vimPluginsUpdater: init

The nixpkgs documentation mentions how to update out of tree plugins but
one problem is that it requires a nixpkgs clone.
This makes it more convenient.
I've had the need to generate vim plugins and lua overlays for other
projects unrelated to nix and this will make updates easier (aka just
run `nix run nixpkgs#vimPluginsUpdater -- --proc=1` or with the legacy commands:
`nix-shell -p vimPluginsUpdater  --run vim-plugins-updater`.

I added an optional "nixpkgs" argument to command line parser, which is the path
towards a nixpkgs checkout. By default the current folder.

update-luarocks-packages: format with black

8 files changed, 202 insertions, 134 deletions

diff --git a/doc/languages-frameworks/vim.section.md b/doc/languages-frameworks/vim.section.md
index 5e25c1ed423e1..1f3727f552c80 100644
--- a/doc/languages-frameworks/vim.section.md
+++ b/doc/languages-frameworks/vim.section.md
@@ -212,9 +212,9 @@ Note: this is not possible anymore for Neovim.
 
 ## Adding new plugins to nixpkgs {#adding-new-plugins-to-nixpkgs}
 
-Nix expressions for Vim plugins are stored in [pkgs/applications/editors/vim/plugins](https://github.com/NixOS/nixpkgs/tree/master/pkgs/applications/editors/vim/plugins). For the vast majority of plugins, Nix expressions are automatically generated by running [`./update.py`](https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/editors/vim/plugins/update.py). This creates a [generated.nix](https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/editors/vim/plugins/generated.nix) file based on the plugins listed in [vim-plugin-names](https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/editors/vim/plugins/vim-plugin-names).
+Nix expressions for Vim plugins are stored in [pkgs/applications/editors/vim/plugins](https://github.com/NixOS/nixpkgs/tree/master/pkgs/applications/editors/vim/plugins). For the vast majority of plugins, Nix expressions are automatically generated by running [`nix-shell -p vimPluginsUpdater --run vim-plugins-updater`](https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/editors/vim/plugins/updater.nix). This creates a [generated.nix](https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/editors/vim/plugins/generated.nix) file based on the plugins listed in [vim-plugin-names](https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/editors/vim/plugins/vim-plugin-names).
 
-After running `./update.py`, if nvim-treesitter received an update, also run [`nvim-treesitter/update.py`](https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/editors/vim/plugins/update.py) to update the tree sitter grammars for `nvim-treesitter`.
+After running the updater, if nvim-treesitter received an update, also run [`nvim-treesitter/update.py`](https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/editors/vim/plugins/update.py) to update the tree sitter grammars for `nvim-treesitter`.
 
 Some plugins require overrides in order to function properly. Overrides are placed in [overrides.nix](https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/editors/vim/plugins/overrides.nix). Overrides are most often required when a plugin requires some dependencies, or extra steps are required during the build process. For example `deoplete-fish` requires both `deoplete-nvim` and `vim-fish`, and so the following override was added:
 
@@ -241,7 +241,8 @@ GITHUB_API_TOKEN=my_token ./pkgs/applications/editors/vim/plugins/update.py
 Alternatively, set the number of processes to a lower count to avoid rate-limiting.
 
 ```sh
-./pkgs/applications/editors/vim/plugins/update.py --proc 1
+
+nix-shell -p vimPluginsUpdater --run 'vim-plugins-updater --proc 1'
 ```
 
 ## How to maintain an out-of-tree overlay of vim plugins ? {#vim-out-of-tree-overlays}
@@ -250,7 +251,7 @@ You can use the updater script to generate basic packages out of a custom vim
 plugin list:
 
 ```
-pkgs/applications/editors/vim/plugins/update.py -i vim-plugin-names -o generated.nix --no-commit
+nix-shell -p vimPluginsUpdater --run vim-plugins-updater -i vim-plugin-names -o generated.nix --no-commit
 ```
 
 with the contents of `vim-plugin-names` being for example:
@@ -264,7 +265,7 @@ You can then reference the generated vim plugins via:
 
 ```nix
 myVimPlugins = pkgs.vimPlugins.extend (
-  (pkgs.callPackage generated.nix {})
+  (pkgs.callPackage ./generated.nix {})
 );
 ```
 
diff --git a/maintainers/scripts/pluginupdate.py b/maintainers/scripts/pluginupdate.py
index 6a607eb624803..18b354f0be9c6 100644
--- a/maintainers/scripts/pluginupdate.py
+++ b/maintainers/scripts/pluginupdate.py
@@ -321,8 +321,14 @@ def load_plugins_from_csv(
     return plugins
 
