Monorepo for Aesthetic.Computer
aesthetic.computer
build-name: add 3-char hex suffix so builds never collide
The old script's header comment advertised names like "swift-otter-7a3"
but the actual code only emitted "swift-otter" with no suffix. Same
commit at a matching epoch-modulo-365 second would produce identical
names (e.g., two rebuilds of the same commit within a minute → two
"sunlit-butte" builds).
Fixes:
- Append a 3-char base-36 suffix derived from git hash bytes + current
nanoseconds. Five back-to-back runs now produce:
sunlit-prism-e83 / f95 / e94 / eb2 / f69
- Also mix git hash into the animal index so two different commits at
the same epoch second pick different animals.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
+17
-3
+17
-3
fedac/native/scripts/build-name.sh
+17
-3
fedac/native/scripts/build-name.sh
···
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NUM_ANIMALS=${#ANIMALS[@]}
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NUM_ADJ=${#ADJECTIVES[@]}
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-
# Mix git hash + epoch for a unique name every build
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+
# Mix git hash + epoch + nanoseconds for a unique name every build
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GIT_HASH=$(git rev-parse HEAD 2>/dev/null || echo "0000000000000000000000000000000000000000")
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EPOCH=$(date +%s)
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+
NANO=$(date +%N 2>/dev/null || echo 0)
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# Adjective from git hash, animal from epoch (so same commit gets different animals)
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HEX_ADJ="${GIT_HASH:0:8}"
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DEC_ADJ=$(printf '%d' "0x${HEX_ADJ}" 2>/dev/null || echo 0)
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ADJ_IDX=$(( DEC_ADJ % NUM_ADJ ))
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-
ANIMAL_IDX=$(( EPOCH % NUM_ANIMALS ))
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+
# Mix epoch + first 4 hex of git hash into the animal index so the same
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+
# epoch-second but different commits still pick different animals.
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+
HEX_ANIMAL="${GIT_HASH:8:4}"
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+
DEC_ANIMAL=$(printf '%d' "0x${HEX_ANIMAL}" 2>/dev/null || echo 0)
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+
ANIMAL_IDX=$(( (EPOCH + DEC_ANIMAL) % NUM_ANIMALS ))
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-
echo "${ADJECTIVES[$ADJ_IDX]}-${ANIMALS[$ANIMAL_IDX]}"
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+
# 3-char suffix to prevent name collisions across rebuilds of the same
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+
# commit or near-simultaneous builds. Combine last 3 digits of nanoseconds
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+
# with first 3 hex chars of git hash for a 5-char base-36 stamp.
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+
HEX_SUFFIX="${GIT_HASH:12:3}"
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+
NANO_TAIL="${NANO: -3}"
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+
# Compose into a 3-char base-36 suffix
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+
SUFFIX_NUM=$(( (0x${HEX_SUFFIX} + 10#${NANO_TAIL}) % 46656 )) # 36^3
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+
SUFFIX=$(printf '%03x' "$SUFFIX_NUM")
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+
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+
echo "${ADJECTIVES[$ADJ_IDX]}-${ANIMALS[$ANIMAL_IDX]}-${SUFFIX}"