drop the lfs library

I can't feel confident about its sandboxing story yet. And if we can't
build a file navigator, what are we even doing with it.

README.md

@@ -125,8 +125,6 @@ rely on packages distributed by the following reputable brands:
 Teliva's codebase also includes forks of the following reputable brands:
 
 * [Lua 5.1](https://www.lua.org/manual/5.1)
-* The [Lua File System](https://keplerproject.github.io/luafilesystem) library
-  for portably accessing directories (module `lfs`).
 * The [Kilo](https://github.com/antirez/kilo) text editor, modified to use
   ncurses. (Read more about it in this [fantastic walk-through](https://viewsourcecode.org/snaptoken/kilo).)
 * The [lcurses](https://github.com/lcurses/lcurses) binding for ncurses (as
@@ -188,7 +186,6 @@ them in Teliva and let people use regular Lua. Or other platforms!
   - `os.execute`, `os.getenv`, `io.popen`
   - `io.lines` (not a security issue; just difficult to distinguish missing
     files from sandboxing issues)
-  - `lfs.chdir`, `lfs.currentdir`
 
 - Some functions are disabled because they don't seem to make sense in an
   ncurses environment. This includes the Lua notions of default files, which

commander.tlv

@@ -1,117 +0,0 @@
-# .tlv file generated by https://github.com/akkartik/teliva
-# You may edit it if you are careful; however, you may see cryptic errors if you
-# violate Teliva's assumptions.
-#
-# .tlv files are representations of Teliva programs. Teliva programs consist of
-# sequences of definitions. Each definition is a table of key/value pairs. Keys
-# and values are both strings.
-#
-# Lines in .tlv files always follow exactly one of the following forms:
-# - comment lines at the top of the file starting with '#' at column 0
-# - beginnings of definitions starting with '- ' at column 0, followed by a
-#   key/value pair
-# - key/value pairs consisting of '  ' at column 0, containing either a
-#   spaceless value on the same line, or a multi-line value
-# - multiline values indented by more than 2 spaces, starting with a '>'
-#
-# If these constraints are violated, Teliva may unceremoniously crash. Please
-# report bugs at http://akkartik.name/contact
-- __teliva_timestamp: original
-  str_helpers:
-    >-- some string helpers from http://lua-users.org/wiki/StringIndexing
-    >
-    >-- index characters using []
-    >getmetatable('').__index = function(str,i)
-    >  if type(i) == 'number' then
-    >    return str:sub(i,i)
-    >  else
-    >    return string[i]
-    >  end
-    >end
-    >
-    >-- ranges using (), selected bytes using {}
-    >getmetatable('').__call = function(str,i,j)
-    >  if type(i)~='table' then
-    >    return str:sub(i,j)
-    >  else
-    >    local t={}
-    >    for k,v in ipairs(i) do
-    >      t[k]=str:sub(v,v)
-    >    end
-    >    return t:concat()
-    >  end
-    >end
-    >
-    >-- iterate over an ordered sequence
-    >function q(x)
-    >  if type(x) == 'string' then
-    >    return x:gmatch('.')
-    >  else
-    >    return ipairs(x)
-    >  end
-    >end
-    >
-    >-- insert within string
-    >function string.insert(str1, str2, pos)
-    >  return str1:sub(1,pos)..str2..str1:sub(pos+1)
-    >end
-    >
-    >function string.remove(s, pos)
-    >  return s:sub(1,pos-1)..s:sub(pos+1)
-    >end
-    >
-    >-- TODO: backport utf-8 support from Lua 5.3
-- __teliva_timestamp: original
-  menu:
-    >-- To show app-specific hotkeys in the menu bar, add hotkey/command
-    >-- arrays of strings to the menu array.
-    >menu = {}
-- __teliva_timestamp: original
-  Window:
-    >Window = curses.stdscr()
-- __teliva_timestamp: original
-  render:
-    >function render(window)
-    >  window:clear()
-    >  for f in lfs.dir('.') do
-    >    if f ~= '.' and f ~= '..' then
-    >      local attr = lfs.attributes(f)
-    >      print(f, attr.permissions, attr.size, attr.access, attr.modification)
-    >    end
-    >  end
-    >  window:refresh()
-    >end
-- __teliva_timestamp: original
-  update:
-    >function update(window)
-    >  local key = window:getch()
-    >  -- process key here
-    >end
-- __teliva_timestamp: original
-  init_colors:
-    >function init_colors()
-    >  for i=0,7 do
-    >    curses.init_pair(i, i, -1)
-    >  end
-    >  curses.init_pair(8, 7, 0)
-    >  curses.init_pair(9, 7, 1)
-    >  curses.init_pair(10, 7, 2)
-    >  curses.init_pair(11, 7, 3)
-    >  curses.init_pair(12, 7, 4)
-    >  curses.init_pair(13, 7, 5)
-    >  curses.init_pair(14, 7, 6)
-    >  curses.init_pair(15, -1, 15)
-    >end
-- __teliva_timestamp: original
-  main:
-    >function main()
-    >  init_colors()
-    >
-    >  while true do
-    >    render(Window)
-    >    update(Window)
-    >  end
-    >end
-- __teliva_timestamp: original
-  doc:blurb:
-    >beginnings of a file browser..

