A short introduction to the use case:
I am using a docker
container to run my go
tests using go test ./...
. This can be achieved easily using docker exec <container> /bin/sh -c "go test ./..."
. Unfortunately go test ./...
runs across all subdirectories and I'd like to exclude one (the vendor directory).
The advised solution for this is using the following command: go test $(go list ./... | grep -v '<excluded>'
, somehow this leaves me with the following result:
docker run golang:1.6.2-alpine /bin/sh -c "go test "
(I have tested this on both run and exec, but they probably use the same core).
When I ssh into the container using docker exec -it <container_id> /bin/sh
and run the exact same command, it works like a charm.
It seems that executing shell commands trough the docker exec/run does not support any commands nested with $()
?
Best Answer
Your command may not be working as you expected thanks to a common bash gotcha:
The command you are trying to run will perform the expansion of the subshell
$()
on your host because it is inside double quotes.This can be solved by single quoting your command as suggested by @cuonglm in the question comments.
EDIT: A little demo