[processing] additional mechanism to add scripts from 3rd party plugin

python/plugins/processing/ProcessingPlugin.py

@@ -55,11 +55,9 @@ class ProcessingPlugin:
 
     def __init__(self, iface):
         self.iface = iface
-
-    def initGui(self):
-
         Processing.initialize()
 
+    def initGui(self):
         self.commander = None
         self.toolbox = ProcessingToolbox()
         self.iface.addDockWidget(Qt.RightDockWidgetArea, self.toolbox)

python/plugins/processing/algs/examplescripts/ProcessingExampleScriptsPlugin.py

@@ -0,0 +1,38 @@
+# -*- coding: utf-8 -*-
+
+"""
+***************************************************************************
+    __init__.py
+    ---------------------
+    Date                 : May 2016
+    Copyright            : (C) 2016 by Victor Olaya
+    Email                : volayaf at gmail dot com
+***************************************************************************
+*                                                                         *
+*   This program is free software; you can redistribute it and/or modify  *
+*   it under the terms of the GNU General Public License as published by  *
+*   the Free Software Foundation; either version 2 of the License, or     *
+*   (at your option) any later version.                                   *
+*                                                                         *
+***************************************************************************
+"""
+
+__author__ = 'Victor Olaya'
+__date__ = 'May 2016'
+__copyright__ = '(C) 2016, Victor Olaya'
+
+# This will get replaced with a git SHA1 when you do a git archive
+
+__revision__ = '$Format:%H$'
+
+import os
+
+from processing.core.Processing import Processing
+
+class ProcessingExampleScriptsPlugin:
+
+    def initGui(self):
+        Processing.addScripts(self, os.path.dirname(__file__))
+            
+    def unload(self):
+        pass

python/plugins/processing/algs/examplescripts/__init__.py

@@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+
+"""
+***************************************************************************
+    __init__.py
+    ---------------------
+    Date                 : July 2013
+    Copyright            : (C) 2013 by Victor Olaya
+    Email                : volayaf at gmail dot com
+***************************************************************************
+*                                                                         *
+*   This program is free software; you can redistribute it and/or modify  *
+*   it under the terms of the GNU General Public License as published by  *
+*   the Free Software Foundation; either version 2 of the License, or     *
+*   (at your option) any later version.                                   *
+*                                                                         *
+***************************************************************************
+"""
+from .ProcessingExampleScriptsPlugin import ProcessingExampleScriptsPlugin
+
+__author__ = 'Victor Olaya'
+__date__ = 'July 2013'
+__copyright__ = '(C) 2013, Victor Olaya'
+
+# This will get replaced with a git SHA1 when you do a git archive
+
+__revision__ = '$Format:%H$'
+
+
+def classFactory(iface):
+    return ProcessingExampleScriptsPlugin()

python/plugins/processing/algs/examplescripts/examplescript.py

@@ -0,0 +1,3 @@
+##text=string
+
+print text

python/plugins/processing/algs/examplescripts/metadata.txt

@@ -0,0 +1,18 @@
+[general]
+name=Processing Example Scripts
+description=An example plugin that adds algorithms to Processing as plugins
+category=Analysis
+version=1.0
+qgisMinimumVersion=2.0
+
+author=Victor Olaya
+email=volayaf@gmail.com
+
+tags=analysis,processing
+
+homepage=
+tracker=
+repository=
+
+experimental=False
+deprecated=False

python/plugins/processing/algs/qgis/QGISAlgorithmProvider.py

@@ -222,6 +222,8 @@ class QGISAlgorithmProvider(AlgorithmProvider):
             from .ExecuteSQL import ExecuteSQL
             self.alglist.extend([ExecuteSQL()])
 
+        self.externalAlgs = [] #to store algs added by 3rd party plugins as scripts
+        
         folder = os.path.join(os.path.dirname(__file__), 'scripts')
         scripts = ScriptUtils.loadFromFolder(folder)
         for script in scripts:
@@ -246,7 +248,7 @@ class QGISAlgorithmProvider(AlgorithmProvider):
         return self._icon
 
     def _loadAlgorithms(self):
-        self.algs = self.alglist
+        self.algs = list(self.alglist) + self.externalAlgs
 
     def supportsNonFileBasedOutput(self):
         return True

python/plugins/processing/core/Processing.py

@@ -17,6 +17,7 @@
 ***************************************************************************
 """
 
+
 __author__ = 'Victor Olaya'
 __date__ = 'August 2012'
 __copyright__ = '(C) 2012, Victor Olaya'
@@ -26,6 +27,7 @@ __copyright__ = '(C) 2012, Victor Olaya'
 __revision__ = '$Format:%H$'
 
 import sys
+import os
 import traceback
 
 from qgis.PyQt.QtCore import Qt, QCoreApplication, QObject, pyqtSignal
@@ -37,6 +39,9 @@ from qgis.core import QgsMessageLog
 
 import processing
 from processing.core.AlgorithmProvider import AlgorithmProvider
+from processing.script.ScriptUtils import ScriptUtils
+from processing.gui import AlgorithmClassification
+from processing.modeler.ModelerUtils import ModelerUtils
 from processing.core.ProcessingConfig import ProcessingConfig
 from processing.core.GeoAlgorithm import GeoAlgorithm
 from processing.core.ProcessingLog import ProcessingLog
@@ -73,7 +78,7 @@ class Processing:
     contextMenuActions = []
 
     @staticmethod
-    def addProvider(provider, update=True):
+    def addProvider(provider, updateList=True):
         """Use this method to add algorithms from external providers.
         """
 
@@ -122,6 +127,8 @@ class Processing:
 
     @staticmethod
     def initialize():
+        if Processing.providers:
+            return
         # Add the basic providers
         for c in AlgorithmProvider.__subclasses__():
             Processing.addProvider(c())
@@ -129,6 +136,23 @@ class Processing:
         ProcessingConfig.initialize()
         ProcessingConfig.readSettings()
         RenderingStyles.loadStyles()
+        
+    @staticmethod        
+    def addScripts(folder):
+        Processing.initialize()
+        provider = Processing.getProviderFromName("qgis")
+        scripts = ScriptUtils.loadFromFolder(folder)
+        print scripts
+        for script in scripts:
+            script.allowEdit = False
+            script._icon = provider._icon
+            script.provider = provider
+        provider.externalAlgs.extend(scripts)     
+        Processing.reloadProvider("qgis")
+        
+    @staticmethod 
+    def removeScripts(folder):
+        pass
 
     @staticmethod
     def updateAlgsList():