feat(lockfile): Fire PackerLockfileDone autocmd

Author: EdenEast

README.md

@@ -615,6 +615,7 @@ require knowing when the operations are complete, you can use the following `Use
 
 - `PackerComplete`: Fires after install, update, clean, and sync asynchronous operations finish.
 - `PackerCompileDone`: Fires after compiling (see [the section on compilation](#compiling-lazy-loaders))
+- `PackerLockfileDone`: Fires after lockfile generation (see [the section on lockfile](#lockfile))
 
 ### Using a floating window
 You can configure Packer to use a floating window for command outputs by passing a utility

doc/packer.txt

@@ -563,6 +563,7 @@ use):
 `PackerComplete`       Fires after install, update, clean, and sync
                      asynchronous operations finish.
 `PackerCompileDone`    Fires after compiling (see |packer-lazy-load|)
+`PackerLockfileDone`   Fires after lockfile (see |packer-lockfile|)
 
 ==============================================================================
 API                                            *packer-api*

lua/packer.lua

@@ -431,6 +431,13 @@ packer.on_compile_done = function()
   log.debug 'packer.compile: Complete'
 end
 
+packer.on_lockfile_done = function()
+  local log = require_and_configure 'log'
+
+  vim.cmd [[doautocmd User PackerLockfileDone]]
+  log.debug 'packer.lockfile: Complete'
+end
+
 --- Clean operation:
 -- Finds plugins present in the `packer` package but not in the managed set
 packer.clean = function(results)
@@ -766,7 +773,7 @@ packer.lockfile = function(...)
         log.error(err)
       end)
 
-    packer.on_complete()
+    packer.on_lockfile_done()
   end)()
 end