sudo yum install or reinstall

Question

I am deploying my nodejs app via EB onto a Linux EC2 and in the .ebextensions I need to install a font package and I must use yum:

container_commands:
  01_getfont: 
    command: sudo yum -y install http://li.nux.ro/download/nux/dextop/el7/x86_64/webcore-fonts-3.0-1.noarch.rpm

Unfortunately, while that works for the 1st time, it does not work for the 2nd time if I re-deploy again it will complain the package is there already.

So what I do is to use this:

command: sudo yum -y reinstall http://li.nux.ro/download/nux/dextop/el7/x86_64/webcore-fonts-3.0-1.noarch.rpm

Unfortunately, while that works for the 2nd times and so on, it does not work for the 1st time if the package is not there, giving the error:

Error: Problem in reinstall: no package matched to remove.

This is driving me nuts.

Is there a way around this? Not really good at Linux bash script, can I like if 1st time use this command else that command?

I can create a bash script:

    #!/bin/bash

    sudo yum -y install http://li.nux.ro/download/nux/dextop/el7/x86_64/webcore-fonts-3.0-1.noarch.rpm

and so on...

Answer 1

Since you mentioned running a shell script is possible then it should be fairly easy to handle:

webcore_install.sh

#!/bin/bash

function isinstalled {
  status=$?
  if [[ $status -eq 0 ]]; then
    # reinstall if already present
    sudo yum -y reinstall http://li.nux.ro/download/nux/dextop/el7/x86_64/webcore-fonts-3.0-1.noarch.rpm
  else
    # install if not present
    sudo yum -y install http://li.nux.ro/download/nux/dextop/el7/x86_64/webcore-fonts-3.0-1.noarch.rpm
  fi
}

yum -C list installed "$@"
isinstalled

Then your command could look something like this:

sudo ./path/to/webcore_install.sh webcore-fonts-3.0-1

You might need to change the permissions on the shell script also:

chmod +x webcore_install.sh