Send mail when nixos-upgrade failed

1 files changed, 29 insertions, 0 deletions

diff --git a/ymir.nix b/ymir.nix
index 3c0db516..9a9dc7d8 100644
--- a/ymir.nix
+++ b/ymir.nix
@@ -898,4 +898,33 @@ in rec {
     git -C /etc/nixos pull
     git -C /etc/nixos submodule update
   '';
+  systemd.services."nixos-upgrade".onFailure = "unit-status-mail@%n.service";
+
+  systemd.services."unit-status-mail@" = {
+    scriptArgs = "%I %H %m %b";
+    script = ''
+      #!${stdenv.shell}
+      MAILTO="root"
+      MAILFROM="unit-status-mailer"
+      UNIT=$1
+
+      EXTRA=""
+      for e in "${@:2}"; do
+        EXTRA+="$e"$'\n'
+        done
+
+        UNITSTATUS=$(systemctl status $UNIT)
+
+        sendmail $MAILTO <<EOF
+        From:$MAILFROM
+        To:$MAILTO
+        Subject:Status mail for unit: $UNIT
+
+        Status report for unit: $UNIT
+        $EXTRA
+
+        $UNITSTATUS
+        EOF
+    '';
+  };
 }