mirror of
https://github.com/nix-community/nix-direnv.git
synced 2025-12-24 01:41:20 +01:00
280 lines
7.8 KiB
Text
280 lines
7.8 KiB
Text
# shellcheck shell=bash
|
|
|
|
# Usage: nix_direnv_version <version_at_least>
|
|
#
|
|
# Checks that the nix-direnv version is at least as old as <version_at_least>.
|
|
nix_direnv_version() {
|
|
declare major='1' minor='5' patch='0' # UPDATE(nix-direnv version)
|
|
|
|
[[ $1 =~ ^([^+-.]*)(\.?)([^+-.]*)(\.?)([^+-]*)(-?)([^+]*)(\+?)(.*)$ ]]
|
|
declare -a ver; ver=("${BASH_REMATCH[@]:1}")
|
|
|
|
if [[ ( ${ver[0]} != +([0-9]) ) \
|
|
|| ( ${ver[1]} == '.' && ${ver[2]} != +([0-9]) ) \
|
|
|| ( ${ver[3]} == '.' && ${ver[4]} != +([0-9]) ) \
|
|
|| ( ${ver[5]} == '-' && ${ver[6]} != +([0-9A-Za-z-])*(.+([0-9A-Za-z-])) ) \
|
|
|| ( ${ver[7]} == '+' && ${ver[8]} != +([0-9A-Za-z-])*(.+([0-9A-Za-z-])) ) \
|
|
|| ( ( -n ${ver[5]} || -n ${ver[7]} ) && ( -z ${ver[2]} || -z ${ver[4]} ) ) \
|
|
]]; then
|
|
printf '%s\n' "nix-direnv: error v$1 is not a valid semver version" >&2
|
|
return 1
|
|
fi
|
|
|
|
if [[ ( ${ver[0]} -gt $major ) \
|
|
|| ( ${ver[2]:=0} -gt $minor ) \
|
|
|| ( ${ver[4]:=0} -gt $patch ) \
|
|
]]; then
|
|
printf '%s\n' "nix-direnv: error current version v$major.$minor.$patch is older than the desired version v$1" >&2
|
|
return 1
|
|
fi
|
|
}
|
|
|
|
if [[ -z ${NIX_BIN_PREFIX:-} ]]; then
|
|
NIX_BIN_PREFIX=$(command -v nix-shell)
|
|
NIX_BIN_PREFIX="${NIX_BIN_PREFIX%/*}/"
|
|
fi
|
|
|
|
_nix_export_or_unset() {
|
|
local key=$1 value=$2
|
|
if [[ "$value" == __UNSET__ ]]; then
|
|
unset "$key"
|
|
else
|
|
export "$key=$value"
|
|
fi
|
|
}
|
|
|
|
_nix_import_env() {
|
|
local profile_rc=$1
|
|
|
|
local old_nix_build_top=${NIX_BUILD_TOP:-__UNSET__}
|
|
local old_tmp=${TMP:-__UNSET__}
|
|
local old_tmpdir=${TMPDIR:-__UNSET__}
|
|
local old_temp=${TEMP:-__UNSET__}
|
|
local old_tempdir=${TEMPDIR:-__UNSET__}
|
|
local old_xdg_data_dirs=${XDG_DATA_DIRS:-}
|
|
eval "$(< "$profile_rc")"
