refactor(git): simplify status view refresh and add R/BufEnter

lua/git/status_view.lua

@@ -37,7 +37,6 @@ end
 ---@field diff_right_win integer?
 ---@field unsubscribe fun()?
 ---@field last_shown_key string?
----@field last_render_key string?
 
 ---@type table<integer, ow.Git.StatusView.State>
 local state = {}
@@ -139,37 +138,10 @@ local function render(bufnr, status)
     state[bufnr].lines = meta
 end
 
----@param status ow.Git.Status
----@return string
-local function fingerprint(status)
-    local branch = status.branch
-    local parts = {
-        branch.head or "",
-        branch.upstream or "",
-        tostring(branch.ahead),
-        tostring(branch.behind),
-    }
-    for _, kind in ipairs(KINDS) do
-        for _, e in ipairs(status:by_kind(kind)) do
-            table.insert(
-                parts,
-                e.kind
-                    .. ":"
-                    .. e.path
-                    .. ":"
-                    .. (e.orig or "")
-                    .. ":"
-                    .. e.char
-            )
-        end
-    end
-    return table.concat(parts, "\0")
-end
-
 ---@param bufnr integer
 local function refresh(bufnr)
     local s = state[bufnr]
-    if not s then
+    if not s or not vim.api.nvim_buf_is_valid(bufnr) then
         return
     end
 
@@ -183,17 +155,8 @@ local function refresh(bufnr)
         end
     end
 
-    if not vim.api.nvim_buf_is_valid(bufnr) then
-        return
-    end
-    local status = s.repo.status
-    local fp = fingerprint(status)
-    if fp == s.last_render_key then
-        return
-    end
-    s.last_render_key = fp
     s.last_shown_key = nil
-    render(bufnr, status)
+    render(bufnr, s.repo.status)
     if not saved_path then
         return
     end
@@ -598,6 +561,7 @@ local function action_help(placement)
         lines,
         "  X      discard worktree changes (untracked: delete file)"
     )
+    table.insert(lines, "  R      refresh")
     table.insert(lines, "  g?     show this help")
     print(table.concat(lines, "\n"))
 end
@@ -653,6 +617,9 @@ local function setup_buffer(bufnr, r, placement, win, invocation_win)
     k("s", action_stage, "Stage file")
     k("u", action_unstage, "Unstage file")
     k("X", action_discard, "Discard worktree changes")
+    k("R", function()
+        r:refresh()
+    end, "Refresh")
     k("g?", function()
         action_help(state[bufnr].placement)
     end, "Help")
@@ -660,6 +627,13 @@ local function setup_buffer(bufnr, r, placement, win, invocation_win)
     state[bufnr].unsubscribe = r:on("refresh", function()
         refresh(bufnr)
     end)
+    vim.api.nvim_create_autocmd("BufEnter", {
+        buffer = bufnr,
+        group = group,
+        callback = function()
+            r:refresh()
+        end,
+    })
     vim.api.nvim_create_autocmd({ "BufWipeout", "BufDelete" }, {
         buffer = bufnr,
         group = group,
@@ -703,6 +677,7 @@ function M.open(opts)
     local visible = vim.fn.bufwinid(buf)
     if visible ~= -1 then
         vim.api.nvim_set_current_win(visible)
+        r:refresh()
         return
     end
 
@@ -725,6 +700,7 @@ function M.open(opts)
     if was_loaded then
         refresh(buf)
     end
+    r:refresh()
 end
 
 ---@param buf integer
@@ -758,6 +734,7 @@ function M.read_uri(buf)
                 s.placement = "current"
             end
             refresh(existing)
+            r:refresh()
             return
         end
         pcall(vim.api.nvim_buf_set_name, buf, canonical)
@@ -781,6 +758,7 @@ function M.read_uri(buf)
         state[buf].win = win
     end
     refresh(buf)
+    r:refresh()
 end
 
 function M.toggle()