CPPDEFINES joins the quoted buckets (a spaced define no longer splits
across tokens) and its tuple branch validates the pair elements. The
fake env warns on attribute access rather than call, so hasattr/
truthiness branches are diagnosable, with dunder probes excluded; an
unmodelled subscript warns and returns '' instead of a KeyError
discarding the whole capture. Malformed platforms/frameworks values
raise plain InvalidLibrary, giving the non-platform warning branches a
real producer, and their tests use real manifests instead of
monkeypatched raisers. The version-less dependency drop moves to debug:
bundled names (Wire, SPI) made it per-build noise nobody can act on.
Split out of #18662: the converter/manifest hardening without the
download parallelization, which stays there.
The PIO extra-script shim moves from espidf/ to platformio/ and gains
type checks for every manifest field, capture of the Append variants and
CPPPATH, warn-once diagnostics for unmodelled env reads, and uniform
shlex quoting so captured values survive the lex_build_flags round-trip.
The dependency walk normalizes every spelling PIO accepts, splits the
routine cross-platform skip (IncompatiblePlatform) from real manifest
problems, validates manifest shape once, and the shared flag lexer
warns and drops trailing or empty glued arguments.
J. Nick Koston