MiniFiles Git integration

_Notes.md

Below is a code for Minifiles Git integration code snippet.

How to use it

Just insert the code below into this function in your Minifiles config:

config = function()
-- add the git code here
end

Screenshot:

Some Notes:

• It requires the latest version of mini.files.
• it requires neovim v0.10.0 or later, for previous versions please check the revison of this gist for function(fetchGitStatus) specifically.
• it works on mac, linux or windows.
• The shell command git status is executed once per Minifiles session for performance reasons, leveraging simple cache integration.
• the code is efficient and shell command executes asyncronously for performance optimization.
• You have the option to change symbols and highlight groups to GitSigns if preferred. Currently, it's using Mini.Diff.
• If you prefer symbols on the right, they're commented out. Refer to the NOTE in the code.

TODOs and some limitation:

• Git ignore support isn't implemented yet, but it's feasible and might be added in the future.
• It doesn't check for Git outside of the current working directory (cwd) due to caching considerations. This might be revisited in the future.
• currently, it doesn't work if preview was on
• The code will be simpler and more efficient when this issue echasnovski/mini.nvim#817 is resolved.
  • thanks to @echasnovski!

NOTE:

• I'm open to feedback, suggestions, or even criticism.
• If you have a better idea for implementation, please share!

Thanks:

• @echasnovski
• oil-git-status.nvim for directories integrations

minifiles.lua

local nsMiniFiles = vim.api.nvim_create_namespace("mini_files_git")
local autocmd = vim.api.nvim_create_autocmd
local _, MiniFiles = pcall(require, "mini.files")

-- Cache for git status
local gitStatusCache = {}
local cacheTimeout = 2000 -- Cache timeout in milliseconds

local function mapSymbols(status)
  local statusMap = {
  -- stylua: ignore start 
  [" M"] = { symbol = "•", hlGroup  = "MiniDiffSignChange"}, -- Modified in the working directory
  ["M "] = { symbol = "✹", hlGroup  = "MiniDiffSignChange"}, -- modified in index
  ["MM"] = { symbol = "≠", hlGroup  = "MiniDiffSignChange"}, -- modified in both working tree and index
  ["A "] = { symbol = "+", hlGroup  = "MiniDiffSignAdd"   }, -- Added to the staging area, new file
  ["AA"] = { symbol = "≈", hlGroup  = "MiniDiffSignAdd"   }, -- file is added in both working tree and index
  ["D "] = { symbol = "-", hlGroup  = "MiniDiffSignDelete"}, -- Deleted from the staging area
  ["AM"] = { symbol = "⊕", hlGroup  = "MiniDiffSignChange"}, -- added in working tree, modified in index
  ["AD"] = { symbol = "-•", hlGroup = "MiniDiffSignChange"}, -- Added in the index and deleted in the working directory
  ["R "] = { symbol = "→", hlGroup  = "MiniDiffSignChange"}, -- Renamed in the index
  ["U "] = { symbol = "‖", hlGroup  = "MiniDiffSignChange"}, -- Unmerged path
  ["UU"] = { symbol = "⇄", hlGroup  = "MiniDiffSignAdd"   }, -- file is unmerged
  ["UA"] = { symbol = "⊕", hlGroup  = "MiniDiffSignAdd"   }, -- file is unmerged and added in working tree
  ["??"] = { symbol = "?", hlGroup  = "MiniDiffSignDelete"}, -- Untracked files
  ["!!"] = { symbol = "!", hlGroup  = "MiniDiffSignChange"}, -- Ignored files
  -- stylua: ignore end
  }

  local result = statusMap[status]
    or { symbol = "?", hlGroup = "NonText" }
  return result.symbol, result.hlGroup
end

---@param cwd string
---@param callback function
local function fetchGitStatus(cwd, callback)
  local function on_exit(content)
    if content.code == 0 then
      callback(content.stdout)
      vim.g.content = content.stdout
    end
  end
  vim.system(
    { "git", "status", "--ignored", "--porcelain" },
    { text = true, cwd = cwd },
    on_exit
  )
end

local function escapePattern(str)
  return str:gsub("([%^%$%(%)%%%.%[%]%*%+%-%?])", "%%%1")
end

local function updateMiniWithGit(buf_id, gitStatusMap)
  vim.schedule(function()
    local nlines = vim.api.nvim_buf_line_count(buf_id)
    local cwd = vim.fn.getcwd() --  vim.fn.expand("%:p:h")
    local escapedcwd = escapePattern(cwd)
    if vim.fn.has("win32") == 1 then
	escapedcwd = escapedcwd:gsub("\\", "/")
    end

    for i = 1, nlines do
      local entry = MiniFiles.get_fs_entry(buf_id, i)
      if not entry then
	break
      end
      local relativePath = entry.path:gsub("^" .. escapedcwd .. "/", "")
      local status = gitStatusMap[relativePath]

      if status then
        local symbol, hlGroup = mapSymbols(status)
        vim.api.nvim_buf_set_extmark(buf_id, nsMiniFiles, i - 1, 0, {
          -- NOTE: if you want the signs on the right uncomment those and comment
          -- the 3 lines after
          -- virt_text = { { symbol, hlGroup } },
          -- virt_text_pos = "right_align",
          sign_text = symbol,
          sign_hl_group = hlGroup,
          priority = 2,
        })
      else
      end
    end
  end)
end


local function is_valid_git_repo()
  if vim.fn.isdirectory(".git") == 0 then
    return false
  end
  return true
end

