feat(tapac): add options to use pyslang

tapa/__main__.py

@@ -20,7 +20,7 @@
 from tapa.steps.pack import pack
 from tapa.steps.synth import synth
 from tapa.steps.version import version
-from tapa.util import setup_logging
+from tapa.util import Options, setup_logging
 
 _logger = logging.getLogger().getChild(__name__)
 
@@ -54,17 +54,26 @@
     metavar="limit",
     help="Override Python recursion limit.",
 )
+@click.option(
+    "--enable-pyslang / --disable-pyslang",
+    type=bool,
+    default=False,
+    help="Enable or disable pyslang (experimental).",
+)
 @click.pass_context
-def entry_point(
+def entry_point(  # noqa: PLR0913,PLR0917
     ctx: click.Context,
     verbose: bool,
     quiet: bool,
     work_dir: str,
     recursion_limit: int,
+    enable_pyslang: bool,
 ) -> None:
     """The TAPA compiler."""
     setup_logging(verbose, quiet, work_dir)
 
+    Options.enable_pyslang = enable_pyslang
+
     # Setup execution context
     ctx.ensure_object(dict)
     switch_work_dir(work_dir)

tapa/util.py

@@ -39,6 +39,12 @@
 AST_IOPort = Input | Output | Inout
 
 
+class Options:
+    """Global configuration options."""
+
+    enable_pyslang: bool = False
+
+
 class PortInfo:
     """Port information extracted from a Verilog module definition."""