447 lines
10 KiB
Lua
447 lines
10 KiB
Lua
local status = require("git.status")
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local util = require("git.util")
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local M = {}
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---@param buf? integer
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---@return integer
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local function expand_buf(buf)
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if not buf or buf == 0 then
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return vim.api.nvim_get_current_buf()
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end
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return buf
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end
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---@class ow.Git.Repo.BufState
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---@field repo ow.Git.Repo
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---@field sha string?
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---@field parent_sha string?
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---@field immutable boolean?
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---@field index_writer boolean?
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---@field index_mode string?
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---@field log_max_count integer?
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---@alias ow.Git.Repo.Event "refresh"
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local global = util.Emitter.new()
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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, ow.Git.Repo.BufState>
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---@field tabs table<integer, true>
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---@field status ow.Git.Status
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---@field private _events ow.Git.Util.Emitter<ow.Git.Repo.Event>
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---@field private _watcher? uv.uv_fs_event_t
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---@field private _schedule_refresh fun(self: ow.Git.Repo)
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---@field private _refresh_handle ow.Git.Util.DebounceHandle
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local Repo = {}
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Repo.__index = Repo
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local STATUS_CMD = {
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"git",
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"--no-optional-locks",
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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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"--ignored",
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"--untracked-files=all",
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}
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---@private
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function Repo:_fetch_status()
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vim.system(
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STATUS_CMD,
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{ cwd = self.worktree, text = true },
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vim.schedule_wrap(function(obj)
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if obj.code ~= 0 then
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util.error("git status failed: %s", vim.trim(obj.stderr or ""))
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return
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end
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self.status = status.parse(obj.stdout or "")
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self._events:emit("refresh", self.status)
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global:emit("refresh", self, self.status)
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end)
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)
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end
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function Repo:refresh()
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self:_schedule_refresh()
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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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tabs = {},
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status = status.parse(""),
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_events = util.Emitter.new(),
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}, Repo)
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self._schedule_refresh, self._refresh_handle =
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util.debounce(Repo._fetch_status, 50)
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self:start_watcher()
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self:refresh()
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return self
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end
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function Repo:start_watcher()
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local watcher, err = vim.uv.new_fs_event()
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if not watcher then
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util.error(
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"git: failed to create fs_event for %s: %s",
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self.gitdir,
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err
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)
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return
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end
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local ok, start_err = watcher:start(
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self.gitdir,
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{ recursive = true },
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function(err_, filename)
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if
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err_
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or filename:match("^objects/")
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or filename:match("^logs/")
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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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)
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if not ok then
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util.error("failed to watch %s: %s", self.gitdir, tostring(start_err))
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watcher:close()
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return
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end
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self._watcher = watcher
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end
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function Repo:close()
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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 event ow.Git.Repo.Event
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---@param fn fun(...)
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---@return fun() unsubscribe
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function Repo:on(event, fn)
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return self._events:on(event, fn)
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end
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---@param buf? integer
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---@return ow.Git.Repo.BufState?
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function Repo:state(buf)
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return self.buffers[expand_buf(buf)]
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end
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---@return string?
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function Repo:head()
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local f = io.open(vim.fs.joinpath(self.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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---@return string[]
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function Repo:list_refs()
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local out = util.exec({
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"git",
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"for-each-ref",
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"--format=%(refname:short)",
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"refs/heads",
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"refs/tags",
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"refs/remotes",
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}, { cwd = self.worktree, silent = true })
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if not out then
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return {}
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end
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local refs = util.split_lines(out)
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table.insert(refs, 1, "HEAD")
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return refs
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end
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---@param rev string
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---@param short boolean
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---@return string?
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function Repo:rev_parse(rev, 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, rev)
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local stdout = util.exec(cmd, { cwd = self.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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---@type table<string, ow.Git.Repo> keyed by worktree
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local repos = {}
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---@param event ow.Git.Repo.Event
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---@param fn fun(...)
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---@return fun() unsubscribe
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function M.on(event, fn)
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return global:on(event, fn)
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end
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---@param prefix string
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---@param fn fun(buf: integer, r: ow.Git.Repo)
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---@return fun() unsubscribe
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function M.on_uri_refresh(prefix, fn)
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return M.on("refresh", function(r)
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for buf in pairs(r.buffers) do
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if vim.api.nvim_buf_is_valid(buf) then
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local name = vim.api.nvim_buf_get_name(buf)
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if name:sub(1, #prefix) == prefix then
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fn(buf, r)
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end
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end
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end
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end)
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end
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---@param r ow.Git.Repo
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local function release(r)
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if repos[r.worktree] ~= r then
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return
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end
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if next(r.buffers) ~= nil or next(r.tabs) ~= nil then
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return
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end
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r:close()
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repos[r.worktree] = nil
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end
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---@param buf integer
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---@return ow.Git.Repo?
