pkg/networks/config.go: allow non-existing networks.yaml fields

Allow non-existing YAML fields, as a config created with Lima < v0.22 contains
`vdeSwitch` and `vdeVMNet`.
These fields were removed in Lima v0.22 (PR 2311).

Signed-off-by: Akihiro Suda <[email protected]>

Author: AkihiroSuda

pkg/networks/config.go

@@ -132,11 +132,17 @@ func loadCache() {
 		if cache.err != nil {
 			return
 		}
-		cache.err = yaml.UnmarshalWithOptions(b, &cache.config, yaml.Strict())
+		cache.err = yaml.UnmarshalWithOptions(b, &cache.config, yaml.DisallowDuplicateKey())
 		if cache.err != nil {
 			cache.err = fmt.Errorf("cannot parse %q: %w", configFile, cache.err)
 			return
 		}
+		var strictConfig YAML
+		if strictErr := yaml.UnmarshalWithOptions(b, &strictConfig, yaml.Strict()); strictErr != nil {
+			// Allow non-existing YAML fields, as a config created with Lima < v0.22 contains `vdeSwitch` and `vdeVMNet`.
+			// These fields were removed in Lima v0.22.
+			logrus.WithError(strictErr).Warn("Non-strict YAML is deprecated and will be unsupported in a future version of Lima: " + configFile)
+		}
 		cache.config, cache.err = fillDefaults(cache.config)
 		if cache.err != nil {
 			cache.err = fmt.Errorf("cannot fill default %q: %w", configFile, cache.err)