348 lines
9.5 KiB
Lua
348 lines
9.5 KiB
Lua
local util = require("git.util")
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local M = {}
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M.UNMERGED = {
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DD = true,
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AU = true,
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UD = true,
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UA = true,
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DU = true,
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AA = true,
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UU = true,
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}
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---@param code string porcelain v1 XY code
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---@return string? char
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---@return string? hl_group
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function M.indicator(code)
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if code == "" then
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return nil
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end
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if code == "??" then
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return "?", "GitUntracked"
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end
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if code == "!!" then
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return "!", "GitIgnored"
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end
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if M.UNMERGED[code] then
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return "U", "GitUnmerged"
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end
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local x, y = code:sub(1, 1), code:sub(2, 2)
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if x == "R" or y == "R" then
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return "R", "GitRenamed"
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end
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if y == " " and x ~= " " then
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return x, "GitStaged"
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end
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if y == "D" then
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return "D", "GitDeleted"
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end
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return "M", "GitUnstaged"
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end
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---@param code string
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---@return string?
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local function format(code)
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local char, hl = M.indicator(code)
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if not char then
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return nil
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end
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return string.format("%%#%s#%s%%*", hl, char)
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end
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---@param path string
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---@return string? gitdir
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---@return string? worktree
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function M.resolve(path)
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local found = vim.fs.find(".git", { upward = true, path = path })[1]
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if not found then
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return nil
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end
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local worktree = vim.fs.dirname(found)
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local stat = vim.uv.fs_stat(found)
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if not stat then
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return nil
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end
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if stat.type == "directory" then
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return found, worktree
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end
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local f = io.open(found, "r")
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if not f then
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return nil
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end
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local content = f:read("*a")
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f:close()
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local gitdir = content:match("gitdir:%s*(%S+)")
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if not gitdir then
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util.warning(".git file at %s has no `gitdir:` line", found)
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return nil
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end
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if not gitdir:match("^/") then
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gitdir = vim.fs.joinpath(worktree, gitdir)
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end
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return vim.fs.normalize(gitdir), worktree
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end
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---Resolve the gitdir/worktree from the current buffer's file path,
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---falling back to `vim.fn.getcwd()` when the buffer is unnamed or
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---carries a synthetic URI (`git://`, `gitlog://`) that isn't a real
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---filesystem path. Returns nil for both when not inside a git repo.
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---@return string? gitdir
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---@return string? worktree
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function M.resolve_cwd()
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local path = vim.api.nvim_buf_get_name(0)
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if path == "" or path:match("^%a+://") then
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path = vim.fn.getcwd()
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end
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return M.resolve(path)
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end
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---@class ow.Git.Repo
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---@field gitdir string
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---@field worktree string
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---@field buffers table<integer, true> set of registered buffer numbers
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---@field watcher? uv.uv_fs_event_t
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---@field refresh fun(self: ow.Git.Repo)
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---@field refresh_handle ow.Git.Util.DebounceHandle
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local Repo = {}
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Repo.__index = Repo
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function Repo:start_watcher()
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local watcher = assert(vim.uv.new_fs_event())
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assert(watcher:start(self.gitdir, {}, function(err, filename)
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if err or (filename ~= "index" and filename ~= "HEAD") then
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return
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end
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self:refresh()
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end))
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self.watcher = watcher
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end
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function Repo:stop_watcher()
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-- Stop the libuv watcher first so no further fs-events can trigger
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-- self:refresh(). Only then tear down the debounce handle. The reverse
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-- order leaves a window where an in-flight watcher callback would call
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-- a closed debounce timer.
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if self.watcher then
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self.watcher:stop()
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self.watcher:close()
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self.watcher = nil
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end
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self.refresh_handle.close()
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end
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---@param buf integer
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function Repo:add_buffer(buf)
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self.buffers[buf] = true
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end
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---@param buf integer
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function Repo:remove_buffer(buf)
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self.buffers[buf] = nil
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end
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---@return boolean
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function Repo:has_buffers()
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return next(self.buffers) ~= nil
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end
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---@param repo ow.Git.Repo
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local function do_refresh(repo)
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-- `--branch` adds the `## branch...upstream [ahead/behind]` line that
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-- the sidebar parses. The per-buffer indicator only needs the XY +
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-- path lines, so it ignores `##` lines below. Running with `--branch`
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-- lets the sidebar reuse this single subprocess via the GitRefresh
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-- data payload instead of spawning its own.
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vim.system(
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{
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"git",
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"-c",
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"core.quotePath=false",
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"status",
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"--porcelain=v1",
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"--branch",
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},
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{ cwd = repo.worktree, text = true },
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vim.schedule_wrap(function(obj)
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local statuses = {}
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if obj.code == 0 then
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for line in (obj.stdout or ""):gmatch("[^\r\n]+") do
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if line:sub(1, 2) ~= "##" then
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local code = line:sub(1, 2)
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local x = code:sub(1, 1)
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local y = code:sub(2, 2)
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local path_part = line:sub(4)
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-- ` -> ` only appears in renames/copies. Without
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-- this guard, a literal filename containing the
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-- arrow (rare with `core.quotePath=false`) would
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-- be mis-parsed.
