854 lines
26 KiB
Lua
854 lines
26 KiB
Lua
local diff = require("git.diff")
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local log = require("log")
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local repo = require("git.repo")
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local M = {}
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local SECTIONS = {
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"Untracked",
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"Unstaged",
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"Staged",
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"Unmerged",
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"Unpushed",
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"Unpulled",
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}
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local SIDEBAR_WIDTH = 50
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---@class ow.Git.FileEntry
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---@field section string
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---@field path string
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---@field orig string?
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---@field x string porcelain v1 column 1 (always set; may be a literal space)
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---@field y string porcelain v1 column 2 (always set; may be a literal space)
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---@class ow.Git.CommitEntry
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---@field section string
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---@field sha string
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---@field subject string?
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---@alias ow.Git.StatusEntry ow.Git.FileEntry | ow.Git.CommitEntry
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---@class ow.Git.StatusState
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---@field gitdir string
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---@field worktree string
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---@field lines table<integer, ow.Git.StatusEntry>
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---@field diff_left_win integer?
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---@field diff_right_win integer?
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---@field user_aucmd integer?
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---@field last_shown_key string?
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---@type table<integer, ow.Git.StatusState>
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local state = {}
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local group =
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vim.api.nvim_create_augroup("ow.git.status_win", { clear = false })
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local ns = vim.api.nvim_create_namespace("ow.git.status_win")
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---@return integer? win
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---@return integer? bufnr
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local function find_sidebar()
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for _, win in ipairs(vim.api.nvim_tabpage_list_wins(0)) do
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local buf = vim.api.nvim_win_get_buf(win)
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if vim.bo[buf].filetype == "gitstatus" then
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return win, buf
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end
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end
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end
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---@param entry ow.Git.StatusEntry
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---@return string?
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local function entry_code(entry)
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if entry.section == "Untracked" then
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return "??"
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elseif entry.section == "Unmerged" then
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return entry.x .. entry.y
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elseif entry.section == "Staged" then
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return entry.x .. " "
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elseif entry.section == "Unstaged" then
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return " " .. entry.y
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end
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end
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---@param entry ow.Git.StatusEntry
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---@return string? line
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---@return string? hl_group
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---@return integer? hl_len byte length of the symbol portion at column 2
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local function format_entry(entry)
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if entry.sha then
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return string.format(" %s %s", entry.sha, entry.subject or ""),
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"GitSha",
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#entry.sha
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end
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local code = entry_code(entry)
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if not code then
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return nil
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end
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local char, hl = repo.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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local label = entry.orig and (entry.orig .. " -> " .. entry.path)
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or entry.path
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return string.format(" %s %s", char, label), hl, #char
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end
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---@class ow.Git.BranchInfo
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---@field head string?
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---@field upstream string?
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---@field ahead integer
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---@field behind integer
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---@param line string '## branch.line' from porcelain v1
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---@return ow.Git.BranchInfo
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local function parse_branch_line(line)
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local info = { ahead = 0, behind = 0 }
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local content = line:sub(4)
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local arrow = content:find("...", 1, true)
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if not arrow then
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info.head = content
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return info
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end
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info.head = content:sub(1, arrow - 1)
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local rest = content:sub(arrow + 3)
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local bracket = rest:find(" %[")
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if not bracket then
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info.upstream = rest
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return info
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end
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info.upstream = rest:sub(1, bracket - 1)
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local inside = rest:match("%[([^%]]+)%]")
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if inside then
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info.ahead = (tonumber(inside:match("ahead (%d+)")) or 0) --[[@as integer]]
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info.behind = (tonumber(inside:match("behind (%d+)")) or 0) --[[@as integer]]
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end
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return info
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end
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---@param worktree string
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---@param callback fun(branch: ow.Git.BranchInfo, groups: table<string, ow.Git.StatusEntry[]>)
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local function fetch_status(worktree, callback)
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vim.system({
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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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}, { cwd = worktree, text = true }, function(obj)
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vim.schedule(function()
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local branch = { ahead = 0, behind = 0 }
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local groups = {
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Untracked = {},
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Unstaged = {},
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Staged = {},
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Unmerged = {},
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Unpushed = {},
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Unpulled = {},
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}
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if obj.code ~= 0 then
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log.error("git status failed: %s", vim.trim(obj.stderr or ""))
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end
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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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branch = parse_branch_line(line)
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else
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local x = line:sub(1, 1)
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local y = line:sub(2, 2)
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local rest = line:sub(4)
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local orig
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local arrow = rest:find(" -> ", 1, true)
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if arrow then
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orig = rest:sub(1, arrow - 1)
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rest = rest:sub(arrow + 4)
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end
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local entry = {
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section = nil,
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path = rest,
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orig = orig,
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x = x,
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y = y,
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}
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if x == "?" and y == "?" then
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entry.section = "Untracked"
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table.insert(groups.Untracked, entry)
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elseif repo.UNMERGED[x .. y] then
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entry.section = "Unmerged"
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table.insert(groups.Unmerged, entry)
