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22 lines
591 B
Bash
22 lines
591 B
Bash
# Wait until $condition is true, retrying every $intervalMs milliseconds.
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# Print a '.' character every second as a progress indicator.
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waitUntil() {
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condition=$1
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intervalMs=$2
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lastDotTime=$(getTimeMs)
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while ! { t0=$(getTimeMs); eval "$condition"; }; do
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now=$(getTimeMs)
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if ((now - lastDotTime >= 1000)); then
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printf .
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lastDotTime=$now
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fi
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toSleep=$((t0 + intervalMs - now))
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if ((toSleep > 0)); then
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sleep $((toSleep / 1000)).$((toSleep % 1000));
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fi
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done
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}
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getTimeMs() { date +%s%3N; }
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