fix(blame): get gh blame info asynchronously

lua/gitsigns/actions/blame_line.lua

@@ -95,8 +95,9 @@ end
 --- @param result Gitsigns.BlameInfoPublic
 --- @param repo Gitsigns.Repo
 --- @param fileformat string
+--- @param with_gh boolean
 --- @return Gitsigns.LineSpec[]
-local function create_blame_linespec(full, result, repo, fileformat)
+local function create_blame_linespec(full, result, repo, fileformat, with_gh)
   local is_committed = result.sha and tonumber('0x' .. result.sha) ~= 0
 
   if not is_committed then
@@ -106,7 +107,7 @@ local function create_blame_linespec(full, result, repo, fileformat)
   end
 
   local gh --- @module 'gitsigns.gh'?
-  if config.gh then
+  if config.gh and with_gh then
     gh = require('gitsigns.gh')
   end
 
@@ -180,11 +181,22 @@ return function(opts)
 
   local result = util.convert_blame_info(assert(info))
 
-  local blame_linespec = create_blame_linespec(opts.full, result, bcache.git_obj.repo, fileformat)
+  local blame_linespec =
+    create_blame_linespec(opts.full, result, bcache.git_obj.repo, fileformat, false)
 
   if not bcache:schedule() then
     return
   end
 
-  popup.create(blame_linespec, config.preview_config, 'blame')
+  local popup_winid, popup_bufnr = popup.create(blame_linespec, config.preview_config, 'blame')
+
+  blame_linespec = create_blame_linespec(opts.full, result, bcache.git_obj.repo, fileformat, true)
+
+  if not bcache:schedule() then
+    return
+  end
+
+  if vim.api.nvim_win_is_valid(popup_winid) and vim.api.nvim_buf_is_valid(popup_bufnr) then
+    popup.update(popup_winid, popup_bufnr, blame_linespec, config.preview_config)
+  end
 end

lua/gitsigns/popup.lua

@@ -140,25 +140,15 @@ end
 
 local ns = api.nvim_create_namespace('gitsigns_popup')
 
---- @param lines string[]
---- @param highlights Gitsigns.HlMark[]
---- @return integer bufnr
-local function create_buf(lines, highlights)
-  local ts = vim.bo.tabstop
-  local bufnr = api.nvim_create_buf(false, true)
-  assert(bufnr ~= 0, 'Failed to create buffer')
-
-  vim.bo[bufnr].bufhidden = 'wipe'
-
+--- @param bufnr integer
+--- @param lines_spec Gitsigns.LineSpec[]
+local function update_buf(bufnr, lines_spec)
+  local lines, highlights = partition_linesspec(lines_spec)
   -- In case nvim was opened with '-M'
   vim.bo[bufnr].modifiable = true
   api.nvim_buf_set_lines(bufnr, 0, -1, true, lines)
   vim.bo[bufnr].modifiable = false
 
-  -- Set tabstop before calculating the buffer width so that the correct width
-  -- is calculated
-  vim.bo[bufnr].tabstop = ts
-
   for _, hl in ipairs(highlights) do
     local ok, err = pcall(api.nvim_buf_set_extmark, bufnr, ns, hl.start_row, hl.start_col or 0, {
       hl_group = hl.hl_group,
@@ -171,10 +161,40 @@ local function create_buf(lines, highlights)
       error(vim.inspect(hl) .. '\n' .. err)
     end
   end
+end
+
+--- @param lines_spec Gitsigns.LineSpec[]
+--- @return integer bufnr
+local function create_buf(lines_spec)
+  local ts = vim.bo.tabstop
+  local bufnr = api.nvim_create_buf(false, true)
+  assert(bufnr ~= 0, 'Failed to create buffer')
+
+  vim.bo[bufnr].bufhidden = 'wipe'
+
+  -- Set tabstop before calculating the buffer width so that the correct width
+  -- is calculated
+  vim.bo[bufnr].tabstop = ts
+
+  update_buf(bufnr, lines_spec)
 
   return bufnr
 end
 
+--- @param winid integer
+--- @param bufnr integer
+--- @param opts vim.api.keyset.win_config
+local function update_win(winid, bufnr, opts)
+  local lines = api.nvim_buf_get_lines(bufnr, 0, -1, true)
+  local width = opts.width or bufnr_calc_width(bufnr, lines)
+  local height = opts.height or #lines
+  api.nvim_win_set_width(winid, width)
+  api.nvim_win_set_height(winid, height)
+  if not opts.height then
+    expand_height(winid, #lines, opts.border)
+  end
+end
+
 --- @param bufnr integer
 --- @param opts vim.api.keyset.win_config
 --- @param id? string|true
@@ -259,12 +279,20 @@ end
 --- @param id? string
 --- @return integer winid, integer bufnr
 function M.create(lines_spec, opts, id)
-  local lines, highlights = partition_linesspec(lines_spec)
-  local bufnr = create_buf(lines, highlights)
+  local bufnr = create_buf(lines_spec)
   local winid = create_win(bufnr, opts, id)
   return winid, bufnr
 end
 
+--- @param winid integer
+--- @param bufnr integer
+--- @param lines_spec Gitsigns.LineSpec[]
+--- @param opts vim.api.keyset.win_config
+function M.update(winid, bufnr, lines_spec, opts)
+  update_buf(bufnr, lines_spec)
+  update_win(winid, bufnr, opts)
+end
+
 --- @param id string
 --- @return integer? winid
 function M.is_open(id)