From dcd4a235befc5cd6d63b2d599db4f44da463b698 Mon Sep 17 00:00:00 2001
From: noir4y <210010039+noir4y@users.noreply.github.com>
Date: Sun, 8 Feb 2026 14:59:56 +0900
Subject: [PATCH 1/2] chore: add stylua format checks in CI and apply Lua
 formatting

---
 .github/workflows/ci.yml                    | 14 ++++++++++
 .stylua.toml                                |  6 +++++
 Makefile                                    | 10 ++++++-
 README.md                                   | 16 ++++++++++++
 lua/comment-translate/commands.lua          |  2 +-
 lua/comment-translate/config.lua            | 10 +++++--
 lua/comment-translate/init.lua              |  5 +++-
 lua/comment-translate/parser/init.lua       |  2 +-
 lua/comment-translate/parser/regex.lua      | 28 ++++++++++----------
 lua/comment-translate/parser/treesitter.lua | 29 ++++++++++++---------
 lua/comment-translate/translate/google.lua  | 24 ++++++++++-------
 11 files changed, 103 insertions(+), 43 deletions(-)
 create mode 100644 .stylua.toml

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 051c019..4963fca 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,6 +7,20 @@ on:
     branches: [main, master]
 
 jobs:
+  format:
+    name: Format Check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup StyLua
+        uses: JohnnyMorganz/stylua-action@v4
+        with:
+          version: latest
+
+      - name: Check formatting
+        run: make fmt-check
+
   test:
     name: Test
     runs-on: ubuntu-latest
diff --git a/.stylua.toml b/.stylua.toml
new file mode 100644
index 0000000..a2b3447
--- /dev/null
+++ b/.stylua.toml
@@ -0,0 +1,6 @@
+column_width = 100
+line_endings = "Unix"
+indent_type = "Spaces"
+indent_width = 2
+quote_style = "AutoPreferSingle"
+call_parentheses = "Always"
diff --git a/Makefile b/Makefile
index 2c26df8..3f2226a 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-.PHONY: test test-file clean
+.PHONY: test test-file clean fmt fmt-check
 
 # Test runner
 PLENARY_DIR ?= /tmp/plenary.nvim
@@ -31,3 +31,11 @@ docs:
 # Health check
 health:
 	nvim --headless -c "checkhealth comment-translate" -c "qa"
+
+# Format Lua files
+fmt:
+	stylua lua plugin tests
+
+# Check Lua formatting
+fmt-check:
+	stylua --check lua plugin tests
diff --git a/README.md b/README.md
index c2e8748..68f69cf 100644
--- a/README.md
+++ b/README.md
@@ -161,6 +161,22 @@ hover = { auto = false }
 
 ⚠️ Any text you translate (hover, replace, or immersive translation) is sent to the configured external translation service.
 
+## Development
+
+Use [StyLua](https://github.com/JohnnyMorganz/StyLua) for Lua formatting.
+
+* Format all Lua files:
+
+```sh
+make fmt
+```
+
+* Check formatting (used in CI):
+
+```sh
+make fmt-check
+```
+
 ## License
 
 MIT
diff --git a/lua/comment-translate/commands.lua b/lua/comment-translate/commands.lua
index ae450a5..4e51aee 100644
--- a/lua/comment-translate/commands.lua
+++ b/lua/comment-translate/commands.lua
@@ -77,7 +77,7 @@ function M.hover_translate()
     vim.notify('No comment or string found', vim.log.levels.INFO)
     return
   end
-  
+
   translate.translate(text, nil, nil, function(result)
     if result then
       ui.hover.show(result)
diff --git a/lua/comment-translate/config.lua b/lua/comment-translate/config.lua
index ef61e4b..0ec9a2c 100644
--- a/lua/comment-translate/config.lua
+++ b/lua/comment-translate/config.lua
@@ -81,7 +81,10 @@ M.config = vim.deepcopy(default_config)
 local function warn_unknown(prefix, tbl, allowed)
   for key, _ in pairs(tbl) do
     if not allowed[key] then
-      vim.notify(string.format('comment-translate: unknown config key %s.%s', prefix, key), vim.log.levels.WARN)
+      vim.notify(
+        string.format('comment-translate: unknown config key %s.%s', prefix, key),
+        vim.log.levels.WARN
+      )
     end
   end
 end
@@ -126,7 +129,10 @@ local function validate(user_config)
     })
     -- Ensure max_entries is at least 1 to prevent infinite loops
     if user_config.cache.max_entries and user_config.cache.max_entries < 1 then
-      vim.notify('comment-translate: cache.max_entries must be >= 1, defaulting to 1', vim.log.levels.WARN)
+      vim.notify(
+        'comment-translate: cache.max_entries must be >= 1, defaulting to 1',
+        vim.log.levels.WARN
+      )
       user_config.cache.max_entries = 1
     end
   end
diff --git a/lua/comment-translate/init.lua b/lua/comment-translate/init.lua
index ce66c76..42ab5e7 100644
--- a/lua/comment-translate/init.lua
+++ b/lua/comment-translate/init.lua
@@ -22,7 +22,10 @@ local function load_modules()
   end)
 
