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introduce helper function to unset env variables.

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This commit is contained in:
Jörg Thalheim 2020-08-15 09:46:32 +01:00
parent 666edff7fe
commit 83eb30fbdd
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GPG key ID: 003F2096411B5F92
1 changed files with 24 additions and 47 deletions
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71
direnvrc
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@ -1,40 +1,37 @@
# shellcheck shell=bash
_nix_export_or_unset() {
local key=$1 value=$2
if [[ "$value" == __UNSET__ ]]; then
unset "$key"
else
export "$key=$value"
fi
}
_nix_import_env() {
local env=$1
local term_backup=$TERM path_backup=$PATH
if [[ -n ${TMPDIR+x} ]]; then
local tmp_backup=$TMPDIR
fi
local impure_ssl_cert_file=${SSL_CERT_FILE:-__UNSET__}
local impure_nix_ssl_cert_file=${NIX_SSL_CERT_FILE:-__UNSET__}
local old_path=${PATH:-}
local old_term=${TERM:-__UNSET__}
local old_tmpdir=${TMPDIR:-__UNSET__}
local old_ssl_cert_file=${SSL_CERT_FILE:-__UNSET__}
local old_nix_ssl_cert_file=${NIX_SSL_CERT_FILE:-__UNSET__}
eval "$env"
# `nix-shell --pure` sets invalid ssl certificate paths
if [[ "${SSL_CERT_FILE:-}" = /no-cert-file.crt ]]; then
if [[ $impure_ssl_cert_file == __UNSET__ ]]; then
unset SSL_CERT_FILE
else
export SSL_CERT_FILE=$impure_ssl_cert_file
fi
_nix_export_or_unset SSL_CERT_FILE "$old_ssl_cert_file"
fi
if [[ "${NIX_SSL_CERT_FILE:-}" = /no-cert-file.crt ]]; then
if [[ $impure_nix_ssl_cert_file == __UNSET__ ]]; then
unset NIX_SSL_CERT_FILE
else
export NIX_SSL_CERT_FILE=${impure_nix_ssl_cert_file}
fi
_nix_export_or_unset NIX_SSL_CERT_FILE "$old_nix_ssl_cert_file"
fi
export PATH=$PATH:$path_backup TERM=$term_backup
if [[ -n ${tmp_backup+x} ]]; then
export TMPDIR=${tmp_backup}
else
unset TMPDIR
fi
export PATH=$PATH${old_path:+":"}$old_path
_nix_export_or_unset TEMPDIR "$old_tmp"
_nix_export_or_unset TERM "$old_term"
# misleading since we are in an impure shell now
export IN_NIX_SHELL=impure
@ -90,31 +87,11 @@ use_flake() {
rmdir "$NIX_BUILD_TOP"
fi
if [[ "$old_nix_build_top" == __UNSET__ ]]; then
unset NIX_BUILD_TOP
else
export NIX_BUILD_TOP=$old_nix_build_top
fi
if [[ "$old_tmp" == __UNSET__ ]]; then
unset TMP
else
export TMP=$old_temp
fi
if [[ "$old_tmpdir" == __UNSET__ ]]; then
unset TMPDIR
else
export TMPDIR=$old_tmpdir
fi
if [[ "$old_temp" == __UNSET__ ]]; then
unset TEMP
else
export TEMP=$old_temp
fi
if [[ "$old_tempdir" == __UNSET__ ]]; then
unset TEMPDIR
else
export TEMPDIR=$old_tempdir
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"
}
use_nix() {