132 lines
4.0 KiB
Lua
132 lines
4.0 KiB
Lua
local M = {}
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local require = require('lualine_require').require
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local utils = require('lualine.utils.utils')
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-- vars
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local current_git_branch = ''
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local current_git_dir = ''
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local branch_cache = {} -- stores last known branch for a buffer
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local active_bufnr = '0'
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-- os specific path separator
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local sep = package.config:sub(1, 1)
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-- event watcher to watch head file
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-- Use file watch for non Windows and poll for Windows.
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-- Windows doesn't like file watch for some reason.
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local file_changed = sep ~= '\\' and vim.loop.new_fs_event() or vim.loop.new_fs_poll()
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local git_dir_cache = {} -- Stores git paths that we already know of
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---sets git_branch variable to branch name or commit hash if not on branch
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---@param head_file string full path of .git/HEAD file
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local function get_git_head(head_file)
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local f_head = io.open(head_file)
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if f_head then
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local HEAD = f_head:read()
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f_head:close()
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local branch = HEAD:match('ref: refs/heads/(.+)$')
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if branch then
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current_git_branch = branch
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else
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current_git_branch = HEAD:sub(1, 6)
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end
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end
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return nil
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end
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---updates the current value of git_branch and sets up file watch on HEAD file
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local function update_branch()
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active_bufnr = tostring(vim.fn.bufnr())
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file_changed:stop()
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local git_dir = current_git_dir
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if git_dir and #git_dir > 0 then
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local head_file = git_dir .. sep .. 'HEAD'
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get_git_head(head_file)
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file_changed:start(
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head_file,
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sep ~= '\\' and {} or 1000,
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vim.schedule_wrap(function()
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-- reset file-watch
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update_branch()
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end)
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)
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else
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-- set to '' when git dir was not found
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current_git_branch = ''
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end
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branch_cache[vim.fn.bufnr()] = current_git_branch
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end
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---returns full path to git directory for dir_path or current directory
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---@param dir_path string|nil
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---@return string
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function M.find_git_dir(dir_path)
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-- get file dir so we can search from that dir
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local file_dir = dir_path or vim.fn.expand('%:p:h')
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local root_dir = file_dir
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local git_dir
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-- Search upward for .git file or folder
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while root_dir do
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if git_dir_cache[root_dir] then
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git_dir = git_dir_cache[root_dir]
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break
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end
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local git_path = root_dir .. sep .. '.git'
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local git_file_stat = vim.loop.fs_stat(git_path)
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if git_file_stat then
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if git_file_stat.type == 'directory' then
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git_dir = git_path
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elseif git_file_stat.type == 'file' then
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-- separate git-dir or submodule is used
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local file = io.open(git_path)
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if file then
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git_dir = file:read()
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git_dir = git_dir and git_dir:match('gitdir: (.+)$')
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file:close()
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end
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-- submodule / relative file path
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if git_dir and git_dir:sub(1, 1) ~= sep and not git_dir:match('^%a:.*$') then
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git_dir = git_path:match('(.*).git') .. git_dir
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end
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end
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if git_dir then
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local head_file_stat = vim.loop.fs_stat(git_dir .. sep .. 'HEAD')
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if head_file_stat and head_file_stat.type == 'file' then
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break
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else
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git_dir = nil
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end
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end
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end
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root_dir = root_dir:match('(.*)' .. sep .. '.-')
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end
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git_dir_cache[file_dir] = git_dir
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if dir_path == nil and current_git_dir ~= git_dir then
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current_git_dir = git_dir
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update_branch()
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end
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return git_dir
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end
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---initializes git_branch module
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function M.init()
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-- run watch head on load so branch is present when component is loaded
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M.find_git_dir()
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-- update branch state of BufEnter as different Buffer may be on different repos
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utils.define_autocmd('BufEnter', "lua require'lualine.components.branch.git_branch'.find_git_dir()")
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end
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function M.get_branch(bufnr)
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if vim.g.actual_curbuf ~= nil and active_bufnr ~= vim.g.actual_curbuf then
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-- Workaround for https://github.com/nvim-lualine/lualine.nvim/issues/286
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-- See upstream issue https://github.com/neovim/neovim/issues/15300
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-- Diff is out of sync re sync it.
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M.find_git_dir()
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end
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if bufnr then
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return branch_cache[bufnr] or ''
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end
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return current_git_branch
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end
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return M
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