 
-def run_nix_expr(expr):
-    with CleanEnvironment() as nix_path:
+
+def run_nix_expr(expr, nixpkgs: str):
+    '''
+    :param expr nix expression to fetch current plugins
+    :param nixpkgs Path towards a nixpkgs checkout
+    '''
+    # local_pkgs = str(Path(__file__).parent.parent.parent)
+    with CleanEnvironment(nixpkgs) as nix_path:
         cmd = [
             "nix",
             "eval",
@@ -396,9 +402,9 @@ class Editor:
         """CSV spec"""
         print("the update member function should be overriden in subclasses")
 
-    def get_current_plugins(self) -> List[Plugin]:
+    def get_current_plugins(self, nixpkgs) -> List[Plugin]:
         """To fill the cache"""
-        data = run_nix_expr(self.get_plugins)
+        data = run_nix_expr(self.get_plugins, nixpkgs)
         plugins = []
         for name, attr in data.items():
             p = Plugin(name, attr["rev"], attr["submodules"], attr["sha256"])
@@ -414,7 +420,7 @@ class Editor:
         raise NotImplementedError()
 
     def get_update(self, input_file: str, outfile: str, config: FetchConfig):
-        cache: Cache = Cache(self.get_current_plugins(), self.cache_file)
+        cache: Cache = Cache(self.get_current_plugins(self.nixpkgs), self.cache_file)
         _prefetch = functools.partial(prefetch, cache=cache)
 
         def update() -> dict:
@@ -454,6 +460,12 @@ class Editor:
             ),
         )
         common.add_argument(
+            "--nixpkgs",
+            type=str,
+            default=os.getcwd(),
+            help="Adjust log level",
+        )
+        common.add_argument(
             "--input-names",
             "-i",
             dest="input_file",
@@ -541,22 +553,27 @@ class Editor:
         command = args.command or "update"
         log.setLevel(LOG_LEVELS[args.debug])
         log.info("Chose to run command: %s", command)
+        self.nixpkgs = args.nixpkgs
 
-        if not args.no_commit:
-            self.nixpkgs_repo = git.Repo(self.root, search_parent_directories=True)
+        self.nixpkgs_repo = git.Repo(args.nixpkgs, search_parent_directories=True)
 
         getattr(self, command)(args)
 
 
 class CleanEnvironment(object):
+    def __init__(self, nixpkgs):
+        self.local_pkgs = nixpkgs
+
     def __enter__(self) -> str:
-        self.old_environ = os.environ.copy()
+        """
         local_pkgs = str(Path(__file__).parent.parent.parent)
+        """
+        self.old_environ = os.environ.copy()
         self.empty_config = NamedTemporaryFile()
         self.empty_config.write(b"{}")
         self.empty_config.flush()
-        os.environ["NIXPKGS_CONFIG"] = self.empty_config.name
-        return f"localpkgs={local_pkgs}"
+        # os.environ["NIXPKGS_CONFIG"] = self.empty_config.name
+        return f"localpkgs={self.local_pkgs}"
 
     def __exit__(self, exc_type: Any, exc_value: Any, traceback: Any) -> None:
         os.environ.update(self.old_environ)
@@ -758,7 +775,8 @@ def commit(repo: git.Repo, message: str, files: List[Path]) -> None:
 
 
 def update_plugins(editor: Editor, args):
-    """The main entry function of this module. All input arguments are grouped in the `Editor`."""
+    """The main entry function of this module.
+    All input arguments are grouped in the `Editor`."""
 
