Rez

This release adds a new tool, rez-cp, for copying packages/variants from one package repository to
another, with optional renaming/reversioning. The associated API can be found in src/package_copy.py.

Addressed Issues

* 541
* 510
* 477

Notes

* Package definition file writes are now atomic;
* private_build_requires is kept in installed/released packages;
* Fixes include modules not being copied into released packages;
* File lock is no longer created when variant installation happens in dry mode.

Package Usage Tracking, Better Config Overrides

Addressed Issues

* 528

Notes

Two new features are added in this release:

Override any config setting with an env-var. For any setting "foo", you can now set the env-var
REZ_FOO_JSON to a JSON-encoded string. This works for any config setting. Note that the existing
REZ_FOO env-var overrides are still in place also; if both are defined, REZ_FOO takes precedence.
This feature means you can now override some of the more complicated settings with env-vars, such as
package_filter.

Track context creation and sourcing via AMQP. Messages are published (on a separate thread) to the
nominated broker/exchange/routing_key. You have control over what parts of the context are published.
For more details: https://github.com/AcademySoftwareFoundation/rez/blob/master/src/rez/rezconfig.py#L414

The embedded simplejson lib was removed. The native json lib is used instead, and for cases where loads-without-unicoding-everything is needed, utils/json.py now addresses that instead.

Stdin-related fixes

Addressed Issues

* 512
* 526

Search API

PR: 213

Notes

Package/variant/family search API is now available in package_search.py. This gives the same
functionality as provided by the rez-search CLI tool.

Added mingw as a rez build_system for cmake

PR: 501