[rb-general] Clarification on BUILD_PATH_PREFIX_MAP and drive letters

[Dan Kegel]

On Fri, Jun 23, 2017 at 6:53 PM, Dan Kegel <dank at kegel.com> wrote:
> https://reproducible-builds.org/specs/build-path-prefix-map/ says
>   "The : character separates encoded list items from each other."
> This seems to have forgotten about Windows, which uses : for drive
> letters, and typically uses ; for such separators.
> Presumably on Windows, a Ruby implementation would use
> File::PATH_SEPARATOR for this character, and the spec needs a tweak.

I should have written "would be sorely tempted to use File::PATH_SEPARATOR".
The spec is clear that colons get encoded, but it could still use a
clarification
for the slow reader showing how Windows paths are mapped.

Related question: the spec is silent about case insensitive filesystems.
How are they to be handled?  Worth mentioning in the spec even
if all you say is "undefined" for now...?