Move all of NixOS to nixos/ in preparation of the repository merge

1 files changed, 155 insertions, 0 deletions

diff --git a/nixos/modules/system/activation/activation-script.nix b/nixos/modules/system/activation/activation-script.nix
new file mode 100644
index 00000000000..dc017563217
--- /dev/null
+++ b/nixos/modules/system/activation/activation-script.nix
@@ -0,0 +1,155 @@
+# generate the script used to activate the configuration.
+{ config, pkgs, ... }:
+
+with pkgs.lib;
+
+let
+
+  addAttributeName = mapAttrs (a: v: v // {
+    text = ''
+      #### Activation script snippet ${a}:
+      ${v.text}
+    '';
+  });
+
+  path =
+    [ pkgs.coreutils pkgs.gnugrep pkgs.findutils
+      pkgs.glibc # needed for getent
+      pkgs.shadow
+      pkgs.nettools # needed for hostname
+    ];
+
+in
+
+{
+
+  ###### interface
+
+  options = {
+
+    system.activationScripts = mkOption {
+      default = {};
+
+      example = {
+        stdio = {
+          text = ''
+            # Needed by some programs.
+            ln -sfn /proc/self/fd /dev/fd
+            ln -sfn /proc/self/fd/0 /dev/stdin
+            ln -sfn /proc/self/fd/1 /dev/stdout
+            ln -sfn /proc/self/fd/2 /dev/stderr
+          '';
+          deps = [];
+        };
+      };
+
+      description = ''
+        Activate the new configuration (i.e., update /etc, make accounts,
+        and so on).
+      '';
+
+      merge = mergeTypedOption "script" builtins.isAttrs (fold mergeAttrs {});
+
+      apply = set: {
+        script =
+          ''
+            #! ${pkgs.stdenv.shell}
+
+            systemConfig=@out@
+
+            export PATH=/empty
+            for i in ${toString path}; do
+                PATH=$PATH:$i/bin:$i/sbin
+            done
+
+            # Ensure a consistent umask.
+            umask 0022
+
+            ${
+              let
+                set' = mapAttrs (n: v: if builtins.isString v then noDepEntry v else v) set;
+                withHeadlines = addAttributeName set';
+              in textClosureMap id (withHeadlines) (attrNames withHeadlines)
+            }
+
+            # Make this configuration the current configuration.
+            # The readlink is there to ensure that when $systemConfig = /system
+            # (which is a symlink to the store), /run/current-system is still
+            # used as a garbage collection root.
+            ln -sfn "$(readlink -f "$systemConfig")" /run/current-system
+
+            # Prevent the current configuration from being garbage-collected.
+            ln -sfn /run/current-system /nix/var/nix/gcroots/current-system
+          '';
+      };
+
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = {
+
+    system.activationScripts.stdio =
+      ''
+        # Needed by some programs.
+        ln -sfn /proc/self/fd /dev/fd
+        ln -sfn /proc/self/fd/0 /dev/stdin
+        ln -sfn /proc/self/fd/1 /dev/stdout
+        ln -sfn /proc/self/fd/2 /dev/stderr
+      '';
+
+    system.activationScripts.var =
+      ''
+        # Various log/runtime directories.
+
+        touch /var/run/utmp # must exist
+        chgrp ${toString config.ids.gids.utmp} /var/run/utmp
+        chmod 664 /var/run/utmp
+
+        mkdir -m 0755 -p /var/run/nix/current-load # for distributed builds
+        mkdir -m 0700 -p /var/run/nix/remote-stores
+
+        # Directory holding symlinks to currently running Upstart
+        # jobs.  Used to determine which jobs need to be restarted
+        # when switching to a new configuration.
+        mkdir -m 0700 -p /var/run/upstart-jobs
+
+        mkdir -m 0755 -p /var/log
+
+        touch /var/log/wtmp # must exist
+        chmod 644 /var/log/wtmp
+
+        touch /var/log/lastlog
+        chmod 644 /var/log/lastlog
+
+        mkdir -m 1777 -p /var/tmp
+
+        # Empty, read-only home directory of many system accounts.
+        mkdir -m 0555 -p /var/empty
+      '';
+
+    system.activationScripts.media =
+      ''
+        mkdir -m 0755 -p /media
+      '';
+
+    system.activationScripts.usrbinenv =
+      ''
+        mkdir -m 0755 -p /usr/bin
+        ln -sfn ${pkgs.coreutils}/bin/env /usr/bin/.env.tmp
+        mv /usr/bin/.env.tmp /usr/bin/env # atomically replace /usr/bin/env
+      '';
+
+    system.activationScripts.tmpfs =
+      ''
+        ${pkgs.utillinux}/bin/mount -o "remount,size=${config.boot.devSize}" none /dev
+        ${pkgs.utillinux}/bin/mount -o "remount,size=${config.boot.devShmSize}" none /dev/shm
+        ${pkgs.utillinux}/bin/mount -o "remount,size=${config.boot.runSize}" none /run
+      '';
+
+  };
+
+}