update lfs detection

Update README.md

README.md

@@ -13,16 +13,26 @@ z.lua is a faster way to navigate your filesystem. It tracks your most used dire
 
 For example, `z foo bar` would match `/foo/bar` but not `/bar/foo`.
 
+## Reputation
+
+From people using z.lua:
+
+- I like this in principal. I’m pretty damn predictable at the command line and far too lazy to make shortcuts
+- It feels far more intuitive and it's so incredibly convenient to be able to jump between folders I'm working in without having to traverse an entire tree. The shell used to feel so constraining for me, but tools like this are making me enjoy it so much more. 
+- I can finally have autojump-like functionality on my Raspberry Pi 1 without waiting 30 seconds every time I open a new shell. Thanks z.lua devs.
+- Anyway, z.lua is a promising project. If you only need directory jumping, it may be the best choice.
+
 
 ## Features
 
 - **10x** times faster than **fasd** and **autojump**, **3x** times faster than **z.sh**.
+- Gain the ultimate speed with an optional [native module](https://github.com/skywind3000/czmod) written in C.
 - Available for **posix shells**: bash, zsh, dash, sh, ash, ksh, busybox and etc.
 - Available for Fish Shell, Power Shell and Windows cmd.
 - [Enhanced matching algorithm](#enhanced-matching) takes you to where ever you want precisely.
 - Allow updating database only if `$PWD` changed with "$_ZL_ADD_ONCE" set to 1.
 - Interactive selection enables you to choose where to go before cd.
-- Intergrated with FZF (optional) for interactive selection and completion.
+- Integrated with FZF (optional) for interactive selection and completion.
 - Quickly go back to a parent directory instead of typing "cd ../../..".
 - Corresponding experience in different shells and operating systems. 
 - Compatible with Lua 5.1, 5.2 and 5.3+
@@ -448,18 +458,26 @@ sys     0m0.030s
 
 As you see, z.lua is the fastest one and requires less resource.
 
+## Native Module
 
+z.lua is fast enough for most case, the path tracking action will be triggered each time when you change your current directory.
 
-## Reputation
+So I still recommend the pure lua script for portability and flexibility, but for someone who really care about `10ms` or `1ms` things, this module can help them to gain the ultimate speed.
+
+- [czmod](https://github.com/skywind3000/czmod): native module to boost `z.lua`.
+
+Average performance:
+
+| Name | czmod |  z.lua |
+|-|-|-|-|-|
+| **Update Time** | 1.6ms | 13.2ms |
+| **Query Time** | 1.5ms | 9.8ms |
 
-- "I like this in principal. I’m pretty damn predictable at the command line and far too lazy to make shortcuts"
-- "It feels far more intuitive and it's so incredibly convenient to be able to jump between folders I'm working in without having to traverse an entire tree. The shell used to feel so constraining for me, but tools like this are making me enjoy it so much more. "
-- "I can finally have autojump-like functionality on my Raspberry Pi 1 without waiting 30 seconds every time I open a new shell. Thanks z.lua devs."
-- "Anyway, z.lua is a promising project. If you only need directory jumping, it may be the best choice."
 
 
 ## History
 
+- 1.8.7 (2020-06-29): use lfs or luajit's cffi if possible.
 - 1.8.4 (2020-02-10): fish shell: set `$_ZL_ECHO` to global scope.
 - 1.8.3 (2020-02-09): new: `z -b -i` and `z -b -I` to jump backwards in interactive mode.
 - 1.7.4 (2019-12-29): new: `$_ZL_HYPHEN` to treat hyphen as a normal character, see [here](https://github.com/skywind3000/z.lua/wiki/FAQ#how-to-input-a-hyphen---in-the-keyword-).

init.fish

@@ -17,7 +17,12 @@ end
 
 set -x _ZL_DATA "$_ZL_DATA"
 
