From 64a761fdde2e562f8f0618d24472c4a271676fdd Mon Sep 17 00:00:00 2001
From: TheWahlolly <justexobyte@gmail.com>
Date: Sat, 26 Apr 2025 12:38:05 +0300
Subject: [PATCH] v0.6.0 - Added shell parser, echo command and some other
 minor tweaks.

---
 halyde/apps/echo.lua      |  7 ++++
 halyde/config/shell.cfg   |  6 ++--
 halyde/core/boot.lua      |  4 ++-
 halyde/core/shell.lua     | 68 +++++++++++++++++++++++++++++++++++++--
 halyde/lib/filesystem.lua | 12 +++++--
 halyde/lib/keyboard.lua   |  0
 halyde/lib/termlib.lua    |  4 +--
 7 files changed, 90 insertions(+), 11 deletions(-)
 create mode 100644 halyde/apps/echo.lua
 delete mode 100644 halyde/lib/keyboard.lua

diff --git a/halyde/apps/echo.lua b/halyde/apps/echo.lua
new file mode 100644
index 0000000..97b1171
--- /dev/null
+++ b/halyde/apps/echo.lua
@@ -0,0 +1,7 @@
+local args = {...}
+local concatText = args[1]
+table.remove(args, 1)
+for _, item in pairs(args) do
+  concatText = concatText .. " " .. item
+end
+print(concatText)
diff --git a/halyde/config/shell.cfg b/halyde/config/shell.cfg
index c6c0594..e62ce6b 100644
--- a/halyde/config/shell.cfg
+++ b/halyde/config/shell.cfg
@@ -1,6 +1,8 @@
 local shellcfg = {
-  ["startupMessage"] = "\n │\n │ ".._OSVERSION..'\n │ Welcome! Type "help" to get started.\n │\n ', -- message shown on startup
-  ["prompt"] = "\x1b[92m%s > \x1b[0m" -- shell prompt, %s will be replaced with working directory. example: "%s > " turns to "/current/working/directory > "
+  ["startupMessage"] = "\n │\n │ ".._OSVERSION.." running on ".._VERSION..'\n │ Welcome! Type "help" to get started.\n │\n ', -- message shown on startup
+  ["prompt"] = "\x1b[92m%s > \x1b[0m", -- shell prompt, %s will be replaced with working directory. example: "%s > " turns to "/current/working/directory > "
+  ["path"] = { -- default locations where programs will be run from
+    "/halyde/apps/"}
 }
 
 return shellcfg
diff --git a/halyde/core/boot.lua b/halyde/core/boot.lua
index b89b14b..da01491 100644
--- a/halyde/core/boot.lua
+++ b/halyde/core/boot.lua
@@ -1,7 +1,7 @@
 local loadfile = ...
 local filesystem = loadfile("/halyde/lib/filesystem.lua")(loadfile)
 
-_G._OSVERSION = "Halyde 0.5.1"
+_G._OSVERSION = "Halyde 0.6.0"
 
 function _G.import(module, ...)
   local args = table.pack(...)
@@ -12,6 +12,8 @@ function _G.import(module, ...)
     end
   elseif filesystem.exists("/halyde/lib/"..module..".lua") then
     modulepath = "/halyde/lib/"..module..".lua"
+  elseif shell and shell.workingDirectory and filesystem.exists(shell.workingDirectory..module) then
+    modulepath = shell.workingDirectory..module
   end
   assert(modulepath, "module not found\npossible locations:\n/halyde/lib/"..module..".lua")
   local handle = filesystem.open(modulepath)
diff --git a/halyde/core/shell.lua b/halyde/core/shell.lua
index 9132b67..d2c6afa 100644
--- a/halyde/core/shell.lua
+++ b/halyde/core/shell.lua
@@ -1,10 +1,72 @@
 local shellcfg = import("/halyde/config/shell.cfg")
 import("termlib")
 local event = import("event")
+local ocelot = component.proxy(component.list("ocelot")())
+local filesystem = import("filesystem")
 
 _G.shell = {}
 _G.shell.workingDirectory = "/"
 
