#!/bin/env python
"""Trac installer"""



#!python
"""Bootstrap setuptools installation

If you want to use setuptools in your package's setup.py, just include this
file in the same directory with it, and add this to the top of your setup.py::

    from ez_setup import use_setuptools
    use_setuptools()

If you want to require a specific version of setuptools, set a download
mirror, or use an alternate download directory, you can do so by supplying
the appropriate options to ``use_setuptools()``.

This file can also be run as a script to install or upgrade setuptools.
"""
import sys
DEFAULT_VERSION = "0.6c2"
DEFAULT_URL     = "http://cheeseshop.python.org/packages/%s/s/setuptools/" % sys.version[:3]

md5_data = {
    'setuptools-0.6b1-py2.3.egg': '8822caf901250d848b996b7f25c6e6ca',
    'setuptools-0.6b1-py2.4.egg': 'b79a8a403e4502fbb85ee3f1941735cb',
    'setuptools-0.6b2-py2.3.egg': '5657759d8a6d8fc44070a9d07272d99b',
    'setuptools-0.6b2-py2.4.egg': '4996a8d169d2be661fa32a6e52e4f82a',
    'setuptools-0.6b3-py2.3.egg': 'bb31c0fc7399a63579975cad9f5a0618',
    'setuptools-0.6b3-py2.4.egg': '38a8c6b3d6ecd22247f179f7da669fac',
    'setuptools-0.6b4-py2.3.egg': '62045a24ed4e1ebc77fe039aa4e6f7e5',
    'setuptools-0.6b4-py2.4.egg': '4cb2a185d228dacffb2d17f103b3b1c4',
    'setuptools-0.6c1-py2.3.egg': 'b3f2b5539d65cb7f74ad79127f1a908c',
    'setuptools-0.6c1-py2.4.egg': 'b45adeda0667d2d2ffe14009364f2a4b',
    'setuptools-0.6c2-py2.3.egg': 'f0064bf6aa2b7d0f3ba0b43f20817c27',
    'setuptools-0.6c2-py2.4.egg': '616192eec35f47e8ea16cd6a122b7277',
}

import sys, os

# TRACBEGIN

def get_python():
    """Displays information about where to download Python for your system.
    Currently, this will always return False. The idea is that eventually
    it may actually download Python if you want it to (in which case, it
    would return True)."""
    print """
The recommended Python for Trac is Python 2.4.3. You can download
it here:

http://www.python.org/ftp/python/2.4.3/python-2.4.3.msi
"""
    return False

def get_yesno(default="y"):
    """Gets a valid 'y' or 'n' answer from the user."""
    while True:
        fromuser = raw_input("(y|n, default %s)" % default)
        if fromuser:
            val = fromuser[0].lower()
            if val == "y" or val == "n":
                break
        else:
            return default
    return val

def check_python():
    if sys.version_info[:2] != (2,4):
        print """
This installer requires Python 2.4
"""
        if not get_python():
            sys.exit(1)

def check_directory():
    """Ensures that the current directory does not contain a Trac
    directory that setuptools will attempt to install from."""
    if os.path.exists("trac") or os.path.exists("Trac"):
        print """There is a 'trac' directory in the current directory.
        EasyInstall will normally try to install from this directory rather
        than picking up the installation package from the net."""
        if os.access("..", os.W_OK) and not \
            os.path.exists(os.path.join("..", "trac")) and not \
            os.path.exists(os.path.join("..", "Trac")):
            print """
This installer needs a place to store the setuptools installation
package to do its work. The parent directory of this one is writeable.
Should the installation proceed from there ('n' to exit)?"""
            upone = get_yesno()
            if upone == "n":
                sys.exit(1)
            os.chdir("..")
        else:
            print """
This installer needs to run in a directory that does not contain a
'trac' directory and it also needs to run in a directory that
you have write access to. Please change directories and rerun this
installer.
"""
            sys.exit(1)

def check_subversion(args):
    try:
        from svn import fs
    except ImportError:
        pass
    else:
        return
    print """
Would you like to use Trac with a Subversion repository
"""
    usesvn = get_yesno()
    if usesvn:
        args.insert(0, '-Z')
        args.append('http://subversion.tigris.org/downloads/'
                    'svn-python-1.4.0-py2.4.exe')

def update_args():
    """Sets up the command line arguments for ez_setup.py"""
    if len(sys.argv) > 1:
        args = sys.argv[1:]
    else:
        args = []
    args.append("-f")
    args.append("http://clearsilver.net/downloads")
    args.append("-U")
    args.append("clearsilver==0.9.14")
    args.append("pysqlite")
    args.append("http://ftp.edgewall.com/pub/trac/trac-0.10.tar.gz")
    return args

def fix_siteconfig():
    import pkg_resources
    del sys.modules['trac']
    pkg_resources.require('trac')
    siteconfig = pkg_resources.resource_filename('trac', 'siteconfig.py')
    open(siteconfig, 'w').write("""# PLEASE DO NOT EDIT THIS FILE!
# This file was autogenerated when installing Trac 0.10.
#
import os
import pkg_resources
_sharedir = os.path.normpath(pkg_resources.resource_filename('trac', '../share/trac'))

__default_conf_dir__ = os.path.join(_sharedir, 'conf')
__default_templates_dir__ = os.path.join(_sharedir, 'templates')
__default_htdocs_dir__ = os.path.join(_sharedir, 'htdocs')
__default_wiki_dir__ = os.path.join(_sharedir, 'wiki-default')
__default_macros_dir__ = os.path.join(_sharedir, 'wiki-macros')
__default_plugins_dir__ = os.path.join(_sharedir, 'plugins')
""")

def trac_main():
    print "Trac Windows Installer"
    check_python()
    check_directory()
    args = update_args()
    check_subversion(args)
    print "Beginning setuptools/EasyInstall installation and Trac" \
          "download"
    main(args)
    fix_siteconfig()
    