-set _zlua_dir (dirname (status --current-filename))
+set -q XDG_CONFIG_HOME; or set XDG_CONFIG_HOME ~/.config
+if functions -q fisher
+	set _zlua_dir $XDG_CONFIG_HOME/fisher/github.com/skywind3000/z.lua
+else
+	set _zlua_dir (dirname (status --current-filename))
+end
 
 if test -e $_zlua_dir/z.lua 
 	if type -q lua

z.lua

@@ -4,7 +4,7 @@
 -- z.lua - a cd command that learns, by skywind 2018, 2019, 2020
 -- Licensed under MIT license.
 --
--- Version 1.8.4, Last Modified: 2020/02/10 19:22
+-- Version 1.8.7, Last Modified: 2020/06/29 18:04
 --
 -- * 10x faster than fasd and autojump, 3x faster than z.sh
 -- * available for posix shells: bash, zsh, sh, ash, dash, busybox
@@ -319,14 +319,16 @@ if os.native.status then
 		uint32_t GetTickCount(void);
 		uint32_t GetFileAttributesA(const char *name);
 		uint32_t GetCurrentDirectoryA(uint32_t size, char *ptr);
+		uint32_t GetShortPathNameA(const char *longname, char *shortname, uint32_t size);
+		uint32_t GetLongPathNameA(const char *shortname, char *longname, uint32_t size);
 		]]
 		local kernel32 = ffi.load('kernel32.dll')
-		local buffer = ffi.new('char[?]', 300)
+		local buffer = ffi.new('char[?]', 4100)
 		local INVALID_FILE_ATTRIBUTES = 0xffffffff
 		local FILE_ATTRIBUTE_DIRECTORY = 0x10
 		os.native.kernel32 = kernel32
 		function os.native.GetFullPathName(name)
-			local hr = kernel32.GetFullPathNameA(name, 290, buffer, nil)
+			local hr = kernel32.GetFullPathNameA(name, 4096, buffer, nil)
 			return (hr > 0) and ffi.string(buffer, hr) or nil
 		end
 		function os.native.ReplaceFile(replaced, replacement)
@@ -339,6 +341,21 @@ if os.native.status then
 		function os.native.GetFileAttributes(name)
 			return kernel32.GetFileAttributesA(name)
 		end
+		function os.native.GetLongPathName(name)
+			local hr = kernel32.GetLongPathNameA(name, buffer, 4096)
+			return (hr ~= 0) and ffi.string(buffer, hr) or nil
+		end
+		function os.native.GetShortPathName(name)
+			local hr = kernel32.GetShortPathNameA(name, buffer, 4096)
+			return (hr ~= 0) and ffi.string(buffer, hr) or nil
+		end
+		function os.native.GetRealPathName(name)
+			local short = os.native.GetShortPathName(name)
+			if short then
+				return os.native.GetLongPathName(short)
+			end
+			return nil
+		end
 		function os.native.exists(name)
 			local attr = os.native.GetFileAttributes(name)
 			return attr ~= INVALID_FILE_ATTRIBUTES
@@ -352,7 +369,7 @@ if os.native.status then
 			return (attr % (2 * isdir)) >= isdir
 		end
 		function os.native.getcwd()
-			local hr = kernel32.GetCurrentDirectoryA(299, buffer)
+			local hr = kernel32.GetCurrentDirectoryA(4096, buffer)
 			if hr <= 0 then return nil end
 			return ffi.string(buffer, hr)
 		end
@@ -554,6 +571,9 @@ function os.path.exists(name)
 	if name == '/' then
 		return true
 	end
+	if os.native and os.native.exists then
+		return os.native.exists(name)
+	end
 	local ok, err, code = os.rename(name, name)
 	if not ok then
 		if code == 13 then
@@ -1357,6 +1377,14 @@ function z_add(path)
 				end
 			end
 			if not skip then
+				if windows then
+					if os.native and os.native.GetRealPathName then
+						local ts = os.native.GetRealPathName(path)
+						if ts then
+							path = ts
+						end
+					end
+				end
 				M = data_insert(M, path)
 				count = count + 1
 			end
@@ -2201,16 +2229,16 @@ fi
 local script_complete_zsh = [[
 _zlua_zsh_tab_completion() {
 	# tab completion
-	local compl
-	read -l compl
 	(( $+compstate )) && compstate[insert]=menu # no expand
-	reply=(${(f)"$(_zlua --complete "$compl")"})
+	local -a tmp=(${(f)"$(_zlua --complete "${words/_zlua/z}")"})
+	_describe "directory" tmp -U
 }
-compctl -U -K _zlua_zsh_tab_completion _zlua
+if [ "${+functions[compdef]}" -ne 0 ]; then
+	compdef _zlua_zsh_tab_completion _zlua 2> /dev/null
+fi
 ]]
 
