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Add --build-mode CLI option for synth_only builds #151

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Merged
robtaylor merged 1 commit into from
Dec 16, 2025
Merged

Add --build-mode CLI option for synth_only builds #151

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11 changes: 11 additions & 0 deletions chipflow/platform/silicon_step.py
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Original file line number Diff line number Diff line change
Expand Up @@ -89,6 +89,11 @@ def build_cli_parser(self, parser):
"--wait",
help="Maintain connection to cloud and trace build messages. Filtering is based on the log level (see `verbose` option).",
default=False, action="store_true")
submit_subparser.add_argument(
"--build-mode",
help="Build mode: 'full' (default) runs complete build with P&R, GDS, LVS; 'synth_only' runs synthesis only.",
choices=["full", "synth_only"],
default=None)

def run_cli(self, args):
# Import here to avoid circular dependency
Expand Down Expand Up @@ -148,6 +153,12 @@ def submit(self, rtlil_path, args):
if chipflow_backend_version:
data["chipflow_backend_version"] = chipflow_backend_version

# Build mode: "full" (default) or "synth_only"
# Can be set via CLI argument or CHIPFLOW_BUILD_MODE environment variable
build_mode = getattr(args, 'build_mode', None) or os.environ.get("CHIPFLOW_BUILD_MODE")
if build_mode:
data["build_mode"] = build_mode

pads = {}
for iface, port in self.platform._ports.items():
width = len(port.pins)
Expand Down
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