     log.info("Start updating plugins")
     fetch_config = FetchConfig(args.proc, args.github_token)
diff --git a/maintainers/scripts/update-luarocks-packages b/maintainers/scripts/update-luarocks-packages
index 791cd8a1d89d9..32c2b44260b32 100755
--- a/maintainers/scripts/update-luarocks-packages
+++ b/maintainers/scripts/update-luarocks-packages
@@ -2,11 +2,11 @@
 #!nix-shell update-luarocks-shell.nix -i python3
 
 # format:
-# $ nix run nixpkgs.python3Packages.black -c black update.py
+# $ nix run nixpkgs#python3Packages.black -- update.py
 # type-check:
-# $ nix run nixpkgs.python3Packages.mypy -c mypy update.py
+# $ nix run nixpkgs#python3Packages.mypy -- update.py
 # linted:
-# $ nix run nixpkgs.python3Packages.flake8 -c flake8 --ignore E501,E265,E402 update.py
+# $ nix run nixpkgs#python3Packages.flake8 -- --ignore E501,E265,E402 update.py
 
 import inspect
 import os
@@ -25,14 +25,14 @@ from pathlib import Path
 log = logging.getLogger()
 log.addHandler(logging.StreamHandler())
 
-ROOT = Path(os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe())))).parent.parent # type: ignore
+ROOT = Path(os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe())))).parent.parent  # type: ignore
 import pluginupdate
 from pluginupdate import update_plugins, FetchConfig, CleanEnvironment
 
-PKG_LIST="maintainers/scripts/luarocks-packages.csv"
-TMP_FILE="$(mktemp)"
-GENERATED_NIXFILE="pkgs/development/lua-modules/generated-packages.nix"
-LUAROCKS_CONFIG="maintainers/scripts/luarocks-config.lua"
+PKG_LIST = "maintainers/scripts/luarocks-packages.csv"
+TMP_FILE = "$(mktemp)"
+GENERATED_NIXFILE = "pkgs/development/lua-modules/generated-packages.nix"
+LUAROCKS_CONFIG = "maintainers/scripts/luarocks-config.lua"
 
 HEADER = """/* {GENERATED_NIXFILE} is an auto-generated file -- DO NOT EDIT!
 Regenerate it with:
@@ -40,36 +40,40 @@ nixpkgs$ ./maintainers/scripts/update-luarocks-packages
 
 You can customize the generated packages in pkgs/development/lua-modules/overrides.nix
 */
-""".format(GENERATED_NIXFILE=GENERATED_NIXFILE)
+""".format(
+    GENERATED_NIXFILE=GENERATED_NIXFILE
+)
 
-FOOTER="""
+FOOTER = """
 }
 /* GENERATED - do not edit this file */
 """
 
+
 @dataclass
 class LuaPlugin:
     name: str
-    '''Name of the plugin, as seen on luarocks.org'''
+    """Name of the plugin, as seen on luarocks.org"""
     src: str
-    '''address to the git repository'''
+    """address to the git repository"""
     ref: Optional[str]
-    '''git reference (branch name/tag)'''
+    """git reference (branch name/tag)"""
     version: Optional[str]
-    '''Set it to pin a package '''
+    """Set it to pin a package """
     server: Optional[str]
-    '''luarocks.org registers packages under different manifests.
+    """luarocks.org registers packages under different manifests.
     Its value can be 'http://luarocks.org/dev'
-    '''
+    """
     luaversion: Optional[str]
-    '''Attribue of the lua interpreter if a package is available only for a specific lua version'''
+    """Attribue of the lua interpreter if a package is available only for a specific lua version"""
     maintainers: Optional[str]
-    ''' Optional string listing maintainers separated by spaces'''
+    """ Optional string listing maintainers separated by spaces"""
 
     @property
     def normalized_name(self) -> str:
         return self.name.replace(".", "-")
 
+
 # rename Editor to LangUpdate/ EcosystemUpdater
 class LuaEditor(pluginupdate.Editor):
     def get_current_plugins(self):
@@ -77,11 +81,13 @@ class LuaEditor(pluginupdate.Editor):
 
     def load_plugin_spec(self, input_file) -> List[LuaPlugin]:
         luaPackages = []
-        csvfilename=input_file
+        csvfilename = input_file
         log.info("Loading package descriptions from %s", csvfilename)
 
