How to use virtualenv in makefile

Question

I want to perform several operations while working on a specified virtualenv.

For example command

make install

would be equivalent

Answer 1

In make you can run a shell as command. In this shell you can do everything you can do in a shell you started from comandline. Example:

install:
    ( \
       source path/to/virtualenv/bin/activate; \
       pip install -r requirements.txt; \
    )

Attention must be paid to the ;and the \.

Everything between the open and close brace will be done in a single instance of a shell.