From 67d14dbbe9415bed4acc0bda7a44d763863e42f9 Mon Sep 17 00:00:00 2001
From: TECHNOFAB <admin@technofab.de>
Date: Sun, 27 Oct 2024 18:05:57 +0100
Subject: [PATCH] feat: add support for changing the timezone in the container

---
 image.nix                     |  7 ++++++-
 nix-kubernetes/kubernetes.nix |  4 ++++
 nix-kubernetes/parameters.nix | 10 ++++++++++
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/image.nix b/image.nix
index 1950ce4..604766a 100644
--- a/image.nix
+++ b/image.nix
@@ -14,6 +14,7 @@
       gitMinimal
       curl
       ncurses
+      less
 
       cacert.out
 
@@ -34,7 +35,7 @@
     };
 
     nixConfContents =
-      (lib.concatStringsSep "\n" (lib.mapAttrsFlatten (n: v: let
+      (lib.concatStringsSep "\n" (lib.mapAttrsToList (n: v: let
         vStr =
           if builtins.isList v
           then lib.concatStringsSep " " v
@@ -95,6 +96,9 @@
       echo "coder:100000:65536" > $out/etc/subuid
       echo "coder:100000:65536" > $out/etc/subgid
 
+      # support timezones
+      ln -s ${pkgs.tzdata}/share/zoneinfo $out/etc/zoneinfo
+
       ln -s ${profile} $out/nix/var/nix/profiles/default-1-link
       ln -s /nix/var/nix/profiles/default-1-link $out/nix/var/nix/profiles/default
 
@@ -129,6 +133,7 @@ in
         "HOME=/home/coder"
         "TMPDIR=/tmp"
         "XDG_RUNTIME_DIR=/tmp"
+        "TZDIR=/etc/zoneinfo"
         "PATH=${lib.concatStringsSep ":" [
           "/home/coder/.nix-profile/bin"
           # this makes all the packages defined at the top available
diff --git a/nix-kubernetes/kubernetes.nix b/nix-kubernetes/kubernetes.nix
index 27b9280..6ebb6dd 100644
--- a/nix-kubernetes/kubernetes.nix
+++ b/nix-kubernetes/kubernetes.nix
@@ -81,6 +81,10 @@
                 name = "DOTFILES_REPO";
                 value = "\${data.coder_parameter.dotfiles_repo.value}";
               }
+              {
+                name = "TZ";
+                value = "\${data.coder_parameter.timezone.value}";
+              }
             ];
             resources = {
               requests = {
diff --git a/nix-kubernetes/parameters.nix b/nix-kubernetes/parameters.nix
index 630bfbb..63b659f 100644
--- a/nix-kubernetes/parameters.nix
+++ b/nix-kubernetes/parameters.nix
@@ -87,5 +87,15 @@
         }
       ];
     };
+    timezone = {
+      name = "Timezone";
+      description = ''
+        Content of the TZ environment variable.
+      '';
+      default = "";
+      order = 8;
+      type = "string";
+      mutable = true;
+    };
   };
 }