-        with open(csvfilename, newline='') as csvfile:
-            reader = csv.DictReader(csvfile,)
+        with open(csvfilename, newline="") as csvfile:
+            reader = csv.DictReader(
+                csvfile,
+            )
             for row in reader:
                 # name,server,version,luaversion,maintainers
                 plugin = LuaPlugin(**row)
@@ -91,23 +97,19 @@ class LuaEditor(pluginupdate.Editor):
     def update(self, args):
         update_plugins(self, args)
 
-    def generate_nix(
-        self,
-        results: List[Tuple[LuaPlugin, str]],
-        outfilename: str
-        ):
-
+    def generate_nix(self, results: List[Tuple[LuaPlugin, str]], outfilename: str):
         with tempfile.NamedTemporaryFile("w+") as f:
             f.write(HEADER)
             header2 = textwrap.dedent(
-            # header2 = inspect.cleandoc(
-            """
+                # header2 = inspect.cleandoc(
+                """
                 { self, stdenv, lib, fetchurl, fetchgit, callPackage, ... } @ args:
                 final: prev:
                 {
-            """)
+            """
+            )
             f.write(header2)
-            for (plugin, nix_expr) in results:
+            for plugin, nix_expr in results:
                 f.write(f"{plugin.normalized_name} = {nix_expr}")
             f.write(FOOTER)
             f.flush()
@@ -156,19 +158,20 @@ class LuaEditor(pluginupdate.Editor):
         #         luaPackages.append(plugin)
         pass
 
+
 def generate_pkg_nix(plug: LuaPlugin):
-    '''
+    """
     Generate nix expression for a luarocks package
     Our cache key associates "p.name-p.version" to its rockspec
-    '''
+    """
     log.debug("Generating nix expression for %s", plug.name)
     custom_env = os.environ.copy()
-    custom_env['LUAROCKS_CONFIG'] = LUAROCKS_CONFIG
+    custom_env["LUAROCKS_CONFIG"] = LUAROCKS_CONFIG
 
     # we add --dev else luarocks wont find all the "scm" (=dev) versions of the
     # packages
-	# , "--dev"
-    cmd = [ "luarocks", "nix" ]
+    # , "--dev"
+    cmd = ["luarocks", "nix"]
 
     if plug.maintainers:
         cmd.append(f"--maintainers={plug.maintainers}")
@@ -176,7 +179,10 @@ def generate_pkg_nix(plug: LuaPlugin):
     # if plug.server == "src":
     if plug.src != "":
         if plug.src is None:
-            msg = "src must be set when 'version' is set to \"src\" for package %s" % plug.name
+            msg = (
+                "src must be set when 'version' is set to \"src\" for package %s"
+                % plug.name
+            )
             log.error(msg)
             raise RuntimeError(msg)
         log.debug("Updating from source %s", plug.src)
@@ -185,7 +191,6 @@ def generate_pkg_nix(plug: LuaPlugin):
     else:
         cmd.append(plug.name)
         if plug.version and plug.version != "src":
-
             cmd.append(plug.version)
 
     if plug.server != "src" and plug.server:
@@ -194,23 +199,26 @@ def generate_pkg_nix(plug: LuaPlugin):
     if plug.luaversion:
         cmd.append(f"--lua-version={plug.luaversion}")
 
-    log.debug("running %s", ' '.join(cmd))
+    log.debug("running %s", " ".join(cmd))
 
     output = subprocess.check_output(cmd, env=custom_env, text=True)
     output = "callPackage(" + output.strip() + ") {};\n\n"
     return (plug, output)
 
-def main():
 
-    editor = LuaEditor("lua", ROOT, '',
-        default_in = ROOT.joinpath(PKG_LIST),
-        default_out = ROOT.joinpath(GENERATED_NIXFILE)
-        )
+def main():
+    editor = LuaEditor(
+        "lua",
+        ROOT,
+        "",
+        default_in=ROOT.joinpath(PKG_LIST),
+        default_out=ROOT.joinpath(GENERATED_NIXFILE),
+    )
 
     editor.run()
 
-if __name__ == "__main__":
 
+if __name__ == "__main__":
     main()
 
