Where to find the source code of grep::metacpan ?

grep::metacpan is an open source experimental project developped by the Perl Community.

The source code is divided into three git repositories:

•  metacpan-grep-front-end, the Front End website which is this website...
•  metacpan-grep-builder experiment on building a git grep service of current CPAN.
•  metacpan-cpan-extracted extracted CPAN, all latest files extracted in one single *big* repository. Thanks GitHub !

The concept is very basic: extract all CPAN distribution (performed by  metacpan-grep-builder) in one single git directory (which lives in  metacpan-cpan-extracted).

Then from there, cross fingers and use a pure 'git grep' implementation with a frontend on top of it:  metacpan-grep-front-end.

The git grep is divided in two stages: 'git grep -l' to get the list of files matching the pattern (this is cached for future queries), then use the list of files to perform the actual 'git grep'.