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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.event
import bb.cooker
import bb.data
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 synchronous 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)
self.cooker.server.register_idle_function(self.cooker.runCommands, self.cooker)
return True
except:
import traceback
return traceback.format_exc()
def runAsyncCommand(self):
try:
if self.currentAsyncCommand is not None:
(command, options) = self.currentAsyncCommand
commandmethod = getattr(CommandsAsync, command)
needcache = getattr( commandmethod, "needcache" )
if (needcache and self.cooker.state in
(bb.cooker.state.initial, bb.cooker.state.parsing)):
self.cooker.updateCache()
return True
else:
commandmethod(self.cmds_async, self, options)
return False
else:
return False
except KeyboardInterrupt as exc:
self.finishAsyncCommand("Interrupted")
return False
except SystemExit as exc:
arg = exc.args[0]
if isinstance(arg, basestring):
self.finishAsyncCommand(arg)
else:
self.finishAsyncCommand("Exited with %s" % arg)
return False
except Exception:
import traceback
self.finishAsyncCommand(traceback.format_exc())
return False
def finishAsyncCommand(self, error = None):
if error:
bb.event.fire(CookerCommandFailed(error), self.cooker.configuration.event_data)
else:
bb.event.fire(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.shutdown()
def stateStop(self, command, params):
"""
Stop the cooker
"""
command.cooker.stop()
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)
def setVariable(self, command, params):
"""
Set the value of variable in configuration.data
"""
varname = params[0]
value = params[1]
bb.data.setVar(varname, value, command.cooker.configuration.data)
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)
buildFile.needcache = False
def buildTargets(self, command, params):
"""
Build a set of targets
"""
pkgs_to_build = params[0]
task = params[1]
command.cooker.buildTargets(pkgs_to_build, task)
buildTargets.needcache = True
def generateDepTreeEvent(self, command, params):
"""
Generate an event containing the dependency information
"""
pkgs_to_build = params[0]
task = params[1]
command.cooker.generateDepTreeEvent(pkgs_to_build, task)
command.finishAsyncCommand()
generateDepTreeEvent.needcache = True
def generateDotGraph(self, command, params):
"""
Dump dependency information to disk as .dot files
"""
pkgs_to_build = params[0]
task = params[1]
command.cooker.generateDotGraphFiles(pkgs_to_build, task)
command.finishAsyncCommand()
generateDotGraph.needcache = True
def showVersions(self, command, params):
"""
Show the currently selected versions
"""
command.cooker.showVersions()
command.finishAsyncCommand()
showVersions.needcache = True
def showEnvironmentTarget(self, command, params):
"""
Print the environment of a target recipe
(needs the cache to work out which recipe to use)
"""
pkg = params[0]
command.cooker.showEnvironment(None, pkg)
command.finishAsyncCommand()
showEnvironmentTarget.needcache = True
def showEnvironment(self, command, params):
"""
Print the standard environment
or if specified the environment for a specified recipe
"""
bfile = params[0]
command.cooker.showEnvironment(bfile)
command.finishAsyncCommand()
showEnvironment.needcache = False
def parseFiles(self, command, params):
"""
Parse the .bb files
"""
command.cooker.updateCache()
command.finishAsyncCommand()
parseFiles.needcache = True
def compareRevisions(self, command, params):
"""
Parse the .bb files
"""
command.cooker.compareRevisions()
command.finishAsyncCommand()
compareRevisions.needcache = True
#
# Events
#
class CookerCommandCompleted(bb.event.Event):
"""
Cooker command completed
"""
def __init__(self):
bb.event.Event.__init__(self)
class CookerCommandFailed(bb.event.Event):
"""
Cooker command completed
"""
def __init__(self, error):
bb.event.Event.__init__(self)
self.error = error
class CookerCommandSetExitCode(bb.event.Event):
"""
Set the exit code for a cooker command
"""
def __init__(self, exitcode):
bb.event.Event.__init__(self)
self.exitcode = int(exitcode)
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