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else
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if x ~= " " then
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table.insert(groups.Staged, {
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section = "Staged",
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path = entry.path,
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orig = entry.orig,
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x = entry.x,
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y = entry.y,
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})
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end
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if y ~= " " then
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table.insert(groups.Unstaged, {
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section = "Unstaged",
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path = entry.path,
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orig = entry.orig,
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x = entry.x,
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y = entry.y,
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})
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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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local fetches = {}
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if branch.upstream and branch.ahead > 0 then
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table.insert(
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fetches,
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{ section = "Unpushed", range = "@{upstream}..HEAD" }
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)
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end
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if branch.upstream and branch.behind > 0 then
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table.insert(
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fetches,
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{ section = "Unpulled", range = "HEAD..@{upstream}" }
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)
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end
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if #fetches == 0 then
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callback(branch, groups)
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return
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end
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local pending = #fetches
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for _, f in ipairs(fetches) do
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vim.system({
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"git",
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"log",
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"--format=%h %s",
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f.range,
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}, { cwd = worktree, text = true }, function(
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log_obj
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)
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vim.schedule(function()
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if log_obj.code == 0 then
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for line in
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(log_obj.stdout or ""):gmatch("[^\r\n]+")
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do
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local sha, subject =
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line:match("^(%S+)%s+(.+)$")
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if sha then
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table.insert(groups[f.section], {
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section = f.section,
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sha = sha,
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subject = subject,
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})
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end
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end
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else
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log.error(
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"git log %s failed: %s",
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f.range,
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vim.trim(log_obj.stderr or "")
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)
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end
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pending = pending - 1
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if pending == 0 then
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callback(branch, groups)
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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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end)
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end
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---@param bufnr integer
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---@param branch ow.Git.BranchInfo
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---@param groups table<string, ow.Git.StatusEntry[]>
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local function render(bufnr, branch, groups)
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local lines = { "Head: " .. (branch.head or "?") }
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if branch.upstream then
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local push = "Push: " .. branch.upstream
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if branch.ahead > 0 then
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push = push .. " +" .. branch.ahead
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end
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if branch.behind > 0 then
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push = push .. " -" .. branch.behind
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end
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table.insert(lines, push)
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end
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table.insert(lines, "")
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local meta = {}
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local marks = {}
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for _, section in ipairs(SECTIONS) do
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local entries = groups[section]
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if entries and #entries > 0 then
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table.insert(lines, string.format("%s (%d)", section, #entries))
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for _, entry in ipairs(entries) do
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local line, hl, hl_len = format_entry(entry)
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if line then
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table.insert(lines, line)
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meta[#lines] = entry
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if hl and hl_len then
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table.insert(marks, {
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row = #lines - 1,
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col = 2,
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end_col = 2 + hl_len,
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hl = hl,
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})
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end
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end
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end
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table.insert(lines, "")
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end
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end
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vim.bo[bufnr].modifiable = true
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vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, lines)
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vim.bo[bufnr].modifiable = false
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vim.api.nvim_buf_clear_namespace(bufnr, ns, 0, -1)
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for _, m in ipairs(marks) do
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vim.api.nvim_buf_set_extmark(bufnr, ns, m.row, m.col, {
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end_col = m.end_col,
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hl_group = m.hl,
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})
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end
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state[bufnr].lines = meta
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end
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---@param bufnr integer
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local function refresh(bufnr)
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local s = state[bufnr]
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if not s then
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return
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end
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local saved_path, saved_sha
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for _, win in ipairs(vim.api.nvim_list_wins()) do
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if vim.api.nvim_win_get_buf(win) == bufnr then
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local lnum = vim.api.nvim_win_get_cursor(win)[1]
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local entry = s.lines[lnum]
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if entry then
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saved_path = entry.path
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saved_sha = entry.sha
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end
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break
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end
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end
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fetch_status(s.worktree, function(branch, groups)
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if not vim.api.nvim_buf_is_valid(bufnr) then
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return
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end
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render(bufnr, branch, groups)
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if not saved_path and not saved_sha then
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return
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end
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for lnum, entry in pairs(s.lines) do
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if
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(saved_path and entry.path == saved_path)
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or (saved_sha and entry.sha == saved_sha)
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then
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for _, win in ipairs(vim.api.nvim_list_wins()) do
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if vim.api.nvim_win_get_buf(win) == bufnr then
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pcall(vim.api.nvim_win_set_cursor, win, { lnum, 0 })
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end
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end
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break
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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 bufnr integer
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---@return ow.Git.StatusState?
