BETSEE 0.9.1.0 (Luckier Levin) released. Significant changes include: * The "--cache-policy" command-line option, allowing developers, end users, and automated tests to enable alternative XML->Python caching strategies. Internally, BETSEE converts XML-formatted Qt (Creater|Designer) user interface (UI) files residing under the "betsee.data" subpackage into PySide2-based Python submodules residing under one of two subpackages: * "betsee.data.py", the application-wide cache containing the official versions of these submodules bundled with BETSEE itself. * "~/.betsee/py", the user-specific cache containing strictly unofficial versions of these submodules *NOT* bundled with BETSEE itself. In both cases, BETSEE itself dynamically regenerates these submodules at runtime as needed. The mandatory argument passed to this optional option dictates which of these submodules if any are actually regenerated: * "--cache-policy=dev", the developer-specific caching policy. Under this strategy, both the application-wide *AND* user-specific caches are regenerated as needed. Raised exceptions are treated as fatal errors. * "--cache-policy=dev", the end user-specific caching policy. Under this strategy, *ONLY* the user-specific cache is regenerated. If any exception is raised while doing so, that exception is logged as a non-fatal warning and the corresponding submodule from the application-wide cache is copied into the user-specific cache -- ensuring that the latter always exists. * "--cache-policy=auto", the default caching policy. This strategy detects whether or not BETSEE is currently installed in development mode (i.e., tracked by a Git working tree), in which case the developer-specific caching policy is deferred to; else, the end user-specific caching policy is deferred to. * Issue #1 (i.e., "Startup Error") resolved. For both portability and efficiency reasons, BETSEE only officially supports the (Ana|Mini)conda Python distribution. This support is provided by the conda-forge "betsee-feedstock," which necessarily depends on the conda-forge "pyside2-feedstock," whose most recent release installs only the Qt 5.6.0 pre-pre-release version of PySide2, which predates the official Qt 5.11.2 "technical preview" pre-release version of PySide2 produced in late Septemeber of this year by the Qt Company. Unsurprisingly, the pre-pre-release version of PySide2 distributed by (Ana|Mini)conda suffers various game-breaking deficiencies, including the failure of the "pyside2uic" package to convert Qt (Creater|Designer) user interface (UI) XML files into working PySide2-based Python logic. This core defect is circumvented by the new by the new "--cache-policy" option, which contextually ignores failures during cache regeneration when run as an end user. * Issue #2 (i.e., "New Simulation Error") resolved. This release circumvents a trivial backward incompatibility with the Qt 5.6 API: notably, the failure of Qt < 5.7.0 to pass the "checked" boolean to slots connected to the prevalent "QAction.triggered" signal. * Caching API centralized. Caching-specific logic previously distributed throughout the codebase (e.g., the "betsee.gui.guicache" submodule, the "betsee.util.io.xml" subpackage) has now been centralized into the new "betse.lib.pyside2.cache" subpackage for maintainability. * Pathtree -> MetaAppABC API. The prior procedural-based "betsee.guipathtree" submodule has been refactored into the object-oriented "betsee.guimetaapp" submodule leveraging the newly minted "betse.util.meta.metaappabc" API, reducing DRY (i.e., "Don't Repeat Yourself") violations across both codebases. * Test suite planning. This release also adds the rudimentary outline for what will subsequently be developed into a full-blown continuous integration (CI) test suite. While currently non-working, something >>>>>>>> nothing. Thanks to Eric Sinton (@esinton) for voluminously documenting both issues and supplying an ad-hoc solution for the first issue. Our userbase rocks!