TGINSIGHT SIMILAR POSTS
Изворен канал @pythonotes · Post #411 · 9 фев.
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
Пребарај: #smrt
@sgmrt · Post #2401 · 25.07.2025 г., 02:59
Train services on the North-South, East-West, Circle & Thomson-East Coast Lines, and some bus services will be extended on the eve of National Day, 8 Aug 2025 (Fri) (after midnight*). See poster for more info! 🇸🇬*Except Circle Line, due to temporary early closure.#SMRThttps://bit.ly/4o5W1RD - SMRT
Hashtags
@sgmrt · Post #2289 · 25.03.2025 г., 04:24
Train services on the North-South, East-West, Circle & Thomson-East Coast Lines, and some bus services will be extended for commuters travelling late on the eve of Hari Raya Puasa, 30 Mar 2025 (after midnight). Refer to the poster for more info. #SMRThttps://bit.ly/4lcEuGe - SMRT
Hashtags
@sgmrt · Post #1773 · 25.08.2023 г., 07:03
Train services on the 🚊 North-South, East-West, Circle & Thomson-East Coast Lines, and some 🚍 bus services will be extended for commuters travelling late during the Formula 1 Grand Prix on 15 - 17 Sep (Fri - Sun). 🏁🏎 See the poster for more info. 👀#SMRThttps://bit.ly/45pBZrD - SMRT
Hashtags
@sgmrt · Post #1758 · 25.07.2023 г., 02:08
Onward as one!🦁 Train services on the 🚊North-South, East-West, Circle & Thomson-East Coast Lines, and some 🚍bus services will be extended for commuters travelling late on the eve of National Day (8 Aug). 🇸🇬💗 Ref to the poster for more info. 👀#SMRThttps://bit.ly/3O5oUfJ - SMRT
Hashtags
@sgmrt · Post #2406 · 29.07.2025 г., 02:44
Train services on the 🚆 North-South, East-West, Circle & Thomson-East Coast Lines, and some 🚍 bus services will be extended for commuters travelling late on the eve of National Day, 8 Aug 2025 (Fri). 🇸🇬Please refer to the poster for more info. 👀#SMRT#AllAboutTrainshttps://bit.ly/4lTHYxg - SMRT
Hashtags
@sgmrt · Post #2405 · 29.07.2025 г., 02:39
Train services on the 🚆 North-South, East-West, Circle & Thomson-East Coast Lines, and some 🚍 bus services will be extended for commuters travelling late on the eve of National Day, 8 Aug 2025 (Fri). 🇸🇬Please refer to the poster for more info. 👀#SMRT#AllAboutTrains - SMRT
Hashtags
@sgmrt · Post #2354 · 26.05.2025 г., 09:04
Train services on the North-South, East-West, Circle & Thomson-East Coast Lines, and some bus services will be extended for commuters travelling late on the eve of Hari Raya Haji, 6 Jun 2025 (Fri) (after midnight). Refer to the poster for more info. #SMRT#AllAboutTrainshttps://bit.ly/4kcRGdi - SMRT
Hashtags
@sgmrt · Post #2334 · 06.05.2025 г., 09:59
Train services on the North-South, East-West, Circle & Thomson-East Coast Lines, and some bus services will be extended for commuters travelling late on the eve of Vesak Day, 11 May 2025 (Sun) (after midnight). Refer to the poster for more info. #SMRT#AllAboutTrainshttps://bit.ly/4k8NOtm - SMRT
Hashtags
@sgmrt · Post #2230 · 22.01.2025 г., 03:44
Train services on the North-South, East-West, Circle & Thomson-East Coast Lines, and some bus services will be extended for commuters travelling late on the eve of Chinese New Year, 28 Jan (after midnight). See poster for more info.🧧#SMRT#AllAboutTrains#AllAboutBuseshttps://bit.ly/4g6JEzO - SMRT
@sgmrt · Post #2157 · 17.10.2024 г., 03:09
Train services on NSEWL, CCL, TEL and some bus services will be extended for commuters travelling late on the eve of Deepavali, 30 Oct 2024 (Wed). 🪔 See the poster for more info! 👀#SMRT#AllAboutTrains#AllAboutBuseshttps://bit.ly/4dKOXni - SMRT
@sgmrt · Post #1947 · 31.05.2024 г., 02:09
Train services on the North-South, East-West, Circle & Thomson-East Coast Lines, and some bus services will be extended for commuters travelling late on the eve of Hari Raya Haji, 16 Jun 2024 (after midnight). Ref to the poster for more info. #SMRT#AllAboutTrains#AllAboutBuseshttps://bit.ly/4bWEkx9 - SMRT
@sgmrt · Post #1902 · 04.04.2024 г., 02:29
Train services on North-South, East-West, Circle & Thomson-East Coast Lines, and some bus services will be extended for commuters travelling late on eve of Hari Raya Puasa, 9 Apr 2024 (after midnight). Ref to the poster for more info. #SMRT#AllAboutTrains#AllAboutBuseshttps://bit.ly/3vLtQRF - SMRT