Merge branch 'master' into rorcz

[girocco.git] / Girocco / Config.pm

package Girocco::Config;

use strict;
use warnings;


## Basic settings

# Name of the service
our $name = "repo.or.cz";

# Nickname of the service (undef for initial part of $name upto first '.')
our $nickname = "rorcz";

# Title of the service (as shown in gitweb)
our $title = "Public Git Hosting";

# Path to the Git binary to use (you MUST set this, even if to /usr/bin/git!)
our $git_bin = '/home/repo/bin/git';

# Path to the git-daemon binary to use (undef to use default)
# If $gitpullurl is undef this will never be used (assuming no git inetd
# service has been set up in that case).
# The default if this is undef is `$git_bin --exec-path`/git-daemon
# Setting this explicitly is slightly more efficient as it avoids calling --exec-path
our $git_daemon_bin = '/home/repo/libexec/git-core/git-daemon';

# Path to the git-http-backend binary to use (undef to use default)
# If both $httppullurl and $httpspushurl are undef this will never be used
# The default if this is undef is `$git_bin --exec-path`/git-http-backend
# Setting this explicitly is slightly more efficient as it avoids calling --exec-path
our $git_http_backend_bin = '/home/repo/libexec/git-core/git-http-backend';

# Name (if in $PATH) or full path to netcat executable that accepts a -U option
# to connect to a unix socket.  This may simply be 'nc' on many systems.
our $nc_openbsd_bin = 'nc.openbsd';

# Path to the sendmail instance to use.  It should understand the -f <from>, -i and -t
# options as well as accepting a list of recipient addresses in order to be used here.
# You MUST set this, even if to '/usr/sbin/sendmail'!
# Setting this to 'sendmail.pl' is special and will automatically be expanded to
# a full path to the ../bin/sendmail.pl executable in this Girocco installation.
# sendmail.pl is a sendmail-compatible script that delivers the message directly
# using SMTP to a mail relay host.  This is the recommended configuration as it
# minimizes the information exposed to recipients (no sender account names or uids),
# can talk to an SMTP server on another host (eliminating the need for a working
# sendmail and/or SMTP server on this host) and avoids any unwanted address rewriting.
# By default it expects the mail relay to be listening on localhost port 25.
# See the sendmail.pl section below for more information on configuring sendmail.pl.
our $sendmail_bin = 'sendmail.pl';

# E-mail of the site admin
our $admin = 'admin@repo.or.cz';

# Sender of emails
# This is the SMTP 'MAIL FROM:' value
# It will be passed to $sendmail_bin with the -f option
# Some sites may not allow non-privileged users to pass the -f option to
# $sendmail_bin.  In that case set this to undef and no -f option will be
# passed which means the 'MAIL FROM:' value will be the user the mail is
# sent as (either $cgi_user or $mirror_user depending on the activity).
# To avoid having bounce emails go to $admin, this may be set to something
# else such as 'admin-noreply@example.org' and then the 'admin-noreply' address
# may be redirected to /dev/null.  Setting this to '' or '<>' is not
# recommended because that will likely cause the emails to be marked as SPAM
# by the receiver's SPAM filter.  If $sendmail_bin is set to 'sendmail.pl' this
# value must be acceptable to the receiving SMTP server as a 'MAIL FROM:' value.
# If this is set to undef and 'sendmail.pl' is used, the 'MAIL FROM:' value will
# be the user the mail is sent as (either $cgi_user or $mirror_user).
our $sender = 'admin-noreply@repo.or.cz';

# Copy $admin on failure/recovery messages?
our $admincc = 0;

# Girocco branch to use for html.cgi view source links (undef for HEAD)
our $giroccobranch = 'rorcz';


## Git user agent strings

# Git clients (i.e. fetch/clone) always send a user agent string when fetching
# over HTTP.  Since version 1.7.12.1 an 'agent=' capability string is included
# as well which affects git:, smart HTTP and ssh: protocols.