 #  vim: set ft=python noet fdm=manual fenc=utf-8 ff=unix sts=0 sw=4 ts=4 :
diff --git a/pkgs/applications/editors/vim/plugins/nvim-treesitter/update.py b/pkgs/applications/editors/vim/plugins/nvim-treesitter/update.py
index bbacc6959c255..37414b073538a 100755
--- a/pkgs/applications/editors/vim/plugins/nvim-treesitter/update.py
+++ b/pkgs/applications/editors/vim/plugins/nvim-treesitter/update.py
@@ -7,8 +7,6 @@ from concurrent.futures import ThreadPoolExecutor
 from os import environ
 from os.path import dirname, join
 
-lockfile = json.load(open(join(environ["NVIM_TREESITTER"], "lockfile.json")))
-
 configs = json.loads(
     subprocess.check_output(
         [
@@ -58,20 +56,26 @@ def generate_grammar(item):
     return generated
 
 
-generated_file = """# generated by pkgs/applications/editors/vim/plugins/nvim-treesitter/update.py
+def update_grammars(lockfile: str):
 
-{ buildGrammar, """
+    generated_file = """# generated by pkgs/applications/editors/vim/plugins/nvim-treesitter/update.py
 
-generated_file += subprocess.check_output(["nurl", "-Ls", ", "], text=True)
+    { buildGrammar, """
 
-generated_file += """ }:
+    generated_file += subprocess.check_output(["nurl", "-Ls", ", "], text=True)
 
-{
-"""
+    generated_file += """ }:
+
+    {
+    """
+    for generated in ThreadPoolExecutor().map(generate_grammar, lockfile.items()):
+        generated_file += generated
+        generated_file += "}\n"
+        generated_file += "}\n"
 
-for generated in ThreadPoolExecutor().map(generate_grammar, lockfile.items()):
-    generated_file += generated
+    open(join(dirname(__file__), "generated.nix"), "w").write(generated_file)
 
-generated_file += "}\n"
 
-open(join(dirname(__file__), "generated.nix"), "w").write(generated_file)
+if __name__ == "__main__":
+    # TODO add lockfile
+    update_grammars()
diff --git a/pkgs/applications/editors/vim/plugins/update-shell.nix b/pkgs/applications/editors/vim/plugins/update-shell.nix
deleted file mode 100644
index eae7db7f53ec0..0000000000000
--- a/pkgs/applications/editors/vim/plugins/update-shell.nix
+++ /dev/null
@@ -1,16 +0,0 @@
-{ pkgs ? import ../../../../.. { } }:
-
-# Ideally, pkgs points to default.nix file of Nixpkgs official tree
-with pkgs;
-let
-  pyEnv = python3.withPackages (ps: [ ps.gitpython ]);
-in
-
-mkShell {
-  packages = [
-    bash
-    pyEnv
-    nix
-    nix-prefetch-scripts
-  ];
-}
diff --git a/pkgs/applications/editors/vim/plugins/update.py b/pkgs/applications/editors/vim/plugins/update.py
index 97e0dda3b8dce..9770b27252cd8 100755
--- a/pkgs/applications/editors/vim/plugins/update.py
+++ b/pkgs/applications/editors/vim/plugins/update.py
@@ -1,32 +1,31 @@
-#!/usr/bin/env nix-shell
-#!nix-shell update-shell.nix -i python3
-
+#!/usr/bin/env python
 
+# run with:
+# $ nix run .\#vimPluginsUpdater
 # format:
-# $ nix run nixpkgs.python3Packages.black -c black update.py
+# $ nix run nixpkgs#python3Packages.black -- update.py
 # type-check:
-# $ nix run nixpkgs.python3Packages.mypy -c mypy update.py
+# $ nix run nixpkgs#python3Packages.mypy -- update.py
 # linted:
-# $ nix run nixpkgs.python3Packages.flake8 -c flake8 --ignore E501,E265,E402 update.py
+# $ nix run nixpkgs#python3Packages.flake8 -- --ignore E501,E265,E402 update.py
 
