Warning

This document is for an old release of Galaxy. You can alternatively view this page in the latest release if it exists or view the top of the latest release's documentation.

Source code for galaxy.webapps.tool_shed.util.hgweb_config

import os
import ConfigParser
import logging
import shutil
import threading
from datetime import date

log = logging.getLogger( __name__ )

new_hgweb_config_template = """
[paths]

"""


[docs]class HgWebConfigManager( object ):
[docs] def __init__( self ): self.hgweb_config_dir = None self.in_memory_config = None
[docs] def add_entry( self, lhs, rhs ): """Add an entry in the hgweb.config file for a new repository.""" lock = threading.Lock() lock.acquire( True ) try: # Since we're changing the config, make sure the latest is loaded into memory. self.read_config( force_read=True ) # An entry looks something like: repos/test/mira_assembler = database/community_files/000/repo_123. if rhs.startswith( './' ): rhs = rhs.replace( './', '', 1 ) self.make_backup() # Add the new entry into memory. self.in_memory_config.set( 'paths', lhs, rhs ) # Persist our in-memory configuration. self.write_config() except Exception as e: log.debug( "Exception in HgWebConfigManager.add_entry(): %s" % str( e ) ) finally: lock.release()
[docs] def change_entry( self, old_lhs, new_lhs, new_rhs ): """Change an entry in the hgweb.config file for a repository - this only happens when the owner changes the name of the repository.""" lock = threading.Lock() lock.acquire( True ) try: self.make_backup() # Remove the old entry. self.in_memory_config.remove_option( 'paths', old_lhs ) # Add the new entry. self.in_memory_config.set( 'paths', new_lhs, new_rhs ) # Persist our in-memory configuration. self.write_config() except Exception as e: log.debug( "Exception in HgWebConfigManager.change_entry(): %s" % str( e ) ) finally: lock.release()
[docs] def get_entry( self, lhs ): """Return an entry in the hgweb.config file for a repository""" self.read_config() try: entry = self.in_memory_config.get( 'paths', lhs ) except ConfigParser.NoOptionError: try: # We have a multi-threaded front-end, so one of the threads may not have the latest version of the hgweb.config file. self.read_config( force_read=True ) entry = self.in_memory_config.get( 'paths', lhs ) except ConfigParser.NoOptionError: raise Exception( "Entry for repository %s missing in file %s." % ( lhs, self.hgweb_config ) ) return entry
@property def hgweb_config( self ): hgweb_config = os.path.join( self.hgweb_config_dir, 'hgweb.config' ) if not os.path.exists( hgweb_config ): # We used to raise an exception here... # raise Exception( "Required file %s does not exist - check config setting for hgweb_config_dir." % hgweb_config ) # ...but now we just log the missing file and create a new empty one. log.debug( "Required file %s does not exist, so creating a new, empty file. Check your config setting for hgweb_config_dir." % hgweb_config ) hgweb_config_file = open( hgweb_config, 'wb' ) hgweb_config_file.write( new_hgweb_config_template ) hgweb_config_file.close() return os.path.abspath( hgweb_config )
[docs] def make_backup( self ): # Make a backup of the hgweb.config file. today = date.today() backup_date = today.strftime( "%Y_%m_%d" ) hgweb_config_backup_filename = 'hgweb.config_%s_backup' % backup_date hgweb_config_copy = os.path.join( self.hgweb_config_dir, hgweb_config_backup_filename ) shutil.copy( os.path.abspath( self.hgweb_config ), os.path.abspath( hgweb_config_copy ) )
[docs] def read_config( self, force_read=False ): if force_read or self.in_memory_config is None: config = ConfigParser.ConfigParser() config.read( self.hgweb_config ) self.in_memory_config = config
[docs] def write_config( self ): """Writing the in-memory configuration to the hgweb.config file on disk.""" config_file = open( self.hgweb_config, 'wb' ) self.in_memory_config.write( config_file ) config_file.close