hydrus/client.py

#!/usr/bin/env python3

# This program is free software. It comes without any warranty, to
# the extent permitted by applicable law. You can redistribute it
# and/or modify it under the terms of the Do What The Fuck You Want
# To Public License, Version 2, as published by Sam Hocevar. See
# http://sam.zoy.org/wtfpl/COPYING for more details.

try:
    
    from include import HydrusPy2To3
    
    import wx
    
    HydrusPy2To3.do_2to3_test( wx_error_display_callable = wx.SafeShowMessage )
    
    from include import HydrusExceptions
    from include import HydrusConstants as HC
    from include import HydrusData
    from include import HydrusPaths
    
    import os
    import sys
    import time
    
    from include import ClientController
    import threading
    from include import HydrusGlobals as HG
    from include import HydrusLogger
    import traceback
    
    try:
        
        from twisted.internet import reactor
        
    except:
        
        HG.twisted_is_broke = True
        
    
    #
    
    import argparse
    
    argparser = argparse.ArgumentParser( description = 'hydrus network client (console)' )
    
    argparser.add_argument( '-d', '--db_dir', help = 'set an external db location' )
    argparser.add_argument( '--temp_dir', help = 'override the program\'s temporary directory' )
    argparser.add_argument( '--no_daemons', action='store_true', help = 'run without background daemons' )
    argparser.add_argument( '--no_wal', action='store_true', help = 'run without WAL db journaling' )
    argparser.add_argument( '--db_memory_journaling', action='store_true', help = 'run db journaling entirely in memory (DANGEROUS)' )
    argparser.add_argument( '--db_synchronous_override', help = 'override SQLite Synchronous PRAGMA (range 0-3, default=2)' )
    argparser.add_argument( '--no_db_temp_files', action='store_true', help = 'run db temp operations entirely in memory' )
    
    result = argparser.parse_args()
    
    if result.db_dir is None:
        
        db_dir = HC.DEFAULT_DB_DIR
        
        if not HydrusPaths.DirectoryIsWritable( db_dir ) or HC.RUNNING_FROM_OSX_APP:
            
            db_dir = HC.USERPATH_DB_DIR
            
        
    else:
        
        db_dir = result.db_dir
        
    
    db_dir = HydrusPaths.ConvertPortablePathToAbsPath( db_dir, HC.BASE_DIR )
    
    try:
        
        HydrusPaths.MakeSureDirectoryExists( db_dir )
        
    except:
        
        raise Exception( 'Could not ensure db path "{}" exists! Check the location is correct and that you have permission to write to it!'.format( db_dir ) )
        
    
    if not os.path.isdir( db_dir ):
        
        raise Exception( 'The given db path "{}" is not a directory!'.format( db_dir ) )
        
    
    if not HydrusPaths.DirectoryIsWritable( db_dir ):
        
        raise Exception( 'The given db path "{}" is not a writable-to!'.format( db_dir ) )
        
    
    HG.no_daemons = result.no_daemons
    HG.no_wal = result.no_wal
    HG.db_memory_journaling = result.db_memory_journaling
    
    if result.db_synchronous_override is not None:
        
        try:
            
            db_synchronous_override = int( result.db_synchronous_override )
            
        except ValueError:
            
            raise Exception( 'db_synchronous_override must be an integer in the range 0-3' )
            
        
        if db_synchronous_override not in range( 4 ):
            
            raise Exception( 'db_synchronous_override must be in the range 0-3' )
            
        
    
    HG.no_db_temp_files = result.no_db_temp_files
    
    if result.temp_dir is not None:
        
        HydrusPaths.SetEnvTempDir( result.temp_dir )
        
    
except Exception as e:
    
    import traceback
    import os
    
    error_trace = traceback.format_exc()
    
    print( error_trace )
    
    wx.SafeShowMessage( 'critical boot error!', 'Critical boot error occurred! Details written to crash.log!' + os.linesep * 2 + str( e ) )
    
    if 'db_dir' in locals() and os.path.exists( db_dir ):
        
        dest_path = os.path.join( db_dir, 'crash.log' )
        
        with open( dest_path, 'w', encoding = 'utf-8' ) as f:
            
            f.write( error_trace )
            
        
        print( 'Critical boot error occurred! Details written to crash.log!' )
        
    
    sys.exit( 1 )
    
controller = None

with HydrusLogger.HydrusLogger( db_dir, 'client' ) as logger:
    
    try:
        
        HydrusData.Print( 'hydrus client started' )
        
        if not HG.twisted_is_broke:
            
            threading.Thread( target = reactor.run, name = 'twisted', kwargs = { 'installSignalHandlers' : 0 } ).start()
            
        
        controller = ClientController.Controller( db_dir )
        
        controller.Run()
        
    except:
        
        HydrusData.Print( 'hydrus client failed' )
        
        HydrusData.Print( traceback.format_exc() )
        
        try:
            
            message = 'The client failed to start. The error follows (it has also been written to the log in the db directory). If it is not obvious, please inform hydrus dev.'
            
            message += os.linesep * 2
            
            message += traceback.format_exc()
            
            wx.SafeShowMessage( 'hydrus client failed', message )
            
        except:
            
            pass
            
        
    finally:
        
        HG.view_shutdown = True
        HG.model_shutdown = True
        
        if controller is not None:
            
            controller.pubimmediate( 'wake_daemons' )
            
        
        reactor.callFromThread( reactor.stop )
        
        HydrusData.Print( 'hydrus client shut down' )
        
    

HG.shutdown_complete = True

if HG.restart:
    
    HydrusData.RestartProcess()