refactor(git): make the git module self-contained under git.util

lua/git/repo.lua

@@ -1,5 +1,4 @@
-local log = require("log")
-local util = require("util")
+local util = require("git.util")
 
 local M = {}
 
@@ -76,7 +75,7 @@ function M.resolve(path)
     f:close()
     local gitdir = content:match("gitdir:%s*(%S+)")
     if not gitdir then
-        log.warning(".git file at %s has no `gitdir:` line", found)
+        util.warning(".git file at %s has no `gitdir:` line", found)
         return nil
     end
     if not gitdir:match("^/") then
@@ -104,7 +103,7 @@ end
 ---@field buffers table<integer, true>  set of registered buffer numbers
 ---@field watcher? uv.uv_fs_event_t
 ---@field refresh fun(self: ow.Git.Repo)
----@field refresh_handle ow.Util.DebounceHandle
+---@field refresh_handle ow.Git.Util.DebounceHandle
 local Repo = {}
 Repo.__index = Repo
 
@@ -188,7 +187,10 @@ local function do_refresh(repo)
                     end
                 end
             else
-                log.warning("git status failed: %s", vim.trim(obj.stderr or ""))
+                util.warning(
+                    "git status failed: %s",
+                    vim.trim(obj.stderr or "")
+                )
             end
             local dirty = false
             for buf in pairs(repo.buffers) do
@@ -336,7 +338,7 @@ function M.rev_parse(worktree, ref, short)
         table.insert(cmd, "--short")
     end
     table.insert(cmd, ref)
-    local stdout = util.system_sync(cmd, { cwd = worktree, silent = true })
+    local stdout = util.exec(cmd, { cwd = worktree, silent = true })
     local trimmed = stdout and vim.trim(stdout) or ""
     return trimmed ~= "" and trimmed or nil
 end