Whitespace.
Add true value.
Check results of command execution.
Check results of command execution.
Check results of command execution.
Check results of command execution.
Whitespace.
Check results of command execution.
Check results of command execution when checking command existence.
Whitespace.
Check results of command execution.
Check results of command execution.
Remove useless print.
Remove unused variable.
Remove unused variable.
Allow for builds without disk_allocations

This will let the command not fail on builds who do not have a
disk_allocation.  One common reason for this is that the build was
unstartable, but other causes may exist.
Whitespace.
Check results of command execution.
Whitespace.
Whitespace.