refactor(format): enable format function

bundle/format.nvim/lua/format.lua

@@ -24,11 +24,19 @@ function M.format(bang, user_input, start_line, end_line)
   end
 
   if not formatter then
-    ok, formatter = pcall(require, 'format.ft.' .. filetype)
+    ok = pcall(function()
+      local default = require('format.ft.' .. filetype)
+      local formatname = default.enabled()[1]
+      formatter = default[formatname]({
+        filepath = vim.fn.expand('%:p'),
+        start_line = start_line,
+        end_line = end_line,
+      })
+      util.info('using default formatter:' .. formatname)
+    end)
     if not ok then
       return util.msg('no formatter for ' .. filetype)
     end
-    util.info('using default formatter:' .. formatter.exe)
   end
 
   task.run({

bundle/format.nvim/lua/format/ft/json.lua

@@ -0,0 +1,15 @@
+local M = {}
+
+function M.enabled()
+  return {'prettier'}
+end
+
+function M.prettier(opt)
+    return {
+        exe = 'prettier',
+        args = {'--stdin-filepath', opt.filepath},
+        stdin = true,
+        }
+end
+
+return M

bundle/format.nvim/lua/format/ft/lua.lua

@@ -1,5 +1,15 @@
-return {
-  exe = 'stylua',
-  args = {'-'},
-  stdin = true
-}
+local M = {}
+
+function M.enabled()
+  return { 'stylua' }
+end
+
+function M.stylua(opt)
+  return {
+    exe = 'stylua',
+    args = { '-' },
+    stdin = true,
+  }
+end
+
+return M

bundle/format.nvim/lua/format/ft/markdown.lua

@@ -1,8 +1,16 @@
-if vim.fn.executable('prettier') == 1 then
+local M = {}
+
+function M.enabled()
+  return { 'prettier' }
+end
+
+function M.prettier(opt)
   return {
     exe = vim.fn.exepath('prettier'),
     name = 'prettier',
-    args = {'--stdin-filepath', 't.md'},
+    args = {'--stdin-filepath', opt.filepath},
     stdin = true
   }
 end
+
+return M

bundle/format.nvim/plugin/format.lua

@@ -4,5 +4,16 @@ end, {
   nargs = '*',
   range = '%',
   bang = true,
-  bar = true
+  bar = true,
+  complete = function(_, line)
+    local ft = vim.o.filetype
+    local l = vim.split(line, '%s+')
+    local ok, default = pcall(require, 'format.ft.' .. ft)
+    if ok then
+      return vim.tbl_filter(function(val)
+        return vim.startswith(val, l[#l])
+      end, default.enabled())
+    else
+    end
+  end,
 })