As per PEP 0479 (https://www.python.org/dev/peps/pep-0479/),
StopIteration thrown in context managers are not valid starting from
Python 3.7.

source.py: don't let StopIteration propagate to silence() contextmanager

See merge request !945

Phillip Smyth authored Nov 07, 2018 and Jürg Billeter committed Nov 12, 2018

_project.py: Added validate_nodes() helper function to prevent duplicate lists

element-path was being used before node validation resulting in uncaught errors

Element path not validated before use

See merge request !937

Valentin David authored Nov 12, 2018 and Valentin David committed Nov 14, 2018

Fixes #755

Run tests on aarch64

Closes #369 and #755

See merge request !948

It's inconvenient to have to create a Linux platform to parse the bwrap version
and we want to get the version in a consistent manner.

If `bwrap` fails to set up the sandbox and start the payload command
it won't write an exit-code in --json-status-fd,
so we can report if it was a sandboxing failure if we don't get exit-code status
and a payload command failure if we do and it's non-zero.

Closes #286

Distinguish between bubblewrap sandboxing failure and command failure

Closes #286

See merge request !868

Added --world flag to def build()
Added helper function for walking through dirs to return files

Added --world flag to list of expected flags

Added test files to be built using build --world