cryptography ships no win_arm64 wheel, so every Windows ARM64 venv sync
compiles it from the sdist and needs MSVC, Clang, Rust and static OpenSSL.
Only setup-hermes.ps1 (and so activate.ps1) prepared that environment,
between a `pm install --tools-only` and the real sync. install.ps1,
`hermes update` and repair ran the same sync without it and failed in
openssl-sys.
PM owns the sync, so PM prepares it. pm/native_build.py holds the adapter
(moved from scripts/build/windows_deps.py) plus source_build_environment(),
which prepares only on win32-arm64 when the synced project carries the
provider script. A payload has prebuilt dependencies and needs no compiler.
VenvPackage.apply and build_environment pass the result to uv children
only. It carries the bridged pip index settings, which managed_environment
applies only to the ambient environment. The state root stays the store
parent, so existing vcpkg/OpenSSL builds are reused.
setup-hermes.ps1 collapses to one `pm install`: the tools-only split existed
only for this preparation, and pm install already puts its tools on PATH
before the venv sync (pm/cli.py activate check).
Not yet verified live on Windows ARM64.
hermes_cli.runtime_paths (venv generations, selection, activation) moves to
pm.environments, and gains venv_bin_dir / venv_python / project_python. Every
in-tree caller asks pm for an interpreter now; pm no longer reaches back into
hermes_cli for its own environment layout (pm.packages, pm.extras, pm.ensure,
pm.paths imported hermes_cli.runtime_paths). The three open-coded
"Scripts/python.exe or bin/python" ladders in pm collapse onto venv_python.
hermes_constants.venv_python_path / venv_bin_dir and hermes_cli.runtime_paths
stay as frozen-updater-surface shims only (tests/compat/old_updater_surface.json).
To keep the boot path light, pm/__init__ resolves its facade lazily (PEP 562)
and pm.registry loads the built-in package definitions on first read instead of
at import: `import hermes_bootstrap` now loads pm + pm.environments only (25ms,
was 37ms with the eager facade dragging in the downloader). The stripped-payload
fixtures that ship only pre-import files keep working for the same reason.
Also restores two frozen-surface re-exports the F401 sweep dropped
(banner._github_compare_behind, cua_backend.resolve_cua_driver_cmd).
Dependency acquisition during packaging left native wheels and packager
inputs outside the pre-build cache save. Compose PM and existing providers
into a preparation phase, then require builds to consume admitted inputs.
Share native preparation with PM Bundle. Keep path-bound environments and
signing outputs separate from reusable caches. Use read-only cache tokens
for commit builds and preserve the one-command local build path.
Verify pinned tools through PM, probe PTYs under the prepared Electron,
and supply dmgbuild through a build-only PM package. Resolve bundled tool
stores from their payload manifest so relocation preserves discovery.
Validation: focused Python and JS tests, checkJs, Ruff, Windows checks,
anti-slop, cache relocation, and network-denied Linux AppImage builds.
Relocated runtime smoke passed with NixOS host libraries supplied.
Native Windows/macOS signing and live GitHub cache behavior remain untested.
