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scripts: test-zb-wait #838

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scripts: test-zb-wait #838

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654414f
scripts: test-zb waits for zb's lines instead of sleeping
fizzy-linux[bot] Oct 25, 2026
0b59e35
scripts: test-zb holds both slots before the third build, dumps state…
fizzy-linux[bot] Oct 25, 2026
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26 changes: 19 additions & 7 deletions scripts/test-zb.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -12,20 +12,33 @@ while [ ! -e "$T/go" ]; do sleep 0.1; done
exit \$(cat "$T/status" 2>/dev/null || echo 0)
FAKE
chmod +x "$T/zig"
unset FIZZY_BUILD_SKIP FIZZY_BUILD_WAIT
export FIZZY_BUILD_ZIG=$T/zig FIZZY_BUILD_SLOTS=2 FIZZY_BUILD_MAX_LOAD=100000 \
FIZZY_BUILD_SLOTS_DIR=$T/slots FIZZY_BUILD_POLL=0.2
fail() { echo "FAIL: $1"; exit 1; }
alive() { kill -0 "$1" 2>/dev/null; }
# poll <what> <file> <pattern>: poll for the pattern in the file (a slow runner is not a failure),
# failing after 20s with what the file held.
poll() {
i=0
while ! grep -q "$3" "$2" 2>/dev/null; do
i=$((i + 1))
[ $i -le 200 ] || fail "$1 never showed '$3' in $2 after 20s: $(cat "$2" 2>/dev/null) ran: $(cat "$T/ran" 2>/dev/null) slots: $(cat "$T"/slots/*/pid 2>/dev/null) env: $(env | grep FIZZY_BUILD | tr '\n' ' ')"
sleep 0.1
done
}

# Two builds hold the two slots; the third waits, then runs when they finish.
./zb build a >"$T/o1" 2>&1 & echo $! >>"$T/pids"
./zb build b >"$T/o2" 2>&1 & echo $! >>"$T/pids"
sleep 1
poll "builds a and b" "$T/ran" '^build b'
poll "builds a and b" "$T/ran" '^build a'
poll "slot 0 held" "$T/slots/slot.0/pid" '^[0-9]'
poll "slot 1 held" "$T/slots/slot.1/pid" '^[0-9]'
./zb build c >"$T/o3" 2>&1 & p3=$!; echo $p3 >>"$T/pids"
sleep 1
alive $p3 || fail "third build did not wait"
grep -q 'zb: waiting for a build slot' "$T/o3" || fail "no waiting line: $(cat "$T/o3")"
grep -q '^build c' "$T/ran" && fail "third build ran while both slots were held"
poll "third build" "$T/o3" 'zb: waiting for a build slot'
alive $p3 || fail "third build did not wait: $(cat "$T/o3") ran: $(cat "$T/ran")"
grep -q '^build c' "$T/ran" && fail "third build ran while both slots were held: $(cat "$T/ran")"
echo 3 >"$T/status"
touch "$T/go"
wait $p3; [ $? = 3 ] || fail "zig's exit status not passed on"
Expand Down Expand Up @@ -60,9 +73,8 @@ grep -q '^build i' "$T/ran" || fail "build i did not run"

# Over the load ceiling, a build waits (and says so) until it is lifted.
FIZZY_BUILD_MAX_LOAD=-1 ./zb build e >"$T/o5" 2>&1 & p5=$!; echo $p5 >>"$T/pids"
sleep 1
poll "build above the load ceiling" "$T/o5" 'waiting for load'
alive $p5 || fail "build ran above the load ceiling"
grep -q 'waiting for load' "$T/o5" || fail "no load line: $(cat "$T/o5")"
kill $p5

# Light commands pass straight through, and FIZZY_BUILD_SKIP bypasses the wait.
Expand Down
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