add LuaTreeFindFile, doc and option

README.md

@@ -18,9 +18,12 @@ Plug 'kyazdani42/nvim-tree.lua'
 let g:lua_tree_side = 'right' | 'left' "left by default
 let g:lua_tree_size = 40 "30 by default
 let g:lua_tree_ignore = [ '.git', 'node_modules', '.cache' ] "empty by default, not working on mac atm
+let g:lua_tree_follow = 1 "0 by default, this option will bind BufEnter to the LuaTreeFindFile command
+" :help LuaTreeFindFile for more info
 
 nnoremap <C-n> :LuaTreeToggle<CR>
-nnoremap <leader>n :LuaTreeRefresh<CR>
+nnoremap <leader>r :LuaTreeRefresh<CR>
+nnoremap <leader>n :LuaTreeFindFile<CR>
 ```
 
 ## KeyBindings
@@ -52,18 +55,22 @@ nnoremap <leader>n :LuaTreeRefresh<CR>
 
 ![alt text](.github/screenshot.png?raw=true "file explorer")
 
-## TODO 1
+## TODO
+
+### Perf / Fixes
 - Tree creation should be async
-- sneak like cd command to find a directory
-- better default colors (use default vim groups)
-- give user option to choose for file generation command
-- command to find current file in the directory structure
 - refactor all `system` call to `libuv` functions, with better error management
-- create proper highlight groups or add highlight function to give the user ability to setup colors themselves
 - bufferize leafs of node being closed so when opening again the node, we open every directory that was previously open
+
+### Features
+- sneak like cd command to find a file/directory
+- better default colors (use default vim groups)
+- create proper highlight groups or add highlight function to give the user ability to setup colors themselves
+- add `<C-t>` to open buffer in new tab
+
+### Window Feature
 - better window management: 
   - check tree buffer/window for change so we can avoid it being resized or moved around or replaced by another file
   - monitor window layout in current tab to open files in the right place
-  - add `<C-t>` to open buffer in new tab
 > this might be a little hard to implement since window layout events do not exist yet
 

doc/nvim-tree-lua.txt

@@ -26,6 +26,14 @@ open or close the tree
 |:LuaTreeRefresh|			          *:LuaTreeRefresh*
 
 refresh the tree
+
+|:LuaTreeFindFile|				  *:LuaTreeFindFile*
+
+The command will change the cursor in the tree for the current bufname.
+
+It will also open the leafs of the tree leading to the file in the buffer 
+(if you opened a file with something else than the LuaTree, like `fzf`)
+
 ==============================================================================
 OPTIONS				                  *nvim-tree-options*
 
@@ -45,6 +53,12 @@ Each pattern is passed into the 'ls' function as `--ignore=PATTERN`
 >
     example: let g:lua_tree_ignore = [ '.git', 'node_modules' ]
 <
+
+|g:lua_tree_follow|				*g:lua_tree_follow*
+
+Can be `0` or `1`. When `1`, will bind |:LuaTreeFindFile| to |BufEnter|
+
+
 ==============================================================================
 INFORMATIONS				        *nvim-tree-info*
 

lua/lib/state.lua

@@ -119,6 +119,38 @@ local function refresh_tree()
     end
 end
 
+local function clone(obj)
+  if type(obj) ~= 'table' then return obj end
+  local res = {}
+  for k, v in pairs(obj) do res[clone(k)] = clone(v) end
+  return res
+end
+
+local function find_file(path)
+    local relpath = string.sub(path, #ROOT_PATH + 1, -1)
+
+    local tree_copy = clone(Tree)
+
+    for i, node in pairs(tree_copy) do
+        if node.relpath and string.match(relpath, node.relpath) then
+            if node.relpath == relpath then
+                Tree = clone(tree_copy)
+                return i
+            end
+            if node.dir and not node.open then
+                local path = node.path .. node.name
+                node.open = true
+                local dirs = list_dirs(path)
+                for j, n in pairs(create_nodes(path, node.relpath, node.depth + 1, dirs)) do
+                    table.insert(tree_copy, i + j, n)
+                end
+            end
+        end
+    end
+
+    return nil
+end
+
 local function open_dir(tree_index)
     local node = Tree[tree_index];
     node.open = not node.open
@@ -152,4 +184,5 @@ return {
     open_dir = open_dir;
     set_root_path = set_root_path;
     get_cwd = get_cwd;
+    find_file = find_file;
 }

lua/tree.lua

@@ -16,6 +16,7 @@ local init_tree = state.init_tree
 local open_dir = state.open_dir
 local refresh_tree = state.refresh_tree
 local set_root_path = state.set_root_path
+local find_file = state.find_file
 
 local winutils = require 'lib/winutils'
 local update_view = winutils.update_view
@@ -24,6 +25,7 @@ local close = winutils.close
 local open = winutils.open
 local set_mappings = winutils.set_mappings
 local replace_tree = winutils.replace_tree
+local get_win = winutils.get_win
 
 local git = require 'lib/git'
 local refresh_git = git.refresh_git
@@ -147,6 +149,19 @@ local function check_buffer_and_open()
     end
 end
 
+local function find()
+    local line = find_file(api.nvim_buf_get_name(0))
+    if not line then return end
+
+    update_view()
+
+    local win = get_win()
+    if win then 
+        api.nvim_win_set_cursor(win, { line, 0 })
+    end
+
+end
+
 return {
     toggle = toggle;
     open_file = open_file;
@@ -155,5 +170,6 @@ return {
     check_windows_and_close = check_windows_and_close;
     check_buffer_and_open = check_buffer_and_open;
     replace_tree = replace_tree;
+    find = find;
 }
 

plugin/tree.vim

@@ -12,6 +12,10 @@ au BufWritePost * lua require'tree'.refresh()
 au BufEnter * lua require'tree'.check_windows_and_close()
 au VimEnter * lua require'tree'.check_buffer_and_open()
 
+if get(g:, 'lua_tree_follow') != 0
+    au BufEnter * :LuaTreeFindFile
+endif
+
 " TODO: WinEnter is not the right autocommand for this task,
 " but we do not have LayoutChange or WinMove kind of option atm,
 " so this is deactivated by default to avoid messing up users workflows
@@ -20,6 +24,7 @@ au VimEnter * lua require'tree'.check_buffer_and_open()
 
 command! LuaTreeToggle lua require'tree'.toggle()
 command! LuaTreeRefresh lua require'tree'.refresh()
+command! LuaTreeFindFile lua require'tree'.find()
 
 let &cpo = s:save_cpo
 unlet s:save_cpo