xargs " --no-run-if-empty " does not exist on mac os about substra-tests HOT 4 CLOSED

Xargs no-run-if-empty mac

Ignore empty results for xargs in Mac OS X, Indeed, the BSD implementation of xargs doesn't have the -r flag ( --no-run-if-​empty ). The GNU version in Linux has it. Here's one way to work This is a behaviour of GNU xargs which can be supressed by using -r, --no-run-if-empty. The *BSD variant of xargs has this behavoir on default, so -r is not needed. Since FreeBSD 7.1 (released in january 2009) an -r argument is accepted (witch does nothing) for compatiblity reasons.

from substra-tests.

@Kelvin-M Can you confirm that on Mac this comment has no output?

echo -n "" | xargs -r echo toto

from substra-tests.

Nope, as written on my previous comment , -r and --no-run-if-empty do not exist on MacOs xargs implementation.
It's the default behavior

echo -n "" | xargs echo toto

has no output :)

from substra-tests.

Ah my mistake, thanks.

from substra-tests.