tree-sitter/update: rename fetchImpl to updateImpl

  jsonFile = name: val: (formats.json { }).generate name val;

  # implementation of the fetching of repo information from github

  fetchImpl = passArgs "fetchImpl-with-args" {

  # implementation of the updater

  updateImpl = passArgs "updateImpl-with-args" {

      binaries = {

        curl = "${curl}/bin/curl";

        nix-prefetch-git = "${nix-prefetch-git}/bin/nix-prefetch-git";

        ignoredTreeSitterOrgRepos

        ;

    }

    (writers.writePython3 "fetchImpl" {

    (writers.writePython3 "updateImpl" {

        flakeIgnore = ["E501"];

    } ./update_impl.py);

      ${xe}/bin/xe -F -j5 ${script} {}

  '';

  # The output directory in the current source tree.

  # This will depend on your local environment, but that is intentional.

  outputDir = "${toString ./.}/grammars";

  update-all-grammars = writeShellScript "update-all-grammars.sh" ''

    set -euo pipefail

    echo "fetching list of grammars" 1>&2

    treeSitterRepos=$(${fetchImpl} fetch-orga-latest-repos '{"orga": "tree-sitter"}')

    treeSitterRepos=$(${updateImpl} fetch-orga-latest-repos '{"orga": "tree-sitter"}')

    echo "checking the tree-sitter repo list against the grammars we know" 1>&2

    printf '%s' "$treeSitterRepos" | ${fetchImpl} check-tree-sitter-repos '{}'

    printf '%s' "$treeSitterRepos" | ${updateImpl} check-tree-sitter-repos '{}'

    echo "writing files to ${outputDir}" 1>&2

    mkdir -p "${outputDir}"

    ${forEachParallel

        "repos-to-fetch"

        (writeShellScript "fetch-repo" ''

            ${fetchImpl} fetch-repo "$1"

            ${updateImpl} fetch-repo "$1"

        '')

        (lib.mapAttrsToList

          (nixRepoAttrName: attrs: attrs // {

          })

          allGrammars)

    }

    ${fetchImpl} print-all-grammars-nix-file "$(< ${

    ${updateImpl} print-all-grammars-nix-file "$(< ${

        jsonFile "all-grammars.json" {

          allGrammars =

            (lib.mapAttrsToList