GNU/Linux Desktop Survival Guide by Graham Williams
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MLHub Dependencies

20200221 Within the MLHUB.yaml file dependencies can be listed.

To install a system dependency

dependencies:
  system:
    - atril         # apt install atril

To install a system python package, for example python3-opencv:

dependencies:
  python3:
    - opencv        # apt install python3-opencv

For a Python package installed from pipy:

description:
  pip3:
    - pyfakewebcam  # pip3 install pyfakewebcam

For R package dependencies if a package needs to be installed then it will be installed into ˜/.mlhub/pkg/R/. In this way the installation of particular versions of a package will not interfere with any system or user installed versions of packages for other applications.

dependencies: 
  cran: 
    - rpart         # install.packages("rpart")
    - rattle=5.2.0  # devtools::install_version("rattle", version="5.2.0")

File dependencies in the simplest case install files from the git repository onto the local installation of the package base directory (˜/.mlhub/pkg/):

dependencies:
  files:
    - docs/README.md  # Install from github as README.md in base directory. 
    - demo.R          # Install from github as demo.R in base directory.

Arbitrary files can be downlaoded from the Internet and renamed/saved locally:

dependencies:
  files:
    - https://www.wayoutback.com.au/assets/Uploads/Uluru.jpg: cache/images/uluru.jpg
    - https://www.wayoutback.com.au/assets/Uploads/Uluru.jpg: cache/images/