# These settings allow the default user agent string to be changed independently
# for fetch/clone operations (only matters if $mirror is true) and server
# operations (some other Git client fetching from us).  Note that it is not
# possible to suppress the capability entirely although it can be set to an
# empty string.  If these values are not set, the default user agent string
# will be used.  Typically (unless Git was built with non-standard options) the
# default is "git/" plus the version.  So for example "git/1.8.5.6" or
# "git/2.1.4" might be seen.

# One might want to change the default user agent strings in order to prevent
# an attacker from learning the exact Git version being used to avoid being
# able to quickly target any version-specific vulnerabilities.  Note that
# no matter what's set here, an attacker can easily determine whether a server
# is running JGit, libgit2 or Git and for Git whether it's version 1.7.12.1 or
# later.  A reasonable value to hide the exact Git version number while
# remaining compatible with servers that require a "Git/" user agent string
# would be something like "git/2" or even just "git/".

# The GIT_USER_AGENT value to use when acting as a client (i.e. clone/fetch)
# This value is only used if $mirror is true and at least one mirror is set up.
# Setting this to the empty string will suppress the HTTP User-Agent header,
# but will still include an "agent=" capability in the packet protocol.  The
# empty string is not recommended because some servers match on "git/".
# Leave undef to use the default Git user agent string
# IMPORTANT: some server sites will refuse to serve up Git repositories unless
# the client user agent string contains "Git/" (matched case insensitively)!
our $git_client_ua = undef;

# The GIT_USER_AGENT value to use when acting as a server (i.e. some Git client
# is fetching/cloning from us).
# Leave undef to use the default Git user agent string
our $git_server_ua = undef;


## Feature knobs

# Enable mirroring mode if true (see "Foreign VCS mirrors" section below) 
our $mirror = 1;

# Enable push mode if true
our $push = 1;

# If both $mirror and $push are enabled, setting this to 'mirror' pre-selects
# mirror mode on the initial regproj display, otherwise 'push' mode will be
# pre-selected.  When forking the initial mode will be 'push' if $push enabled.
our $initial_regproj_mode = 'mirror';

# Enable user management if true; this means the interface for registering
# user accounts and uploading SSH keys. This implies full chroot.
our $manage_users = 1;

# Minimum key length (in bits) for uploaded SSH RSA/DSA keys.
# If this is not set (i.e. undef) keys as small as 512 bits will be allowed.
# Nowadays keys less than 2048 bits in length should probably not be allowed.
# Note, however, that versions of OpenSSH starting with 4.3p1 will only generate
# DSA keys of exactly 1024 bits in length even though that length is no longer
# recommended.  (OpenSSL can be used to generate DSA keys with lengths > 1024.)
# OpenSSH does not have any problem generating RSA keys longer than 1024 bits.
# This setting is only checked when new keys are added so setting it/increasing it
# will not affect existing keys.  For maximum compatibility a value of 1024 may
# be used however 2048 is recommended.  Setting it to anything other than 1024,
# 2048 or 3072 may have the side effect of making it very difficult to generate
# DSA keys that satisfy the restriction (but RSA keys should not be a problem).
# Note that no matter what setting is specified here keys smaller than 512 bits
# will never be allowed via the reguser.cgi/edituser.cgi interface.
# RECOMMENDED VALUE: 2048 (ok) or 3072 (better)
our $min_key_length = 1024;

# Disable DSA public keys?
# If this is set to 1, adding DSA keys at reguser.cgi/edituser.cgi time will be
# prohibited.  If $pushurl is undef then this is implicitly set to 1 since DSA
# keys are not usable with https push.
# OpenSSH will only generate 1024 bit DSA keys starting with version 4.3p1.
# Even if OpenSSL is used to generate a longer DSA key (which can then be used
# with OpenSSH), the SSH protocol itself still forces use of SHA-1 in the DSA
# signature blob which tends to defeat the purpose of going to a longer key in
# the first place.  So it may be better from a security standpoint to simply
# disable DSA keys especially if $min_key_length and $rsakeylength have been set
# to something higher such as 3072 or 4096.  This setting is only checked when
# new keys are added so setting it/increasing it will not affect existing keys.
# There is no way to disable DSA keys in the OpenSSH server config file itself.
# If this is set to 1, no ssh_host_dsa_key will be generated or used with the
# sshd running in the jail (but if the sshd_config has already been generated
# in the jail, it must be removed and 'sudo make install' run again or otherwise
# the sshd_config needs to be edited by hand for the change to take effect).
# RECOMMENDED VALUE: 1
our $disable_dsa = 0;

