feat/chore: rewrite git with job and some other fixes (#743)

* feat/chore: rewrite git with job and some other fixes

* fix: fs clear window, rename echo_warning -> warn

also fix renaming and add an event blocker to avoid running many events
at the same time

lua/nvim-tree/git/init.lua

@@ -0,0 +1,86 @@
+local git_utils = require'nvim-tree.git.utils'
+local Runner = require'nvim-tree.git.runner'
+
+local M = {
+  config = nil,
+  projects = {},
+  cwd_to_project_root = {}
+}
+
+function M.reload(callback)
+  local num_projects = vim.tbl_count(M.projects)
+  if not M.config.enable or num_projects == 0 then
+    return callback({})
+  end
+
+  local done = 0
+  for project_root in pairs(M.projects) do
+    M.projects[project_root] = {}
+    Runner.run {
+      project_root = project_root,
+      list_untracked = git_utils.should_show_untracked(project_root),
+      list_ignored = M.config.ignore,
+      timeout = M.config.timeout,
+      on_end = function(git_status)
+        M.projects[project_root] = {
+          files = git_status,
+          dirs = git_utils.file_status_to_dir_status(git_status, project_root)
+        }
+        done = done + 1
+        if done == num_projects then
+          callback(M.projects)
+        end
+      end
+    }
+  end
+end
+
+function M.get_project_root(cwd)
+  if M.cwd_to_project_root[cwd] then
+    return M.cwd_to_project_root[cwd]
+  end
+
+  if M.cwd_to_project_root[cwd] == false then
+    return nil
+  end
+
+  local project_root = git_utils.get_toplevel(cwd)
+  return project_root
+end
+
+function M.load_project_status(cwd, callback)
+  if not M.config.enable then
+    return callback({})
+  end
+
+  local project_root = M.get_project_root(cwd)
+  if not project_root then
+    M.cwd_to_project_root[cwd] = false
+    return callback({})
+  end
+
+  local status = M.projects[project_root]
+  if status then
+    return callback(status)
+  end
+
+  Runner.run {
+    project_root = project_root,
+    list_untracked = git_utils.should_show_untracked(project_root),
+    list_ignored = M.config.ignore,
+    timeout = M.config.timeout,
+    on_end = function(git_status)
+      M.projects[project_root] = {
+        files = git_status,
+        dirs = git_utils.file_status_to_dir_status(git_status, project_root)
+      }
+      callback(M.projects[project_root])
+    end
+  }
+end
+
+function M.setup(opts)
+  M.config = opts.git
+end
+
+return M