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---@return ow.Git.StatusEntry?
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local function current_entry(bufnr)
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local s = state[bufnr]
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if not s then
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return nil, nil
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end
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local lnum = vim.api.nvim_win_get_cursor(0)[1]
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return s, s.lines[lnum]
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end
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---@class ow.Git.DiffSide
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---@field buf integer
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---@field name string?
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---@class ow.Git.DiffPair
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---@field left ow.Git.DiffSide
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---@field right ow.Git.DiffSide
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---@param worktree string
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---@param path string
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---@param content boolean
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---@return ow.Git.DiffSide
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local function head_pane(worktree, path, content)
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return {
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buf = content and diff.git_show_buf(worktree, "HEAD", path)
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or diff.empty_buf(),
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name = "git://HEAD/" .. path,
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}
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end
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---@param worktree string
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---@param path string
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---@param exists boolean
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---@return ow.Git.DiffSide
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local function worktree_pane(worktree, path, exists)
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if exists then
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return {
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buf = diff.load_file_buf(vim.fs.joinpath(worktree, path)),
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name = nil,
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}
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end
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return { buf = diff.empty_buf(), name = "git://worktree/" .. path }
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end
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---@param s ow.Git.StatusState
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---@param entry ow.Git.FileEntry
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---@return ow.Git.DiffSide
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local function index_pane(s, entry)
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local in_index = not (
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entry.section == "Untracked"
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or (entry.section == "Staged" and entry.x == "D")
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)
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return {
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buf = in_index and diff.git_show_buf(s.worktree, "", entry.path, true)
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or diff.empty_buf(),
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name = "git://index/" .. entry.path,
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}
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end
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---@param s ow.Git.StatusState
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---@param entry ow.Git.FileEntry
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---@return ow.Git.DiffSide?
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local function other_pane(s, entry)
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local p = entry.path
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local worktree = s.worktree
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if entry.section == "Staged" then
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if entry.x == "A" then
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return head_pane(worktree, p, false)
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end
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if entry.x == "D" then
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return head_pane(worktree, p, true)
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end
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-- HEAD holds the pre-rename path
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return head_pane(worktree, entry.orig or p, true)
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end
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if entry.section == "Unstaged" then
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return worktree_pane(worktree, p, entry.y ~= "D")
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end
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if entry.section == "Untracked" then
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return worktree_pane(worktree, p, true)
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end
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end
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---@param s ow.Git.StatusState
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---@param entry ow.Git.StatusEntry
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---@return ow.Git.DiffPair?
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local function compute_pair(s, entry)
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if not entry.path then
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return nil
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end
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---@cast entry ow.Git.FileEntry
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local other = other_pane(s, entry)
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if not other then
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return nil
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end
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return { left = index_pane(s, entry), right = other }
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end
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---@param win integer
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local function reset_diff_win(win)
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vim.api.nvim_win_call(win, function()
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vim.cmd(
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"setlocal winfixwidth< number< relativenumber< signcolumn< wrap< cursorline<"
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)
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end)
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end
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---@param sidebar_win integer
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---@return integer?
