update-scripts: Extract the list of all servers from nvim-lspconfig

update-scripts/nvim-lspconfig/default.nix

@@ -0,0 +1,37 @@
+{
+  lib,
+  vimPlugins,
+  neovimUtils,
+  wrapNeovimUnstable,
+  neovim-unwrapped,
+  runCommand,
+  pandoc,
+  python3,
+}:
+let
+  nvimConfig = neovimUtils.makeNeovimConfig {
+    plugins = [
+      {
+        plugin = vimPlugins.nvim-lspconfig;
+        config = null;
+        optional = false;
+      }
+    ];
+  };
+
+  nvim = wrapNeovimUnstable neovim-unwrapped nvimConfig;
+in
+runCommand "lspconfig-servers"
+  {
+    lspconfig = "${vimPlugins.nvim-lspconfig}";
+    nativeBuildInputs = [
+      pandoc
+      python3
+    ];
+  }
+  ''
+    export HOME=$(realpath .)
+    # Generates `lsp.json`
+    ${lib.getExe nvim} -u NONE -E -R --headless +'luafile ${./lspconfig-servers.lua}' +q
+    LUA_FILTER=${./desc-filter.lua} python3 ${./clean-desc.py} "lsp.json" >$out
+  ''