fix(hide): reload buffer list pickers on unhide

Closes #1871
Closes #1896

Author: ibhagwan

lua/fzf-lua/profiles/hide.lua

@@ -1,5 +1,6 @@
 local uv = vim.uv or vim.loop
 local fzf = require("fzf-lua")
+local shell = require "fzf-lua.shell"
 return {
   desc     = "hide interface instead of abort",
   keymap   = {
@@ -82,6 +83,15 @@ return {
         end
         return act
       end, opts.actions)
+      -- Hijack the resize event to reload buffer/tab list on unhide
+      opts.keymap.fzf.resize = "transform:" .. shell.raw_action(function(_, _, _)
+        if opts._unhide_called then
+          opts._unhide_called = nil
+          if opts.__reload_cmd then
+            return string.format("reload:%s", opts.__reload_cmd)
+          end
+        end
+      end, "{q}", opts.debug)
       return opts
     end,
   },

lua/fzf-lua/utils.lua

@@ -797,8 +797,8 @@ function M.fzf_winobj()
   return loadstring("return require'fzf-lua'.win.__SELF()")()
 end
 
-function M.CTX()
-  return loadstring("return require'fzf-lua'.core.CTX()")()
+function M.CTX(...)
+  return loadstring("return require'fzf-lua'.core.CTX(...)")(...)
 end
 
 function M.__CTX()

lua/fzf-lua/win.lua

@@ -1,5 +1,6 @@
 local path = require "fzf-lua.path"
 local utils = require "fzf-lua.utils"
+local libuv = require "fzf-lua.libuv"
 local config = require "fzf-lua.config"
 local actions = require "fzf-lua.actions"
 
@@ -1211,7 +1212,12 @@ end
 function FzfWin.unhide()
   local self = _self
   if not self or not self:hidden() then return end
-  self._o.__CTX = utils.CTX()
+  self._o.__CTX = utils.CTX({ includeBuflist = true })
+  self._o._unhide_called = true
+  -- Send SIGWINCH to to trigger resize in the fzf process
+  -- We will use the trigger to reload necessary buffer lists
+  local pid = fn.jobpid(vim.bo[self._hidden_fzf_bufnr].channel)
+  vim.tbl_map(function(_pid) libuv.process_kill(_pid, 28) end, vim._os_proc_children(pid))
   vim.bo[self._hidden_fzf_bufnr].bufhidden = "wipe"
   self.fzf_bufnr = self._hidden_fzf_bufnr
   self._hidden_fzf_bufnr = nil