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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 8 слични објави

Пребарај: #tolkien

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Aesthetica

@Aetatesolis · Post #4033 · 21.03.2025 г., 12:36

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The Lord of the Rings 🎨 Darrell K. Sweet (🇺🇸, 1934-2011) Sweet was best known for providing cover art for science fiction and fantasy novels, in which capacity he was nominated for a Hugo Award in 1983. #tolkien #lotr AETATESOLIS

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Офис Почётного консула ЮАР в Екатеринбурге // Office of Honorary Consul of South Africa in Yekaterinburg

@sarconsulurals · Post #2976 · 03.01.2026 г., 04:16

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🗓January 3 marks the birth of J.R.R. Tolkien (1892-1973), the legendary author of The Lord of the Rings and The Hobbit. 📍 He was born in Bloemfontein, now the capital of South Africa’s Free State province and the country’s judicial capital 🇿🇦📚 👨‍💼 Tolkien’s father, Arthur Tolkien, worked as a banker and was transferred from the United Kingdom to Bloemfontein for career advancement. The family’s African servants considered baby John exceptionally handsome and admired him greatly. 👶 On one occasion, a servant named Isaak took the infant Tolkien to his kraal for the night to introduce him to his family. Years later, he named his first son Isaak Mister Tolkien Victor in the child’s honor. ✈️ When Tolkien was three, he traveled to England with his mother Mabel and younger brother Hilary. During their stay, Arthur Tolkien died in Bloemfontein from acute rheumatic fever. The family never returned to South Africa after his death. 🧠 Tolkien later said he remembered very little of his early years in South Africa. Biographers note that he retained a few words of Afrikaans, though he was not fluent. 🏨 Today, Bloemfontein proudly highlights its link to Tolkien. The four-star Hobbit Boutique Hotel promotes itself as his birthplace, features a commemorative plaque, and names all its rooms after characters from The Lord of the Rings and The Hobbit. #Literature#Books#History#Tolkien#SouthAfrica#Africa

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Aesthetica

@Aetatesolis · Post #3798 · 21.01.2025 г., 17:32

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Der Berggeist 🎨 Josef Madlener (🇩🇪, 1881-1967) Der Berggeist is "The Mountain Spirit". According to Carpenter, Tolkien bought the postcard during his trip to Europe. The envelope containing it was later found with the inscription: "Origin of Gandalf". However, the picture was painted about 1925-1930 and if I remember correctly the postcard was published 1935 in a folder with three or four other pictures. So the postcard must come by another way into Tolkien's hands. #tolkien#gandalf #lotr Source AETATESOLIS

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