flake.nix: add `nix store diff-closures` to microvm-update-*

2022-06-17 23:23:31 +02:00 · 2022-06-17 23:23:31 +02:00 · 0f7d6a3c7c
parent 6508600c80
commit 0f7d6a3c7c
1 changed files with 14 additions and 1 deletions
--- a/flake.nix
+++ b/flake.nix
@ -253,10 +253,17 @@
              cd /var/lib/microvms/${name}
              chown root:kvm .
              chmod 0775 .
+
+              rm -f old
+              [ -e current ] && mv current old
+
              nix build -L \
                -o current \
                ${self}#nixosConfigurations.${name}.config.microvm.declaredRunner
              echo '${selfRef}' > flake
+
+              [ -e old ] && nix store diff-closures ./old ./current
+
              systemctl restart microvm@${name}.service
              END
            '';
@ -270,9 +277,15 @@
              cd /var/lib/microvms/${name}
              chown root:kvm .
              chmod 0775 .
-              rm -f current
+
+              rm -f old
+              [ -e current ] && mv current old
+
              ln -s ${hostConfig.microvm.declaredRunner} current
              echo '${selfRef}' > flake
+
+              [ -e old ] && nix store diff-closures ./old ./current
+
              systemctl restart microvm@${name}.service
              END
            '';