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#!/usr/bin/env bash
# This script dispatches invocations transparently to programs instantiated from
# Nix.
#
# To add a new tool, insert it into the case statement below by setting `attr`
# to the key in nixpkgs which represents the program you want to run.
set -ueo pipefail
readonly REPO_ROOT=$(git rev-parse --show-toplevel)
readonly TARGET_TOOL=$(basename $0)
case "${TARGET_TOOL}" in
git-appraise)
attr="thirdParty.gitAppraise"
;;
stylish-haskell)
attr="haskellPackages.stylish-haskell"
;;
terraform)
attr="terraform-gcp"
;;
kontemplate)
attr="kontemplate"
;;
*)
echo "The tool '${TARGET_TOOL}' is currently not installed in this repository."
exit 1
;;
esac
result=$(nix-build --no-out-link --attr "${attr}" "${REPO_ROOT}")
PATH="${result}/bin:$PATH"
exec "${TARGET_TOOL}" "${@}"
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