Adding check on stanford license for information in __init__ and to stop processing

in insarApp.py and isceApp.py because of their dependencies on licensed code files.

__init__.py

@@ -1,18 +1,18 @@
 #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 # Copyright 2010 California Institute of Technology. ALL RIGHTS RESERVED.
-# 
+#
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
-# 
+#
 # http://www.apache.org/licenses/LICENSE-2.0
-# 
+#
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-# 
+#
 # United States Government Sponsorship acknowledged. This software is subject to
 # U.S. export control laws and regulations and has been classified as 'EAR99 NLR'
 # (No [Export] License Required except when exporting to an embargoed country,
@@ -47,3 +47,14 @@ try:
 except KeyError:
     print('Using default ISCE Path: %s'%(isce_path))
     os.environ['ISCE_HOME'] = isce_path
+
+try:
+    from . license import stanford_license
+except:
+    print("This is the Open Source version of ISCE.")
+    print("Some of the workflows depend on a separate licensed package.")
+    print("To obtain the licensed package, please make a request for ISCE")
+    print("through the website: https://download.jpl.nasa.gov/ops/request/index.cfm.")
+    print("Alternatively, if you are a member, or can become a member of WinSAR")
+    print("you may be able to obtain access to a version of the licensed sofware at")
+    print("https://winsar.unavco.org/software/isce")

applications/insarApp.py

@@ -2,19 +2,19 @@
 
 #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 # Copyright 2012 California Institute of Technology. ALL RIGHTS RESERVED.
-# 
+#
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
-# 
+#
 # http://www.apache.org/licenses/LICENSE-2.0
-# 
+#
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-# 
+#
 # United States Government Sponsorship acknowledged. This software is subject to
 # U.S. export control laws and regulations and has been classified as 'EAR99 NLR'
 # (No [Export] License Required except when exporting to an embargoed country,
@@ -1197,11 +1197,18 @@ class Insar(_InsarBase):
 
 
 if __name__ == "__main__":
-    #make an instance of Insar class named 'insarApp'
+    if not isce.stanford_license:
-    insar = Insar(name="insarApp")
+        print("This workflow requires the Stanford licensed code elemnts.")
-    #configure the insar application
+        print("Unable to find the license information in the isce.stanford_license file.")
-    insar.configure()
+        print("Please either obtain a stanford license and follow the instructions to")
-    #invoke the base class run method, which returns status
+        print("install the stanford code elements or else choose a different workflow.")
-    status = insar.run()
+        raise SystemExit(0)
-    #inform Python of the status of the run to return to the shell
+    else:
-    raise SystemExit(status)
+        #make an instance of Insar class named 'insarApp'
+        insar = Insar(name="insarApp")
+        #configure the insar application
+        insar.configure()
+        #invoke the base class run method, which returns status
+        status = insar.run()
+        #inform Python of the status of the run to return to the shell
+        raise SystemExit(status)

applications/isceApp.py

@@ -3,19 +3,19 @@
 
 #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 # Copyright 2013 California Institute of Technology. ALL RIGHTS RESERVED.
-# 
+#
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
-# 
+#
 # http://www.apache.org/licenses/LICENSE-2.0
-# 
+#
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-# 
+#
 # United States Government Sponsorship acknowledged. This software is subject to
 # U.S. export control laws and regulations and has been classified as 'EAR99 NLR'
 # (No [Export] License Required except when exporting to an embargoed country,
@@ -1786,11 +1786,18 @@ class IsceApp(Application, FrameMixin):
 
 
 if __name__ == "__main__":
-    #create the isce object
+    if not isce.stanford_license:
-    isceapp = IsceApp(name='isceApp')
+        print("This workflow requires the Stanford licensed code elemnts.")
-    #configure the isceapp object
+        print("Unable to find the license information in the isce.stanford_license file.")
-    isceapp.configure()
+        print("Please either obtain a stanford license and follow the instructions to")
-    #invoke the Application base class run method, which returns status
+        print("install the stanford code elements or else choose a different workflow.")
-    status = isceapp.run()
+        raise SystemExit(0)
-    #inform Python of the status of the run to return to the shell
+    else:
-    raise SystemExit(status)
+        #create the isce object
+        isceapp = IsceApp(name='isceApp')
+        #configure the isceapp object
+        isceapp.configure()
+        #invoke the Application base class run method, which returns status
+        status = isceapp.run()
+        #inform Python of the status of the run to return to the shell
+        raise SystemExit(status)