Work on code to run shells from a kitten with shell integration

tools/cmd/run_shell/main.go

@@ -0,0 +1,54 @@
+// License: GPLv3 Copyright: 2023, Kovid Goyal, <kovid at kovidgoyal.net>
+
+package run_shell
+
+import (
+	"fmt"
+
+	"kitty/tools/cli"
+	"kitty/tools/tui"
+)
+
+var _ = fmt.Print
+
+type Options struct {
+	Shell            string
+	ShellIntegration string
+}
+
+func main(args []string, opts *Options) (rc int, err error) {
+	if len(args) > 0 {
+		tui.RunCommandRestoringTerminalToSaneStateAfter(args)
+	}
+	err = tui.RunShell(tui.ResolveShell(opts.Shell), tui.ResolveShellIntegration(opts.ShellIntegration))
+	if err != nil {
+		rc = 1
+	}
+	return
+}
+
+func EntryPoint(root *cli.Command) *cli.Command {
+	sc := root.AddSubCommand(&cli.Command{
+		Name:             "run-shell",
+		Usage:            "[options] [optional cmd to run before running the shell ...]",
+		ShortDescription: "Run the user's shell with shell integration enabled",
+		HelpText:         "Run the users's configured shell. If the shell supports shell integration, enable it based on the user's configured shell_integration setting.",
+		Run: func(cmd *cli.Command, args []string) (ret int, err error) {
+			opts := &Options{}
+			err = cmd.GetOptionValues(opts)
+			if err != nil {
+				return 1, err
+			}
+			return main(args, opts)
+		},
+	})
+	sc.Add(cli.OptionSpec{
+		Name: "--shell-integration",
+		Help: "Specify a value for the shell_integration option, overriding the one from kitty.conf.",
+	})
+	sc.Add(cli.OptionSpec{
+		Name: "--shell",
+		Help: "Specify the shell command to run. If not specified the value of the shell option from kitty.conf is used.",
+	})
+	return sc
+}