Fix and improve the tab complete in sh

use path as given by user in sh shell in tab completion, and do not show resolved path

don't add space to single directory completion in case user wants to add more directories

escape magic chars in possible hint handler from user input on command line

src/main/resources/assets/opencomputers/loot/OpenOS/bin/sh.lua

@@ -384,6 +384,10 @@ end
 local args, options = shell.parse(...)
 local history = {}
 
+local function escapeMagic(text)
+  return text:gsub('[%(%)%.%%%+%-%*%?%[%^%$]', '%%%1')
+end
+
 local function getMatchingPrograms(baseName)
   local result = {}
   -- TODO only matching files with .lua extension for now, might want to
@@ -391,7 +395,7 @@ local function getMatchingPrograms(baseName)
   if not baseName or #baseName == 0 then
     baseName = "^(.*)%.lua$"
   else
-    baseName = "^(" .. baseName .. ".*)%.lua$"
+    baseName = "^(" .. escapeMagic(baseName) .. ".*)%.lua$"
   end
   for basePath in string.gmatch(os.getenv("PATH"), "[^:]+") do
     for file in fs.list(basePath) do
@@ -404,7 +408,8 @@ local function getMatchingPrograms(baseName)
   return result
 end
 
-local function getMatchingFiles(baseName)
+local function getMatchingFiles(partialPrefix, name)
+  local baseName = shell.resolve(partialPrefix .. name)
   local result, basePath = {}
   -- note: we strip the trailing / to make it easier to navigate through
   -- directories using tab completion (since entering the / will then serve
@@ -416,12 +421,12 @@ local function getMatchingFiles(baseName)
     baseName = "^(.-)/?$"
   else
     basePath = fs.path(baseName) or "/"
-    baseName = "^(" .. fs.name(baseName) .. ".-)/?$"
+    baseName = "^(" .. escapeMagic(fs.name(baseName)) .. ".-)/?$"
   end
   for file in fs.list(basePath) do
     local match = file:match(baseName)
     if match then
-      table.insert(result, fs.concat(basePath, match))
+      table.insert(result, partialPrefix ..  match)
     end
   end
   -- (cont.) but if there's only one match and it's a directory, *then* we
@@ -444,10 +449,20 @@ local function hintHandler(line, cursor)
     -- first part and no path, look for programs in the $PATH
     result = getMatchingPrograms(line)
   else -- just look normal files
-    result = getMatchingFiles(shell.resolve(partial or line))
+    local partialPrefix = (partial or line)
+    local name = fs.name(partialPrefix)
+    partialPrefix = partialPrefix:sub(1, -name:len() - 1)
+    result = getMatchingFiles(partialPrefix, name)
   end
+  local resultSuffix = ""
+  if searchInPath then
+    resultSuffix  = " "
+  elseif #result == 1 and result[1]:sub(-1) ~= '/' then
+    resultSuffix = " "
+  end
+  prefix = prefix or ""
   for i = 1, #result do
-    result[i] = (prefix or "") .. result[i] .. (searchInPath and " " or "")
+    result[i] = prefix .. result[i] .. resultSuffix
   end
   table.sort(result)
   return result