add symlink handling

README.md

@@ -22,7 +22,6 @@
 - [ ] buffer / window should not disappear when only the tree is opened
 - [ ] buffer / window should always stay on the left and never change size (open a file with only the tree open to reproduce this bug)
 
-- [ ] handle symbolic links
 - [ ] quickly find file in the directory structure
 - [ ] update tree automatically on window change
 

lua/lib/colors.lua

@@ -14,6 +14,7 @@ local colors = {
 }
 
 local HIGHLIGHTS = {
+    Symlink = { gui = 'bold', fg = colors.cyan },
     FolderName = { gui = 'bold', fg = colors.blue },
     FolderIcon = { fg = colors.orange },
 

lua/lib/format.lua

@@ -73,10 +73,13 @@ local function format_tree(tree)
         local padding = get_padding(node.depth)
         local git = node.git
         local icon = ""
-        if node.icon == true then
+        local name = node.name
+        if node.link == true then
+            name = name .. ' ➛ ' .. node.linkto
+        elseif node.icon == true then
             icon = get_icon(node.path .. node.name, node.dir, node.open)
         end
-        dirs[i] = padding ..  icon .. git .. node.name
+        dirs[i] = padding ..  icon .. git .. name
     end
 
     return dirs
@@ -120,6 +123,9 @@ local function highlight_line(buffer)
             highlight('LuaTreeFolderIcon', line, 0, text_start)
             highlight('LuaTreeFolderName', line, text_start + gitlen, -1)
 
+        elseif node.link == true then
+            highlight('LuaTreeSymlink', line, 0, -1)
+
         elseif is_special(node.name) == true then
             text_start = text_start - 4
             highlight('LuaTreeSpecialFile', line, text_start + gitlen, -1)

lua/lib/state.lua

@@ -6,10 +6,19 @@ local get_git_attr = require 'lib/git'.get_git_attr
 local Tree = {}
 
 local function is_dir(path)
-    local stat = vim.loop.fs_stat(path)
+    local stat = vim.loop.fs_lstat(path)
     return stat and stat.type == 'directory' or false
 end
 
+local function is_symlink(path)
+    local stat = vim.loop.fs_lstat(path)
+    return stat and stat.type == 'link' or false
+end
+
+local function link_to(path)
+    return vim.loop.fs_readlink(path) or ''
+end
+
 local function check_dir_access(path)
     return vim.loop.fs_access(path, 'R') == true
 end
@@ -46,11 +55,16 @@ local function create_nodes(path, relpath, depth, dirs)
     if not string.find(relpath, '^.*/$') and depth > 0 then relpath = relpath .. '/' end
 
     for i, name in pairs(dirs) do
-        local dir = is_dir(path..name)
+        local full_path = path..name
+        local dir = is_dir(full_path)
+        local link = is_symlink(full_path)
+        local linkto = link == true and link_to(full_path) or nil
         local rel_path = relpath ..name
         tree[i] = {
             path = path,
             relpath = rel_path,
+            link = link,
+            linkto = linkto,
             name = name,
             depth = depth,
             dir = dir,
@@ -137,4 +151,5 @@ return {
     refresh_tree = refresh_tree;
     open_dir = open_dir;
     check_dir_access = check_dir_access;
+    is_dir = is_dir;
 }

lua/tree.lua

@@ -11,6 +11,7 @@ local init_tree = stateutils.init_tree
 local open_dir = stateutils.open_dir
 local check_dir_access = stateutils.check_dir_access
 local refresh_tree = stateutils.refresh_tree
+local is_dir = stateutils.is_dir
 
 local winutils = require 'lib/winutils'
 local update_view = winutils.update_view
@@ -60,6 +61,7 @@ local function open_file(open_type)
         force_refresh_git()
         init_tree(new_path)
         update_view()
+
     elseif open_type == 'chdir' then
         if node.dir == false or check_dir_access(node.path .. node.name) == false then return end
 
@@ -69,9 +71,26 @@ local function open_file(open_type)
         force_refresh_git()
         init_tree(new_path)
         update_view()
+
+    elseif node.link == true then
+        local link_to_dir = is_dir(node.linkto)
+        if link_to_dir == true and check_dir_access(node.linkto) == false then return end
+
+        if link_to_dir == true then
+            api.nvim_command('cd ' .. node.linkto)
+            local new_path = get_cwd() .. '/'
+            set_root_path(new_path)
+            force_refresh_git()
+            init_tree(new_path)
+            update_view()
+        else
+            api.nvim_command('wincmd l | '..open_type..' '.. node.linkto)
+        end
+
     elseif node.dir == true then
         open_dir(tree_index)
         update_view(true)
+
     else
         api.nvim_command('wincmd l | '..open_type..' '.. node.path .. node.name)
     end