#!/usr/bin/perl

use strict;
use warnings;

our ($REPO_BASE, $GL_ADMINDIR, $GL_CONF, $GIT_PATH, $GL_PACKAGE_CONF, $GL_PACKAGE_HOOKS);

# setup quiet mode if asked; please do not use this when running manually
open STDOUT, ">", "/dev/null" if (@ARGV and shift eq '-q');

# wrapper around mkdir; it's not an error if the directory exists, but it is
# an error if it doesn't exist and we can't create it
sub wrap_mkdir
{
    my $dir = shift;
    if ( -d $dir ) {
        print "$dir already exists\n";
        return;
    }
    mkdir($dir) or die "mkdir $dir failed: $!\n";
    print "created $dir\n";
}

# the common setup module is in the same directory as this running program is
my $bindir = $0;
$bindir =~ s/\/[^\/]+$//;
require "$bindir/gitolite.pm";

# ask where the rc file is, get it, and "do" it
&where_is_rc();
unless ($ENV{GL_RC}) {
    # doesn't exist.  Copy it across, tell user to edit it and come back
    my $glrc = $ENV{HOME} . "/.gitolite.rc";
    if ($GL_PACKAGE_CONF) {
        system("cp $GL_PACKAGE_CONF/example.gitolite.rc $glrc");
    } else {
        system("cp $bindir/../conf/example.gitolite.rc $glrc");
    }
    print "created $glrc\n";
    print "please edit it, change the paths if you wish to, and RERUN THIS SCRIPT\n";
    exit;
}

# ok now the rc file exists; read it to get the other paths
die "parse $ENV{GL_RC} failed: " . ($! or $@) unless do $ENV{GL_RC};

# add a custom path for git binaries, if specified
$ENV{PATH} .= ":$GIT_PATH" if $GIT_PATH;

# mkdir $REPO_BASE, $GL_ADMINDIR if they don't already exist
my $repo_base_abs = ( $REPO_BASE =~ m(^/) ? $REPO_BASE : "$ENV{HOME}/$REPO_BASE" );
wrap_mkdir($repo_base_abs);
wrap_mkdir($GL_ADMINDIR);
# mkdir $GL_ADMINDIR's subdirs
for my $dir qw(conf doc keydir logs src hooks hooks/common hooks/gitolite-admin) {
    # some of them will stay empty; too lazy to fix right now ;-)
    wrap_mkdir("$GL_ADMINDIR/$dir");
}

# "src" and "doc" will be overwritten on each install, but not conf
if ($GL_PACKAGE_HOOKS) {
    system("cp -R $GL_PACKAGE_HOOKS $GL_ADMINDIR");
} else {
    system("cp -R $bindir/../src $bindir/../doc $bindir/../hooks $GL_ADMINDIR");
    system("cp    $bindir/../conf/VERSION                        $GL_ADMINDIR/conf");
}

unless (-f $GL_CONF or $GL_PACKAGE_CONF) {
    print <<EOF;
    please do the following:
    1.  create and edit $GL_CONF to contain something like this:
            repo gitolite-admin
                RW+     =   yourname
    2.  copy "yourname.pub" to $GL_ADMINDIR/keydir
    3.  run this command
            $GL_ADMINDIR/src/gl-compile-conf
EOF
}

# finally, hooks must be propagated to all the repos in case they changed
chdir("$repo_base_abs") or die "chdir $repo_base_abs failed: $!\n";
for my $repo (`find . -type d -name "*.git"`) {
    chomp ($repo);
    # propagate our own, plus any local admin-defined, hooks
    ln_sf("$GL_ADMINDIR/hooks/common", "*", "$repo/hooks");
    # in case of package install, GL_ADMINDIR is no longer the top cop;
    # override with the package hooks
    ln_sf("$GL_PACKAGE_HOOKS/common", "*", "$repo/hooks") if $GL_PACKAGE_HOOKS;
    chmod 0755, "$repo/hooks/update";
}

# oh and one of those repos is a bit more special and has an extra hook :)
if ( -d "gitolite-admin.git/hooks" ) {
    print "copying post-update hook to gitolite-admin repo...\n";
    unlink "gitolite-admin.git/hooks/post-update";
    symlink "$GL_ADMINDIR/hooks/gitolite-admin/post-update", "gitolite-admin.git/hooks/post-update"
        or die "could not symlink post-update hook\n";
    # ditto... (see previous block)
    ln_sf("$GL_PACKAGE_HOOKS/gitolite-admin", "post-update", "gitolite-admin.git/hooks") if $GL_PACKAGE_HOOKS;
    chmod 0755, "gitolite-admin.git/hooks/post-update";
}

# fixup program renames
for my $oldname qw(pta-hook.sh conf-convert.pl 00-easy-install.sh 99-emergency-addkey.sh install.pl update-hook.pl hooks/update ga-post-update-hook VERSION) {
    unlink "$GL_ADMINDIR/src/$oldname";
    unlink "$ENV{HOME}/gitolite-install/src/$oldname";
}