Possibly-silly function composition for patching

inclement · inclement · commit 30cbb96025b6 · 2016-01-10T21:18:17.000Z
diff --git a/pythonforandroid/patching.py b/pythonforandroid/patching.py
@@ -1,22 +1,35 @@
 from os import uname
 
+class ComposableFunction(object):
+    def __init__(self, function):
+        self.func = function
+        
+    def __call__(self, *args, **kwargs):
+        return self.func(*args, **kwargs)
+
+    def __and__(self, f):
+        return ComposableFunction(lambda *args, **kwargs: self(*args, **kwargs) and f(*args, **kwargs))
+
+    def __or__(self, f):
+        return ComposableFunction(lambda *args, **kwargs: self(*args, **kwargs) or f(*args, **kwargs))
+
 
 def check_all(*callables):
     def check(**kwargs):
         return all(c(**kwargs) for c in callables)
-    return check
+    return ComposableFunction(check)
 
 
 def check_any(*callables):
     def check(**kwargs):
         return any(c(**kwargs) for c in callables)
-    return check
+    return ComposableFunction(check)
 
 
 def is_platform(platform):
     def is_x(**kwargs):
         return uname()[0] == platform
-    return is_x
+    return ComposableFunction(is_x)
 
 is_linux = is_platform('Linux')
 is_darwin = is_platform('Darwin')
@@ -25,43 +38,43 @@ def is_x(**kwargs):
 def is_arch(xarch):
     def is_x(arch, **kwargs):
         return arch.arch == xarch
-    return is_x
+    return ComposableFunction(is_x)
 
 
 def is_api_gt(apiver):
     def is_x(recipe, **kwargs):
         return recipe.ctx.android_api > apiver
-    return is_x
+    return ComposableFunction(is_x)
 
 
 def is_api_gte(apiver):
     def is_x(recipe, **kwargs):
         return recipe.ctx.android_api >= apiver
-    return is_x
+    return ComposableFunction(is_x)
 
 
 def is_api_lt(apiver):
     def is_x(recipe, **kwargs):
         return recipe.ctx.android_api < apiver
-    return is_x
+    return ComposableFunction(is_x)
 
 
 def is_api_lte(apiver):
     def is_x(recipe, **kwargs):
         return recipe.ctx.android_api <= apiver
-    return is_x
+    return ComposableFunction(is_x)
 
 
 def is_api(apiver):
     def is_x(recipe, **kwargs):
         return recipe.ctx.android_api == apiver
-    return is_x
+    return ComposableFunction(is_x)
 
 
 def will_build(recipe_name):
     def will(recipe, **kwargs):
         return recipe_name in recipe.ctx.recipe_build_order
-    return will
+    return ComposableFunction(will)
 
 
 def is_ndk(ndk):