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local function find_by_buf(buf)
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for _, r in pairs(repos) do
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if r.buffers[buf] then
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return r
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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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---@param path string
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---@return ow.Git.Repo?
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local function find_by_path(path)
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if path == "" then
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return nil
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end
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if repos[path] then
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return repos[path]
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end
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for wt, r in pairs(repos) do
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if path:sub(1, #wt + 1) == wt .. "/" then
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return r
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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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---@param buf integer
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---@return string
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local function path_for_buf(buf)
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local path = vim.api.nvim_buf_get_name(buf)
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if path == "" or path:match("^%a+://") then
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return vim.fn.getcwd()
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end
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return vim.fn.resolve(path)
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end
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---@param arg? integer | string bufnr (default current) or worktree path
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---@return ow.Git.Repo?
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function M.find(arg)
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if type(arg) == "string" then
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return find_by_path(arg)
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end
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local buf = expand_buf(arg)
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return find_by_buf(buf) or find_by_path(path_for_buf(buf))
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end
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---@param arg? integer | string bufnr (default current) or worktree path
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---@return ow.Git.Repo?
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function M.resolve(arg)
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local existing = M.find(arg)
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if existing then
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return existing
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end
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local path
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if type(arg) == "string" then
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path = vim.fn.resolve(arg)
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else
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path = path_for_buf(expand_buf(arg))
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end
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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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if repos[worktree] then
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return repos[worktree]
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end
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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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local gitdir
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if stat.type == "directory" then
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gitdir = found
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else
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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 rel = content:match("gitdir:%s*(%S+)")
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if not rel then
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util.error(".git file at %s has no `gitdir:` line", found)
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return nil
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end
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gitdir = vim.fs.normalize(
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rel:match("^/") and rel or vim.fs.joinpath(worktree, rel)
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)
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end
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local r = Repo.new(gitdir, worktree)
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repos[worktree] = r
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return r
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end
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---@param buf? integer
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---@return ow.Git.Repo.BufState?
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function M.state(buf)
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buf = expand_buf(buf)
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local r = find_by_buf(buf)
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return r and r.buffers[buf]
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end
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---@param buf? integer
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---@param r ow.Git.Repo
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function M.bind(buf, r)
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buf = expand_buf(buf)
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local prev = find_by_buf(buf)
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if prev == r then
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return
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end
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if prev then
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prev.buffers[buf] = nil
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release(prev)
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end
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r.buffers[buf] = { repo = r }
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end
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---@param buf? integer
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function M.unbind(buf)
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buf = expand_buf(buf)
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local r = find_by_buf(buf)
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if not r then
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return
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end
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r.buffers[buf] = nil
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release(r)
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end
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---@param buf integer
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---@return boolean
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local function is_worktree_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 false
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end
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local path = vim.api.nvim_buf_get_name(buf)
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return path ~= "" and not path:match("^%a+://")
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end
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---@param buf? integer
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function M.track(buf)
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buf = expand_buf(buf)
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if not is_worktree_buf(buf) then
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return
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end
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local r = M.resolve(buf)
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if r and not r.buffers[buf] then
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M.bind(buf, r)
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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)
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local r = find_by_buf(expand_buf(buf))
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if r then
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r:refresh()
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end
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end
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function M.refresh_all()
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for _, r in pairs(repos) do
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r:refresh()
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end
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end
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function M.update_cwd_repo()
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local tab = vim.api.nvim_get_current_tabpage()
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local new = M.resolve(vim.fn.getcwd())
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local old
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for _, r in pairs(repos) do
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if r.tabs[tab] then
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old = r
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break
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end
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end
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if new == old then
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return
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end
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if old then
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old.tabs[tab] = nil
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release(old)
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end
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if new then
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new.tabs[tab] = true
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new:refresh()
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end
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end
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---@param tab integer
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function M.release_tab(tab)
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for _, r in pairs(repos) do
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if r.tabs[tab] then
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r.tabs[tab] = nil
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release(r)
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return
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end
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end
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end
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function M.stop_all()
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for _, r in pairs(repos) do
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r:close()
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end
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end
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return M
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