MBS as default shell

1 files changed, 81 insertions, 0 deletions

diff --git a/.mbs/modules/shell.lua b/.mbs/modules/shell.lua
new file mode 100644
index 0000000..035322d
--- /dev/null
+++ b/.mbs/modules/shell.lua
@@ -0,0 +1,81 @@
+local function lib_load(path, name)
+  if not _G[name] then
+    os.loadAPI(fs.combine(path, "lib/" .. name .. ".lua"))
+    if not _G[name] then _G[name] = _G[name .. ".lua"] end
+  end
+end
+
+return {
+  description = "Replaces the shell with an advanced version.",
+
+  dependencies = {
+    "bin/clear.lua",
+    "bin/shell.lua",
+    "lib/blit_window.lua",
+    "lib/scroll_window.lua",
+    "lib/stack_trace.lua",
+  },
+
+  -- When updating the defaults, one should also update bin/shell.lua
+  settings = {
+    {
+      name = "mbs.shell.enabled",
+      description = "Whether the extended shell is enabled.",
+      default = true,
+    },
+    {
+      name = "mbs.shell.history_file",
+      description = "The file to save history to. Set to false to disable.",
+      default = ".shell_history",
+    },
+    {
+      name = "mbs.shell.history_max",
+      description = "The maximum size of the history file",
+      default = 1e4,
+    },
+    {
+      name = "mbs.shell.scroll_max",
+      description = "The maximum size of the scrollback",
+      default = 1e3,
+    },
+    {
+      name = "mbs.shell.traceback",
+      description = "Show an error traceback when a program errors",
+      default = true,
+    },
+    {
+      name = "mbs.shell.require_path",
+      description = "The path from that require will use by default. Set to false to use the CraftOS default.",
+      default = false,
+    },
+    {
+      name = "mbs.shell.strict_globals",
+      description = "When set to true the shell will throw errors when programs attempt to define new globals in their environment. If you really want globals then you should use _G instead.",
+      default = false,
+    },
+  },
+
+  enabled = function() return settings.get("mbs.shell.enabled") end,
+
+  setup = function(path)
+    lib_load(path, "scroll_window")
+    lib_load(path, "blit_window")
+    lib_load(path, "stack_trace")
+
+    shell.setAlias("shell", "/" .. fs.combine(path, "bin/shell.lua"))
+    shell.setAlias("clear", "/" .. fs.combine(path, "bin/clear.lua"))
+
+    shell.setCompletionFunction(fs.combine(path, "bin/shell.lua"), function(shell, index, text, previous)
+      if index == 1 then return shell.completeProgram(text) end
+    end)
+  end,
+
+  startup = function(path)
+    local fn, err = loadfile(fs.combine(path, "bin/shell.lua"), _ENV)
+    if not fn then error(err) end
+
+    fn()
+
+    shell.exit()
+  end,
+}
\ No newline at end of file