make regexp more specific, add test

Author: dennisppaul

internal/arduino/builder/internal/detector/detector.go

@@ -478,7 +478,7 @@ func (l *SketchLibrariesDetector) failIfImportedLibraryIsWrong() error {
 }
 
 // includeRegexp fixdoc
-var includeRegexp = regexp.MustCompile(`(?ms)[<"'](\S+)[">']`)
+var includeRegexp = regexp.MustCompile(`#include[ \t]*[<"](\S+)[">]`)
 
 // IncludesFinderWithRegExp fixdoc
 func IncludesFinderWithRegExp(source string) string {

internal/arduino/builder/internal/detector/detector_test.go

@@ -75,3 +75,13 @@ func TestIncludesFinderWithRegExpPaddedIncludes4(t *testing.T) {
 
 	require.Equal(t, "register.h", include)
 }
+
+func TestIncludesFinderWithRegExpPaddedIncludes5(t *testing.T) {
+	output := "/some/path/sketch.ino:23:42: fatal error: 'Foobar.h' file not found" +
+              "   23 | #include \"Foobar.h\"" +
+              "      |          ^~~~~~~~~~"
+
+	include := detector.IncludesFinderWithRegExp(output)
+
+	require.Equal(t, "Foobar.h", include)
+}