nixpkgs/nixos/modules/programs/shell.nix

55 lines
1.9 KiB
Nix

# This module defines a standard configuration for NixOS shells.
{ config, lib, ... }:
with lib;
{
config = {
environment.shellInit =
''
# Set up the per-user profile.
mkdir -m 0755 -p "$NIX_USER_PROFILE_DIR"
if [ "$(stat -c '%u' "$NIX_USER_PROFILE_DIR")" != "$(id -u)" ]; then
echo "WARNING: the per-user profile dir $NIX_USER_PROFILE_DIR should belong to user id $(id -u)" >&2
fi
if [ -w "$HOME" ]; then
if ! [ -L "$HOME/.nix-profile" ]; then
if [ "$USER" != root ]; then
ln -s "$NIX_USER_PROFILE_DIR/profile" "$HOME/.nix-profile"
else
# Root installs in the system-wide profile by default.
ln -s /nix/var/nix/profiles/default "$HOME/.nix-profile"
fi
fi
# Subscribe the root user to the NixOS channel by default.
if [ "$USER" = root -a ! -e "$HOME/.nix-channels" ]; then
echo "${config.system.defaultChannel} nixos" > "$HOME/.nix-channels"
fi
# Create the per-user garbage collector roots directory.
NIX_USER_GCROOTS_DIR="/nix/var/nix/gcroots/per-user/$USER"
mkdir -m 0755 -p "$NIX_USER_GCROOTS_DIR"
if [ "$(stat -c '%u' "$NIX_USER_GCROOTS_DIR")" != "$(id -u)" ]; then
echo "WARNING: the per-user gcroots dir $NIX_USER_GCROOTS_DIR should belong to user id $(id -u)" >&2
fi
# Set up a default Nix expression from which to install stuff.
if [ ! -e "$HOME/.nix-defexpr" -o -L "$HOME/.nix-defexpr" ]; then
rm -f "$HOME/.nix-defexpr"
mkdir -p "$HOME/.nix-defexpr"
if [ "$USER" != root ]; then
ln -s /nix/var/nix/profiles/per-user/root/channels "$HOME/.nix-defexpr/channels_root"
fi
fi
fi
'';
};
}