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local function find_default_main_win(sidebar_win)
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local non_sidebar = {}
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for _, win in ipairs(vim.api.nvim_tabpage_list_wins(0)) do
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if win ~= sidebar_win then
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table.insert(non_sidebar, win)
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end
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end
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if #non_sidebar ~= 1 then
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return nil
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end
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local buf = vim.api.nvim_win_get_buf(non_sidebar[1])
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if
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vim.api.nvim_buf_get_name(buf) == ""
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and vim.bo[buf].buftype == ""
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and not vim.bo[buf].modified
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and vim.api.nvim_buf_line_count(buf) == 1
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and vim.api.nvim_buf_get_lines(buf, 0, 1, false)[1] == ""
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then
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return non_sidebar[1]
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end
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end
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---@param win integer
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---@param enabled boolean
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local function set_diff(win, enabled)
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vim.api.nvim_win_call(win, function()
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vim.cmd(enabled and "diffthis" or "diffoff")
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end)
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if enabled then
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vim.wo[win].foldenable = true
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vim.wo[win].foldlevel = 0
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end
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end
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---@param s ow.Git.StatusState
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---@param sidebar_win integer
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---@return integer? left
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---@return integer? right
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local function adopt_diff_wins(s, sidebar_win)
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local left = s.diff_left_win
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local right = s.diff_right_win
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if left and not vim.api.nvim_win_is_valid(left) then
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left = nil
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end
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if right and not vim.api.nvim_win_is_valid(right) then
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right = nil
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end
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if left and right then
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return left, right
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end
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for _, win in ipairs(vim.api.nvim_tabpage_list_wins(0)) do
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if win ~= sidebar_win then
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local role = vim.w[win].git_diff_role
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if role == "left" and not left then
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left = win
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elseif role == "right" and not right then
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right = win
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end
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end
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end
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return left, right
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end
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---@param entry ow.Git.StatusEntry
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---@return string
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local function entry_key(entry)
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return entry.section
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.. "|"
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.. (entry.path or entry.sha or "")
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.. "|"
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.. (entry.orig or "")
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end
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|
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---@param s ow.Git.StatusState
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---@param entry ow.Git.StatusEntry
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---@param focus_left boolean
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|
local function show_diff(s, entry, focus_left)
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local sidebar_win = find_sidebar()
|
|
if not sidebar_win then
|
|
return
|
|
end
|
|
|
|
local left_win, right_win = adopt_diff_wins(s, sidebar_win)
|
|
local key = entry_key(entry)
|
|
|
|
if s.last_shown_key == key and left_win and right_win then
|
|
if focus_left then
|
|
vim.api.nvim_set_current_win(left_win)
|
|
else
|
|
vim.api.nvim_set_current_win(sidebar_win)
|
|
end
|
|
return
|
|
end
|
|
|
|
local pair = compute_pair(s, entry)
|
|
if not pair then
|
|
return
|
|
end
|
|
|
|
if left_win and not right_win then
|
|
vim.api.nvim_set_current_win(left_win)
|
|
vim.cmd("rightbelow vertical split")
|
|
right_win = vim.api.nvim_get_current_win()
|
|
reset_diff_win(right_win)
|
|
elseif right_win and not left_win then
|
|
vim.api.nvim_set_current_win(right_win)
|
|
vim.cmd("leftabove vertical split")
|
|
left_win = vim.api.nvim_get_current_win()
|
|
reset_diff_win(left_win)
|
|
elseif not (left_win or right_win) then
|
|
local default_main = find_default_main_win(sidebar_win)
|
|
if default_main then
|
|
right_win = default_main
|
|
reset_diff_win(right_win)
|
|
vim.api.nvim_set_current_win(default_main)
|
|
vim.cmd("leftabove vertical split")
|
|
left_win = vim.api.nvim_get_current_win()
|
|
reset_diff_win(left_win)
|
|
else
|
|
-- No reusable default-empty window. Open the diff pair by
|
|
-- splitting from the sidebar. winfixwidth keeps the sidebar at 50
|
|
-- when there are other windows to absorb the split; if the
|
|
-- sidebar is the only window in the tab, the split has to take
|
|
-- from the sidebar itself, so restore the width explicitly.
