Add the command module (needs rewriting)

1 files changed, 183 insertions, 0 deletions

diff --git a/lib/bb/command.py b/lib/bb/command.py
new file mode 100644
index 000000000..7597e439d
--- /dev/null
+++ b/lib/bb/command.py
@@ -0,0 +1,183 @@
+"""
+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 'online' of 'offline' in nature. 
+Offline commands return data to the client in the form of events.
+Online 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
+
+offline_cmds = {}
+online_cmds = {}
+
+class Command:
+    """
+    A queue of 'offline' commands for bitbake
+    """
+    def __init__(self, cooker):
+
+        self.cooker = cooker
+        self.cmds_online = CommandsOnline()
+        self.cmds_offline = CommandsOffline()
+
+        # FIXME Add lock for this
+        self.currentOfflineCommand = None
+
+        for attr in CommandsOnline.__dict__:
+            command = attr[:].lower()
+            method = getattr(CommandsOnline, attr)
+            online_cmds[command] = (method)
+
+        for attr in CommandsOffline.__dict__:
+            command = attr[:].lower()
+            method = getattr(CommandsOffline, attr)
+            offline_cmds[command] = (method)
+
+    def runCommand(self, commandline):
+        try:
+            command = commandline.pop(0)
+            if command in CommandsOnline.__dict__:
+                # Can run online commands straight away            
+                return getattr(CommandsOnline, command)(self.cmds_online, self, commandline)
+            if self.currentOfflineCommand is not None:
+                return "Busy (%s in progress)" % self.currentOfflineCommand[0]
+            if command not in CommandsOffline.__dict__:
+                return "No such command"
+            self.currentOfflineCommand = (command, commandline)
+            return True
+        except:
+            import traceback
+            return traceback.format_exc()
+
+    def runOfflineCommand(self):
+        try:
+            if self.currentOfflineCommand is not None:
+                (command, options) = self.currentOfflineCommand
+                getattr(CommandsOffline, command)(self.cmds_offline, self, options)
+        except:
+            import traceback
+            self.finishOfflineCommand(traceback.format_exc())
+
+    def finishOfflineCommand(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.currentOfflineCommand = None
+
+
+class CommandsOnline:
+    """
+    A class of online commands
+    These should run quickly so as not to hurt interactive performance.
+    These must not influence any running offline 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 showEnvironment(self, command, params):
+        """
+        Print the environment
+        """
+        bfile = params[0]
+
+        command.cooker.showEnvironment(bfile)
+
+        bb.event.fire(bb.command.CookerCommandCompleted(command.cooker.configuration.event_data))
+
+class CommandsOffline:
+    """
+    A class of offline 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)
+        command.finishOfflineCommand()
+
+    def buildTargets(self, command, params):
+        """
+        Build a set of targets
+        """
+        pkgs_to_build = params[0]
+
+        command.cooker.buildTargets(pkgs_to_build)
+
+    def generateDotGraph(self, command, params):
+        """
+        Dump dependency information to disk as .dot files
+        """
+        pkgs_to_build = params[0]
+
+        command.cooker.generateDotGraph(pkgs_to_build)
+        command.finishOfflineCommand()
+
+    def showVersions(self, command, params):
+        """
+        Show the currently selected versions
+        """
+        command.cooker.showVersions()
+        command.finishOfflineCommand()
+
+
+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