hplip support

[sakana280]

This is tested to work on an ODroid HC2 (--platform linux/arm/v7). Not sure if this would be better as a separate docker referencing scanservjs-core?

[sbs20]

How about, instead of here, adding something like this to the end...

# hplib image
#
# This image adds the HP scanner libs to the image.
# ==============================================================================
FROM scanservjs-core AS scanservjs-hplib
RUN apt-get install -yq \
    libsane-hpaio \
  && apt-get clean \
  && rm -rf /var/lib/apt/lists/* \
  && echo hpaio >> /etc/sane.d/dll.conf

It won't get included by default but allows users to build their own by specifying target. There could be a similar approach for brother images. I haven't tested this but assume it would work.

[sakana280]

Thanks Sam, i've made that change now and created a versioned multi platform build on dockerhub. I've added some notes to the readme on my fork so it can standalone, so you won't want all the changes verbatim from that branch. Shall i close this PR now?

[sbs20]

This is very cool - I've simply not had time to look at this before.

So by adding

     - name: Set up QEMU for multi-platform build
        uses: docker/setup-qemu-action@v1

and

          platforms: linux/amd64,linux/arm64,linux/arm/v7

The workflow magically takes care of multi-platform builds yes?

Then there's the other stuff related to the hplib.

Thank you for taking the time to do this. It also gives us a way of dealing with brother scanners.

[sakana280]

Yes those 3 extra lines give the cross platform builds. It takes about 30mins to build all 3.

[sbs20]

Thank you so much for this. I have integrated the multi architecture builds (which is a huge bonus!) and added the hplib target. That target is not built by default but at least your custom build is smaller now.

[sakana280]

Thanks for integrating this, and for all the work you've put into this amazing project :)