|
|
vim.api.nvim_set_current_win(sidebar_win)
|
|
vim.cmd("rightbelow vertical split")
|
|
right_win = vim.api.nvim_get_current_win()
|
|
reset_diff_win(right_win)
|
|
vim.cmd("leftabove vertical split")
|
|
left_win = vim.api.nvim_get_current_win()
|
|
reset_diff_win(left_win)
|
|
vim.api.nvim_win_set_width(sidebar_win, SIDEBAR_WIDTH)
|
|
end
|
|
local combined = vim.api.nvim_win_get_width(left_win)
|
|
+ vim.api.nvim_win_get_width(right_win)
|
|
vim.api.nvim_win_set_width(left_win, math.floor(combined / 2))
|
|
end
|
|
|
|
assert(left_win and right_win, "diff windows must be set")
|
|
vim.w[left_win].git_diff_role = "left"
|
|
vim.w[right_win].git_diff_role = "right"
|
|
s.diff_left_win = left_win
|
|
s.diff_right_win = right_win
|
|
|
|
vim.api.nvim_win_set_buf(left_win, pair.left.buf)
|
|
vim.api.nvim_win_set_buf(right_win, pair.right.buf)
|
|
for _, side in ipairs({ pair.left, pair.right }) do
|
|
if side.name then
|
|
pcall(vim.api.nvim_buf_set_name, side.buf, side.name)
|
|
local ft = vim.filetype.match({ buf = side.buf })
|
|
if ft then
|
|
vim.bo[side.buf].filetype = ft
|
|
end
|
|
end
|
|
end
|
|
set_diff(left_win, true)
|
|
set_diff(right_win, true)
|
|
s.last_shown_key = key
|
|
|
|
if focus_left then
|
|
vim.api.nvim_set_current_win(left_win)
|
|
else
|
|
vim.api.nvim_set_current_win(sidebar_win)
|
|
end
|
|
end
|
|
|
|
---@param focus_left boolean
|
|
local function preview_or_open(focus_left)
|
|
local s, entry = current_entry(vim.api.nvim_get_current_buf())
|
|
if not s or not entry then
|
|
return
|
|
end
|
|
show_diff(s, entry, focus_left)
|
|
end
|
|
|
|
local function action_stage()
|
|
local s, entry = current_entry(vim.api.nvim_get_current_buf())
|
|
if not s or not entry or not entry.path then
|
|
return
|
|
end
|
|
---@cast entry ow.Git.FileEntry
|
|
if entry.section == "Staged" then
|
|
return
|
|
end
|
|
vim.system(
|
|
{ "git", "add", "--", entry.path },
|
|
{ cwd = s.worktree },
|
|
function(obj)
|
|
if obj.code ~= 0 then
|
|
vim.schedule(function()
|
|
log.error("git add failed: %s", vim.trim(obj.stderr or ""))
|
|
end)
|
|
end
|
|
end
|
|
)
|
|
end
|
|
|
|
local function action_unstage()
|
|
local s, entry = current_entry(vim.api.nvim_get_current_buf())
|
|
if not s or not entry or not entry.path then
|
|
return
|
|
end
|
|
---@cast entry ow.Git.FileEntry
|
|
if entry.section ~= "Staged" then
|
|
return
|
|
end
|
|
local cmd = { "git", "restore", "--staged", "--" }
|
|
if entry.orig then
|
|
table.insert(cmd, entry.orig)
|
|
end
|
|
table.insert(cmd, entry.path)
|
|
vim.system(cmd, { cwd = s.worktree }, function(obj)
|
|
if obj.code ~= 0 then
|
|
vim.schedule(function()
|
|
log.error(
|
|
"git restore --staged failed: %s",
|
|
vim.trim(obj.stderr or "")
|
|
)
|
|
end)
|
|
end
|
|
end)
|
|
end
|
|
|
|
local function action_discard()
|
|
local s, entry = current_entry(vim.api.nvim_get_current_buf())
|
|
if not s or not entry or not entry.path then
|
|
return
|
|
end
|
|
---@cast entry ow.Git.FileEntry
|
|
if entry.section == "Staged" then
|
|
log.warning("file has staged changes; unstage first with 'u'")
|
|
return
|
|
end
|
|
|
|
local prompt, action
|
|
if entry.section == "Untracked" then
|
|
prompt = string.format("Delete untracked file %s?", entry.path)
|
|
action = function()
|
|
local ok, err = os.remove(vim.fs.joinpath(s.worktree, entry.path))
|
|
if not ok then
|
|
log.error("failed to remove %s: %s", entry.path, err or "")
|
|
end
|
|
