z.lua 1.8.3: polish interactive mode in z -b -i

README.md

@@ -460,7 +460,7 @@ As you see, z.lua is the fastest one and requires less resource.
 
 ## History
 
-- 1.8.2 (2020-02-09): new: `z -b -i` and `z -b -I` to jump backwards in interactive mode.
+- 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: `$_ZL_HYPHEN` to treat hyphen as a normal character, see [here](https://github.com/skywind3000/z.lua/wiki/FAQ#how-to-input-a-hyphen---in-the-keyword-).
 - 1.7.3 (2019-09-07): use [lua-filesystem](http://keplerproject.github.io/luafilesystem/) package if possible when `$_ZL_USE_LFS` is `1`.
 - 1.7.2 (2019-08-01): Improve bash/zsh shell compatibility by [@barlik](https://github.com/barlik).

z.lua

@@ -4,7 +4,7 @@
 -- z.lua - a cd command that learns, by skywind 2018, 2019, 2020
 -- Licensed under MIT license.
 --
--- Version 1.8.2, Last Modified: 2020/02/09 23:33
+-- Version 1.8.3, Last Modified: 2020/02/10 00:05
 --
 -- * 10x faster than fasd and autojump, 3x faster than z.sh
 -- * available for posix shells: bash, zsh, sh, ash, dash, busybox
@@ -1814,19 +1814,12 @@ function cd_breadcrumbs(pwd, interactive)
 	if fp ~= io.stderr then
 		fp:close()
 	end
+	local retval = ''
 	-- select from stdin or fzf
 	if interactive == 1 then
 		io.stderr:write('> ')
 		io.stderr:flush()
-		local input = io.read('*l')
-		if input == nil or input == '' then
-			return nil
-		end
-		local index = tonumber(input)
-		if index == nil or index < 1 or index > #elements then
-			return nil
-		end
-		retval = elements[index][2]
+		retval = io.read('*l')
 	elseif interactive == 2 then
 		local fzf = os.environ('_ZL_FZF', 'fzf')
 		local cmd = '--reverse --inline-info --tac '
@@ -1852,13 +1845,12 @@ function cd_breadcrumbs(pwd, interactive)
 			return nil
 		end
 		retval = retval:sub(1, pos - 1):gsub('^%s*', '')
-		index = tonumber((retval == nil) and '0' or retval)
-		if index == nil or index < 1 or index > #elements then
-			return nil
-		end
-		retval = elements[index][2]
 	end
-	return retval
+	local index = tonumber(retval)
+	if index == nil or index < 1 or index > #elements then
+		return nil
+	end
+	return elements[index][2]
 end