nixpkgs/nixos/modules/programs/shell.nix
Eelco Dolstra 11a9774c75 Use "mkdir -p" when creating ~/.nix-defexpr
Otherwise, simultaneous invocations of /etc/profile can fail, e.g.

  mkdir: cannot create directory ‘/.nix-defexpr’: File exists
2015-04-20 13:03:04 +02:00

67 lines
1.9 KiB
Nix

# This module defines a standard configuration for NixOS shells.
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.environment;
in
{
config = {
environment.shellAliases =
{ ls = "ls --color=tty";
ll = "ls -l";
l = "ls -alh";
};
environment.shellInit =
''
# Set up the per-user profile.
mkdir -m 0755 -p $NIX_USER_PROFILE_DIR
if test "$(stat --printf '%u' $NIX_USER_PROFILE_DIR)" != "$(id -u)"; then
echo "WARNING: bad ownership on $NIX_USER_PROFILE_DIR" >&2
fi
if test -w $HOME; then
if ! test -L $HOME/.nix-profile; then
if test "$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 $NIX_USER_GCROOTS_DIR
if test "$(stat --printf '%u' $NIX_USER_GCROOTS_DIR)" != "$(id -u)"; then
echo "WARNING: bad ownership on $NIX_USER_GCROOTS_DIR" >&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
'';
};
}