rewrote the whole index thing and made it possible to remove packages from the pkgfs index

lib/pkgfs.lua

@@ -3,6 +3,7 @@ local w, lz16 = pcall(require, "liblz16")
 if not w then lz16 = nil end
 
 pkgfs = {}
+pkgfs.files = {}
 local findex = {}
 local handles = {}
 local hc = 0
@@ -98,18 +99,36 @@ function pkgfs.component.close(handle)
  return true
 end
 
-function pkgfs.add(fname,comp) -- string boolean -- -- Add a package as specified in *fname* to the pkgfs component. If *comp* is true, read it as a LZ16-compressed package.
+local function index()
+ findex = {}
+ for k,v in pairs(pkgfs.files) do
+  fname, comp = v[1], v[2]
   if fname:sub(1,1) ~= "/" then
    fname = "/"..fnormalize(os.getenv("PWD").."/"..fname)
   end
   local f = fopen(fname,comp)
- if not fname then error("unable to open file") end
+  if not f then error("unable to open file") end
   print(fname)
   for name, read, fsize in mtar.iter(f) do
    findex[fnormalize(name)] = {fname,comp}
   end
   f:close()
  end
+ return true
+end
+
+function pkgfs.add(fname,comp) -- string boolean -- boolean -- Add a package as specified in *fname* to the pkgfs component. If *comp* is true, read it as a LZ16-compressed package.
+ pkgfs.files[#pkgfs.files+1] = {fname,comp}
+ return index()
+end
+function pkgfs.remove(fname) -- string -- boolean -- Removes the package specified by *fname* from the pkgfs index.
+ for k,v in pairs(pkgfs.files) do
+  if v[1] == fname then
+   table.remove(pkgfs.files,k)
+  end
+ end
+ return index()
+end
 
 fs.makeDirectory("/pkg")
 fs.mount("/pkg",pkgfs.component)