
-
-func createCmdLoad() *cobra.Command {
-	cmd := &cobra.Command{
-		Use:   "load [file]",
-		Short: "Load a file and continue in a balafon shell",
-		Args:  cobra.ExactArgs(1),
-		RunE: func(c *cobra.Command, args []string) error {
-			file, err := ioutil.ReadFile(args[0])
-			if err != nil {
-				return err
-			}
-
-			out, err := openOut(c.Flag("port").Value.String())
-			if err != nil {
-				return err
-			}
-
-			it := interpreter.New()
-			seq := sequencer.New()
-
-			if err := it.Eval(file); err != nil {
-				return err
-			}
-
-			fmt.Println(string(file))
-
-			seq.AddBars(it.Flush()...)
-			seq.Flush()
-
-			runPrompt(out, it, seq)
-
-			return nil
-		},
-	}
-	addPortFlag(cmd)
-	return cmd
-}
-
 func createCmdLive() *cobra.Command {
 	cmd := &cobra.Command{
 		Use:   "live [file]",
@@ -226,40 +163,6 @@ func createCmdLint() *cobra.Command {
 	return cmd
 }
 
-func runPrompt(out drivers.Out, it *interpreter.Interpreter, seq *sequencer.Sequencer) {
-	p := player.New(out)
-
-	pt := shell.NewBufferedPrompt(
-		prompt.NewStandardInputParser(),
-		prompt.NewStdoutWriter(),
-		func(in string) {
-			if err := it.EvalString(in); err != nil {
-				// Keep old input
-				fmt.Println(err)
-				return
-			}
-
-			seq.AddBars(it.Flush()...)
-
-			events := seq.Flush()
-
-			if err := p.Play(events...); err != nil {
-				fmt.Println(err)
-			}
-
-			return
-		},
-		func(in prompt.Document) []prompt.Suggest {
-			// TODO: fix tab key overwrites existing text
-			return it.Suggest(in)
-		},
-		nil,
-	)
-
-	defer shell.RestoreTerminal()
-	pt.Run()
-}
-
 func openInputFile(name string) (io.ReadCloser, error) {
 	if name == "-" {
 		return os.Stdin, nil