|
|
# nix print-env-dev will create a temporary directory and use it a TMPDIR,
|
|
# we cannot rely on this directory beeing not deleted at some point,
|
|
# hence we are just removing it right away.
|
|
if [[ "$NIX_BUILD_TOP" == */nix-shell.* && -d "$NIX_BUILD_TOP" ]]; then
|
|
rmdir "$NIX_BUILD_TOP"
|
|
fi
|
|
|
|
_nix_export_or_unset NIX_BUILD_TOP "$old_nix_build_top"
|
|
_nix_export_or_unset TMP "$old_tmp"
|
|
_nix_export_or_unset TMPDIR "$old_tmpdir"
|
|
_nix_export_or_unset TEMP "$old_temp"
|
|
_nix_export_or_unset TEMPDIR "$old_tempdir"
|
|
export XDG_DATA_DIRS=$XDG_DATA_DIRS${old_xdg_data_dirs:+":"}$old_xdg_data_dirs
|
|
}
|
|
|
|
_nix_add_gcroot() {
|
|
local storepath=$1
|
|
local symlink=$2
|
|
|
|
local stripped_pwd=${2/\//}
|
|
local escaped_pwd=${stripped_pwd//-/--}
|
|
local escaped_pwd=${escaped_pwd//\//-}
|
|
ln -fsn "$storepath" "$symlink"
|
|
ln -fsn "$symlink" "/nix/var/nix/gcroots/per-user/$USER/$escaped_pwd"
|
|
}
|
|
|
|
_nix_argsum_suffix() {
|
|
local out checksum
|
|
if [ -n "$1" ]; then
|
|
|
|
if has sha1sum; then
|
|
out=$(sha1sum <<< "$1")
|
|
elif has shasum; then
|
|
out=$(shasum <<< "$1")
|
|
else
|
|
# degrate gracefully both tools are not present
|
|
return
|
|
fi
|
|
read -r checksum _ <<< "$out"
|
|
echo "-$checksum"
|
|
fi
|
|
}
|
|
|
|
use_flake() {
|
|
flake_expr="${1:-.}"
|
|
flake_dir="${flake_expr%#*}"
|
|
watch_file "$flake_dir/"flake.nix
|
|
watch_file "$flake_dir/"flake.lock
|
|
|
|
local layout_dir profile
|
|
layout_dir=$(direnv_layout_dir)
|
|
profile="${layout_dir}/flake-profile$(_nix_argsum_suffix "$flake_expr")"
|
|
local flake_inputs="${layout_dir}/flake-inputs/"
|
|
local profile_rc="${profile}.rc"
|
|
|
|
if [[ ! -e "$profile"
|
|
|| ! -e "$profile_rc"
|
|
|| "$HOME/.direnvrc" -nt "$profile_rc"
|
|
|| .envrc -nt "$profile_rc"
|
|
|| "$flake_dir/"flake.nix -nt "$profile_rc"
|
|
|| "$flake_dir/"flake.lock -nt "$profile_rc"
|
|
]];
|
|
then
|
|
local tmp_profile="${layout_dir}/flake-profile.$$"
|
|
[[ -d "$layout_dir" ]] || mkdir -p "$layout_dir"
|
|
local tmp_profile_rc
|
|
tmp_profile_rc=$("${NIX_BIN_PREFIX}nix" print-dev-env \
|
|
--extra-experimental-features "nix-command flakes" \
|
|
--profile "$tmp_profile" "$flake_expr")
|
|
drv=$(ls -dl "$tmp_profile")
|
|
drv=${drv#*-> }
|
|
echo "$tmp_profile_rc" > "$profile_rc"
|
|
rm -f "$tmp_profile" "$tmp_profile"*
|
|
_nix_add_gcroot "$drv" "$profile"
|
|
|
|
# also add garbage collection root for source
|
|
local flake_input_paths
|
|
rm -rf "$flake_inputs"
|
|
mkdir "$flake_inputs"
|
|
flake_input_paths=$("${NIX_BIN_PREFIX}nix" flake archive --json \
|
|
--extra-experimental-features "nix-command flakes" \
|
|
"$flake_dir" | grep -E -o '/nix/store/[^"]+')
|
|
for path in $flake_input_paths; do
|
|
_nix_add_gcroot "$path" "${flake_inputs}/${path##*/}"
|
|
done
|
|
|
|
log_status renewed cache
|
|
else
|
|
log_status using cached dev shell
|
|
fi
|
|
|
|
_nix_import_env "$profile_rc"
|
|
|
|
}
|
|
|
|
use_nix() {
|
|
local path layout_dir
|
|
path=$("${NIX_BIN_PREFIX}nix-instantiate" --find-file nixpkgs)
|
|
layout_dir=$(direnv_layout_dir)
|
|
if ! "${NIX_BIN_PREFIX}nix-shell" --extra-experimental-features '' --version 2>/dev/null >&2; then
|
|
log_status "Your nix is too old for nix-direnv. At least nix 2.4 is required"
|
|
return
|
|
fi
|
|
|
|
if [[ "${direnv:-}" == "" ]]; then
|
|
log_status "\$direnv environment variable was not defined. Was this script run inside direnv?"