 
-
 -----------------------------------------------------------------------
 -- initialize bash/zsh
 ----------------------------------------------------------------------
@@ -2231,6 +2259,10 @@ function z_shell_init(opts)
 	local prompt_hook = (not os.environ("_ZL_NO_PROMPT_COMMAND", false))
 	local once = os.environ("_ZL_ADD_ONCE", false) or opts.once ~= nil
 
+	if opts.clean ~= nil then
+		prompt_hook = false
+	end
+
 	if opts.bash ~= nil then
 		if prompt_hook then
 			if once then
@@ -2400,11 +2432,17 @@ function z_fish_init(opts)
 	print('set -x ZLUA_SCRIPT "' .. os.scriptname() .. '"')
 	print('set -x ZLUA_LUAEXE "' .. os.interpreter() .. '"')
 	local once = (os.getenv("_ZL_ADD_ONCE") ~= nil) or opts.once ~= nil
+	local prompt_hook = (not os.environ("_ZL_NO_PROMPT_COMMAND", false))
+	if opts.clean ~= nil then
+		prompt_hook = false
+	end
 	print(script_zlua_fish)
-	if once then
+	if prompt_hook then
-		print(script_init_fish_once)
+		if once then
-	else
+			print(script_init_fish_once)
-		print(script_init_fish)
+		else
+			print(script_init_fish)
+		end
 	end
 	print(script_complete_fish)
 	if opts.enhanced ~= nil then
@@ -2594,6 +2632,10 @@ if (!$env:_ZL_NO_PROMPT_COMMAND -and (!$global:_zlua_inited)) {
 -- initialize cmd/powershell
 -----------------------------------------------------------------------
 function z_windows_init(opts)
+	local prompt_hook = (not os.environ("_ZL_NO_PROMPT_COMMAND", false))
+	if opts.clean ~= nil then
+		prompt_hook = false
+	end
 	if opts.powershell ~= nil then
 		print('$script:ZLUA_LUAEXE = "' .. os.interpreter() .. '"')
 		print('$script:ZLUA_SCRIPT = "' .. os.scriptname() .. '"')
@@ -2610,7 +2652,9 @@ function z_windows_init(opts)
 		if opts.nc ~= nil then
 			print('$env:_ZL_NO_CHECK = 1')
 		end
-		print(script_init_powershell)
+		if prompt_hook then
+			print(script_init_powershell)
+		end
 	else
 		print('@echo off')
 		print('setlocal EnableDelayedExpansion')
@@ -2648,6 +2692,7 @@ end
 -----------------------------------------------------------------------
 os.lfs = {}
 os.lfs.enable = os.getenv('_ZL_USE_LFS')
+os.lfs.enable = '1'
 if os.lfs.enable ~= nil then
 	local m = string.lower(os.lfs.enable)
 	if (m == '1' or m == 'yes' or m == 'true' or m == 't') then
@@ -2683,4 +2728,3 @@ if not pcall(debug.getlocal, 4, 1) then
 end
 
 
-