jp: added jp/debug commands:

jp/debug hierarchy contain commands useful for developping and debugging.
    first commands are jp/debug/bridge:
        - "method" allows to call a bridge method, args are parsed as python arguments (using eval).
        - "signal" do the same to send a signal from backend, using the new debug plugin.

frontends/src/jp/cmd_debug.py

@@ -0,0 +1,107 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# jp: a SàT command line tool
+# Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.org)
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# 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 Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+import base
+from sat.core.i18n import _
+from sat_frontends.jp.constants import Const as C
+import json
+
+__commands__ = ["Debug"]
+
+
+class BridgeCommon(object):
+
+    def evalArgs(self):
+        if self.args.arg:
+            try:
+                return eval(u",".join(self.args.arg))
+            except SyntaxError as e:
+                self.disp(u"Can't evaluate arguments: {mess}\n{text}\n{offset}^".format(
+                    mess=e,
+                    text=e.text,
+                    offset=u" "*(e.offset-1)
+                    ), error=True)
+                self.host.quit(C.EXIT_BAD_ARG)
+        else:
+            return []
+
+
+class Method(base.CommandBase, BridgeCommon):
+
+    def __init__(self, host):
+        base.CommandBase.__init__(self, host, 'method', help=_(u'call a bridge method'))
+        BridgeCommon.__init__(self)
+        self.need_loop=True
+
+    def add_parser_options(self):
+        self.parser.add_argument("method", type=str, help=_(u"name of the method to execute"))
+        self.parser.add_argument("arg", nargs="*", help=_(u"argument of the method"))
+
+    def method_cb(self, ret):
+        self.disp(unicode(ret))
+        self.host.quit()
+
+    def method_eb(self, failure):
+        self.disp(_(u"Error while executing {}: {}".format(self.args.method, failure)), error=True)
+        self.host.quit(C.EXIT_ERROR)
+
+    def start(self):
+        method = getattr(self.host.bridge, self.args.method)
+        args = self.evalArgs()
+        try:
+            method(*self.args.arg, profile=self.profile, callback=self.method_cb, errback=self.method_eb)
+        except TypeError:
+            # maybe the method doesn't need a profile ?
+            try:
+                method(*args, callback=self.method_cb, errback=self.method_eb)
+            except TypeError:
+                self.method_eb(_(u"bad arguments"))
+
+
+class Signal(base.CommandBase, BridgeCommon):
+
+    def __init__(self, host):
+        base.CommandBase.__init__(self, host, 'signal', help=_(u'send a fake signal from backend'))
+        BridgeCommon.__init__(self)
+
+    def add_parser_options(self):
+        self.parser.add_argument("signal", type=str, help=_(u"name of the signal to send"))
+        self.parser.add_argument("arg", nargs="*", help=_(u"argument of the signal"))
+
+    def start(self):
+        args = self.evalArgs()
+        json_args = json.dumps(args)
+        # XXX: we use self.args.profile and not self.profile
+        #      because we want the raw profile_key (so plugin handle C.PROF_KEY_NONE)
+        self.host.bridge.debugFakeSignal(self.args.signal, json_args, self.args.profile)
+
+
+class Bridge(base.CommandBase):
+    subcommands = (Method, Signal)
+
+    def __init__(self, host):
+        super(Bridge, self).__init__(host, 'bridge', use_profile=False, help=_('bridge s(t)imulation'))
+
+
+class Debug(base.CommandBase):
+    subcommands = (Bridge,)
+
+    def __init__(self, host):
+        super(Debug, self).__init__(host, 'debug', use_profile=False, help=_('debugging tools'))