+local function parseCommand(command)
+  checkArg(1, command, "string")
+  local gm, result, args, trimmedCommand = command:gmatch('[^ ]+'), nil, {}, command
+  while true do
+    result = gm()
+    if not result then
+      break
+    end
+    if result:find('"') then
+      local location = trimmedCommand:find('"')
+      local argBefore = result:sub(1, result:find('"') - 1) -- edge case where there is no space before the quote, get the argument there
+      if argBefore and argBefore ~= "" then
+        table.insert(args, argBefore)
+      end
+      trimmedCommand = trimmedCommand:sub(location + 1)
+      if trimmedCommand:find('"') then
+        table.insert(args, trimmedCommand:sub(1, trimmedCommand:find('"') - 1))
+        trimmedCommand = trimmedCommand:sub(trimmedCommand:find('"') + 1)
+        gm = trimmedCommand:gmatch('[^ ]+')
+      else
+        print("\27[91mmalformed shell command")
+        return
+      end
+    else
+      table.insert(args, result)
+    end
+  end
+  -- execute the program
+  local foundfile = false
+  if filesystem.exists(args[1]) then
+    foundfile = true
+    local path = args[1]
+    table.remove(args, 1)
+    import(path, table.unpack(args))
+  else
+    for _, item in pairs(shellcfg["path"]) do
+      if filesystem.exists(item..args[1]) then
+        foundfile = true
+        local path = item..args[1]
+        table.remove(args, 1)
+        import(path, table.unpack(args))
+        break
+      else -- try to look for it without the file extension
+        local files = filesystem.list(item)
+        for _, file in pairs(files) do
+          if args[1] == file:match("(.+)%.[^%.]+$") then
+            foundfile = true
+            table.remove(args, 1)
+            import(item..file, table.unpack(args))
+            break
+          end
+        end
+      end
+    end
+  end
+  if not foundfile then
+    print("no such file or command: "..args[1])
+  end
+end
+
 print(shellcfg["startupMessage"])
 while true do
   coroutine.yield()
@@ -12,7 +74,7 @@ while true do
   print(shellcfg["prompt"]:format(shell.workingDirectory),false)
   -- termlib.cursorPosX = #(shell.workingDirectory .. " >  ")
   -- termlib.cursorPosY = termlib.cursorPosY - 1
-  read()
-  termlib.cursorPosX = 1
-  print("no shell parser yet")
+  local shellCommand = read()
+  ocelot.log("parsing "..shellCommand)
+  parseCommand(shellCommand)
 end
diff --git a/halyde/lib/filesystem.lua b/halyde/lib/filesystem.lua
index a477ced..6dfa5fc 100644
--- a/halyde/lib/filesystem.lua
+++ b/halyde/lib/filesystem.lua
@@ -11,7 +11,7 @@ local filesystem = {}
 
 function filesystem.processPath(path) -- returns the address and absolute path of a filesystem path as well as sanitizing it
   checkArg(1, path, "string")
-  absPath = path:gsub("/+", "/"):gsub("/$", "")
+  absPath = path:gsub("/+", "/")
   local address = nil
   if absPath:find("^/mnt/.../") then
      address = component.get(path:sub(6,8))
@@ -66,4 +66,12 @@ function filesystem.open(path, mode) -- opens a file and returns its handle
   return properHandle
 end
 
-return(filesystem)
\ No newline at end of file
+function filesystem.list(path)
+  checkArg(1, path, "string")
+  local address, absPath = filesystem.processPath(path)
+  if not address then
+    return false
+  end
+  return component.invoke(address, "list", absPath)
+end
+return(filesystem)
diff --git a/halyde/lib/keyboard.lua b/halyde/lib/keyboard.lua
deleted file mode 100644
index e69de29..0000000
diff --git a/halyde/lib/termlib.lua b/halyde/lib/termlib.lua
index f1e9b4d..9fe81ff 100644
--- a/halyde/lib/termlib.lua
+++ b/halyde/lib/termlib.lua
@@ -2,7 +2,6 @@ local event = import("event")
 --local keyboard = import("keyboard")
 
 local gpu = component.proxy(component.list("gpu")()) -- replace with component.gpu once implemented
-local ocelot = component.proxy(component.list("ocelot")())
 _G.termlib = {}
 termlib.cursorPosX = 1
 termlib.cursorPosY = 1
@@ -41,7 +40,6 @@ gpu.setForeground(defaultForegroundColor)
 gpu.setBackground(defaultBackgroundColor)
 
 local function scrollDown()
-  ocelot.log("scrolling")
   if gpu.copy(0,1,width,height,0,-1) then
     gpu.set(1,height,string.rep(" ",width))
     termlib.cursorPosY=height
@@ -183,7 +181,7 @@ function _G.read()
         end
       end
       termlib.cursorPosX, termlib.cursorPosY = cursorPosX, cursorPosY
-      if curtext == "" then print(" ", false) else print(curtext, false) end
+      print(curtext, false)
     else
       cursorWhite = not cursorWhite
     end