|
|
fi
|
|
|
|
local version
|
|
if [[ -f "${path}/.version-suffix" ]]; then
|
|
version=$(< "${path}/.version-suffix")
|
|
elif [[ -f "${path}/.git/HEAD" ]]; then
|
|
local head
|
|
read -r head < "${path}/.git/HEAD"
|
|
local regex="ref: (.*)"
|
|
if [[ "$head" =~ $regex ]]; then
|
|
read -r version < "${path}/.git/${BASH_REMATCH[1]}"
|
|
else
|
|
version="$head"
|
|
fi
|
|
elif [[ -f "${path}/.version" && "${path}" == "/nix/store/"* ]]; then
|
|
# borrow some bits from the store path
|
|
local version_prefix
|
|
read -r version_prefix < "${path}/.version"
|
|
version="${version_prefix}-${path:11:16}"
|
|
fi
|
|
|
|
local profile
|
|
|
|
profile="${layout_dir}/nix-profile-${version:-unknown}$(_nix_argsum_suffix "$*")"
|
|
local profile_rc="${profile}.rc"
|
|
|
|
local in_packages=0
|
|
local attribute=
|
|
local packages=""
|
|
local extra_args=()
|
|
local file=
|
|
while [ "$#" -gt 0 ]; do
|
|
i="$1"; shift
|
|
case $i in
|
|
-p|--packages)
|
|
in_packages=1
|
|
;;
|
|
# ignore unsupported arguments
|
|
--command|--run|--exclude)
|
|
shift
|
|
;;
|
|
# ignore unsupported arguments
|
|
--pure|-i|--keep)
|
|
;;
|
|
-I)
|
|
extra_args+=("$i" "$1")
|
|
shift
|
|
;;
|
|
--attr|-A)
|
|
attribute=$1
|
|
shift
|
|
;;
|
|
--option|-o|--arg|--argstr)
|
|
extra_args+=("$i" "$1" "$2")
|
|
shift
|
|
shift
|
|
;;
|
|
-*)
|
|
echo "unknown argument $i"
|
|
return
|
|
;;
|
|
*)
|
|
if [[ $in_packages == 1 ]]; then
|
|
packages+=" $i"
|
|
else
|
|
file=$i
|
|
fi
|
|
;;
|
|
esac
|
|
done
|
|
|
|
if [[ ! -e "$profile"
|
|
|| ! -e "$profile_rc"
|
|
|| "$HOME/.direnvrc" -nt "$profile_rc"
|
|
|| .envrc -nt "$profile_rc"
|
|
|| default.nix -nt "$profile_rc"
|
|
|| shell.nix -nt "$profile_rc"
|
|
]];
|
|
then
|
|
local tmp_profile="${layout_dir}/flake-profile.$$"
|
|
[[ -d "$layout_dir" ]] || mkdir -p "$layout_dir"
|
|
local tmp_profile_rc
|
|
local extra_args=()
|
|
if [[ $packages != "" ]]; then
|
|
extra_args+=("--expr" "with import <nixpkgs> {}; mkShell { buildInputs = [ $packages ]; }")
|
|
else
|
|
if [[ $file == "" ]]; then
|
|
if [[ -e "shell.nix" ]]; then
|
|
file=./shell.nix
|
|
elif [[ -e "default.nix" ]]; then
|
|
file=./default.nix
|
|
fi
|
|
fi
|
|
if [[ $attribute == "" ]]; then
|
|
extra_args+=(--file "$file")
|
|
else
|
|
extra_args+=(--expr "(import $file).${attribute}")
|
|
fi
|
|
fi
|
|
tmp_profile_rc=$("${NIX_BIN_PREFIX}nix" print-dev-env \
|
|
--extra-experimental-features "nix-command flakes" \
|
|
--profile "$tmp_profile" --impure "${extra_args[@]}")
|
|
drv=$(ls -dl "$tmp_profile")
|
|
drv=${drv#*-> }
|
|
echo "$tmp_profile_rc" > "$profile_rc"
|
|
rm -f "$tmp_profile" "$tmp_profile"*
|
|
_nix_add_gcroot "$drv" "$profile"
|
|
log_status renewed cache
|
|
else
|
|
log_status using cached derivation
|
|
fi
|
|
|
|
_nix_import_env "$profile_rc"
|
|
|
|
if [[ "$#" == 0 ]]; then
|
|
watch_file default.nix
|
|
watch_file shell.nix
|
|
fi
|
|
}
|