Don't require extra trees to exist when parsing config

These might be created by a preset so leave checking whether these
exist to check_inputs().

diff --git a/mkosi/config.py b/mkosi/config.py
index 3c526e60fbd5809c4ba40bbef6e49fbe9789c1a6..c857bd8745cfa487eaf74b504f96e9700eb45ddd 100644 (file)
--- a/mkosi/config.py
+++ b/mkosi/config.py
@@ -116,7 +116,7 @@ def parse_path(value: str,
 
 def parse_source_target_paths(value: str) -> tuple[Path, Optional[Path]]:
     src, sep, target = value.partition(':')
-    src_path = parse_path(src, required=True)
+    src_path = parse_path(src, required=False)
     if sep:
         target_path = parse_path(target, required=False, absolute=False, expanduser=False)
         if not target_path.is_absolute():