One important tip is that the commands under a target each run sequentially, but... | Hacker News

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pkkim on Aug 18, 2017 | parent | context | favorite | on: Afraid of Makefiles? Don't be

One important tip is that the commands under a target each run sequentially, but in separate shells. So if you went to set env vars, cd, activate a Python virtualenv, etc to affect the next command, you need to make them a single command, like:

  target:
      cd ./dir; ./script.sh

vortico on Aug 18, 2017 | [–]

    cd dir && \
        ./script.sh && \
        ./otherstuff.sh

handles errors, in case `dir` doesn't exist for example.

cmm on Aug 18, 2017 | [–]

There's .ONESHELL for that (as long as we are talking about GNU Make)

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