@import with relative URIs need base URI to resolve against

[yagee-de]

I wrote a CustomImporter to retrieve a SASS file URL. It all works well. But there is no way to support paths starting with "../" in import statements, as I don't have any clue what the URL of the importing SASS file is at this point.

dart-sass-java should give a reference to the importing document, like in jsass: https://gitlab.com/jsass/jsass/-/blob/master/src/main/java/io/bit3/jsass/importer/Importer.java

[yagee-de]

From sass.embedded_protocol.EmbeddedSass.InboundMessage.CompileRequest you can reconstruct this information and forward it to the Importer:

    private String getCompileSource(CompileRequest compileRequest) throws IOException {
        final CompileRequest.InputCase inputCase = compileRequest.getInputCase();
        try {
            if (inputCase == CompileRequest.InputCase.PATH) {
                return new File(compileRequest.getPath()).toURI().toURL().toString();
            }
            if (inputCase == CompileRequest.InputCase.STRING) {
                return compileRequest.getString().getUrl();
            }
        } catch (MalformedURLException mue) {
            throw new IOException(mue);
        }
        return null;
    }

[larsgrefer]

Can you provide a complete example which reproduces your problem?