# Enable the special 'mob' user if set to 'mob'
our $mob = "mob";

# Let users set admin passwords; if false, all password inputs are assumed empty.
# This will make new projects use empty passwords and all operations on them
# unrestricted, but you will be able to do no operations on previously created
# projects you have set a password on.
our $project_passwords = 1;

# How to determine project owner; 'email' adds a form item asking for their
# email contact, 'source' takes realname of owner of source repository if it
# is a local path (and empty string otherwise). 'source' is suitable in case
# the site operates only as mirror of purely local-filesystem repositories.
our $project_owners = 'email';

# Which project fields to make editable, out of 'shortdesc', 'homepage',
# 'README', 'notifymail', 'notifyjson', 'notifycia'. (This is currently
# soft restriction - form fields aren't used, but manually injected values
# *are* used. Submit a patch if that's an issue for you.)
our @project_fields = qw(homepage shortdesc README notifymail notifyjson notifycia);

# Minimal number of seconds to pass between two updates of a project.
our $min_mirror_interval = 3600; # 1 hour

# Minimal number of seconds to pass between two garbage collections of a project.
our $min_gc_interval = 604800; # 1 week

# Whether or not to run the ../bin/update-pwd-db script whenever the etc/passwd
# database is changed.  This is typically needed (i.e. set to a true value) for
# FreeBSD style systems when using an sshd chroot jail for push access.  So if
# $pushurl is undef or the system Girocco is running on is not like FreeBSD
# (e.g. a master.passwd file that must be transformed into pwd.db and spwd.db), then
# this setting should normally be left false (i.e. 0).  See comments in the
# provided ../bin/update-pwd-db script about when and how it's invoked.
our $update_pwd_db = 0;

# Port the sshd running in the jail should listen on
# Be sure to update $pushurl to match
# Not used if $pushurl is undef
our $sshd_jail_port = 22;

# If this is true then host names used in mirror source URLs will be checked
# and any that are not DNS names (i.e. IPv4 or IPv6) or match one of the DNS
# host names in any of the URL settings below will be rejected.
our $restrict_mirror_hosts = 1;

# If $restrict_mirror_hosts is enabled this is the minimum number of labels
# required in a valid dns name.  Normally 2 is the correct value, but if
# Girocco is being used internally where a common default or search domain
# is set for everyone then this should be changed to 1 to allow a dns name
# with a single label in it.  No matter what is set here at least 1 label
# is always required when $restrict_mirror_hosts is enabled.
our $min_dns_labels = 2;


## Foreign VCS mirrors

# Note that if any of these settings are changed from true to false, then
# any pre-existing mirrors using the now-disabled foreign VCS will stop
# updating, new mirrors using the now-disabled foreign VCS will be disallowed
# and attempts to update ANY project settings for a pre-existing project that
# uses a now-disabled foreign VCS source URL will also be disallowed.

# If $mirror is true and $mirror_svn is true then mirrors from svn source
# repositories will be allowed (and be converted to Git).  These URLs have
# the form svn://... or svn+http://... or svn+https://...
# Note that for this to work the "svn" command line command must be available
# in PATH and the "git svn" commands must work (which generally requires both
# Perl and the subversion perl bindings be installed).
our $mirror_svn = 1;

# If $mirror is true and $mirror_darcs is true then mirrors from darcs source
# repositories will be allowed (and be converted to Git).  These URLs have
# the form darcs://...
# Note that for this to work the "darcs" command line command must be available
# in PATH and so must python (required to run the darcs-fast-export script).
our $mirror_darcs = 1;

# If $mirror is true and $mirror_bzr is true then mirrors from bzr source
# repositories will be allowed (and be converted to Git).  These URLs have
# the form bzr://...
# Note that for this to work the "bzr" command line command must be available
# in PATH (it's a python script so python is required as well).
our $mirror_bzr = 1;

