diff --git a/Cargo.lock b/Cargo.lock
index b3f6cce52..8f38f66d4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -80,9 +80,10 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-queue"
-version = "0.2.0"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam-utils 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -152,7 +153,7 @@ dependencies = [
  "bytecount 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "extracted_fzy 0.1.0",
  "fuzzy-matcher 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "rayon 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rayon 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.44 (registry+https://github.com/rust-lang/crates.io-index)",
  "structopt 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -202,21 +203,21 @@ dependencies = [
 
 [[package]]
 name = "rayon"
-version = "1.2.1"
+version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "crossbeam-deque 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "either 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "rayon-core 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rayon-core 1.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "rayon-core"
-version = "1.6.1"
+version = "1.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "crossbeam-deque 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "crossbeam-queue 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-queue 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam-utils 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 1.11.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -370,7 +371,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5067f5bb2d80ef5d68b4c87db81601f0b75bca627bc2ef76b141d7b846a3c6d9"
 "checksum crossbeam-deque 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)" = "c3aa945d63861bfe624b55d153a39684da1e8c0bc8fba932f7ee3a3c16cea3ca"
 "checksum crossbeam-epoch 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5064ebdbf05ce3cb95e45c8b086f72263f4166b29b97f6baff7ef7fe047b55ac"
-"checksum crossbeam-queue 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "dfd6515864a82d2f877b42813d4553292c6659498c9a2aa31bab5a15243c2700"
+"checksum crossbeam-queue 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c695eeca1e7173472a32221542ae469b3e9aac3a4fc81f7696bcad82029493db"
 "checksum crossbeam-utils 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ce446db02cdc3165b94ae73111e570793400d0794e46125cc4056c81cbb039f4"
 "checksum either 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "bb1f6b1ce1c140482ea30ddd3335fc0024ac7ee112895426e0a629a6c20adfe3"
 "checksum fuzzy-matcher 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "4d860c6f043a7f367ffcbdb5833c36f7dc85fa8bc6e7898e2530f643ec90f9f3"
@@ -384,8 +385,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum proc-macro-error 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "aeccfe4d5d8ea175d5f0e4a2ad0637e0f4121d63bd99d356fb1f39ab2e7c6097"
 "checksum proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "9c9e470a8dc4aeae2dee2f335e8f533e2d4b347e1434e5671afc49b054592f27"
 "checksum quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "053a8c8bcc71fcce321828dc897a98ab9760bef03a4fc36693c231e5b3216cfe"
-"checksum rayon 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "43739f8831493b276363637423d3622d4bd6394ab6f0a9c4a552e208aeb7fddd"
-"checksum rayon-core 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)" = "f8bf17de6f23b05473c437eb958b9c850bfc8af0961fe17b4cc92d5a627b4791"
+"checksum rayon 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "db6ce3297f9c85e16621bb8cca38a06779ffc31bb8184e1be4bed2be4678a098"
+"checksum rayon-core 1.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "08a89b46efaf957e52b18062fb2f4660f8b8a4dde1807ca002690868ef2c85a9"
 "checksum rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
 "checksum ryu 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "bfa8506c1de11c9c4e4c38863ccbe02a305c8188e85a05a784c9e11e1c3910c8"
 "checksum scopeguard 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b42e15e59b18a828bbf5c58ea01debb36b9b096346de35d941dcb89009f24a0d"
diff --git a/autoload/clap.vim b/autoload/clap.vim
index dad1b6a91..7e167c4ae 100644
--- a/autoload/clap.vim
+++ b/autoload/clap.vim
@@ -264,11 +264,11 @@ function! s:clear_state() abort
         \ 'g:__clap_initial_source_size',
         \ ])
 
-  if exists('g:__clap_forerunner_tmp_file')
-    if filereadable(g:__clap_forerunner_tmp_file)
-      call delete(g:__clap_forerunner_tmp_file)
+  if exists('g:__clap_forerunner_tempfile')
+    if filereadable(g:__clap_forerunner_tempfile)
+      call delete(g:__clap_forerunner_tempfile)
     endif
-    unlet g:__clap_forerunner_tmp_file
+    unlet g:__clap_forerunner_tempfile
   endif
 endfunction
 
diff --git a/autoload/clap/api.vim b/autoload/clap/api.vim
index 964a22482..d6ed7ba8e 100644
--- a/autoload/clap/api.vim
+++ b/autoload/clap/api.vim
@@ -413,8 +413,8 @@ function! s:init_provider() abort
   " Pipe the source into the external filter
   function! s:wrap_async_cmd(source_cmd) abort
     let ext_filter_cmd = clap#filter#get_external_cmd_or_default()
-    if exists('g:__clap_forerunner_tmp_file')
-      let cmd = s:read_from_file_or_pipe(ext_filter_cmd, g:__clap_forerunner_tmp_file)
+    if exists('g:__clap_forerunner_tempfile')
+      let cmd = s:read_from_file_or_pipe(ext_filter_cmd, g:__clap_forerunner_tempfile)
     else
       " FIXME Does it work well in Windows?
       " Run the source command and pipe into the external filter.
diff --git a/autoload/clap/forerunner.vim b/autoload/clap/forerunner.vim
index 7d77adce1..ec1791c4b 100644
--- a/autoload/clap/forerunner.vim
+++ b/autoload/clap/forerunner.vim
@@ -34,12 +34,31 @@ function! s:on_complete() abort
   else
     let tmp = tempname()
     if writefile(s:chunks, tmp) == 0
-      let g:__clap_forerunner_tmp_file = tmp
+      let g:__clap_forerunner_tempfile = tmp
     endif
     unlet s:chunks
   endif
 endfunction
 
