mirror of
https://github.com/nix-community/nix-direnv.git
synced 2025-12-07 17:41:08 +01:00
use_nix: switch to print-dev-env
This get's rid of pure shell hacks and allows finally to use `shellHook` properly even in the cached version.
This commit is contained in:
Jörg Thalheim
parent
46c42e5983
commit
78aa5db66b
1 changed files with 102 additions and 69 deletions
171
direnvrc
171
direnvrc
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@ -44,35 +44,28 @@ _nix_export_or_unset() {
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}
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_nix_import_env() {
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local env=$1
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local profile_rc=$1
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local old_path=${PATH:-}
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local old_term=${TERM:-__UNSET__}
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local old_shell=${SHELL:-__UNSET__}
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local old_nix_build_top=${NIX_BUILD_TOP:-__UNSET__}
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local old_tmp=${TMP:-__UNSET__}
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local old_tmpdir=${TMPDIR:-__UNSET__}
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local old_ssl_cert_file=${SSL_CERT_FILE:-__UNSET__}
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local old_nix_ssl_cert_file=${NIX_SSL_CERT_FILE:-__UNSET__}
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local old_temp=${TEMP:-__UNSET__}
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local old_tempdir=${TEMPDIR:-__UNSET__}
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local old_xdg_data_dirs=${XDG_DATA_DIRS:-}
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eval "$env"
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# `nix-shell --pure` sets invalid ssl certificate paths
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if [[ "${SSL_CERT_FILE:-}" = /no-cert-file.crt ]]; then
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_nix_export_or_unset SSL_CERT_FILE "$old_ssl_cert_file"
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eval "$(< "$profile_rc")"
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# nix print-env-dev will create a temporary directory and use it a TMPDIR,
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# we cannot rely on this directory beeing not deleted at some point,
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# hence we are just removing it right away.
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if [[ "$NIX_BUILD_TOP" == */nix-shell.* && -d "$NIX_BUILD_TOP" ]]; then
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rmdir "$NIX_BUILD_TOP"
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fi
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if [[ "${NIX_SSL_CERT_FILE:-}" = /no-cert-file.crt ]]; then
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_nix_export_or_unset NIX_SSL_CERT_FILE "$old_nix_ssl_cert_file"
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fi
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export PATH=$PATH${old_path:+":"}$old_path
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_nix_export_or_unset TERM "$old_term"
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_nix_export_or_unset SHELL "$old_shell"
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_nix_export_or_unset NIX_BUILD_TOP "$old_nix_build_top"
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_nix_export_or_unset TMP "$old_tmp"
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_nix_export_or_unset TMPDIR "$old_tmpdir"
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_nix_export_or_unset TEMP "$old_temp"
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_nix_export_or_unset TEMPDIR "$old_tempdir"
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export XDG_DATA_DIRS=$XDG_DATA_DIRS${old_xdg_data_dirs:+":"}$old_xdg_data_dirs
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# misleading since we are in an impure shell now
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export IN_NIX_SHELL=impure
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}
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_nix_add_gcroot() {
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@ -176,28 +169,13 @@ use_flake() {
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export XDG_DATA_DIRS=$XDG_DATA_DIRS${old_xdg_data_dirs:+":"}$old_xdg_data_dirs
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}
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_nix_extract_direnv() {
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local found_direnv
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found_direnv=0
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while read -r line; do
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if [[ "$found_direnv" == "1" ]]; then
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echo "$line"
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break
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elif [[ "$line" == "_____direnv_____" ]]; then
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found_direnv=1
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else
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echo "$line" >&2
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fi
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done
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}
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use_nix() {
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local path layout_dir
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path=$("${NIX_BIN_PREFIX}nix-instantiate" --find-file nixpkgs)
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layout_dir=$(direnv_layout_dir)
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local experimental_flags=()
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if "${NIX_BIN_PREFIX}nix-shell" --extra-experimental-features '' --version 2>/dev/null >&2; then
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experimental_flags+=('--extra-experimental-features' 'nix-command flakes')
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if ! "${NIX_BIN_PREFIX}nix-shell" --extra-experimental-features '' --version 2>/dev/null >&2; then
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log_status "Your nix is too old for nix-direnv. At least nix 2.4 is required"
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return
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fi
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if [[ "${direnv:-}" == "" ]]; then
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@ -223,43 +201,98 @@ use_nix() {
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version="${version_prefix}-${path:11:16}"
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fi
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local cache
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cache="${layout_dir}/cache-${version:-unknown}$(_nix_argsum_suffix "$*")"
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local profile
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local update_drv=0
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if [[ ! -e "$cache"
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|| "$HOME/.direnvrc" -nt "$cache"
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|| .envrc -nt "$cache"
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|| default.nix -nt "$cache"
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|| shell.nix -nt "$cache"
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profile="${layout_dir}/nix-profile-${version:-unknown}$(_nix_argsum_suffix "$*")"
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local profile_rc="${profile}.rc"
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local in_packages=0
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local attribute=
