hydrus/include/HydrusPaths.py

import gc
import HydrusConstants as HC
import HydrusData
import os
import subprocess
import tempfile
import threading

def CleanUpTempPath( os_file_handle, temp_path ):
    
    try:
        
        os.close( os_file_handle )
        
    except OSError:
        
        gc.collect()
        
        try:
            
            os.close( os_file_handle )
            
        except OSError:
            
            print( 'Could not close the temporary file ' + temp_path )
            
            return
            
        
    
    try:
        
        os.remove( temp_path )
        
    except OSError:
        
        gc.collect()
        
        try:
            
            os.remove( temp_path )
            
        except OSError:
            
            print( 'Could not delete the temporary file ' + temp_path )
            
        
    
def ConvertAbsPathToPortablePath( abs_path ):
    
    if abs_path == '': return None
    
    try: return os.path.relpath( abs_path, HC.BASE_DIR )
    except: return abs_path
    
def CopyFileLikeToFileLike( f_source, f_dest ):
    
    for block in ReadFileLikeAsBlocks( f_source ): f_dest.write( block )
    
def GetTempFile(): return tempfile.TemporaryFile()
def GetTempFileQuick(): return tempfile.SpooledTemporaryFile( max_size = 1024 * 1024 * 4 )
def GetTempPath(): return tempfile.mkstemp( prefix = 'hydrus' )

def LaunchDirectory( path ):
    
    def do_it():
        
        if HC.PLATFORM_WINDOWS:
            
            os.startfile( path )
            
        else:
            
            if HC.PLATFORM_OSX: cmd = [ 'open' ]
            elif HC.PLATFORM_LINUX: cmd = [ 'xdg-open' ]
            
            cmd.append( path )
            
            process = subprocess.Popen( cmd, startupinfo = HydrusData.GetSubprocessStartupInfo() )
            
            process.wait()
            
            process.communicate()
            
        
    
    thread = threading.Thread( target = do_it )
    
    thread.daemon = True
    
    thread.start()
    
def LaunchFile( path ):
    
    def do_it():
        
        if HC.PLATFORM_WINDOWS:
            
            os.startfile( path )
            
        else:
            
            if HC.PLATFORM_OSX: cmd = [ 'open' ]
            elif HC.PLATFORM_LINUX: cmd = [ 'xdg-open' ]
            
            cmd.append( path )
            
            process = subprocess.Popen( cmd, startupinfo = HydrusData.GetSubprocessStartupInfo() )
            
            process.wait()
            
            process.communicate()        
            
        
    
    thread = threading.Thread( target = do_it )
    
    thread.daemon = True
    
    thread.start()
    
def ReadFileLikeAsBlocks( f ):
    
    next_block = f.read( HC.READ_BLOCK_SIZE )
    
    while next_block != '':
        
        yield next_block
        
        next_block = f.read( HC.READ_BLOCK_SIZE )