fix: accept a v0 description without features

testdata/v0/valid/no-network/standard_minimal_example.yml

@@ -0,0 +1,36 @@
+publiccodeYmlVersion: "0"
+
+name: Medusa
+url: "https://example.com/italia/medusa.git"
+platforms:
+  - web
+
+developmentStatus: development
+
+softwareType: "standalone/desktop"
+
+description:
+  en:
+    shortDescription: >
+      A rather short description which
+      is probably useless
+
+    longDescription: >
+      Very long description of this software, also split
+      on multiple rows. You should note what the software
+      is and why one should need it. We can potentially
+      have many pages of text here.
+
+legal:
+  license: AGPL-3.0-or-later
+
+maintenance:
+  type: "community"
+
+  contacts:
+    - name: Francesco Rossi
+
+localisation:
+  localisationReady: true
+  availableLanguages:
+    - en

v0.go

@@ -90,7 +90,7 @@ type DescV0 struct {
 	LongDescription  string    `json:"longDescription,omitempty"  validate:"required,umin=150,umax=10000" yaml:"longDescription,omitempty"`
 	Documentation    *URL      `json:"documentation,omitempty"    validate:"omitnil,url_http_url"         yaml:"documentation,omitempty"`
 	APIDocumentation *URL      `json:"apiDocumentation,omitempty" validate:"omitnil,url_http_url"         yaml:"apiDocumentation,omitempty"`
-	Features         *[]string `json:"features,omitempty"         validate:"gt=0,dive"                    yaml:"features,omitempty"`
+	Features         *[]string `json:"features,omitempty"         validate:"omitnil,gt=0,dive"            yaml:"features,omitempty"`
 	Screenshots      []string  `json:"screenshots,omitempty"      yaml:"screenshots,omitempty"`
 	Videos           []*URL    `json:"videos,omitempty"           validate:"dive,required,url_http_url"   yaml:"videos,omitempty"`
 	Awards           []string  `json:"awards,omitempty"           yaml:"awards,omitempty"`

v0_test.go

@@ -385,9 +385,6 @@ func TestInvalidTestcasesV0(t *testing.T) {
 		"description_invalid_language.yml": ValidationResults{
 			ValidationError{"", "description", "description must be a valid BCP 47 language", 18, 1},
 		},
-		"description_en_features_missing.yml": ValidationResults{
-			ValidationError{"", "description.en.features", "features must contain more than 0 items", 22, 5},
-		},
 		"description_en_features_empty.yml": ValidationResults{
 			ValidationError{"", "description.en.features", "features must contain more than 0 items", 39, 5},
 		},
@@ -622,7 +619,6 @@ func TestInvalidTestcasesV0(t *testing.T) {
 			ValidationError{"", "softwareType", "softwareType is a required field", 1, 1},
 			ValidationError{"", "description[en-US].shortDescription", "shortDescription is a required field", 3, 10},
 			ValidationError{"", "description[en-US].longDescription", "longDescription is a required field", 3, 10},
-			ValidationError{"", "description[en-US].features", "features must contain more than 0 items", 3, 10},
 			ValidationError{"", "legal.license", "license is a required field", 5, 8},
 			ValidationError{"", "maintenance.type", "type is a required field", 6, 14},
 			ValidationError{"", "localisation.localisationReady", "localisationReady is a required field", 4, 15},