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Add check for existing coverage files to merge_coverage function (mod… #1210

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Add check for existing coverage files to merge_coverage function (mod… #1210

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5 changes: 5 additions & 0 deletions vunit/sim_if/modelsim.py
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Original file line number Diff line number Diff line change
Expand Up @@ -881,6 +881,11 @@ def merge_coverage(self, file_name, args=None):
if args is None:
args = []

# Check if at least one valid coverage file exists.
if not any(file_exists(f) for f in self._coverage_files):
LOGGER.warning("No existing coverage files found. Skipping coverage database creation.")
return

coverage_files = str(Path(self._output_path) / "coverage_files.txt")
vcover_cmd = [str(Path(self._prefix) / "vcover"), "merge", "-inputs"] + [coverage_files] + args + [file_name]
with Path(coverage_files).open("w", encoding="utf-8") as fptr:
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