Download all dependencies with yumdownloader, even if already installed?

You can use repotrack instead like this:

repotrack -a x86_64 -p /repos/Packages [packages]

Unfortunately there is a bug with the -a flag (arch). It will download i686 and x86_64.

Here's how to fix it:

if opts.arch:
    #archlist = []
    #archlist.extend(rpmUtils.arch.getArchList(opts.arch))
    archlist = opts.arch.split(',') # Change to this
else:
    archlist = rpmUtils.arch.getArchList()

You can use repoquery to get a list of group packages:

repoquery --qf=%{name} -g --list --grouppkgs=all [groups]

Which you can feed into repotrack:

repoquery --qf=%{name} -g --list --grouppkgs=all [groups] | xargs repotrack -a x86_64 -p /repos/Packages

For everyone's information, yumdownloader does not do the job. For anyone with some experience in package management with `yum, it is natural to expect that the following command-line would recursively download a package RPM and all its dependencies:

yumdownloader --resolve <package>

But it does not. May be it prints first-level dependencies or those that are not already installed. I am not sure.

Here is one method that works on CentOS 6.5. Follow the steps to install the downloadonly plugin for yum as given by Red Hat. Basically, on CentOS 6.x, do:

$ sudo yum install yum-plugin-downloadonly.noarch

Then make use of the plugin in combination with the --installroot switch of yum. This prevents yum from resolving and then skipping dependencies that are already installed on the system.

sudo yum install \
  --installroot=</path/to/tmp_dir> \
  --downloadonly --downloaddir <rpm_dir> <package>

You would downloaded RPMs of the package, <package> and all its dependencies in the directory, <rpm_dir>. Example, with Git:

$ mkdir root rpms
$ sudo yum install --installroot=/home/roy/root \
  --downloadonly --downloaddir rpms/ git

Also try

repoquery -R --resolve --recursive <name> | xargs -r yumdownloader

e.g.:

repoquery -R --resolve --recursive firefox | xargs -r yumdownloader

Source: https://www.thegeekdiary.com/downloading-rpm-packages-with-dependencies-yumdownloader-vs-yum-downloadonly-vs-repoquery/