refresh(vim.api.nvim_get_current_buf())
|
|
end
|
|
elseif entry.section == "Unstaged" then
|
|
prompt = string.format("Discard changes to %s?", entry.path)
|
|
action = function()
|
|
vim.system(
|
|
{ "git", "checkout", "--", entry.path },
|
|
{ cwd = s.worktree },
|
|
function(obj)
|
|
if obj.code ~= 0 then
|
|
vim.schedule(function()
|
|
log.error(
|
|
"git checkout failed: %s",
|
|
vim.trim(obj.stderr or "")
|
|
)
|
|
end)
|
|
end
|
|
end
|
|
)
|
|
end
|
|
else
|
|
return
|
|
end
|
|
|
|
if vim.fn.confirm(prompt, "&Yes\n&No", 2) == 1 then
|
|
action()
|
|
end
|
|
end
|
|
|
|
local function action_help()
|
|
print(table.concat({
|
|
"git status sidebar",
|
|
" <Tab> preview diff (keep focus)",
|
|
" <CR> open diff (focus left pane)",
|
|
" s stage file",
|
|
" u unstage file",
|
|
" X discard worktree changes (untracked: delete file)",
|
|
" g? show this help",
|
|
}, "\n"))
|
|
end
|
|
|
|
---@param worktree string
|
|
local function open(worktree)
|
|
local existing = find_sidebar()
|
|
if existing then
|
|
vim.api.nvim_set_current_win(existing)
|
|
return
|
|
end
|
|
|
|
local gitdir = repo.resolve(worktree)
|
|
if not gitdir then
|
|
return
|
|
end
|
|
|
|
local previous_win = vim.api.nvim_get_current_win()
|
|
vim.cmd("leftabove vertical new")
|
|
local win = vim.api.nvim_get_current_win()
|
|
local bufnr = vim.api.nvim_get_current_buf()
|
|
|
|
vim.bo[bufnr].buftype = "nofile"
|
|
vim.bo[bufnr].bufhidden = "wipe"
|
|
vim.bo[bufnr].swapfile = false
|
|
vim.bo[bufnr].filetype = "gitstatus"
|
|
vim.bo[bufnr].modifiable = false
|
|
|
|
vim.wo[win].number = false
|
|
vim.wo[win].relativenumber = false
|
|
vim.wo[win].wrap = false
|
|
vim.wo[win].signcolumn = "no"
|
|
vim.wo[win].cursorline = true
|
|
vim.wo[win].winfixwidth = true
|
|
vim.api.nvim_win_set_width(win, SIDEBAR_WIDTH)
|
|
|
|
state[bufnr] = { gitdir = gitdir, worktree = worktree, lines = {} }
|
|
|
|
local function k(lhs, rhs, desc)
|
|
vim.keymap.set(
|
|
"n",
|
|
lhs,
|
|
rhs,
|
|
{ buffer = bufnr, silent = true, desc = desc }
|
|
)
|
|
end
|
|
k("<Tab>", function()
|
|
preview_or_open(false)
|
|
end, "Preview diff")
|
|
k("<CR>", function()
|
|
preview_or_open(true)
|
|
end, "Open diff")
|
|
k("s", action_stage, "Stage file")
|
|
k("u", action_unstage, "Unstage file")
|
|
k("X", action_discard, "Discard worktree changes")
|
|
k("g?", action_help, "Help")
|
|
|
|
state[bufnr].user_aucmd = vim.api.nvim_create_autocmd("User", {
|
|
pattern = "GitRefresh",
|
|
group = group,
|
|
callback = function(args)
|
|
if args.data and args.data.gitdir == gitdir then
|
|
refresh(bufnr)
|
|
end
|
|
end,
|
|
})
|
|
vim.api.nvim_create_autocmd({ "BufWipeout", "BufDelete" }, {
|
|
buffer = bufnr,
|
|
group = group,
|
|
callback = function()
|
|
local s = state[bufnr]
|
|
if not s then
|
|
return
|
|
end
|
|
if s.user_aucmd then
|
|
pcall(vim.api.nvim_del_autocmd, s.user_aucmd)
|
|
end
|
|
state[bufnr] = nil
|
|
end,
|
|
})
|
|
|
|
vim.api.nvim_set_current_win(previous_win)
|
|
refresh(bufnr)
|
|
end
|
|
|
|
function M.toggle()
|
|
local sidebar_win = find_sidebar()
|
|
if sidebar_win then
|
|
vim.api.nvim_win_close(sidebar_win, false)
|
|
return
|
|
end
|
|
local path = vim.api.nvim_buf_get_name(vim.api.nvim_get_current_buf())
|
|
if path == "" then
|
|
path = vim.fn.getcwd()
|
|
end
|
|
local _, worktree = repo.resolve(path)
|
|
if not worktree then
|
|
log.warning("not in a git repository")
|
|
return
|
|
end
|
|
open(worktree)
|
|
end
|
|
|
|
return M
|