Avoid invocation of cvmfsexec distros building if not necessary #309
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As identified in #308, this PR brings in a change to the existing use of
subprocess
module (via the GWMSsubprocessSupport
module) for efficiency purposes.Currently, the
subprocessSupport
module is used to execute/usr/bin/create_cvmfsexec_distros.sh
always, regardless of whether cvmfsexec distributions are required to be built or rebuilt. If CVMFS is not needed and thecvmfsexec_distro
tag is not defined in the factory configuration (disabled mode), then callingsubprocessSupport
to execute the script is basically unnecessary. Additionally, sincesubprocess
spawns a new process to execute the script, this might result in a memory-intensive operation in a production setting.