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if x == "R" or x == "C" or y == "R" or y == "C" then
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local arrow = path_part:find(" -> ", 1, true)
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if arrow then
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path_part = path_part:sub(arrow + 4)
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end
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end
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statuses[vim.fs.joinpath(repo.worktree, path_part)] =
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format(code)
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end
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end
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else
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util.warning(
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"git status failed: %s",
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vim.trim(obj.stderr or "")
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)
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end
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local dirty = false
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for buf in pairs(repo.buffers) do
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if not vim.api.nvim_buf_is_valid(buf) then
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repo.buffers[buf] = nil
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else
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local status = statuses[vim.api.nvim_buf_get_name(buf)]
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if vim.b[buf].git_status ~= status then
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vim.b[buf].git_status = status
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dirty = true
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end
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end
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end
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if dirty then
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vim.cmd.redrawstatus({ bang = true })
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end
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vim.api.nvim_exec_autocmds("User", {
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pattern = "GitRefresh",
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data = {
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gitdir = repo.gitdir,
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worktree = repo.worktree,
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porcelain_stdout = obj.code == 0 and obj.stdout or nil,
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},
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})
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end)
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)
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end
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---@param gitdir string
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---@param worktree string
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---@return ow.Git.Repo
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function Repo.new(gitdir, worktree)
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local self = setmetatable({
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gitdir = gitdir,
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worktree = worktree,
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buffers = {},
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}, Repo)
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self.refresh, self.refresh_handle = util.debounce(do_refresh, 50)
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self:start_watcher()
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return self
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end
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---@type table<string, ow.Git.Repo>
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local repo_by_gitdir = {}
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---@type table<integer, ow.Git.Repo>
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local repo_by_buf = {}
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---@param buf integer
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---@return ow.Git.Repo?
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local function register(buf)
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local existing = repo_by_buf[buf]
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if existing then
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return existing
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end
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local path = vim.api.nvim_buf_get_name(buf)
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if path == "" then
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return nil
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end
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local gitdir, worktree = M.resolve(path)
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if not gitdir or not worktree then
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return nil
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end
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local repo = repo_by_gitdir[gitdir]
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if not repo then
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repo = Repo.new(gitdir, worktree)
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repo_by_gitdir[gitdir] = repo
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end
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repo:add_buffer(buf)
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repo_by_buf[buf] = repo
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return repo
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end
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---@param buf integer
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function M.unregister(buf)
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local repo = repo_by_buf[buf]
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if not repo then
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return
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end
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repo_by_buf[buf] = nil
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repo:remove_buffer(buf)
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if not repo:has_buffers() then
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repo:stop_watcher()
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repo_by_gitdir[repo.gitdir] = nil
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end
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end
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---@param buf integer
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function M.refresh_buf(buf)
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if not vim.api.nvim_buf_is_valid(buf) or vim.bo[buf].buftype ~= "" then
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return
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end
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local repo = register(buf)
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if not repo then
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vim.b[buf].git_status = nil
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return
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end
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repo:refresh()
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end
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function M.stop_all()
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for _, repo in pairs(repo_by_gitdir) do
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repo:stop_watcher()
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end
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end
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---@param path string
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---@return string?
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function M.head(path)
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local gitdir = M.resolve(path)
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if not gitdir then
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return nil
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end
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local f = io.open(vim.fs.joinpath(gitdir, "HEAD"), "r")
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if not f then
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return nil
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end
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local first = f:read("*l")
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f:close()
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if not first then
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return nil
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end
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local branch = first:match("^ref:%s*refs/heads/(%S+)")
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if branch then
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return branch
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end
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local sha = first:match("^(%x+)")
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if sha then
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return sha:sub(1, 7)
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end
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return nil
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end
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---Resolve a git revision to its object SHA. Returns nil if the ref can't
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---be parsed (root-commit's `^`, blob's `^`, malformed ref, etc.). When
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---`short` is true, the result is abbreviated via `core.abbrev`
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---(auto-extended by git to keep the prefix unique in the current repo).
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---@param worktree string
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---@param ref string
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---@param short boolean
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---@return string?
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function M.rev_parse(worktree, ref, short)
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local cmd = { "git", "rev-parse", "--verify", "--quiet" }
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if short then
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table.insert(cmd, "--short")
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end
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table.insert(cmd, ref)
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local stdout = util.exec(cmd, { cwd = worktree, silent = true })
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local trimmed = stdout and vim.trim(stdout) or ""
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return trimmed ~= "" and trimmed or nil
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end
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return M
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