-- Thanks for the idea of gettings https://github.com/refractalize/oil-git-status.nvim signs for dirs
local function parseGitStatus(content)
  local gitStatusMap = {}
  -- lua match is faster than vim.split (in my experience )
  for line in content:gmatch("[^\r\n]+") do
    local status, filePath = string.match(line, "^(..)%s+(.*)")
    -- Split the file path into parts
    local parts = {}
    for part in filePath:gmatch("[^/]+") do
      table.insert(parts, part)
    end
    -- Start with the root directory
    local currentKey = ""
    for i, part in ipairs(parts) do
      if i > 1 then
        -- Concatenate parts with a separator to create a unique key
        currentKey = currentKey .. "/" .. part
      else
        currentKey = part
      end
      -- If it's the last part, it's a file, so add it with its status
      if i == #parts then
        gitStatusMap[currentKey] = status
      else
        -- If it's not the last part, it's a directory. Check if it exists, if not, add it.
        if not gitStatusMap[currentKey] then
          gitStatusMap[currentKey] = status
        end
      end
    end
  end
  return gitStatusMap
end

local function updateGitStatus(buf_id)
  if not is_valid_git_repo() then
    return
  end
  local cwd = vim.fn.expand("%:p:h")
  local currentTime = os.time()
  if
    gitStatusCache[cwd]
    and currentTime - gitStatusCache[cwd].time < cacheTimeout
  then
    updateMiniWithGit(buf_id, gitStatusCache[cwd].statusMap)
  else
    fetchGitStatus(cwd, function(content)
      local gitStatusMap = parseGitStatus(content)
      gitStatusCache[cwd] = {
        time = currentTime,
        statusMap = gitStatusMap,
      }
      updateMiniWithGit(buf_id, gitStatusMap)
    end)
  end
end

local function clearCache()
  gitStatusCache = {}
end

local function augroup(name)
  return vim.api.nvim_create_augroup(
    "MiniFiles_" .. name,
    { clear = true }
  )
end

autocmd("User", {
  group = augroup("start"),
  pattern = "MiniFilesExplorerOpen",
  -- pattern = { "minifiles" },
  callback = function()
    local bufnr = vim.api.nvim_get_current_buf()
    updateGitStatus(bufnr)
  end,
})

autocmd("User", {
  group = augroup("close"),
  pattern = "MiniFilesExplorerClose",
  callback = function()
    clearCache()
  end,
})

autocmd("User", {
  group = augroup("update"),
  pattern = "MiniFilesBufferUpdate",
  callback = function(sii)
    local bufnr = sii.data.buf_id
    local cwd = vim.fn.expand("%:p:h")
    if gitStatusCache[cwd] then
      updateMiniWithGit(bufnr, gitStatusCache[cwd].statusMap)
    end
  end,
})

Thanks for this, its something I've been missing. Some updates that I made to suite my usecase - I often work in large repos and then my cwd != git root, but I would still like to see the git status in this case, so just tweaking updateMiniWithGit and updateGitStatus as follows, solved this:

local function updateMiniWithGit(buf_id, gitStatusMap)
	local MiniFiles = require("mini.files")
	vim.schedule(function()
		local nlines = vim.api.nvim_buf_line_count(buf_id)
		local git_root = vim.trim(vim.fn.system("git rev-parse --show-toplevel"))
		local escapedcwd = escapePattern(git_root)
		if vim.fn.has("win32") == 1 then
			escapedcwd = escapedcwd:gsub("\\", "/")
		end

		for i = 1, nlines do
			local entry = MiniFiles.get_fs_entry(buf_id, i)
			if not entry then
				break
			end
			local relativePath = entry.path:gsub("^" .. escapedcwd .. "/", "")
			local status = gitStatusMap[relativePath]

			if status then
				local symbol, hlGroup = mapSymbols(status)
				vim.api.nvim_buf_set_extmark(buf_id, nsMiniFiles, i - 1, 0, {
					-- NOTE: if you want the signs on the right uncomment those and comment
					-- the 3 lines after
					-- virt_text = { { symbol, hlGroup } },
					-- virt_text_pos = "right_align",
					sign_text = symbol,
					sign_hl_group = hlGroup,
					priority = 2,
				})
			else
			end
		end
	end)
end

local function updateGitStatus(buf_id)
	if vim.fn.system("git rev-parse --show-toplevel 2> /dev/null") == "" then
		vim.notify("Not a valid git repo")
		return
	end
	local cwd = vim.fn.expand("%:p:h")
	local currentTime = os.time()
	if gitStatusCache[cwd] and currentTime - gitStatusCache[cwd].time < cacheTimeout then
		updateMiniWithGit(buf_id, gitStatusCache[cwd].statusMap)
	else
		fetchGitStatus(cwd, function(content)
			local gitStatusMap = parseGitStatus(content)
			gitStatusCache[cwd] = {
				time = currentTime,
				statusMap = gitStatusMap,
			}
			updateMiniWithGit(buf_id, gitStatusMap)
		end)
	end
end

Thanks @WizardStark
That's a good point, and I considered it when I implemented it. However, I opted for my solution because I thought most people wouldn't start Neovim from a subdirectory inside a Git repo. But I understand that people have different use cases.

One suggestion, if you're using Neovim nightly, is to utilize the Neovim official API instead of directly calling Git.
For instance, instead of:

local git_root = vim.trim(vim.fn.system("git rev-parse --show-toplevel")) 

You can use:

local root_dir = vim.fs.root(vim.uv.cwd(), ".git")

Similarly, instead of:

if vim.fn.system("git rev-parse --show-toplevel 2> /dev/null") == "" then

You can use:

if not vim.fs.root(vim.uv.cwd(), ".git") then