void-packages/srcpkgs/nix/files/nix.sh

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#sync with https://github.com/NixOS/nix/blob/3be58fe1bc781fd39649f616c8ba4e5be672d505/scripts/nix-profile-daemon.sh.in
export NIX_USER_PROFILE_DIR="/nix/var/nix/profiles/per-user/$USER"
export NIX_PROFILES="/nix/var/nix/profiles/default $HOME/.nix-profile"
# Set up the per-user profile.
mkdir -m 0755 -p $NIX_USER_PROFILE_DIR
if ! test -O "$NIX_USER_PROFILE_DIR"; 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 "https://nixos.org/channels/nixpkgs-unstable nixpkgs" > $HOME/.nix-channels
fi
# Create the per-user garbage collector roots directory.
NIX_USER_GCROOTS_DIR=/nix/var/nix/gcroots/per-user/$USER
mkdir -m 0755 -p $NIX_USER_GCROOTS_DIR
if ! test -O "$NIX_USER_GCROOTS_DIR"; 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 $HOME/.nix-defexpr/channels_root
fi
fi
fi
export PATH=/nix/var/nix/profiles/default/bin:$PATH
export PATH=$HOME/.nix-profile/bin:$PATH
export NIX_PATH=$HOME/.nix-defexpr/channels