   if not ok then
-    vim.notify('comment-translate: Failed to load modules - ' .. tostring(err), vim.log.levels.ERROR)
+    vim.notify(
+      'comment-translate: Failed to load modules - ' .. tostring(err),
+      vim.log.levels.ERROR
+    )
     return false
   end
 
diff --git a/lua/comment-translate/parser/init.lua b/lua/comment-translate/parser/init.lua
index d958309..9e1c495 100644
--- a/lua/comment-translate/parser/init.lua
+++ b/lua/comment-translate/parser/init.lua
@@ -71,7 +71,7 @@ function M.get_text_at_cursor(bufnr)
   bufnr = bufnr or vim.api.nvim_get_current_buf()
   local row, col = unpack(vim.api.nvim_win_get_cursor(0))
   row = row - 1
-  
+
   local text, node_type = treesitter.get_text_at_position(bufnr, row, col)
   if text then
     local cleaned = normalize_text(text, node_type)
diff --git a/lua/comment-translate/parser/regex.lua b/lua/comment-translate/parser/regex.lua
index 2e4f211..79ac755 100644
--- a/lua/comment-translate/parser/regex.lua
+++ b/lua/comment-translate/parser/regex.lua
@@ -26,9 +26,9 @@ local string_patterns = {
 
 -- Block comment delimiters: { start_pattern, end_pattern, start_literal, end_literal }
 local block_comment_delimiters = {
-  { '/%*', '%*/', '/*', '*/' },             -- C/C++/Java/JS/etc.
-  { '%-%-+%[%[', '%]%]', '--[[', ']]' },    -- Lua (]]-- or ]] both work)
-  { '<!%-%-', '%-%->', '<!--', '-->' },     -- HTML/XML
+  { '/%*', '%*/', '/*', '*/' }, -- C/C++/Java/JS/etc.
+  { '%-%-+%[%[', '%]%]', '--[[', ']]' }, -- Lua (]]-- or ]] both work)
+  { '<!%-%-', '%-%->', '<!--', '-->' }, -- HTML/XML
 }
 
 ---@param line_text string
@@ -45,7 +45,7 @@ local function check_block_start(line_text)
   for i, delim in ipairs(block_comment_delimiters) do
     local start_pattern = delim[1]
     local end_pattern = delim[2]
-    
+
     local start_pos = line_text:find(start_pattern)
     if start_pos then
       local end_pos = line_text:find(end_pattern, start_pos + 1)
@@ -67,7 +67,7 @@ local function check_block_end(line_text, delimiter_index)
   if not delim then
     return false, nil
   end
-  
+
   local end_pattern = delim[2]
   local end_pos = line_text:find(end_pattern)
   if end_pos then
@@ -88,18 +88,18 @@ function M.get_all_comments(bufnr)
   local comments = {}
   local line_count = vim.api.nvim_buf_line_count(bufnr)
   local lines = vim.api.nvim_buf_get_lines(bufnr, 0, line_count, false)
-  
+
   local in_block = false
   local block_delimiter_index = nil
   local block_start_line = nil
   local block_content_lines = {}
-  
+
   for line_idx = 0, line_count - 1 do
     local line_text = lines[line_idx + 1]
     if not line_text then
       goto continue
     end
-    
+
     if in_block then
       local is_end, content_before_end = check_block_end(line_text, block_delimiter_index)
       if is_end then
@@ -139,7 +139,7 @@ function M.get_all_comments(bufnr)
             break
           end
         end
-        
+
         if not comment then
           for _, pattern in ipairs(inline_comment_patterns) do
             comment = line_text:match(pattern)
@@ -148,16 +148,16 @@ function M.get_all_comments(bufnr)
             end
           end
         end
-        
+
         if comment then
           comments[line_idx] = comment
         end
       end
     end
-    
+
     ::continue::
   end
-  
+
   return comments
 end
 
@@ -199,7 +199,7 @@ function M.get_string_at_position(bufnr, line, col)
   if not config.config.targets.string then
     return nil
   end
-  
+
   local line_text = vim.api.nvim_buf_get_lines(bufnr, line, line + 1, false)[1]
   if not line_text then
     return nil
@@ -222,7 +222,7 @@ function M.get_string_at_position(bufnr, line, col)
       search_start = e + 1
     end
   end
-  
+
   return nil
 end
 
