TIL - interactive shell script
TIL, Today I Learned, is more of a "I just figured this out: here are my notes, you may find them useful too" rather than a full blog post
Tody I saw this line in a script:
1INTERACTIVE="" && [[ -t 0 ]] && INTERACTIVE="-it"that later on started a container:
1docker run --rm ${INTERACTIVE} -v "${PWD}":/home/br-user \
2 --user "$(id -u)":"$(id -g)" \
3 myproject/docker "${@}"It tests if STDIN is opened on a terminal and in that case set $INTERACTIVE to -ti to start the container with an interactive shell.
I usually don't make a difference in how the behavior of a script depends on how it is started, I don't really like such things it at all, but I can still see that it has its advantages.
From the manual of test [1]:
-t FD file descriptor FD is opened on a terminal