Removed duplication of extensions table

Author: cmaglie

legacy/builder/create_cmake_rule.go

@@ -29,12 +29,20 @@ import (
 	"github.com/arduino/arduino-cli/legacy/builder/utils"
 )
 
-var VALID_EXPORT_EXTENSIONS = map[string]bool{".h": true, ".c": true, ".hpp": true, ".hh": true, ".cpp": true, ".S": true, ".a": true, ".properties": true}
-
 var ValidExportExtensions = []string{".h", ".c", ".hpp", ".hh", ".cpp", ".S", ".a", ".properties"}
 var DotHExtension = []string{".h", ".hh", ".hpp"}
 var DotAExtension = []string{".a"}
 
+func stringArrayToLookupFunction(in []string) func(string) bool {
+	out := map[string]bool{}
+	for _, i := range in {
+		out[i] = true
+	}
+	return func(s string) bool {
+		return out[s]
+	}
+}
+
 type ExportProjectCMake struct {
 	// Was there an error while compiling the sketch?
 	SketchError bool
@@ -65,7 +73,7 @@ func (s *ExportProjectCMake) Run(ctx *types.Context) error {
 	cmakeFile := cmakeFolder.Join("CMakeLists.txt")
 
 	dynamicLibsFromPkgConfig := map[string]bool{}
-	extensions := func(ext string) bool { return VALID_EXPORT_EXTENSIONS[ext] }
+	extensions := stringArrayToLookupFunction(ValidExportExtensions)
 	for _, library := range ctx.ImportedLibraries {
 		// Copy used libraries in the correct folder
 		libDir := libBaseFolder.Join(library.Name)