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
🔥Airdrop - Bluefin x OKX Cryptopedia ✅
💰Total Reward: $605,000+ worth of tokens — including $550K in BLUE + $55K in SUI — up for grabs through Cryptopedia Season 38
☀️Airdrop Link :- Click Here
⚙️How to Participate?
♦️Connect your OKX Wallet (SUI Network)
♦️Complete all tasks within the Bluefin campaign on Cryptopedia
♦️Verify your actions to be eligible
♦️Tasks are simple and interactive — don’t miss out
🎁Eligible participants will earn a share of 605,000 USDT in token rewards
📆Campaign Ends: 6 September 2025 – 7:00 AM UTC
📌Explore DApps, complete missions, and earn rewards this is Web3 made fun and rewarding
🔗 Source: https://x.com/wallet/status/1943597905996034069
®Note - Please do your own research (DYOR) before joining to any airdrops project, also airdrop is 100% free. Don't send any fee or penny for receiving airdrop tokens required
#OKX#Bluefin#Cryptopedia#Airdropcomic#Web3Rewards
📰 CRYPTO NEWS
🆕️The founder and CEO of #CryptoQuant stated that compared to the previous cyclical peak, the fundamental elements of the bitcoin network can maintain a market value three times higher than the current one. He considers it "possible" to "keep" the bitcoin price at $265,000.
🆕️As part of the presale, #WATER raised $41 million. Which also makes WATER the largest Memecoin pre-sale to date, with over 26,000 wallets participating. The team has regained control of its account in X.
🆕️50 Cent's #Twitter account was hacked in order to promote the Solana Meme Coin.
🆕️Internet Computer will launch the #ICP Hub Accelerator Program 2024, which aims to help early blockchain projects transform their concepts into market solutions, create a strong blockchain innovation ecosystem and promote technological progress in the ICP community.
🔹 21 million #LINKS ($295 million) of non-convertible Chainlink contracts have been unblocked today.
🆕️DAO Osmosis supports a commission-free bridge for transferring bitcoin to the #Cosmos ecosystem.
🆕️Scroll ZKP presents "Scroll Sessions", a loyalty program to reward the Scroll Marks community for their participation and involvement in the #Scroll ecosystem.
🆕️Arbitrum introduces the "Layer Leap", a single-stage bridge from L1 to L3 for the #Orbit ecosystem.
🆕️#Reef plans to launch a new product on June 26.
‼️ Dogwifhat Whales dropped #WIF by 16 million in a week.
🆕️#Fantom has released #Sonic's third management offering, which includes an annual token destruction mechanism, as well as the launch of Sonic Spark and Sonic University.
🆕️#Bluefin announces integration with Wormhole Connect. The Wormhole community will participate in the future release of Bluefin tokens.
🆕️#StacksNakamoto has announced the completion of 90% of the work on the project and is preparing for the official launch on July 15. The Nakamoto Stacks update should increase the transaction speed to 5-10 seconds, which is about 100 times faster than the current speed. ➡️ This is a significant event for the Stacks project and the Bitcoin ecosystem, will improve the speed, overall efficiency and scalability of Layer2 on #Bitcoin, promising faster and more efficient transactions for users.