# If $mirror is true and $mirror_hg is true then mirrors from hg source
# repositories will be allowed (and be converted to Git).  These URLs have
# the form hg+http://... or hg+https://...
# Note that for this to work the "hg" command line command must be available
# in PATH and so must python (required to run the hg-fast-export.py script).
# Note that if the PYTHON environment variable is set that will be used instead
# of just plain "python" to run the hg-fast-export.py script (which needs to
# be able to import from mercurial).
our $mirror_hg = 1;


## Paths

# Path where the main chunk of Girocco files will be installed
# This will get COMPLETELY OVERWRITTEN by each make install!!!
our $basedir = '/home/repo/repomgr';

# Path where the automatically generated non-user certificates will be stored
# (The per-user certificates are always stored in $chroot/etc/sshcerts/)
# This is preserved by each make install and MUST NOT be under $basedir!
# Not used unless $httpspushurl is defined
our $certsdir = '/home/repo/certs';

# The repository collection
# "$reporoot-recyclebin" will also be created for use by toolbox/trash-project.pl
our $reporoot = "/srv/git";

# The repository collection's location within the chroot jail
# Normally $reporoot will be bind mounted onto $chroot/$jailreporoot
# Should NOT start with '/'
our $jailreporoot = "srv/git";

# The chroot for ssh pushing; location for project database and other run-time
# data even in non-chroot setups
our $chroot = "/home/repo/j";

# The gitweb files web directory (corresponds to $gitwebfiles)
# Note that it is safe to place this under $basedir since it's set up after
# $basedir is completely replaced during install time.  Be WARNED, however,
# that normally the install process only adds/replaces things in $webroot,
# but if $webroot is under $basedir then it will be completely removed and
# rebuilt each time "make install" is run.  This will make gitweb/git-browser
# web services very briefly unavailable while this is happening.
our $webroot = "/home/repo/WWW";

# The CGI-enabled web directory (corresponds to $gitweburl and $webadmurl)
our $cgiroot = "/home/repo/WWW";

# A web-accessible symlink to $reporoot (corresponds to $httppullurl, can be undef)
# If using the sample apache.conf (with paths suitably updated) this is not required
# to serve either smart or non-smart HTTP repositories to the Git client
our $webreporoot = "/home/repo/WWW/r";


## Certificates (only used if $httpspushurl is defined)

# path to root certificate (undef to use automatic root cert)
# this certificate is made available for easy download and should be whatever
# the root certificate is for the https certificate being used by the web server
our $rootcert = undef;

# The certificate to sign user push client authentication certificates with (undef for auto)
# The automatically generated certificate should always be fine
our $clientcert = undef;

# The private key for $clientcert (undef for auto)
# The automatically generated key should always be fine
our $clientkey = undef;

# The client certificate chain suffix (a pemseq file to append to user client certs) (undef for auto)
# The automatically generated chain should always be fine
# This suffix will also be appended to the $mobusercert before making it available for download
our $clientcertsuffix = undef;

# The mob user certificate signed by $clientcert (undef for auto)
# The automatically generated certificate should always be fine
# Not used unless $mob is set to 'mob'
# The $clientcertsuffix will be appended before making $mobusercert available for download
our $mobusercert = undef;

# The private key for $mobusercert (undef for auto)
# The automatically generated key should always be fine
# Not used unless $mob is set to 'mob'
our $mobuserkey = undef;

# The key length for automatically generated RSA private keys (in bits).
# These keys are then used to create the automatically generated certificates.
# If undef or set to a value less than 2048, then 2048 will be used.
# Set to 3072 to generate more secure keys/certificates.  Set to 4096 (or higher) for
# even greater security.  Be warned that setting to a non-multiple of 8 and/or greater
# than 4096 could negatively impact compatibility with some clients.
# The values 2048, 3072 and 4096 are expected to be compatible with all clients.
# Note that OpenSSL has no problem with > 4096 or non-multiple of 8 lengths.
# See also the $min_key_length setting above to restrict user key sizes.
# This value is also used when generating the ssh_host_rsa_key for the chroot jail sshd.
# RECOMMENDED VALUE: 3072
our $rsakeylength = undef;


