1 files changed, 84 insertions, 0 deletions
diff --git a/home-manager/home-manager/install.nix b/home-manager/home-manager/install.nix
new file mode 100644
index 00000000000..87252730e6f
--- /dev/null
+++ b/home-manager/home-manager/install.nix
@@ -0,0 +1,84 @@
+{ home-manager, runCommand }:
+
+runCommand "home-manager-install" {
+  propagatedBuildInputs = [ home-manager ];
+  preferLocalBuild = true;
+  allowSubstitutes = false;
+  shellHookOnly = true;
+  shellHook = ''
+    confFile="''${XDG_CONFIG_HOME:-$HOME/.config}/nixpkgs/home.nix"
+
+    if [[ ! -e $confFile ]]; then
+      echo
+      echo "Creating initial Home Manager configuration..."
+
+      nl=$'\n'
+      xdgVars=""
+      if [[ -v XDG_CACHE_HOME && $XDG_CACHE_HOME != "$HOME/.cache" ]]; then
+        xdgVars="$xdgVars  xdg.cacheHome = \"$XDG_CACHE_HOME\";$nl"
+      fi
+      if [[ -v XDG_CONFIG_HOME && $XDG_CONFIG_HOME != "$HOME/.config" ]]; then
+        xdgVars="$xdgVars  xdg.configHome = \"$XDG_CONFIG_HOME\";$nl"
+      fi
+      if [[ -v XDG_DATA_HOME && $XDG_DATA_HOME != "$HOME/.local/share" ]]; then
+        xdgVars="$xdgVars  xdg.dataHome = \"$XDG_DATA_HOME\";$nl"
+      fi
+
+      mkdir -p "$(dirname "$confFile")"
+      cat > $confFile <<EOF
+    { config, pkgs, ... }:
+
+    {
+      # Let Home Manager install and manage itself.
+      programs.home-manager.enable = true;
+
+      # Home Manager needs a bit of information about you and the
+      # paths it should manage.
+      home.username = "$USER";
+      home.homeDirectory = "$HOME";
+    $xdgVars
+      # This value determines the Home Manager release that your
+      # configuration is compatible with. This helps avoid breakage
+      # when a new Home Manager release introduces backwards
+      # incompatible changes.
+      #
+      # You can update Home Manager without changing this value. See
+      # the Home Manager release notes for a list of state version
+      # changes in each release.
+      home.stateVersion = "20.09";
+    }
+    EOF
+    fi
+
+    echo
+    echo "Creating initial Home Manager generation..."
+    echo
+
+    if home-manager switch; then
+      cat <<EOF
+
+    All done! The home-manager tool should now be installed and you
+    can edit
+
+        $confFile
+
+    to configure Home Manager. Run 'man home-configuration.nix' to
+    see all available options.
+    EOF
+      exit 0
+    else
+      cat <<EOF
+
+    Uh oh, the installation failed! Please create an issue at
+
+        https://github.com/rycee/home-manager/issues
+
+    if the error seems to be the fault of Home Manager.
+    EOF
+      exit 1
+    fi
+  '';
+} ''
+  echo This derivation is not buildable, instead run it using nix-shell.
+  exit 1
+''