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Fix "File name too long" problem #602

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Merged
mikemccand merged 1 commit into from
Jul 30, 2026
+9 −8
Merged

Fix "File name too long" problem #602

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17 changes: 9 additions & 8 deletions src/python/competition.py
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,6 @@
import glob
import hashlib
import os
import platform
import random
import subprocess
import time
Expand Down Expand Up @@ -273,13 +272,15 @@ def getName(self):
name.append("nd%gM" % (self.numDocs / 1000000.0))
full_name = ".".join(name)

# On macOS, truncate if the name is too long for the 255-byte filename limit.
# Keep a prefix and append a short hash of the full name so it remains unique.
if platform.system() == "Darwin":
max_len = 200
if len(full_name) > max_len:
name_hash = hashlib.sha256(full_name.encode()).hexdigest()[:12]
full_name = full_name[:max_len] + "." + name_hash
# Truncate if the name is too long for the 255-byte filename limit.
# The JFR filename typically adds ~34 chars ("bench-index-baseline_vs_patch-" + ".jfr"),
# so the index name (including hash suffix) must stay under 255 - 34 = 221 chars.
max_name_len = 221
hash_len = 5
max_prefix = max_name_len - hash_len
if len(full_name) > max_name_len:
name_hash = hashlib.sha256(full_name.encode()).hexdigest()[:hash_len]
full_name = full_name[:max_prefix] + name_hash

return full_name

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