139 lines
4.0 KiB
Lua
139 lines
4.0 KiB
Lua
local lualine_require = require('lualine_require')
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local modules = lualine_require.lazy_require({
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utils = 'lualine.utils.utils',
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Job = 'lualine.utils.job',
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})
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local M = {}
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-- Vars
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-- variable to store git diff stats
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local git_diff = nil
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-- accumulates output from diff process
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local diff_output_cache = {}
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-- variable to store git_diff job
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local diff_job = nil
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local active_bufnr = '0'
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local diff_cache = {} -- Stores last known value of diff of a buffer
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---initialize the module
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---param opts table
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function M.init(opts)
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if type(opts.source) == 'function' then
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M.src = opts.source
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else
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modules.utils.define_autocmd('BufEnter', "lua require'lualine.components.diff.git_diff'.update_diff_args()")
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modules.utils.define_autocmd('BufWritePost', "lua require'lualine.components.diff.git_diff'.update_git_diff()")
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M.update_diff_args()
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end
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end
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---Api to get git sign count
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---scheme :
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---{
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--- added = added_count,
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--- modified = modified_count,
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--- removed = removed_count,
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---}
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---error_code = { added = -1, modified = -1, removed = -1 }
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---@param bufnr number|nil
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function M.get_sign_count(bufnr)
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if bufnr then
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return diff_cache[bufnr]
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end
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if M.src then
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git_diff = M.src()
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diff_cache[vim.fn.bufnr()] = git_diff
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elseif 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.update_diff_args()
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end
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return git_diff
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end
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---process diff data and update git_diff{ added, removed, modified }
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---@param data string output on stdout od git diff job
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local function process_diff(data)
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-- Adapted from https://github.com/wbthomason/nvim-vcs.lua
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local added, removed, modified = 0, 0, 0
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for _, line in ipairs(data) do
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if string.find(line, [[^@@ ]]) then
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local tokens = vim.fn.matchlist(line, [[^@@ -\v(\d+),?(\d*) \+(\d+),?(\d*)]])
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local line_stats = {
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mod_count = tokens[3] == nil and 0 or tokens[3] == '' and 1 or tonumber(tokens[3]),
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new_count = tokens[5] == nil and 0 or tokens[5] == '' and 1 or tonumber(tokens[5]),
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}
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if line_stats.mod_count == 0 and line_stats.new_count > 0 then
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added = added + line_stats.new_count
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elseif line_stats.mod_count > 0 and line_stats.new_count == 0 then
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removed = removed + line_stats.mod_count
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else
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local min = math.min(line_stats.mod_count, line_stats.new_count)
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modified = modified + min
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added = added + line_stats.new_count - min
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removed = removed + line_stats.mod_count - min
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end
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end
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end
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git_diff = { added = added, modified = modified, removed = removed }
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end
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---updates the job args
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function M.update_diff_args()
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-- Donn't show git diff when current buffer doesn't have a filename
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active_bufnr = tostring(vim.fn.bufnr())
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if #vim.fn.expand('%') == 0 then
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M.diff_args = nil
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git_diff = nil
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return
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end
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M.diff_args = {
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cmd = string.format(
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[[git -C %s --no-pager diff --no-color --no-ext-diff -U0 -- %s]],
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vim.fn.expand('%:h'),
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vim.fn.expand('%:t')
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),
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on_stdout = function(_, data)
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if next(data) then
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diff_output_cache = vim.list_extend(diff_output_cache, data)
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end
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end,
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on_stderr = function(_, data)
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data = table.concat(data, '\n')
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if #data > 0 then
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git_diff = nil
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diff_output_cache = {}
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end
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end,
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on_exit = function()
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if #diff_output_cache > 0 then
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process_diff(diff_output_cache)
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else
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git_diff = { added = 0, modified = 0, removed = 0 }
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end
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diff_cache[vim.fn.bufnr()] = git_diff
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end,
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}
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M.update_git_diff()
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end
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---update git_diff veriable
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function M.update_git_diff()
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if M.diff_args then
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diff_output_cache = {}
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if diff_job then
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diff_job:stop()
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end
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diff_job = modules.Job(M.diff_args)
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if diff_job then
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diff_job:start()
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end
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end
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end
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return M
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