refactor(gitcommit): improve git log job readability and structure

- reformat Job:new to use method chaining for better clarity
- adjust indentation and formatting for nested callbacks
- enhance error handling and scheduling logic
- maintain existing functionality while improving code maintainability

Author: jinzhongjia

lua/codecompanion/_extensions/gitcommit/init.lua

@@ -146,69 +146,87 @@ return {
 
           -- 获取最近N条commit，数量可配置
           local Job = require("plenary.job")
-          Job:new({
-            command = "git",
-            args = { "log", "--oneline", "-n", tostring(gitcommit_select_count) },
-            on_exit = function(j, return_val)
-              if return_val ~= 0 then
-                vim.schedule(function()
-                  chat:add_reference({ role = "user", content = "Error: Failed to get git log" }, "git", "<git_error>")
-                end)
-                return
-              end
-              local output = j:result()
-              if not output or #output == 0 then
-                vim.schedule(function()
-                  chat:add_reference({ role = "user", content = "No commits found." }, "git", "<git_error>")
-                end)
-                return
-              end
-              -- 解析commit hash和message
-              local items = {}
-              for _, line in ipairs(output) do
-                local hash, msg = line:match("^(%w+)%s(.+)$")
-                if hash and msg then
-                  table.insert(items, { label = hash .. " " .. msg, hash = hash })
+          Job
+            :new({
+              command = "git",
+              args = { "log", "--oneline", "-n", tostring(gitcommit_select_count) },
+              on_exit = function(j, return_val)
+                if return_val ~= 0 then
+                  vim.schedule(function()
+                    chat:add_reference(
+                      { role = "user", content = "Error: Failed to get git log" },
+                      "git",
+                      "<git_error>"
+                    )
+                  end)
+                  return
                 end
-              end
-              if #items == 0 then
-                vim.schedule(function()
-                  chat:add_reference({ role = "user", content = "No commits found." }, "git", "<git_error>")
-                end)
-                return
-              end
-              vim.schedule(function()
-                vim.ui.select(items, {
-                  prompt = "Select a commit to insert:",
-                  format_item = function(item) return item.label end,
-                }, function(choice)
-                  if not choice then
-                    return
+                local output = j:result()
+                if not output or #output == 0 then
+                  vim.schedule(function()
+                    chat:add_reference({ role = "user", content = "No commits found." }, "git", "<git_error>")
+                  end)
+                  return
+                end
+                -- 解析commit hash和message
+                local items = {}
+                for _, line in ipairs(output) do
+                  local hash, msg = line:match("^(%w+)%s(.+)$")
+                  if hash and msg then
+                    table.insert(items, { label = hash .. " " .. msg, hash = hash })
                   end
-                  -- 获取完整commit内容
-                  Job:new({
-                    command = "git",
-                    args = { "show", choice.hash },
-                    on_exit = function(j2, rv2)
-                      local commit_content = table.concat(j2:result(), "\n")
-                      if rv2 ~= 0 or not commit_content or commit_content == "" then
-                        vim.schedule(function()
-                          chat:add_reference({ role = "user", content = "Error: Failed to get commit content." }, "git", "<git_error>")
-                        end)
-                        return
-                      end
-                      vim.schedule(function()
-                        chat:add_reference({
-                          role = "user",
-                          content = "Selected commit (" .. choice.hash .. ") full content:\n```\n" .. commit_content .. "\n```",
-                        }, "git", "<git_commit>")
-                      end)
+                end
+                if #items == 0 then
+                  vim.schedule(function()
+                    chat:add_reference({ role = "user", content = "No commits found." }, "git", "<git_error>")
+                  end)
+                  return
+                end
+                vim.schedule(function()
+                  vim.ui.select(items, {
+                    prompt = "Select a commit to insert:",
+                    format_item = function(item)
+                      return item.label
                     end,
-                  }):start()
+                  }, function(choice)
+                    if not choice then
+                      return
+                    end
+                    -- 获取完整commit内容
+                    Job
+                      :new({
+                        command = "git",
+                        args = { "show", choice.hash },
+                        on_exit = function(j2, rv2)
+                          local commit_content = table.concat(j2:result(), "\n")
+                          if rv2 ~= 0 or not commit_content or commit_content == "" then
+                            vim.schedule(function()
+                              chat:add_reference(
+                                { role = "user", content = "Error: Failed to get commit content." },
+                                "git",
+                                "<git_error>"
+                              )
+                            end)
+                            return
+                          end
+                          vim.schedule(function()
+                            chat:add_reference({
+                              role = "user",
+                              content = "Selected commit ("
+                                .. choice.hash
+                                .. ") full content:\n```\n"
+                                .. commit_content
+                                .. "\n```",
+                            }, "git", "<git_commit>")
+                          end)
+                        end,
+                      })
+                      :start()
+                  end)
                 end)
-              end)
-            end,
-          }):start()
+              end,
+            })
+            :start()
         end,
         opts = {
           contains_code = true,