Prepend/AppendUnique/PrependUnique write the same captured keys and now
alias Append instead of no-op'ing away a link directory. env.get on an
unmodelled var warns once so a script taking the default branch is
diagnosable. LIBS/LINKFLAGS/CPPFLAGS entries are shlex-quoted like the
path buckets, since each is one argv token in SCons and re-lexing must
not split a spaced value. The HEAD probes follow the happy-eyeballs
convention, and the tool-prefetch backstop keeps its traceback at debug.
shlex.quote wraps backslash paths on Windows, so the raw emitted strings
are platform-varying; lexing like the consumer does pins the behavior
that matters and passes on both separators.
lex_build_flags shlex-splits build.flags, so an unquoted spaced path
became two garbage tokens; shlex.quote at the emit site round-trips it
back to one.
A non-string extraScript now fails naming the library instead of an opaque
TypeError, matching the hardening on every other manifest field. CPPPATH
joins the captured keys and translates to -I flags anchored like LIBPATH,
since the pipeline already routes -I to include dirs. Version-less
dependency drops log at INFO until the arduino-backend reconciliation
lands, and the wave-deferral comment now claims only what the guard
actually saves.
J. Nick Koston