docs: change stable from 20.03 to 20.09

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2017-2020 Robert Helgesson and Home Manager contributors
+Copyright (c) 2017-2020 Home Manager contributors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -27,7 +27,7 @@ will write to your dconf store and cannot tell whether a configuration
 that it is about to be overwrite was from a previous Home Manager
 generation or from manual configuration.
 
-Home Manager targets [NixOS][] unstable and NixOS version 20.03 (the
+Home Manager targets [NixOS][] unstable and NixOS version 20.09 (the
 current stable version), it may or may not work on other Linux
 distributions and NixOS versions.
 
@@ -73,11 +73,11 @@ Currently the easiest way to install Home Manager is as follows:
     if you are following Nixpkgs master or an unstable channel and
 
     ```console
-    $ nix-channel --add https://github.com/nix-community/home-manager/archive/release-20.03.tar.gz home-manager
+    $ nix-channel --add https://github.com/nix-community/home-manager/archive/release-20.09.tar.gz home-manager
     $ nix-channel --update
     ```
 
-    if you follow a Nixpkgs version 20.03 channel.
+    if you follow a Nixpkgs version 20.09 channel.
 
     On NixOS you may need to log out and back in for the channel to
     become available. On non-NixOS you may have to add
@@ -349,7 +349,7 @@ Home Manager is developed against `nixpkgs-unstable` branch, which
 often causes it to contain tweaks for changes/packages not yet
 released in stable NixOS. To avoid breaking users' configurations,
 Home Manager is released in branches corresponding to NixOS releases
-(e.g. `release-20.03`). These branches get fixes, but usually not new
+(e.g. `release-20.09`). These branches get fixes, but usually not new
 modules. If you need a module to be backported, then feel free to open
 an issue.
 

doc/installation.xml

@@ -69,11 +69,11 @@
      if you are following Nixpkgs master or an unstable channel and
     </para>
 <screen>
-<prompt>$</prompt> <userinput>nix-channel --add https://github.com/nix-community/home-manager/archive/release-20.03.tar.gz home-manager</userinput>
+<prompt>$</prompt> <userinput>nix-channel --add https://github.com/nix-community/home-manager/archive/release-20.09.tar.gz home-manager</userinput>
 <prompt>$</prompt> <userinput>nix-channel --update</userinput>
 </screen>
     <para>
-     if you follow a Nixpkgs version 20.03 channel.
+     if you follow a Nixpkgs version 20.09 channel.
     </para>
     <para>
      On NixOS you may need to log out and back in for the channel to become
@@ -159,12 +159,12 @@ $HOME/.nix-profile/etc/profile.d/hm-session-vars.sh
   </para>
 
 <screen language="console">
-<prompt>#</prompt> <userinput>nix-channel --add https://github.com/nix-community/home-manager/archive/release-20.03.tar.gz home-manager</userinput>
+<prompt>#</prompt> <userinput>nix-channel --add https://github.com/nix-community/home-manager/archive/release-20.09.tar.gz home-manager</userinput>
 <prompt>#</prompt> <userinput>nix-channel --update</userinput>
 </screen>
 
   <para>
-   if you follow a Nixpkgs version 20.03 channel.
+   if you follow a Nixpkgs version 20.09 channel.
   </para>
 
   <para>
@@ -258,12 +258,12 @@ home-manager.useGlobalPkgs = true;
   </para>
 
 <screen language="console">
-<prompt>#</prompt> <userinput>nix-channel --add https://github.com/nix-community/home-manager/archive/release-20.03.tar.gz home-manager</userinput>
+<prompt>#</prompt> <userinput>nix-channel --add https://github.com/nix-community/home-manager/archive/release-20.09.tar.gz home-manager</userinput>
 <prompt>#</prompt> <userinput>nix-channel --update</userinput>
 </screen>
 
   <para>
-   if you follow a Nixpkgs version 20.03 channel.
+   if you follow a Nixpkgs version 20.09 channel.
   </para>
 
   <para>

doc/release-notes/release-notes.adoc

@@ -6,6 +6,8 @@ This section lists the release notes for stable versions of Home Manager and the
 
 :leveloffset: 1
 
+include::rl-2103.adoc[]
+
 include::rl-2009.adoc[]
 
 include::rl-2003.adoc[]

doc/release-notes/rl-2009.adoc

@@ -1,8 +1,7 @@
 [[sec-release-20.09]]
-== Release 20.09 (unreleased)
+== Release 20.09
 
-This is the current unstable branch and the information in this
+The 20.03 release branch became the stable branch in late September, 2020.
-section is therefore not final.
 
 [[sec-release-20.09-highlights]]
 === Highlights

doc/release-notes/rl-2103.adoc

@@ -0,0 +1,21 @@
+[[sec-release-21.03]]
+== Release 21.03
+
+This is the current unstable branch and the information in this
+section is therefore not final.
+
+[[sec-release-21.03-highlights]]
+=== Highlights
+
+This release has the following notable changes:
+
+* Nothing has happened.
+
+[[sec-release-21.03-state-version-changes]]
+=== State Version Changes
+
+The state version in this release includes the changes below. These
+changes are only active if the `home.stateVersion` option is set to
+"21.03" or later.
+
+* Nothing has happened.

home-manager/install.nix

@@ -45,7 +45,7 @@ runCommand "home-manager-install" {
       # 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";
+      home.stateVersion = "21.03";
     }
     EOF
     fi

modules/misc/version.nix

@@ -5,7 +5,7 @@ with lib;
 {
   options = {
     home.stateVersion = mkOption {
-      type = types.enum [ "18.09" "19.03" "19.09" "20.03" "20.09" ];
+      type = types.enum [ "18.09" "19.03" "19.09" "20.03" "20.09" "21.03" ];
       default = "18.09";
       description = ''
         It is occasionally necessary for Home Manager to change