## URL addresses

# URL of the gitweb.cgi script (must be in pathinfo mode)
# If mod_rewrite is enabled and the sample apache.conf configuration is used
# (with paths suitably updated), the trailing "/w" is optional for all browsers
# that send a User-Agent string WITHOUT (case insensitively) "git/".  Alternatively
# a minor change to the sample apache.conf can redirect (301 or 302) URLs without
# the "/w" to a URL with it where appropriate.
our $gitweburl = "http://repo.or.cz/w";

# URL of the extra gitweb files (CSS, .js files, images, ...)
our $gitwebfiles = "http://repo.or.cz";

# URL of the Girocco CGI web admin interface (Girocco cgi/ subdirectory)
our $webadmurl = "http://repo.or.cz";

# URL of the Girocco CGI html templater (Girocco cgi/html.cgi)
our $htmlurl = "http://repo.or.cz/h";

# HTTP URL of the repository collection (undef if N/A)
# If mod_rewrite is enabled and the sample apache.conf configuration is used
# (with paths suitably updated), the trailing "/r" is optional for Git clients
# that send a User-Agent string containing "git/" (case insensitively).
our $httppullurl = "http://repo.or.cz";

# HTTPS push URL of the repository collection (undef if N/A)
# If this is defined, the openssl command must be available
# The sample apache.conf configuration requires mod_rewrite be enabled to
# support https push operations.
# Normally this should be set to $httppullurl with http: replaced with https:
# If the sample apache.conf configuration is used (with paths suitably updated),
# the trailing "/r" is optional for Git clients that send a User-Agent string
# containing "git/" (case insensitively).
our $httpspushurl = "https://repo.or.cz";

# Git URL of the repository collection (undef if N/A)
# (You need to set up git-daemon on your system, and Girocco will not
# do this particular thing for you.)
our $gitpullurl = "git://repo.or.cz";

# Pushy SSH URL of the repository collection (undef if N/A)
# Note that the "/$jailreporoot" portion is optional and will be automatically
# added if appropriate when omitted by the client so this URL can typically
# be made the same as $gitpullurl with git: replaced with ssh:
our $pushurl = "ssh://repo.or.cz";

# URL of gitweb of this Girocco instance (set to undef if you're not nice
# to the community)
our $giroccourl = "$Girocco::Config::gitweburl/girocco.git";


## Some templating settings

# Legal warning (on reguser and regproj pages)
our $legalese = <<EOT;
<p>By submitting this form, you are confirming that you will mirror or push
only free software and redistributing it will not violate any law
of Czech Republic.
<sup><a href="/h/about.html">(more details)</a></sup>
</p>
EOT

# Pre-configured mirror sources (set to undef for none)
# Arrayref of name - record pairs, the record has these attributes:
#       label: The label of this source
#       url: The template URL; %1, %2, ... will be substituted for inputs
#       desc: Optional VERY short description
#       link: Optional URL to make the desc point at
#       inputs: Arrayref of hashref input records:
#               label: Label of input record 
#               suffix: Optional suffix
#       If the inputs arrayref is undef, single URL input is shown,
#       pre-filled with url (probably empty string).
our $mirror_sources = [
        {
                label => 'Anywhere',
                url => '',
                desc => 'Any HTTP/Git/rsync pull URL - bring it on!',
                inputs => undef
        },
        {
                label => 'GitHub',
                url => 'git://github.com/%1/%2.git',
                desc => 'GitHub Social Code Hosting',
                link => 'http://github.com/',
                inputs => [ { label => 'User:' }, { label => 'Project:', suffix => '.git' } ]
        },
        {
                label => 'Gitorious',
                url => 'git://gitorious.org/%1/%2.git',
                desc => 'Green and Orange Boxes',
                link => 'http://gitorious.org/',
                inputs => [ { label => 'Project:' }, { label => 'Repository:', suffix => '.git' } ]
        }
];