-# If you see `HTTP Error 429: too many requests` errors while running this script,
-# refer to:
+# If you see `HTTP Error 429: too many requests` errors while running this
+# script, refer to:
 #
 # https://github.com/NixOS/nixpkgs/blob/master/doc/languages-frameworks/vim.section.md#updating-plugins-in-nixpkgs-updating-plugins-in-nixpkgs
 #
-# (or the equivalent file /doc/languages-frameworks/vim.section.md from Nixpkgs master tree).
+# (or the equivalent file /doc/languages-frameworks/vim.section.md
+# from Nixpkgs master tree).
 #
 
 import inspect
 import os
-import sys
 import logging
-import subprocess
 import textwrap
+import json
 from typing import List, Tuple
 from pathlib import Path
 
-import git
 
 log = logging.getLogger()
 
@@ -37,34 +36,18 @@ log.addHandler(sh)
 
 # Import plugin update library from maintainers/scripts/pluginupdate.py
 ROOT = Path(os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe()))))
-# Ideally, ROOT.(parent^5) points to root of Nixpkgs official tree
-sys.path.insert(
-    0, os.path.join(ROOT.parent.parent.parent.parent.parent, "maintainers", "scripts")
-)
 import pluginupdate
+import importlib
 from pluginupdate import run_nix_expr, PluginDesc
-nvim_treesitter = importlib.import_module("treesitter")
-
+from treesitter import update_grammars
 
-GET_PLUGINS_LUA = """
-with import <localpkgs> {};
-lib.attrNames lua51Packages"""
 
 HEADER = (
     "# GENERATED by ./pkgs/applications/editors/vim/plugins/update.py. Do not edit!"
 )
 
-
-def isNeovimPlugin(plug: pluginupdate.Plugin) -> bool:
-    """
-    Whether it's a neovim-only plugin
-    We can check if it's available in lua packages
-    """
-    global luaPlugins
-    if plug.normalized_name in luaPlugins:
-        log.debug("%s is a neovim plugin", plug)
-        return True
-    return False
+NVIM_TREESITTER_GENERATED_NIX = \
+    "pkgs/applications/editors/vim/plugins/nvim-treesitter/generated.nix"
 
 
 class VimEditor(pluginupdate.Editor):
@@ -75,7 +58,8 @@ class VimEditor(pluginupdate.Editor):
     ):
         sorted_plugins = sorted(plugins, key=lambda v: v[0].name.lower())
         nvim_treesitter_rev = pluginupdate.run_nix_expr(
-            "(import <localpkgs> { }).vimPlugins.nvim-treesitter.src.rev"
+            "(import <localpkgs> { }).vimPlugins.nvim-treesitter.src.rev",
+            self.nixpkgs
         )
 
         with open(outfile, "w+") as f:
@@ -94,16 +78,32 @@ class VimEditor(pluginupdate.Editor):
                 content = self.plugin2nix(pdesc, plugin)
                 f.write(content)
                 if (
-                    plugin.name == "nvim-treesitter"
-                    and plugin.commit != nvim_treesitter_rev
+                    plugin.name == "nvim-treesitter" and plugin.commit != nvim_treesitter_rev
                 ):
                     self.nvim_treesitter_updated = True
             f.write("\n}\n")
         print(f"updated {outfile}")
 
     def plugin2nix(self, pdesc: PluginDesc, plugin: pluginupdate.Plugin) -> str:
+        GET_PLUGINS_LUA = """
+        with import <localpkgs> {};
+        lib.attrNames lua51Packages"""
+        luaPlugins = run_nix_expr(GET_PLUGINS_LUA, self.nixpkgs)
+
         repo = pdesc.repo
-        isNeovim = isNeovimPlugin(plugin)
+
+        def _isNeovimPlugin(plug: pluginupdate.Plugin) -> bool:
+            """
+            Whether it's a neovim-only plugin
+            We can check if it's available in lua packages
+            """
+            # global luaPlugins
+            if plug.normalized_name in luaPlugins:
+                log.debug("%s is a neovim plugin", plug)
+                return True
+            return False
+
+        isNeovim = _isNeovimPlugin(plugin)
 
