Git/gitosis: How to check validity of user name and email?

Question

I have installed git and gitosis and I need to add a check that the user name is valid when something is pushed into the repository.

I reckon the pre-receive hook i

Answer 1

OK, we managed to get the job done, Bombe's reply above helped a lot. This is how it was done:

• I added os.environ['GITOSIS_USER'] = user to Gitosis/Serve.py, function Main() and reinstalled it.
• I then created the following pre-receive script:

hooks/pre-receive

#!/usr/bin/perl

my $user = $ENV{'GITOSIS_USER'};

if ($user !~ m/^[^@]+@[^@]+$/ ) {
  print STDERR "Unknown user. Not running under Gitosis?\n";
  exit 1;
}

my $fail = 0;

while() {
  if (m/^([0-9a-f]+)\s+([0-9a-f]+)\s+(\S+)$/) {

    my $oldver = $1;
    my $curver = $2;
    my $ref = $3;

    my $ret = open (FH, "-|", "git", "rev-list", '--pretty=format:%H:%ae:%ce',$

    if ($ret) {
      # great and less brakets hidden in HTML: >FH<
      while () {
        chomp;
        my $line = $_;
         if ($_ !~ m/commit /) {
          my ($rev, $author, $committer) = split(":", $line);
          if ( $author ne $user && $committer ne $user ) {
            print STDERR "Unauthorized commit: $rev\n";
            $fail++;
          }
        }
      }
    }
  }
}

if ($fail) {
  exit 1;
}

 exit 0;

This means the user name has to be the same as the one used to create the ssh key for gitosis key ring.