src/Makefile

@@ -27,7 +27,7 @@ LUA_A=	liblua.a
 CORE_O=	lapi.o lcode.o ldebug.o ldo.o ldump.o lfunc.o lgc.o llex.o lmem.o \
 	lobject.o lopcodes.o lparser.o lstate.o lstring.o ltable.o ltm.o  \
 	lundump.o lvm.o lzio.o \
-	realpath.o lfs.o kilo.o tlv.o teliva.o
+	realpath.o kilo.o tlv.o teliva.o
 LIB_O=	lauxlib.o lbaselib.o liolib.o lmathlib.o loslib.o \
 	ltablib.o lstrlib.o linit.o
 
@@ -167,7 +167,6 @@ lzio.o: lzio.c lua.h luaconf.h llimits.h lmem.h lstate.h lobject.h ltm.h \
 print.o: print.c ldebug.h lstate.h lua.h luaconf.h lobject.h llimits.h \
   ltm.h lzio.h lmem.h lopcodes.h lundump.h
 realpath.o: realpath.c
-lfs.o: lfs.c lfs.h lua.h lauxlib.h lualib.h
 kilo.o: kilo.c lua.h teliva.h
 teliva.o: teliva.c lua.h lauxlib.h lualib.h teliva.h tlv.h
 

src/lfs.h

@@ -1,35 +0,0 @@
-/*
-** LuaFileSystem
-** Copyright Kepler Project 2003 - 2020
-** (http://keplerproject.github.io/luafilesystem)
-*/
-
-/* Define 'chdir' for systems that do not implement it */
-#ifdef NO_CHDIR
-#define chdir(p)	(-1)
-#define chdir_error	"Function 'chdir' not provided by system"
-#else
-#define chdir_error	strerror(errno)
-#endif
-
-#ifdef _WIN32
-#define chdir(p) (_chdir(p))
-#define getcwd(d, s) (_getcwd(d, s))
-#define rmdir(p) (_rmdir(p))
-#define LFS_EXPORT __declspec (dllexport)
-#ifndef fileno
-#define fileno(f) (_fileno(f))
-#endif
-#else
-#define LFS_EXPORT
-#endif
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-  LFS_EXPORT int luaopen_lfs(lua_State * L);
-
-#ifdef __cplusplus
-}
-#endif

src/linit.c

@@ -21,7 +21,6 @@ static const luaL_Reg lualibs[] = {
   {LUA_OSLIBNAME, luaopen_os},
   {LUA_STRLIBNAME, luaopen_string},
   {LUA_MATHLIBNAME, luaopen_math},
-  {LUA_LFSLIBNAME, luaopen_lfs},
   {LUA_CURSESLIBNAME, luaopen_curses},
   {LUA_SOCKETCORELIBNAME, luaopen_socket_core},
   {LUA_MIMECORELIBNAME, luaopen_mime_core},

src/lualib.h

@@ -33,9 +33,6 @@ LUALIB_API int (luaopen_string) (lua_State *L);
 #define LUA_MATHLIBNAME	"math"
 LUALIB_API int (luaopen_math) (lua_State *L);
 
-#define LUA_LFSLIBNAME	"lfs"
-LUALIB_API int (luaopen_lfs) (lua_State *L);
-
 #define LUA_CURSESLIBNAME	"curses"
 LUALIB_API int (luaopen_curses) (lua_State *L);