CODEWITHSUNDEEP
linuxbashdocker
GlaceCelery
GlaceCelery

Reputation: 1033

Shell command won't run in Docker build

When I am inside the container, the following works:

pip uninstall -y -r <(pip freeze)

Yet when I try to do the same in my Dockerfile like this:

RUN pip uninstall -y -r <(pip freeze)

I get:

------
 > [ 7/10] RUN pip uninstall -y -r <(pip freeze):
#11 0.182 /bin/sh: 1: Syntax error: "(" unexpected
------
executor failed running [/bin/sh -c pip uninstall -y -r <(pip freeze)]: exit code: 2

How do I re-write this command to make it happy?

Edit:

I am using this work around. Still interested in the one-liner answer however

RUN pip freeze > to_delete.txt
RUN pip uninstall -y -r to_delete.txt

Upvotes: 3

Views: 1683

Answers (1)

atline
atline

Reputation: 31564

The default shell for RUN is sh which looks not compatiable with above command.

You could change the shell for RUN to bash to make it work.

Dockerfile:

FROM python:3
SHELL ["/bin/bash", "-c"]
RUN pip install pyyaml
RUN pip uninstall -y -r <(pip freeze)

Execution:

$ docker build -t abc:1 .
Sending build context to Docker daemon   5.12kB
Step 1/4 : FROM python:3
 ---> da24d18bf4bf
Step 2/4 : SHELL ["/bin/bash", "-c"]
 ---> Running in da64b8004392
Removing intermediate container da64b8004392
 ---> 4204713810f9
Step 3/4 : RUN pip install pyyaml
 ---> Running in 17a91e8cc768
Collecting pyyaml
  Downloading PyYAML-5.4.1-cp39-cp39-manylinux1_x86_64.whl (630 kB)
Installing collected packages: pyyaml
Successfully installed pyyaml-5.4.1
WARNING: You are using pip version 20.3.3; however, version 21.2.4 is available.
You should consider upgrading via the '/usr/local/bin/python -m pip install --upgrade pip' command.
Removing intermediate container 17a91e8cc768
 ---> 1e6dba7439ac
Step 4/4 : RUN pip uninstall -y -r <(pip freeze)
 ---> Running in 256f7194350c
Found existing installation: PyYAML 5.4.1
Uninstalling PyYAML-5.4.1:
  Successfully uninstalled PyYAML-5.4.1
Removing intermediate container 256f7194350c
 ---> 10346fb83333
Successfully built 10346fb83333
Successfully tagged abc:1

Upvotes: 5

Related Questions