reload_flag=""
if [[ -n "${DEBUG}" ]]; then
reload_flag="--reload"
fi
if [[ -n "${WORKER_COUNT}" ]]; then
workers=${WORKER_COUNT}
else
workers=2
fi
gunicorn --workers ${workers} \
--bind 0.0.0.0:8000 \
${reload_flag} main.wsgi
Писали такие конструкции чтобы проверить наличие флага и сформировать команду правильно?
На самом деле можно сделать тоже самое проще. Для этого используются операторы условной подстановки, доступные в оболочках семейства POSIX.
:- для установки значений по умолчанию
${WORKER_COUNT:-2}
Если переменная не объявлена, то будет дефолтное значение 2.
:+ подставляет указанный текст, если переменная не пуста
${DEBUG:+--reload}
Если что-то есть в переменной то распечатается текст после символа +, в противном случае - ничего. Удобно для опциональных флагов, как в нашем примере.
Итого наш скрипт может выглядеть так:
gunicorn --workers ${WORKER_COUNT:-2} \
--bind 0.0.0.0:8000 \
${DEBUG:+--reload} main.wsgi
Есть еще два оператора.
:= не только подставить дефолтное значение, но и присвоить его переменной, если она пуста
# никаких переменных еще нет
VAL1=${VAL2:=hello}
# теперь доступны обе
echo $VAL1 $VAL2
# hello hello
:? остановить выполнение с ошибкой, если переменной нет.
echo ${MISS:?is required}
bash: MISS: is required
Код выхода будет 1.
#tricks#linux
🪐 In the galaxy SDSS J1356+1026, astronomers have witnessed a colossal bubble of gas over 30,000 light-years wide being blown outward from the galaxy’s core. This bubble is powered by fierce winds from a supermassive black hole as it devours material, creating giant outflows that glow in X-ray and optical light—a real-life example of black holes shaping their host galaxies through dramatic, large-scale eruptions. ✨
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Hyperliquid Faces Major Fund Exodus
🔵 Hyperliquid experienced a massive outflow of approximately $250 million following claims from a researcher about hacks allegedly linked to North Korea. Despite this, Hyperliquid reassured that user funds are secure and no vulnerabilities were found.
Source
#Hyperliquid#Outflow#Hack#NorthKorea#Funds#Security#Crypto#Web3
🚀 XRP Spot ETF Experiences Significant Outflow
According to Odaily, data from SoSoValue indicates that on April 9, Eastern Time, the XRP spot ETF saw a net outflow of $661,200. The 21Shares XRP ETF (TOXR) was the only fund to experience this outflow, contributing to a historical total net outflow of $25.845 million.
As of the time of reporting, the total net asset value of the XRP spot ETF stands at $955 million, with an XRP net asset ratio of 1.15%. The historical cumulative net inflow has reached $1.21 billion.
#XRP#SpotETF#Outflow#Cryptocurrency#21Shares#TOXR#NetAssetValue#CryptoNews
🚀 XRP Spot ETFs See Significant Inflows and Outflows
XRP spot ETFs experienced notable financial movements last week, with a net inflow of $11.75 million, according to Odaily. The data, sourced from SoSoValue, covers the trading days from April 6 to April 10 (Eastern Time).
The Bitwise ETF XRP led the inflows, attracting $9.5154 million, bringing its historical total net inflow to $388 million. Following this, the Franklin ETF XRPZ saw a weekly net inflow of $2.8987 million, with its historical total reaching $324 million.
Conversely, the 21Shares ETF TOXR recorded the highest net outflow, amounting to $661,200, with its historical total net outflow standing at $25.85 million.
As of the latest update, the total net asset value of XRP spot ETFs is $968 million, with an ETF net asset ratio of 1.16% compared to XRP's total market capitalization. The cumulative historical net inflow has reached $1.22 billion.
#XRP#ETFs#Crypto#Inflow#Outflow#Bitwise#Franklin#21Shares#NetAssetValue#MarketCap