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Изворен канал @pythonotes · Post #411 · 9 фев.

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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

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Пронајдени 6 слични објави

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Venture Village Wall 🦄

@venturevillagewall · Post #3605 · 20.12.2024 г., 18:00

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K33 Predicts Bull Run Peak Date 📈 K33 analysts forecast the peak date of the bull run. ⚖️ Craig Wright receives a conditional sentence for contempt of court. 💵 VC investors are retreating from crypto as the market shifts. 📊 Bitcoin's failure at $100K triggered over $1 billion in liquidations. 🐋 El Salvador expands Bitcoin purchases despite IMF deal. 💬 Tornado Cash co-founder demands dismissal of charges. 👾 Ilya Lichtenstein claims sole responsibility for Bitfinex hack. 💰 Cryptopia clients received $225 million in assets from liquidators. ✅ SEC approves first hybrid ETFs based on Bitcoin and Ethereum. 👁 German regulator orders World to delete user data. 👀 Investors file a lawsuit against the HAWK token team. ⚽️ American football player to receive part of salary in Bitcoin. 🚀 Cathie Wood confirms Bitcoin price prediction above $1 million. #K33#CraigWright#Crypto#Bitcoin#Liquidations#ElSalvador#TornadoCash#Bitfinex#Cryptopia#SEC#ETFs#Germany#HAWK#Football#CathieWood#Investors#Funding#VentureCapital#Market#Investments

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#k33#craigwright#crypto#bitcoin#liquidations#elsalvador#tornadocash#bitfinex#cryptopia#sec#etfs#germany#hawk#football#cathiewood#investors#funding#venturecapital#market#investments
Venture Village Wall 🦄

@venturevillagewall · Post #3602 · 20.12.2024 г., 17:03

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Crypto Highlights: Recent Developments 📈 K33 analysts have predicted the peak date of the bull run. ⚖️ Craig Wright received a conditional sentence for contempt of court. 💵 VC investors are leaving crypto, while crypto distances itself from VC investors. 📊 A Bitcoin crash at $100,000 led to over $1 billion in liquidations. 🐋 El Salvador expanded its Bitcoin purchases despite an IMF deal. 💬 Tornado Cash co-founder demands charges be dropped. 👾 Ilya Lichtenstein claims sole responsibility for the Bitfinex hack. 💰 Cryptopia clients received $225 million in assets from liquidators. ✅ SEC approved the first hybrid ETFs based on Bitcoin and Ethereum. 👁 German regulator ordered World to delete user data. 👀 Investors sued the team behind the HAWK token. ⚽️ An American football player will receive part of his salary in Bitcoin. 🚀 Cathy Wood confirmed her Bitcoin price prediction exceeds $1 million. 🤑 Colin Wu shared the success story of a 24-year-old crypto trader. #K33#CraigWright#VC#Bitcoin#Liquidation#ElSalvador#TornadoCash#Bitfinex#Cryptopia#SEC#ETFs#Germany#HAWK#Football#CathyWood#CryptoTrader#CryptoNews#Investments#MarketTrends#CryptoRegulation#Blockchain

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#k33#craigwright#vc#bitcoin#liquidation#elsalvador#tornadocash#bitfinex#cryptopia#sec#etfs#germany#hawk#football#cathywood#cryptotrader#cryptonews#investments#markettrends#cryptoregulation#blockchain