Track local packages in cache manifest

Let's track the modification timestamps of the packages from configured
package directories so we can rebuild the image if new packages appear
or are removed or changed.

diff --git a/mkosi/config.py b/mkosi/config.py
index b8bcdd4be76a7ba752564367cc4af94b0e2ebd42..7e57081fbdf0548257c3708107cbfc855f4c5c97 100644 (file)
--- a/mkosi/config.py
+++ b/mkosi/config.py
@@ -1657,6 +1657,11 @@ class Config:
             "package_manager": self.distribution.package_manager(self).executable(self),
             "packages": sorted(self.packages),
             "build_packages": sorted(self.build_packages),
+            "package_directories": [
+                (p.name, p.stat().st_mtime_ns)
+                for d in self.package_directories
+                for p in sorted(flatten(d.glob(glob) for glob in PACKAGE_GLOBS))
+            ],
             "repositories": sorted(self.repositories),
             "overlay": self.overlay,
             "prepare_scripts": sorted(