#!/usr/bin/env python

import sys

import shutil

import os

import pwd

import subprocess

# This must be run as root, because it must create an hg user.

# Normally the clean thing to do is let it fail with a permission error

# if a non-root user tries to run it, but I don't want anyone thinking

# that they can make it work as non-root by changing install paths.

# Patches welcome for doing this more cleanly of course.

if os.getgid() != 0:

    print >>sys.stderr, "Install must be run as root user"

    sys.exit(-1)

if len(sys.argv) > 2:

    print >>sys.stderr, "Usage: install [<destination-prefix>]"

    sys.exit(-1)

if len(sys.argv) == 2:

    dest = sys.argv[1] + '/lib/mercurial-server'

else:

    dest = '/usr/local/lib/mercurial-server'

def installFiles(d, *sources):

    os.makedirs(d)

    for f in sources:

        shutil.copy(f, d)

installFiles(dest,

    'src/hg-ssh',

    'src/refresh-auth')

installFiles(dest + '/mercurialserver',

    'src/mercurialserver/__init__.py',

    'src/mercurialserver/paths.py',

    'src/mercurialserver/changes.py',

    'src/mercurialserver/access.py',

    'src/mercurialserver/servelog.py',

    'src/mercurialserver/refreshauth.py',

    'src/mercurialserver/ruleset.py')

installFiles(dest + '/init',

    'src/init/hginit',

    'src/init/hgadmin-hgrc')

installFiles('/etc/mercurial-server',

    'src/init/conf/remote-hgrc',

    'src/init/conf/access.conf')

installFiles('/etc/mercurial-server/keys/root')

installFiles('/etc/mercurial-server/keys/users')

def becomeFunc(u):

    p = pwd.getpwnam(u)

    def become():

        os.setgid(p.pw_gid)

        os.setegid(p.pw_gid)

        os.setuid(p.pw_uid)

        os.seteuid(p.pw_uid)

    return become

try:

   pwd.getpwnam('hg')

except KeyError:

    subprocess.check_call(

        "adduser --system --shell /bin/sh --group --disabled-password".split() + 

        ["--gecos", "Mercurial repositories", "hg"])

    subprocess.check_call([dest + '/init/hginit'], preexec_fn = becomeFunc('hg'))