132 lines
3.9 KiB
Lua
132 lines
3.9 KiB
Lua
-- Copyright (c) 2020-2021 shadmansaleh
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-- MIT license, see LICENSE for more details.
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local M = require('lualine.component'):extend()
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local modules = require('lualine_require').lazy_require {
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utils = 'lualine.utils.utils',
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}
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-- vars
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M.git_branch = ''
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M.git_dir = ''
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-- os specific path separator
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M.sep = package.config:sub(1, 1)
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-- event watcher to watch head file
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-- Use file wstch for non windows and poll for windows.
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-- windows doesn't like file watch for some reason.
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M.file_changed = M.sep ~= '\\' and vim.loop.new_fs_event() or vim.loop.new_fs_poll()
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M.active_bufnr = '0'
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local branch_cache = {} -- stores last known branch for a buffer
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-- Initilizer
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M.init = function(self, options)
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M.super.init(self, options)
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if not self.options.icon then
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self.options.icon = '' -- e0a0
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end
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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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modules.utils.define_autocmd('BufEnter', "lua require'lualine.components.branch'.find_git_dir()")
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end
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M.update_status = function(_, is_focused)
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if M.active_bufnr ~= vim.g.actual_curbuf then
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-- Workaround for https://github.com/hoob3rt/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 not is_focused then
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return branch_cache[vim.fn.bufnr()] or ''
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end
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return M.git_branch
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end
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local git_dir_cache = {} -- Stores git paths that we already know of
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-- returns full path to git directory for current directory
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function M.find_git_dir()
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-- get file dir so we can search from that dir
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local file_dir = 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 .. M.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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git_dir = file:read()
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git_dir = git_dir:match 'gitdir: (.+)$'
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file:close()
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-- submodule / relative file path
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if git_dir and git_dir:sub(1, 1) ~= M.sep and not git_dir:match '^%a:.*$' 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 .. M.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('(.*)' .. M.sep .. '.-')
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end
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git_dir_cache[file_dir] = git_dir
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if M.git_dir ~= git_dir then
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M.git_dir = git_dir
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M.update_branch()
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end
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return git_dir
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end
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-- sets git_branch veriable to branch name or commit hash if not on branch
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function M.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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M.git_branch = branch
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else
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M.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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-- Update branch
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function M.update_branch()
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M.active_bufnr = tostring(vim.fn.bufnr())
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M.file_changed:stop()
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local git_dir = M.git_dir
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if git_dir and #git_dir > 0 then
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local head_file = git_dir .. M.sep .. 'HEAD'
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M.get_git_head(head_file)
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M.file_changed:start(
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head_file,
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M.sep ~= '\\' and {} or 1000,
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vim.schedule_wrap(function()
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-- reset file-watch
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M.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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M.git_branch = ''
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end
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branch_cache[vim.fn.bufnr()] = M.git_branch
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end
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return M
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