# You can customize the gitweb interface widely by editing
# gitweb/gitweb_config.perl


## Permission settings

# Girocco needs some way to manipulate write permissions to various parts of
# all repositories; this concerns three entities:
# - www-data: the web interface needs to be able to rewrite few files within
# the repository
# - repo: a user designated for cronjobs; handles mirroring and repacking;
# this one is optional if not $mirror
# - others: the designated users that are supposed to be able to push; they
# may have account either within chroot, or outside of it

# There are several ways how to use Girocco based on a combination of the
# following settings.

# (Non-chroot) UNIX user the CGI scripts run on; note that if some non-related
# untrusted CGI scripts run on this account too, that can be a big security
# problem and you'll probably need to set up suexec (poor you).
# This must always be set.
our $cgi_user = 'www-data';

# (Non-chroot) UNIX user performing mirroring jobs; this is the user who
# should run all the daemons and cronjobs and
# the user who should be running make install (if not root).
# This must always be set.
our $mirror_user = 'repo';

# (Non-chroot) UNIX group owning the repositories by default; it owns whole
# mirror repositories and at least web-writable metadata of push repositories.
# If you undefine this, all the data will become WORLD-WRITABLE.
# Both $cgi_user and $mirror_user should be members of this group!
our $owning_group = 'repo';

# Whether to use chroot jail for pushing; this must be always the same
# as $manage_users.
# TODO: Gitosis support for $manage_users and not $chrooted?
our $chrooted = $manage_users;

# How to control permissions of push-writable data in push repositories:
# * 'Group' for the traditional model: The $chroot/etc/group project database
#   file is used as the UNIX group(5) file; the directories have gid appropriate
#   for the particular repository and are group-writable. This works only if
#   $chrooted so that users are put in the proper groups on login when using
#   SSH push.  Smart HTTPS push does not require a chroot to work -- simply
#   run "make install" as the non-root $mirror_user user, but leave
#   $manage_users and $chrooted enabled.
# * 'ACL' for a model based on POSIX ACL: The directories are coupled with ACLs
#   listing the users with push permissions. This works for both chroot and
#   non-chroot setups, however it requires ACL support within the filesystem.
#   This option is BASICALLY UNTESTED, too. And UNIMPLEMENTED. :-)
# * 'Hooks' for a relaxed model: The directories are world-writable and push
#   permission control is purely hook-driven. This is INSECURE and works only
#   when you trust all your users; on the other hand, the attack vectors are
#   mostly just DoS or fully-traceable tinkering.
our $permission_control = 'Group';

# Path to alternate screen multiuser acl file (see screen/README, undef for none)
our $screen_acl_file = undef;


## sendmail.pl configuration

# Full information on available sendmail.pl settings can be found by running
# ../bin/sendmail.pl -v -h

# These settings will only used if $sendmail_bin is set to 'sendmail.pl'

# sendmail.pl host name
#$ENV{'SENDMAIL_PL_HOST'} = 'localhost'; # localhost is the default

# sendmail.pl port name
#$ENV{'SENDMAIL_PL_PORT'} = '25'; # port 25 is the default

# sendmail.pl nc executable
#$ENV{'SENDMAIL_PL_NCBIN'} = "$chroot/bin/nc.openbsd"; # default is nc found in $PATH

# sendmail.pl nc options
# multiple options may be included, e.g. '-4 -X connect -x 192.168.100.10:8080'
#$ENV{'SENDMAIL_PL_NCOPT'} = '-4'; # force IPv4, default is to allow IPv4 & IPv6