diff --git a/lua/comment-translate/parser/treesitter.lua b/lua/comment-translate/parser/treesitter.lua
index f0d03de..5c06079 100644
--- a/lua/comment-translate/parser/treesitter.lua
+++ b/lua/comment-translate/parser/treesitter.lua
@@ -22,7 +22,6 @@ local string_node_types = {
 ---@param col number
 ---@return string?, string?
 function M.get_text_at_position(bufnr, row, col)
-
   local ok, parser = pcall(vim.treesitter.get_parser, bufnr)
   if not ok or not parser then
     return nil, nil
@@ -72,8 +71,10 @@ function M.get_text_at_position(bufnr, row, col)
           break
         end
       end
-      if is_comment then break end
-      
+      if is_comment then
+        break
+      end
+
       for _, type_name in ipairs(string_node_types) do
         if parent_type == type_name then
           is_string = true
@@ -81,7 +82,9 @@ function M.get_text_at_position(bufnr, row, col)
           break
         end
       end
-      if is_string then break end
+      if is_string then
+        break
+      end
 
       parent = parent:parent()
     end
@@ -110,24 +113,24 @@ function M.get_all_comments(bufnr)
   if not config.config.targets.comment then
     return {}
   end
-  
+
   local comments = {}
-  
+
   local ok, parser = pcall(vim.treesitter.get_parser, bufnr)
   if not ok or not parser then
     return {}
   end
-  
+
   local tree = parser:parse()[1]
   if not tree then
     return {}
   end
-  
+
   local root = tree:root()
-  
+
   local function traverse(node)
     local node_type = node:type()
-    
+
     for _, type_name in ipairs(comment_node_types) do
       if node_type == type_name then
         local text = vim.treesitter.get_node_text(node, bufnr)
@@ -138,14 +141,14 @@ function M.get_all_comments(bufnr)
         return
       end
     end
-    
+
     for child in node:iter_children() do
       traverse(child)
     end
   end
-  
+
   traverse(root)
-  
+
   return comments
 end
 
diff --git a/lua/comment-translate/translate/google.lua b/lua/comment-translate/translate/google.lua
index 4a2b35c..595e89a 100644
--- a/lua/comment-translate/translate/google.lua
+++ b/lua/comment-translate/translate/google.lua
@@ -64,16 +64,19 @@ function M.translate(text, target_lang, source_lang, callback)
   local ok, Job = get_plenary_job()
   if not ok then
     vim.schedule(function()
-      vim.notify('comment-translate: plenary.nvim is required for translation', vim.log.levels.ERROR)
+      vim.notify(
+        'comment-translate: plenary.nvim is required for translation',
+        vim.log.levels.ERROR
+      )
       callback(nil)
     end)
     return
   end
-  
+
   source_lang = source_lang or 'auto'
   target_lang = utils.normalize_lang_code(target_lang)
   source_lang = utils.normalize_lang_code(source_lang)
-  
+
   local encoded_text = utils.url_encode(text)
   local url = string.format(
     'https://translate.googleapis.com/translate_a/single?client=gtx&sl=%s&tl=%s&dt=t&q=%s',
@@ -81,7 +84,7 @@ function M.translate(text, target_lang, source_lang, callback)
     target_lang,
     encoded_text
   )
-  
+
   local stderr_output = {}
 
   Job:new({
@@ -90,7 +93,8 @@ function M.translate(text, target_lang, source_lang, callback)
       '--silent',
       '--show-error',
       '--fail',
-      '--max-time', '10',
+      '--max-time',
+      '10',
       url,
     },
     on_stderr = function(_, data)
@@ -109,20 +113,20 @@ function M.translate(text, target_lang, source_lang, callback)
           callback(nil)
           return
         end
-        
+
         local result = table.concat(j:result(), '')
         if not result or result == '' then
           callback(nil)
           return
         end
-        
+
         local parse_ok, json = pcall(vim.fn.json_decode, result)
         if not parse_ok or not json then
           vim.notify('comment-translate: Failed to parse translation response', vim.log.levels.WARN)
           callback(nil)
           return
         end
-        
+
         local translated_text = ''
         if json[1] and type(json[1]) == 'table' then
           for _, item in ipairs(json[1]) do
@@ -131,12 +135,12 @@ function M.translate(text, target_lang, source_lang, callback)
             end
           end
         end
-        
+
         if translated_text == '' then
           callback(nil)
           return
         end
-        
+
         cache.set(text, translated_text, target_lang, source_lang)
         callback(translated_text)
       end)

From b98f5d3494c697c963bb49adc777f9e890e6743c Mon Sep 17 00:00:00 2001
From: noir4y <210010039+noir4y@users.noreply.github.com>
Date: Sun, 8 Feb 2026 15:05:33 +0900
Subject: [PATCH 2/2] fix: pass github token to stylua-action to avoid auth
 error

---
 .github/workflows/ci.yml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4963fca..0204588 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,6 +17,8 @@ jobs:
         uses: JohnnyMorganz/stylua-action@v4
         with:
           version: latest
+          token: ${{ github.token }}
+          args: false
 
       - name: Check formatting
         run: make fmt-check