Don't run the readme check for subprojects

The superproject should have a readme, but it's not necessarily essential for the subproject to have one as well.

Author: per1234

check/checkfunctions/checkfunctions.go

@@ -69,6 +69,10 @@ func containsIncorrectPathBaseCase(pathList paths.PathList, correctBaseName stri
 
 // MissingReadme checks if the project has a readme that will be recognized by GitHub.
 func MissingReadme() (result checkresult.Type, output string) {
+	if checkdata.ProjectType() != checkdata.SuperProjectType() {
+		return checkresult.NotRun, "Readme not required for subprojects"
+	}
+
 	// https://github.com/github/markup/blob/master/README.md
 	readmeRegexp := regexp.MustCompile(`(?i)^readme\.(markdown)|(mdown)|(mkdn)|(md)|(textile)|(rdoc)|(org)|(creole)|(mediawiki)|(wiki)|(rst)|(asciidoc)|(adoc)|(asc)|(pod)|(txt)`)
 

check/checkfunctions/library_test.go

@@ -400,4 +400,15 @@ func TestMissingReadme(t *testing.T) {
 	}
 
 	checkLibraryCheckFunction(MissingReadme, testTables, t)
+
+	testProject := project.Type{
+		Path:             testDataPath.Join("NoReadme"),
+		ProjectType:      projecttype.Library,
+		SuperprojectType: projecttype.Platform,
+	}
+
+	checkdata.Initialize(testProject, schemasPath)
+
+	result, _ := MissingReadme()
+	assert.Equal(t, checkresult.NotRun, result, "Don't run for subprojects")
 }