1 files changed, 64 insertions, 0 deletions
diff --git a/nixos/modules/programs/shell.nix b/nixos/modules/programs/shell.nix
new file mode 100644
index 00000000000..679c4979dfa
--- /dev/null
+++ b/nixos/modules/programs/shell.nix
@@ -0,0 +1,64 @@
+# This module defines a standard configuration for NixOS shells.
+
+{ config, pkgs, ... }:
+
+with pkgs.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 -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 "http://nixos.org/channels/nixos-unstable 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 $HOME/.nix-defexpr
+            if [ "$USER" != root ]; then
+                ln -s /nix/var/nix/profiles/per-user/root/channels $HOME/.nix-defexpr/channels_root
+            fi
+        fi
+      '';
+
+  };
+
+}