Add check for invalid package index format

Author: per1234

check/checkconfigurations/checkconfigurations.go

@@ -1166,4 +1166,19 @@ var configurations = []Type{
 		ErrorModes:      []checkmode.Type{checkmode.Default},
 		CheckFunction:   checkfunctions.PackageIndexJSONFormat,
 	},
+	{
+		ProjectType:     projecttype.PackageIndex,
+		Category:        "data",
+		Subcategory:     "",
+		ID:              "",
+		Brief:           "Invalid format",
+		Description:     "",
+		MessageTemplate: "Invalid package index format: {{.}}",
+		DisableModes:    nil,
+		EnableModes:     []checkmode.Type{checkmode.Default},
+		InfoModes:       nil,
+		WarningModes:    nil,
+		ErrorModes:      []checkmode.Type{checkmode.Default},
+		CheckFunction:   checkfunctions.PackageIndexFormat,
+	},
 }

check/checkfunctions/packageindex.go

@@ -31,3 +31,11 @@ func PackageIndexJSONFormat() (result checkresult.Type, output string) {
 	return checkresult.Fail, ""
 }
 
+// PackageIndexFormat checks for invalid package index data format.
+func PackageIndexFormat() (result checkresult.Type, output string) {
+	if checkdata.PackageIndexLoadError() != nil {
+		return checkresult.Fail, checkdata.PackageIndexLoadError().Error()
+	}
+
+	return checkresult.Pass, ""
+}

check/checkfunctions/packageindex_test.go

@@ -69,3 +69,12 @@ func TestPackageIndexJSONFormat(t *testing.T) {
 	checkPackageIndexCheckFunction(PackageIndexJSONFormat, testTables, t)
 }
 
+func TestPackageIndexFormat(t *testing.T) {
+	testTables := []packageIndexCheckFunctionTestTable{
+		{"Invalid JSON", "invalid-JSON", checkresult.Fail, ""},
+		{"Not valid package index", "invalid-package-index", checkresult.Fail, ""},
+		{"Valid package index", "valid-package-index", checkresult.Pass, ""},
+	}
+
+	checkPackageIndexCheckFunction(PackageIndexFormat, testTables, t)
+}