engine: prevent a function call for each store file Python function calls are not cheap. Instead of calling the function once for each file in store, we use a dedicated function which filters and yields the required files. Differential Revision: https://phab.mercurial-scm.org/D9673

rhg: use a release-mode executable in tests This allows the rhg build for test-rhg.t to share compiled dependencies such as hg-core with the hg-cpython build for other tests. For context, my wrapper script for the typical edit-compile-test cycle now looks like this: (cd rust && cargo +nightly-2020-10-04 fmt) (cd rust && cargo build --release -p rhg) make --silent local PURE=--rust python test/run-tests.py --local "$@" Differential Revision: https://phab.mercurial-scm.org/D9728

rust: fix file folding map The file folding map, frequently used on macOS, had two issues: * the means for converting it to Python didn't work * a minor typo when copying the python code, where `!=` became `==` With this, the rust code passes all tests on macOS. Test Plan: I'm currently doing a full test run on a case-insensitive file system. If it passes, perhaps we can change the platform check from an error to a warning? Differential Revision: https://phab.mercurial-scm.org/D9671