add URI.FindIn(SearchPath) to resolve relative paths

internal/folio/uri.go

@@ -57,6 +57,13 @@ func (u URI) Parse() data.URIParser {
 	return nil
 }
 
+func (u *URI) FindIn(s *SearchPath) {
+	if s == nil {
+		s = NewSearchPath(ConfigKey("system.importpath").GetStringSlice())
+	}
+	*u = s.FindURI(*u)
+}
+
 func (u URI) Exists() bool {
 	return transport.ExistsURI(string(u))
 }

internal/folio/uri_test.go

@@ -37,3 +37,13 @@ func TestURINewResource(t *testing.T) {
 
 }
 
+func TestURIFindIn(t *testing.T) {
+	searchPath := NewSearchPath(ConfigKey("system.importpath").GetStringSlice())
+	assert.Nil(t, searchPath.AddPath(string(TempDir)))
+	assert.Nil(t, TempDir.CreateFile("bar", "testdata"))
+	
+	var file URI = "file://bar"
+	file.FindIn(searchPath)
+	assert.True(t, file.Exists())
+	assert.Equal(t, string(file), fmt.Sprintf("file://%s/bar", TempDir))
+}