System dependencies as build options/arguments about openfaas-rstats-templates

[psolymos]

Decided to go with the build argument in the README file, but as the docs say, it is less preferred when e.g. multiple functions are described in the same stack YAML file.

When going the build option route, here is the recipe:

edit the /templates/<template-name>/template.yml file:

language: rstats
fprocess: Rscript index.R
build_options:
  - name: dev
    packages:
      - git-core
      - libssl-dev
      - libcurl4-gnutls-dev

Then call faas-cli new then

faas-cli up -f hello-rstats.yml --build-option dev

Note: both build options and build arguments have been tested and are working as expected: installing system dependency packages during build.

[psolymos]

Should we support different build options out of the box? E.g. tidyverse, geospatial (as in rocker equivalents)?

Not: it is easier to change the base image in the /templates/<template-name>/Dockerfile (e.g. rocker/r-base to rocker/geospatial).