"""Trac backup plugin for backup system.

Hotcopy's are performed via the trac-admin command:
    trac-admin /path/to/env hotcopy /path/to/dest
"""

import plugins, os

config = False
location = ''
nlocations = []

def init(cfg, *args, **kwargs):
    global location, nlocations, config
    config = cfg
    if len(args) != 1:
        if kwargs.has_key('location'):
            location = kwargs['location']
        else:
            raise plugins.PluginError
    else:
        location = args[0]
        nlocations = plugins.normalize_path(args[0], cwd=False)

def pre():
    """Prepare a copy of the trac install using the hotcopy command."""
    mkdir = "mkdir -p /tmp%s"
    cmd = "trac-admin %s hotcopy /tmp%s"
    if nlocations:
        for loc in nlocations:
            # trac's hotcopy requires the directory to not exist
            c = cmd % (loc, loc)
            m = mkdir % os.path.dirname(loc)
            print '>>>', m
            plugins.print_exec(m)
            print '>>>', c
            plugins.print_exec(c)
    else:
        c = cmd % (location, location)
        m = mkdir % os.path.dirname(location)
        print '>>>', m
        plugins.print_exec(m)
        print '>>>', c
        plugins.print_exec(c)

def run():
    """Backup all of the trac copies in /tmp.
    Read the rsync manpage in the 'relative' section to see why,
    but we want to run rsync with the source /tmp/./path/to/trac"""
    rsync = config.rsync()
    dest = config.destination()
    # we want rsync + source + dest
    def source(loc):
        return '/tmp/.%s ' % loc
    if nlocations:
        for loc in nlocations:
            c = rsync + source(loc) + dest
            print '>r>', c
            plugins.print_exec(c)
    else:
        c = rsync + source(location) + dest
        print '>r>', c
        plugins.print_exec(c)

def post():
    global config, location, nlocations
    cmd = "rm -rf /tmp%s"
    if nlocations:
        for loc in nlocations:
            print '<<<', cmd % loc
            plugins.print_exec(cmd % loc)
    else:
        print '<<<', cmd % location
        plugins.print_exec(cmd % location)
    config = False
    location = ''
    nlocations = []