Ubuntu Packages

Here I try to list all of the installed ubuntu packages and give an explanation of why they are included. Lot's of these packages are installed into the ROOT official docker container and so I have copied them into this image. I have looked into their purpose by a combination of googling the package name and looking at ROOT's reason for them.

In the Dockerfile, most packages are added when they are needed for the rest of the build. Adding packages before they are needed means the container needs to be rebuilt starting from the point you add them, so it is a good habit to avoid doing so. There is a helper script installed in the container install-ubuntu-packages that can be called directly in the Dockerfile with a list of packages to install.

If you want to add additional packages that aren't necessary for building ldmx-sw, its dependencies, or the container environment use the install command at the end of the Dockerfile.

BEGIN {
    in_install=0;
}
{
  # check if this line is in an install command
  if (in_install && NF > 0) {
    # print out all entires on line except the line continuation backslash
    for (i=1; i <= NF; i++) {
      if ($i != "\\") {
        print $i;
      }
    }
  }
  # update for next lines if we are opening an install command or closing
  if ($0 ~ /^RUN install-ubuntu-packages.*$/) {
    in_install=1;
  } else if (NF == 0 || $1 == "RUN" && $2 != "install-ubuntu-packages") {
    in_install=0;
  }
}

awk -f docs/src/get-ubuntu-packages.awk Dockerfile