Show README.md as part of a project summary in Gitweb

gitweb_show_readme_markdown.pl

# Convert README.md (Markdown file) to HTML and include in output #using external Markdown                                                                                                                                                                                                                                                                           
if (!$prevent_xss) {
    $file_name = "README.md";
    my $proj_head_hash = git_get_head_hash($project);
    my $readme_blob_hash = git_get_hash_by_path($proj_head_hash, "README.md", "blob");

    if ($readme_blob_hash) { # if README.md exists                                                                                                                                                      
        print "<div class=\"header\">readme</div>\n";
        print "<div class=\"readme page_body\">"; # TODO find/create a better CSS class than page_body                                                                                                  

        my $cmd_markdownify = $GIT . " " . git_cmd() . " cat-file blob " . $readme_blob_hash . " | markdown |";
        open FOO, $cmd_markdownify or die_error(500, "Open git-cat-file blob '$hash' failed");
        while (<FOO>) {
            print $_;
        }
        close(FOO);

        print "</div>";
    }
}