Allow custom shell commands to specify weak dependencies (bug 5997 pa…

…rt 7, r=ds).

ambuild2/frontend/amb2/gen.py

@@ -595,7 +595,14 @@ def addSymlink(self, context, source, output_path):
   def addFolder(self, context, folder):
     return self.generateFolder(context.localFolder, folder)
 
-  def addShellCommand(self, context, inputs, argv, outputs, folder=-1, dep_type=None):
+  def addShellCommand(self,
+                      context,
+                      inputs,
+                      argv,
+                      outputs,
+                      folder=-1,
+                      dep_type=None,
+                      weak_inputs=[]):
     if folder is -1:
       folder = context.localFolder
 
@@ -620,7 +627,8 @@ def addShellCommand(self, context, inputs, argv, outputs, folder=-1, dep_type=No
       folder = folder,
       data = data,
       inputs = inputs,
-      outputs = outputs
+      outputs = outputs,
+      weak_inputs = weak_inputs
     )
 
   def addConfigureFile(self, context, path):

ambuild2/frontend/base_gen.py

@@ -122,8 +122,15 @@ def AddFolder(self, folder):
   def AddCopy(self, source, output_path):
     return self.generator.addCopy(self, source, output_path)
 
-  def AddCommand(self, inputs, argv, outputs, dep_type=None):
-    return self.generator.addShellCommand(self, inputs, argv, outputs, dep_type=dep_type)
+  def AddCommand(self, inputs, argv, outputs, dep_type=None, weak_inputs=[]):
+    return self.generator.addShellCommand(
+      self,
+      inputs,
+      argv,
+      outputs,
+      dep_type = dep_type,
+      weak_inputs = weak_inputs
+    )
 
   def AddConfigureFile(self, path):
     return self.generator.addConfigureFile(self, path)
@@ -236,7 +243,7 @@ def addFolder(self, context, folder):
   def addCopy(self, context, source, output_path):
     raise Exception('Must be implemented!')
 
-  def addShellCommand(self, context, inputs, argv, outputs, dep_type=None):
+  def addShellCommand(self, context, inputs, argv, outputs, dep_type=None, weak_inputs=[]):
     raise Exception('Must be implemented!')
 
   def addConfigureFile(self, context, path):