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local packages=""
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local extra_args=()
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local file=
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while [ "$#" -gt 0 ]; do
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i="$1"; shift
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case $i in
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-p|--packages)
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in_packages=1
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;;
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# ignore unsupported arguments
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--command|--run|--exclude)
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shift
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;;
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# ignore unsupported arguments
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--pure|-i|--keep)
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;;
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-I)
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extra_args+=("$i" "$1")
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shift
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;;
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--attr|-A)
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attribute=$1
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shift
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;;
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--option|-o|--arg|--argstr)
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extra_args+=("$i" "$1" "$2")
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shift
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shift
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;;
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-*)
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echo "unknown argument $i"
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return
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;;
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*)
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if [[ $in_packages == 1 ]]; then
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packages+=" $i"
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else
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file=$i
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fi
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;;
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esac
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done
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if [[ ! -e "$profile"
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|| ! -e "$profile_rc"
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|| "$HOME/.direnvrc" -nt "$profile_rc"
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|| .envrc -nt "$profile_rc"
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|| default.nix -nt "$profile_rc"
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|| shell.nix -nt "$profile_rc"
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]];
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then
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local tmp_profile="${layout_dir}/flake-profile.$$"
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[[ -d "$layout_dir" ]] || mkdir -p "$layout_dir"
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local dump_cmd tmp
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dump_cmd="echo _____direnv_____; \"$direnv\" dump bash"
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tmp=$("${NIX_BIN_PREFIX}nix-shell" \
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"${experimental_flags[@]}" \
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--show-trace --pure "$@" --run "$dump_cmd")
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# show original shell hook output
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echo "$tmp" | _nix_extract_direnv >&2 > "$cache"
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update_drv=1
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local tmp_profile_rc
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local extra_args=()
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if [[ $packages != "" ]]; then
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extra_args+=("--expr" "with import <nixpkgs> {}; mkShell { buildInputs = [ $packages ]; }")
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else
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if [[ $file == "" ]]; then
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if [[ -e "shell.nix" ]]; then
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file=./shell.nix
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elif [[ -e "default.nix" ]]; then
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file=./default.nix
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fi
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fi
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if [[ $attribute == "" ]]; then
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extra_args+=(--file "$file")
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else
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extra_args+=(--expr "(import $file).${attribute}")
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fi
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fi
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tmp_profile_rc=$("${NIX_BIN_PREFIX}nix" print-dev-env \
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--extra-experimental-features "nix-command flakes" \
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--profile "$tmp_profile" --impure "${extra_args[@]}")
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drv=$(ls -dl "$tmp_profile")
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drv=${drv#*-> }
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echo "$tmp_profile_rc" > "$profile_rc"
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rm -f "$tmp_profile" "$tmp_profile"*
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_nix_add_gcroot "$drv" "$profile"
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log_status renewed cache
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else
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log_status using cached derivation
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fi
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log_status eval "$cache"
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read -r cache_content < "$cache"
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_nix_import_env "$cache_content"
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# This part is based on https://discourse.nixos.org/t/what-is-the-best-dev-workflow-around-nix-shell/418/4
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if [[ "${out:-}" != "" ]] && (( update_drv )); then
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local drv_link="${layout_dir}/drv" drv
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drv=$("${NIX_BIN_PREFIX}nix" show-derivation "$out" \
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"${experimental_flags[@]}" \
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| grep -E -o -m1 '/nix/store/.*.drv')
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_nix_add_gcroot "$drv" "$drv_link"
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log_status renewed cache and derivation link
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fi
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_nix_import_env "$profile_rc"
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if [[ "$#" == 0 ]]; then
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watch_file default.nix
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