Specify --suppress-sync when running package managers

Package managers tend to make sure of sync() and friends to ensure
that any files they write are actually written to disk. This is
important when a package manager is used to do system package upgrades,
but is unnecessary when using package managers to build OS images. So
let's make sync() and friends a noop when we invoke package managers

Replaces #3544

diff --git a/mkosi/installer/__init__.py b/mkosi/installer/__init__.py
index bc912dfecdc155fba481a9edae7a87809727ed59..43912cd8ca7ff0267de1f2dc9ebc8d9d51224309 100644 (file)
--- a/mkosi/installer/__init__.py
+++ b/mkosi/installer/__init__.py
@@ -106,6 +106,7 @@ class PackageManager:
             *(apivfs_options() if apivfs else []),
             "--become-root",
             "--suppress-chown",
+            "--suppress-sync",
             # Make sure /etc/machine-id is not overwritten by any package manager post install scripts.
             "--ro-bind-try", Path(root) / "etc/machine-id", "/buildroot/etc/machine-id",
             # Nudge gpg to create its sockets in /run by making sure /run/user/0 exists.