dockercontainerswindows-container

Appending to PATH in a Windows Docker container

I need to append to the PATH within a Windows Docker container, and I've tried many permutations.

ENV PATH=%PATH%;C:\\Foo\\bin
ENV PATH=$PATH;C:\\Foo\\bin
ENV PATH="%PATH%;C:\Foo\bin"
ENV PATH="$PATH;C:\Foo\bin"
RUN "set PATH=%PATH%;C:\Foo\bin"

None of these work: they don't evaluate the preexisting PATH variable.

What is the right syntax to append to the PATH? Can I even append to the PATH inside Docker? (I can on similar Linux containers)

Solution

  • Unfortunately ENV won't work, because windows environment variable work a little differently than linux. more info

    As of now the only way to do this is through RUN

    But you don't need to create a separate file to do this. This can be done by the following much simpler one line command:

    RUN setx path "%path%;C:\Foo\bin"