## Sanity checks & defaults

# Couple of sanity checks and default settings (do not change these)
use Digest::MD5 qw(md5);
use MIME::Base64 qw(encode_base64);
$nickname = (split(/[.]/, $name))[0] unless $nickname;
our $tmpsuffix = substr(encode_base64(md5($name.':'.$nickname)),0,6);
$tmpsuffix =~ tr,+/,=_,;
($mirror_user) or die "Girocco::Config: \$mirror_user must be set even if to current user";
($basedir) or die "Girocco::Config: \$basedir must be set";
($sendmail_bin) or die "Girocco::Config: \$sendmail_bin must be set";
$sendmail_bin = "$basedir/bin/sendmail.pl" if $sendmail_bin eq "sendmail.pl";
$screen_acl_file = "$basedir/screen/giroccoacl" unless $screen_acl_file;
$jailreporoot =~ s,^/+,,;
($reporoot) or die "Girocco::Config \$reporoot must be set";
($jailreporoot) or die "Girocco::Config \$jailreporoot must be set";
(not $mob or $mob eq 'mob') or die "Girocco::Config \$mob must be undef (or '') or 'mob'";
(not $min_key_length or $min_key_length =~ /^[1-9][0-9]*$/)
        or die "Girocco::Config \$min_key_length must be undef or numeric";
$admincc = $admincc ? 1 : 0;
$rootcert = "$certsdir/girocco_root_crt.pem" if $httpspushurl && !$rootcert;
$clientcert = "$certsdir/girocco_client_crt.pem" if $httpspushurl && !$clientcert;
$clientkey = "$certsdir/girocco_client_key.pem" if $httpspushurl && !$clientkey;
$clientcertsuffix = "$certsdir/girocco_client_suffix.pem" if $httpspushurl && !$clientcertsuffix;
$mobusercert = "$certsdir/girocco_mob_user_crt.pem" if $httpspushurl && $mob && !$mobusercert;
$mobuserkey = "$certsdir/girocco_mob_user_key.pem" if $httpspushurl && $mob && !$mobuserkey;
our $mobpushurl = $pushurl;
$mobpushurl =~ s,^ssh://,ssh://mob@,i if $mobpushurl;
$disable_dsa = 1 unless $pushurl;
$disable_dsa = $disable_dsa ? 1 : '';
our $httpdnsname = ($gitweburl =~ m,https?://([A-Za-z0-9.-]+),i) ? lc($1) : undef if $gitweburl;
our $httpsdnsname = ($httpspushurl =~ m,https://([A-Za-z0-9.-]+),i) ? lc($1) : undef if $httpspushurl;
($mirror or $push) or die "Girocco::Config: neither \$mirror nor \$push is set?!";
(not $push or ($pushurl or $httpspushurl or $gitpullurl or $httppullurl)) or die "Girocco::Config: no pull URL is set";
(not $push or ($pushurl or $httpspushurl)) or die "Girocco::Config: \$push set but \$pushurl and \$httpspushurl are undef";
(not $mirror or $mirror_user) or die "Girocco::Config: \$mirror set but \$mirror_user is undef";
($manage_users == $chrooted) or die "Girocco::Config: \$manage_users and \$chrooted must be set to the same value";
(not $chrooted or $permission_control ne 'ACL') or die "Girocco::Config: resolving uids for ACL not supported when using chroot";
(grep { $permission_control eq $_ } qw(Group Hooks)) or die "Girocco::Config: \$permission_control must be set to Group or Hooks";
($chrooted or not $mob) or die "Girocco::Config: mob user supported only in the chrooted mode";
(not $httpspushurl or $httpsdnsname) or die "Girocco::Config invalid \$httpspushurl does not start with https://domainname";

# Make sure Git has a consistent and reproducible environment

$ENV{'XDG_CONFIG_HOME'} = $chroot.'/var/empty';
$ENV{'HOME'} = $chroot.'/etc/girocco';
$ENV{'GIT_CONFIG_NOSYSTEM'} = 1;
$ENV{'GIT_ATTR_NOSYSTEM'} = 1;
$ENV{'GIT_TERMINAL_PROMPT'} = 0;
$ENV{'GIT_ASKPASS'} = $basedir.'/bin/git-askpass-password';
delete $ENV{'GIT_USER_AGENT'};
$ENV{'GIT_USER_AGENT'} = $git_client_ua if defined($git_client_ua);
delete $ENV{'GIT_HTTP_USER_AGENT'};
$ENV{'GIT_HTTP_USER_AGENT'} = $git_client_ua if defined($git_client_ua);

1;