feat: Allow current buffer commits to show on the already worked out Git root (#148)

We have already worked out the "git root" for the current buffer, we did
this to work out the relative path. We might as well use this
information when calling `lazygitfilter`.

This now allows `lazygitfiltercurrentfile` to work, whether your actual
cwd is a git repository ('normal' workflow) or a project folder
containing many repositories (another workflow many vim users follow).

It looks like LSP did an autoformat on the file also, I can revert those
two lines if required.

lua/lazygit.lua

@@ -75,8 +75,8 @@ local function lazygitgetconfigpath()
     else
       print(
         "lazygit: custom config file path: '"
-          .. vim.g.lazygit_config_file_path
-          .. "' could not be found. Returning default config"
+        .. vim.g.lazygit_config_file_path
+        .. "' could not be found. Returning default config"
       )
       return default_config_path
     end
@@ -108,7 +108,7 @@ local function lazygitlog(path)
     if type(config_path) == "table" then
       config_path = table.concat(config_path, ",")
     end
-    cmd = cmd .. " -ucf '" .. config_path .. "'" -- quote config_path to avoid whitespace errors
+    cmd = cmd .. ' -ucf "' .. config_path .. '"' -- quote config_path to avoid whitespace errors
   end
 
   if vim.env.GIT_DIR ~= nil and vim.env.GIT_WORK_TREE ~= nil then
@@ -147,7 +147,7 @@ local function lazygit(path)
     if type(config_path) == "table" then
       config_path = table.concat(config_path, ",")
     end
-    cmd = cmd .. " -ucf '" .. config_path .. "'" -- quote config_path to avoid whitespace errors
+    cmd = cmd .. ' -ucf "' .. config_path .. '"' -- quote config_path to avoid whitespace errors
   end
 
   if vim.env.GIT_DIR ~= nil and vim.env.GIT_WORK_TREE ~= nil then
@@ -173,7 +173,7 @@ local function lazygitcurrentfile()
 end
 
 --- :LazyGitFilter entry point
-local function lazygitfilter(path)
+local function lazygitfilter(path, git_root)
   if is_lazygit_available() ~= true then
     print("Please install lazygit. Check documentation for more information")
     return
@@ -183,7 +183,11 @@ local function lazygitfilter(path)
   end
   prev_win = vim.api.nvim_get_current_win()
   win, buffer = open_floating_window()
-  local cmd = "lazygit " .. "-f " .. "'" .. path .. "'"
+
+  local cmd = "lazygit " .. '-f "' .. path .. '"'
+  if git_root then
+    cmd = cmd .. ' -p "' .. git_root .. '"'
+  end
   exec_lazygit_command(cmd)
 end
 
@@ -193,7 +197,7 @@ local function lazygitfiltercurrentfile()
   local git_root = get_root(current_dir)
   local file_path = vim.fn.expand("%:p")
   local relative_path = string.sub(file_path, #git_root + 2)
-  lazygitfilter(relative_path)
+  lazygitfilter(relative_path, git_root)
 end
 
 --- :LazyGitConfig entry point