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"""
BitBake 'Command' module
Provide an interface to interact with the bitbake server through 'commands'
"""
# Copyright (C) 2006-2007 Richard Purdie
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""
The bitbake server takes 'commands' from its UI/commandline.
Commands are either synchronous or asynchronous.
Async commands return data to the client in the form of events.
Sync commands must only return data through the function return value
and must not trigger events, directly or indirectly.
Commands are queued in a CommandQueue
"""
import bb
async_cmds = {}
sync_cmds = {}
class Command:
"""
A queue of asynchronous commands for bitbake
"""
def __init__(self, cooker):
self.cooker = cooker
self.cmds_sync = CommandsSync()
self.cmds_async = CommandsAsync()
# FIXME Add lock for this
self.currentAsyncCommand = None
for attr in CommandsSync.__dict__:
command = attr[:].lower()
method = getattr(CommandsSync, attr)
sync_cmds[command] = (method)
for attr in CommandsAsync.__dict__:
command = attr[:].lower()
method = getattr(CommandsAsync, attr)
async_cmds[command] = (method)
def runCommand(self, commandline):
try:
command = commandline.pop(0)
if command in CommandsSync.__dict__:
# Can run online commands straight away
return getattr(CommandsSync, command)(self.cmds_sync, self, commandline)
if self.currentAsyncCommand is not None:
return "Busy (%s in progress)" % self.currentAsyncCommand[0]
if command not in CommandsAsync.__dict__:
return "No such command"
self.currentAsyncCommand = (command, commandline)
return True
except:
import traceback
return traceback.format_exc()
def runAsyncCommand(self):
try:
if self.currentAsyncCommand is not None:
(command, options) = self.currentAsyncCommand
getattr(CommandsAsync, command)(self.cmds_async, self, options)
except:
import traceback
self.finishAsyncCommand(traceback.format_exc())
def finishAsyncCommand(self, error = None):
if error:
bb.event.fire(bb.command.CookerCommandFailed(self.cooker.configuration.event_data, error))
else:
bb.event.fire(bb.command.CookerCommandCompleted(self.cooker.configuration.event_data))
self.currentAsyncCommand = None
class CommandsSync:
"""
A class of synchronous commands
These should run quickly so as not to hurt interactive performance.
These must not influence any running synchronous command.
"""
def stateShutdown(self, command, params):
"""
Trigger cooker 'shutdown' mode
"""
command.cooker.cookerAction = bb.cooker.cookerShutdown
def stateStop(self, command, params):
"""
Stop the cooker
"""
command.cooker.cookerAction = bb.cooker.cookerStop
def getCmdLineAction(self, command, params):
"""
Get any command parsed from the commandline
"""
return command.cooker.commandlineAction
def getVariable(self, command, params):
"""
Read the value of a variable from configuration.data
"""
varname = params[0]
expand = True
if len(params) > 1:
expand = params[1]
return bb.data.getVar(varname, command.cooker.configuration.data, expand)
class CommandsAsync:
"""
A class of asynchronous commands
These functions communicate via generated events.
Any function that requires metadata parsing should be here.
"""
def buildFile(self, command, params):
"""
Build a single specified .bb file
"""
bfile = params[0]
task = params[1]
command.cooker.buildFile(bfile, task)
def buildTargets(self, command, params):
"""
Build a set of targets
"""
pkgs_to_build = params[0]
command.cooker.buildTargets(pkgs_to_build)
def generateDepTreeEvent(self, command, params):
"""
Generate an event containing the dependency information
"""
pkgs_to_build = params[0]
command.cooker.generateDepTreeEvent(pkgs_to_build)
command.finishAsyncCommand()
def generateDotGraph(self, command, params):
"""
Dump dependency information to disk as .dot files
"""
pkgs_to_build = params[0]
command.cooker.generateDotGraphFiles(pkgs_to_build)
command.finishAsyncCommand()
def showVersions(self, command, params):
"""
Show the currently selected versions
"""
command.cooker.showVersions()
command.finishAsyncCommand()
def showEnvironment(self, command, params):
"""
Print the environment
"""
bfile = params[0]
pkg = params[1]
command.cooker.showEnvironment(bfile, pkg)
command.finishAsyncCommand()
def parseFiles(self, command, params):
"""
Parse the .bb files
"""
command.cooker.updateCache()
command.finishAsyncCommand()
#
# Events
#
class CookerCommandCompleted(bb.event.Event):
"""
Cooker command completed
"""
def __init__(self, data):
bb.event.Event.__init__(self, data)
class CookerCommandFailed(bb.event.Event):
"""
Cooker command completed
"""
def __init__(self, data, error):
bb.event.Event.__init__(self, data)
self.error = error
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