Installing private GIT and CGIT (git web frontend) on Centos 7.x / 6.x

 TLDR;

Install Prerequisite packages first:
yum install fcgi-devel highlight -y

Install fcgiwrap

cd /usr/src/
git clone git://github.com/gnosek/fcgiwrap.git
cd fcgiwrap
autoreconf -i
./configure --prefix=/usr
make
make install

Add cgitwrap and fcgiwrap scripts: /etc/init.d/fcgiwrap

#!/usr/bin/perl

use strict;
use warnings FATAL => qw( all );

use IO::Socket::UNIX;

my $bin_path = '/usr/sbin/fcgiwrap -p /usr/libexec/git-core/git-http-backend';
my $socket_path = $ARGV[0] || '/var/run/cgit-fastcgi/git-fastcgi.socket';
my $num_children = $ARGV[1] || 1;

close STDIN;

unlink $socket_path;
my $socket = IO::Socket::UNIX->new(
    Local => $socket_path,
    Listen => 100,
);

die "Cannot create socket at $socket_path: $!\n" unless $socket;

for (1 .. $num_children) {
    my $pid = fork;
    die "Cannot fork: $!" unless defined $pid;
    next if $pid;

    exec $bin_path;
    die "Failed to exec $bin_path: $!\n";
}

And /etc/init.d/cgitwrap

#!/usr/bin/perl

use strict;
use warnings FATAL => qw( all );

use IO::Socket::UNIX;

my $bin_path = '/usr/sbin/fcgiwrap -p /var/www/htdocs/cgit/cgit.cgi';
my $socket_path = $ARGV[0] || '/var/run/cgit-fastcgi/cgit-fastcgi.socket';
my $num_children = $ARGV[1] || 1;

close STDIN;

unlink $socket_path;
my $socket = IO::Socket::UNIX->new(
    Local => $socket_path,
    Listen => 100,
);

die "Cannot create socket at $socket_path: $!\n" unless $socket;

for (1 .. $num_children) {
    my $pid = fork;
    die "Cannot fork: $!" unless defined $pid;
    next if $pid;

    exec $bin_path;
    die "Failed to exec $bin_path: $!\n";
}


Install cgit

cd /usr/src
git clone https://git.zx2c4.com/cgit
cd cgit
git submodule init
git submodule update
make
make install

Configure cgit

mkdir /var/www/htdocs/cgit-css
cp /var/www/htdocs/cgit/cgit.css /var/www/htdocs/cgit-css
cp /var/www/htdocs/cgit/cgit.png /var/www/htdocs/cgit-css
Edit /usr/local/lib/cgit/filters/syntax-highlighting.sh and enable version 3 at the end of the file and save it as syntax-highlighting-edited.sh


Add /etc/cgitrc

source-filter=/usr/local/lib/cgit/filters/syntax-highlighting.sh
about-filter=/usr/local/lib/cgit/filters/about-formatting.sh
css=/cgit-css/cgit.css
logo=/cgit-css/cgit.png
robots=noindex, nofollow
virtual-root=/cgit
scan-path=/opt/projects/git

Correct permissions

chown -R nginx:nginx /opt/projects/git
mkdir /var/run/cgit-fastcgi/
chown nginx:nginx /var/run/cgit-fastcgi/
chmod +x /etc/init.d/cgitwrap
chmod +x /etc/init.d/fcgiwrap
sudo -u nginx /etc/init.d/cgitwrap
sudo -u nginx /etc/init.d/fcgiwrap
echo "mkdir -p /var/run/cgit-fastcgi/" >> /etc/rc.local
echo "chown nginx:nginx /var/run/cgit-fastcgi/" >> /etc/rc.local
echo "sudo -u nginx /etc/init.d/cgitwrap" >> /etc/rc.local
echo "sudo -u nginx /etc/init.d/fcgiwrap" >> /etc/rc.local
chmod +x /etc/rc.local

Check if they're running properly

ls -l /var/run/cgit-fastcgi/

Configure nginx

location ~ /git(/.*) {
        include /etc/nginx/fastcgi_params;
        client_max_body_size 0;
        fastcgi_param SCRIPT_FILENAME /usr/libexec/git-core/git-http-backend;
        include fastcgi_params;
        fastcgi_param GIT_HTTP_EXPORT_ALL "";
        fastcgi_param GIT_PROJECT_ROOT /opt/projects/git;
        fastcgi_param PATH_INFO $1;
        fastcgi_pass      unix:/var/run/cgit-fastcgi/git-fastcgi.socket;
        auth_basic "Restricted";
        auth_basic_user_file conf.d/.htpasswd.mghadam;

}

location ~ /cgit(/.*) {
        include fastcgi_params;
        fastcgi_param       SCRIPT_FILENAME /var/www/htdocs/cgit/cgit.cgi;
        fastcgi_pass        unix:/var/run/cgit-fastcgi/cgit-fastcgi.socket;
        fastcgi_param HTTP_HOST $server_name;
        fastcgi_param PATH_INFO $1;
        fastcgi_param QUERY_INFO $1;
        auth_basic "Restricted";
        auth_basic_user_file conf.d/.htpasswd.mghadam;
}

location ~ /cgit-css(/.*) {
        root /var/www/htdocs;
        if ($request_uri ~* \.(js|css|png|jpg|jpeg|gif|ico|swf|xml|txt)$) {
                expires 15d;
                break;
        }
}