-=head1 NAME
-
-public-inbox-gcf2 - internal libgit2-based blob retriever
-
-=head1 SYNOPSIS
-
- This is an internal command used by public-inbox.
- It may change unrecognizably or cease to exist at some point
-
-=head1 DESCRIPTION
-
-public-inbox-gcf2 is an optional internal process used by
-public-inbox daemons for read-only access to underlying git
-repositories.
-
-Users are NOT expected to run public-inbox-gcf2 on their own.
-It replaces multiple C<git cat-file --batch> processes by treating
-any git repos it knows about as alternates.
-
-None of its behaviors are stable and it is ALL subject to change
-at any time.
-
-Any lines written to its standard input prefixed with a C</>
-are interpreted as a git directory. That git directory
-will be suffixed with "/objects" and treated as an alternate.
-It writes nothing to stdout in this case.
-
-Otherwise it behaves like C<git cat-file --batch>, but only accepts
-unabbreviated hexadecimal object IDs in its standard input.
-Its output format is identical to C<git cat-file --batch>. It
-only works for L<public-inbox-v2-format(5)> inboxes and v1
-inboxes indexed by L<public-inbox-index(1)>.
-
-=head1 OPTIONS
-
-=head1 ENVIRONMENT
-
-=over 8
-
-=item PERL_INLINE_DIRECTORY
-
-This must be set unless C<~/.cache/public-inbox/inline-c>
-exists. C<public-inbox-gcf2> uses L<Inline::C> and libgit2
-and compiles a small shim on its first run.
-
-=back
-
-=head1 CONTACT
-
-Feedback welcome via plain-text mail to L<mailto:meta@public-inbox.org>
-
-The mail archives are hosted at L<https://public-inbox.org/meta/>
-and L<http://hjrcffqmbrq6wope.onion/meta/>
-
-=head1 COPYRIGHT
-
-Copyright 2020 all contributors L<mailto:meta@public-inbox.org>
-
-License: AGPL-3.0+ L<https://www.gnu.org/licenses/agpl-3.0.txt>
-
-=head1 SEE ALSO
-
-L<git-cat-file(1)>