         content = f"  {plugin.normalized_name} = "
         src_nix = repo.as_nix(plugin)
@@ -129,16 +129,14 @@ class VimEditor(pluginupdate.Editor):
         if self.nvim_treesitter_updated:
             print("updating nvim-treesitter grammars")
             nvim_treesitter_dir = ROOT.joinpath("nvim-treesitter")
-            # subprocess.check_call([nvim_treesitter_dir.joinpath("update.py")])
-            nvim_treesitter.update_grammars()
+            lockfile = json.load(open(args.nixpkgs.join(NVIM_TREESITTER_GENERATED_FILE, "lockfile.json")))
+
+            nvim_treesitter.update_grammars(lockfile)
 
             if self.nixpkgs_repo:
                 index = self.nixpkgs_repo.index
                 for diff in index.diff(None):
-                    if (
-                        diff.a_path
-                        == "pkgs/applications/editors/vim/plugins/nvim-treesitter/generated.nix"
-                    ):
+                    if diff.a_path == NVIM_TREESITTER_GENERATED_NIX:
                         msg = "vimPlugins.nvim-treesitter: update grammars"
                         print(f"committing to nixpkgs: {msg}")
                         index.add([str(nvim_treesitter_dir.joinpath("generated.nix"))])
@@ -148,12 +146,13 @@ class VimEditor(pluginupdate.Editor):
 
 
 def main():
+
     global luaPlugins
-    luaPlugins = run_nix_expr(GET_PLUGINS_LUA)
 
-    with open(f"{ROOT}/get-plugins.nix") as f:
+    log.debug(f"Loading from {ROOT}/../get-plugins.nix")
+    with open(f"{ROOT}/../get-plugins.nix") as f:
         GET_PLUGINS = f.read()
-    editor = VimEditor("vim", ROOT, GET_PLUGINS)
+    editor = VimEditor("vim", Path("pkgs/applications/editors/vim/plugins"), GET_PLUGINS)
     editor.run()
 
 
diff --git a/pkgs/applications/editors/vim/plugins/updater.nix b/pkgs/applications/editors/vim/plugins/updater.nix
new file mode 100644
index 0000000000000..e82650a040f23
--- /dev/null
+++ b/pkgs/applications/editors/vim/plugins/updater.nix
@@ -0,0 +1,47 @@
+{ buildPythonApplication
+, nix
+, makeWrapper
+, python3Packages
+, lib
+
+# optional
+, vimPlugins
+, neovim
+}:
+let
+  my_neovim = neovim.override {
+    configure.packages.all.start = [ vimPlugins.nvim-treesitter ];
+  };
+
+in
+buildPythonApplication {
+  format = "other";
+  pname = "vim-plugins-updater";
+  version = "0.1";
+
+  nativeBuildInputs = [
+    makeWrapper
+    python3Packages.wrapPython
+  ];
+
+  pythonPath = [
+    python3Packages.gitpython
+  ];
+
+  dontUnpack = true;
+
+  installPhase = ''
+    mkdir -p $out/bin $out/lib
+    cp ${./update.py} $out/bin/vim-plugins-updater
+    cp ${./get-plugins.nix} $out/get-plugins.nix
+    cp ${./nvim-treesitter/update.py} $out/lib/treesitter.py
+    cp ${../../../../../maintainers/scripts/pluginupdate.py} $out/lib/pluginupdate.py
+
+    # wrap python scripts
+    makeWrapperArgs+=( --prefix PATH : "${lib.makeBinPath [ nix my_neovim ]}" --prefix PYTHONPATH : "$out/lib" )
+    wrapPythonPrograms
+  '';
+
+  meta.mainProgram = "vim-plugins-updater";
+}
+
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 8a6e84c60c5ee..24ffd064ada26 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -126,6 +126,13 @@ with pkgs;
 
   common-updater-scripts = callPackage ../common-updater/scripts.nix { };
 
+  # vimPluginsUpdater = callPackage ../applications/editors/vim/plugins/updater.nix {
+  #   inherit (writers) writePython3Bin;
+  # };
+  vimPluginsUpdater = callPackage ../applications/editors/vim/plugins/updater.nix {
+    inherit (python3Packages) buildPythonApplication ;
+  };
+
   genericUpdater = callPackage ../common-updater/generic-updater.nix { };
 
   _experimental-update-script-combinators = callPackage ../common-updater/combinators.nix { };