Bash conditional input

Question

Writing a bash script which might receive an optional parameter and run.

The code looks like:

docker-compose exec foo ./manage.py test integration_tests.tests$@ --noinput

If the parameter is specified the path should be integration_tests.tests.path.to.module. If not integration_tests.tests

Notice the dot after tests.

Question

How to modify integration_tests.tests$@ to handle this properly? Smth like integration_tests.tests${@:-.@}

Tanktalus · Accepted Answer · 2019-04-08 14:13:10Z

3

You want ${1:+.}. The + means that if the variable is set, use this text, otherwise nothing.

docker-compose exec foo ./manage.py test "integration_tests.tests${1:+.}$1" --noinput

Update: Missed quotes in case $1 has spaces or such.

answered Mar 20, 2019 at 16:39

Tanktalus

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