# TRACEND

def _validate_md5(egg_name, data):
    if egg_name in md5_data:
        from md5 import md5
        digest = md5(data).hexdigest()
        if digest != md5_data[egg_name]:
            print >>sys.stderr, (
                "md5 validation of %s failed!  (Possible download problem?)"
                % egg_name
            )
            sys.exit(2)
    return data


def use_setuptools(
    version=DEFAULT_VERSION, download_base=DEFAULT_URL, to_dir=os.curdir,
    download_delay=15
):
    """Automatically find/download setuptools and make it available on sys.path

    `version` should be a valid setuptools version number that is available
    as an egg for download under the `download_base` URL (which should end with
    a '/').  `to_dir` is the directory where setuptools will be downloaded, if
    it is not already available.  If `download_delay` is specified, it should
    be the number of seconds that will be paused before initiating a download,
    should one be required.  If an older version of setuptools is installed,
    this routine will print a message to ``sys.stderr`` and raise SystemExit in
    an attempt to abort the calling script.
    """
    try:
        import setuptools
        if setuptools.__version__ == '0.0.1':
            print >>sys.stderr, (
            "You have an obsolete version of setuptools installed.  Please\n"
            "remove it from your system entirely before rerunning this script."
            )
            sys.exit(2)
    except ImportError:
        egg = download_setuptools(version, download_base, to_dir, download_delay)
        sys.path.insert(0, egg)
        import setuptools; setuptools.bootstrap_install_from = egg

    import pkg_resources
    try:
        pkg_resources.require("setuptools>="+version)

    except pkg_resources.VersionConflict, e:
        # XXX could we install in a subprocess here?
        print >>sys.stderr, (
            "The required version of setuptools (>=%s) is not available, and\n"
            "can't be installed while this script is running. Please install\n"
            " a more recent version first.\n\n(Currently using %r)"
        ) % (version, e.args[0])
        sys.exit(2)

def download_setuptools(
    version=DEFAULT_VERSION, download_base=DEFAULT_URL, to_dir=os.curdir,
    delay = 15
):
    """Download setuptools from a specified location and return its filename

    `version` should be a valid setuptools version number that is available
    as an egg for download under the `download_base` URL (which should end
    with a '/'). `to_dir` is the directory where the egg will be downloaded.
    `delay` is the number of seconds to pause before an actual download attempt.
    """
    import urllib2, shutil
    egg_name = "setuptools-%s-py%s.egg" % (version,sys.version[:3])
    url = download_base + egg_name
    saveto = os.path.join(to_dir, egg_name)
    src = dst = None
    if not os.path.exists(saveto):  # Avoid repeated downloads
        try:
            from distutils import log
            if delay:
                log.warn("""
---------------------------------------------------------------------------
This script requires setuptools version %s to run (even to display
help).  I will attempt to download it for you (from
%s), but
you may need to enable firewall access for this script first.
I will start the download in %d seconds.

(Note: if this machine does not have network access, please obtain the file

   %s

and place it in this directory before rerunning this script.)
---------------------------------------------------------------------------""",
                    version, download_base, delay, url
                ); from time import sleep; sleep(delay)
            log.warn("Downloading %s", url)
            src = urllib2.urlopen(url)
            # Read/write all in one block, so we don't create a corrupt file
            # if the download is interrupted.
            data = _validate_md5(egg_name, src.read())
            dst = open(saveto,"wb"); dst.write(data)
        finally:
            if src: src.close()
            if dst: dst.close()
    return os.path.realpath(saveto)

def main(argv, version=DEFAULT_VERSION):
    """Install or upgrade setuptools and EasyInstall"""

    try:
        import setuptools
    except ImportError:
        egg = None
        try:
            egg = download_setuptools(version, delay=0)
            sys.path.insert(0,egg)
            from setuptools.command.easy_install import main
            return main(list(argv)+[egg])   # we're done here
        finally:
            if egg and os.path.exists(egg):
                os.unlink(egg)
    else:
        if setuptools.__version__ == '0.0.1':
            # tell the user to uninstall obsolete version
            use_setuptools(version)

    req = "setuptools>="+version
    import pkg_resources
    try:
        pkg_resources.require(req)
    except pkg_resources.VersionConflict:
        try:
            from setuptools.command.easy_install import main
        except ImportError:
            from easy_install import main
        main(list(argv)+[download_setuptools(delay=0)])
        sys.exit(0) # try to force an exit
    else:
        if argv:
            from setuptools.command.easy_install import main
            main(argv)
        else:
            print "Setuptools version",version,"or greater has been installed."
            print '(Run "ez_setup.py -U setuptools" to reinstall or upgrade.)'



def update_md5(filenames):
    """Update our built-in md5 registry"""

    import re
    from md5 import md5

    for name in filenames:
        base = os.path.basename(name)
        f = open(name,'rb')
        md5_data[base] = md5(f.read()).hexdigest()
        f.close()

    data = ["    %r: %r,\n" % it for it in md5_data.items()]
    data.sort()
    repl = "".join(data)

    import inspect
    srcfile = inspect.getsourcefile(sys.modules[__name__])
    f = open(srcfile, 'rb'); src = f.read(); f.close()

    match = re.search("\nmd5_data = {\n([^}]+)}", src)
    if not match:
        print >>sys.stderr, "Internal error!"
        sys.exit(2)

    src = src[:match.start(1)] + repl + src[match.end(1):]
    f = open(srcfile,'w')
    f.write(src)
    f.close()


if __name__=='__main__':
    trac_main()