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3.5.2. Registering and Deregistering Software Collections

In case a Software Collection is shared over NFS but not locally installed on your system, you need to make the scl tool aware of it by registering that Software Collection.
Registering a Software Collection is done by running the scl register command: 
$ scl register /opt/provider/software_collection
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where /opt/provider/software_collection is the absolute path to the file system hierarchy of the Software Collection you want to register. The path's directory must contain the enable scriptlet and the root/ directory to be considered a valid Software Collection file system hierarchy.
Deregistering a Software Collection is a reverse operation that you perform when you no longer want the scl tool to be aware of a registered Software Collection.
Deregistering a Software Collection is done by calling a deregister scriptet when running the scl command: 
$ scl deregister software_collection
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where software_collection is the name of the Software Collection you want to deregister.
You can specify (de)register scriptlets in a Software Collection metapackage similarly to how enable scriptlets are specified. When specifying the scriptets, remember to explicitly include them in the %file section of the metapackage spec file.
See the following sample code for an example of specifying (de)register scriptets: 
%install
%scl_install

cat >> %{buildroot}%{_scl_scripts}/enable << EOF
# Contents of the enable scriptlet goes here
...
EOF

cat >> %{buildroot}%{_scl_scripts}/register << EOF
# Contents of the register scriptlet goes here
...
EOF

cat >> %{buildroot}%{_scl_scripts}/deregister << EOF
# Contents of the deregister scriptlet goes here
...
EOF
...
%files runtime
%scl_files
%{_scl_scripts}/register
%{_scl_scripts}/deregister
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In the register scriptlet, you can optionally specify the commands you want to run when registering the Software Collection, for example, commands to create files in /etc/opt/ or /var/opt/.
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