+function! s:on_complete_maple() abort
+  if !empty(s:chunks)
+    let decoded = json_decode(s:chunks[0])
+
+    if empty(g:clap.input.get())
+      call g:clap.display.set_lines_lazy(decoded.lines)
+    endif
+
+    let g:clap.display.initial_size = decoded.total
+    call clap#impl#refresh_matches_count(string(decoded.total))
+
+    if has_key(decoded, 'tempfile')
+      let g:__clap_forerunner_tempfile = decoded.tempfile
+    else
+      let g:__clap_forerunner_result = decoded.lines
+    endif
+  endif
+endfunction
+
 function! s:on_event(job_id, data, event) abort
   " We only process the job that was spawned last time.
   if a:job_id == s:job_id
@@ -56,28 +75,83 @@ function! s:on_event(job_id, data, event) abort
   endif
 endfunction
 
+function! s:on_event_maple(job_id, data, event) abort
+  " We only process the job that was spawned last time.
+  if a:job_id == s:job_id
+    if a:event ==# 'stdout'
+      if len(a:data) > 1
+        " Second last is the real last one for neovim.
+        call extend(s:chunks, a:data[:-2])
+      endif
+    elseif a:event ==# 'stderr'
+      " Ignore the error
+    else
+      call s:on_complete_maple()
+    endif
+  endif
+endfunction
+
 function! s:close_cb(channel) abort
   if clap#job#vim8_job_id_of(a:channel) == s:job_id
     " https://github.com/vim/vim/issues/5143
-    let s:chunks = split(ch_readraw(a:channel), "\n")
-    call s:on_complete()
+    if ch_canread(a:channel)
+      let s:chunks = split(ch_readraw(a:channel), "\n")
+      call s:on_complete()
+    endif
+  endif
+endfunction
+
+function! s:close_cb_maple(channel) abort
+  if clap#job#vim8_job_id_of(a:channel) == s:job_id
+    if ch_canread(a:channel)
+      let s:chunks = split(ch_readraw(a:channel), "\n")
+      call s:on_complete_maple()
+    endif
   endif
 endfunction
 
 if has('nvim')
+  function! s:start_maple(cmd) abort
+    let s:job_id = clap#job#start_buffered(a:cmd, function('s:on_event_maple'))
+  endfunction
+
   function! s:start_forerunner(cmd) abort
     let s:job_id = clap#job#start_buffered(a:cmd, function('s:on_event'))
   endfunction
 else
+  function! s:start_maple(cmd) abort
+    let s:job_id = clap#job#start_buffered(a:cmd, function('s:close_cb_maple'))
+  endfunction
+
   function! s:start_forerunner(cmd) abort
     let s:job_id = clap#job#start_buffered(a:cmd, function('s:close_cb'))
   endfunction
 endif
 
-function! clap#forerunner#start(cmd) abort
-  let s:chunks = []
-  call clap#rooter#run(function('s:start_forerunner'), a:cmd)
-endfunction
+if clap#maple#is_available()
+  let s:empty_filter_cmd = printf(clap#maple#filter_cmd_fmt(), '')
+
+  function! s:into_maple_cmd(cmd) abort
+    let cmd_dir = clap#rooter#working_dir()
+    let cmd = printf('%s --cmd "%s" --cmd-dir "%s" --output-threshold %d',
+          \ s:empty_filter_cmd,
+          \ a:cmd,
+          \ cmd_dir,
+          \ s:builtin_fuzzy_filter_threshold,
+          \ )
+    return cmd
+  endfunction
+
+  function! clap#forerunner#start(cmd) abort
+    let s:chunks = []
+    call s:start_maple(s:into_maple_cmd(a:cmd))
+  endfunction
+else
+  function! clap#forerunner#start(cmd) abort
+    let s:chunks = []
+    call clap#rooter#run(function('s:start_forerunner'), a:cmd)
+  endfunction
+endif
 
 function! clap#forerunner#stop() abort
   if s:job_id > 0
diff --git a/autoload/clap/rooter.vim b/autoload/clap/rooter.vim
index 4679a2a4d..a4d81a075 100644
--- a/autoload/clap/rooter.vim
+++ b/autoload/clap/rooter.vim
@@ -27,6 +27,22 @@ function! clap#rooter#try_set_cwd() abort
   endif
 endfunction
 
+function! clap#rooter#working_dir() abort
+  if exists('g:__clap_provider_cwd')
+    let dir = g:__clap_provider_cwd
+  elseif clap#should_use_raw_cwd()
+    let dir = getcwd()
+  else
+    let git_root = clap#util#find_git_root(g:clap.start.bufnr)
+    if empty(git_root)
+      let dir = expand('#'.g:clap.start.bufnr.':p:h')
+    else
+      let dir = git_root
+    endif
+  endif
+  return dir
+endfunction
+
 function! s:run_from_target_dir(target_dir, Run, run_args) abort
   let save_cwd = getcwd()
   try
diff --git a/src/main.rs b/src/main.rs
index 6689612ac..776bc0487 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -90,8 +90,14 @@ impl Maple {
                 .collect::<Vec<String>>();
 
             let mut cmd = Command::new(args[0].clone());
-            if let Some(ref cmd_dir) = self.cmd_dir {
-                cmd.current_dir(cmd_dir);
+            if let Some(cmd_dir) = self.cmd_dir.clone() {
+                if cmd_dir.is_dir() {
+                    cmd.current_dir(cmd_dir);
+                } else {
+                    let mut cmd_dir = cmd_dir;
+                    cmd_dir.pop();
+                    cmd.current_dir(cmd_dir);
+                }
             }
             cmd.args(&args[1..]);