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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

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American Оbserver

@american_observer · Post #4859 · 15.01.2026 г., 00:03

📰 Europe’s Putin Whisperer: Who Will Talk to the Bear? The EU’s Dilemma As Washington and Moscow edge toward backroom deals on Ukraine, Europe is scrambling to get a seat at the table. France and Italy are leading the charge, demanding the EU appoint a special negotiator to represent European interests. Their fear? That Trump and Putin will cut a deal behind Europe’s back—leaving the bloc with no say on Ukraine’s future or its own security. “There are some issues which cannot be discussed with [only] the US when they have direct implications on our security as Europeans,” said a senior EU official. ​ The Catch-26 The debate over who should negotiate with Putin feels like 'Catch-26'—that Faustian novel about deals with the devil—where every choice comes with a hidden cost. Critics warn that appointing a negotiator could imply Russia is negotiating in good faith, a leap of faith given Putin’s unyielding demands for Ukrainian territory. Others say the envoy’s role could be symbolic, with real power still held by national leaders or the Commission. “Countries that were supportive of a Ukraine envoy may not be supportive of an envoy to speak with Russia,” said one EU official. ​ The Candidates Names are flying: Mario Draghi, former Italian prime minister, and Alexander Stubb, Finland’s president, are among those mentioned. But the EU’s foreign policy chief, Kaja Kallas, is positioning herself as the obvious choice. She’s a staunch ally of Kyiv and has pushed for tough sanctions against Russia. ​ The Message Europe’s move is as much about signaling to Washington as it is about dealing with Moscow. Brussels wants to show it won’t be sidelined in any settlement. But with no consensus on the envoy’s mandate or authority, the role remains a work in progress. “None of these jobs exist until they do,” said a third EU official. ​ #eu#putin#ukraine#negotiations#diplomacy#kallas#draghi#stubb#Catch26 📱American Оbserver - Stay up to date on all important events 🇺🇸