test: convert rm -rf && mkdir -p into %empty-directory

This converts the instances of the pattern for which we have a proper
substitution in lit.  This will make it easier to replace it
appropriately with Windows equivalents.

test/refactoring/ExtractFunction/basic.swift

@@ -5,7 +5,7 @@ func foo() -> Int{
   return aaa
 }
 
-// RUN: rm -rf %t.result && mkdir -p %t.result
+// RUN: %empty-directory(%t.result)
 // RUN: %refactor -extract-function -source-filename %s -pos=2:1 -end-pos=5:13 >> %t.result/L2-5.swift
 // RUN: diff -u %S/Outputs/basic/L2-5.swift.expected %t.result/L2-5.swift
 // RUN: %refactor -extract-function -source-filename %s -pos=3:1 -end-pos=5:13 >> %t.result/L3-5.swift

test/refactoring/ExtractFunction/extract_attributes.swift

@@ -8,6 +8,6 @@ public func foo() -> Int{
 }
 }
 
-// RUN: rm -rf %t.result && mkdir -p %t.result
+// RUN: %empty-directory(%t.result)
 // RUN: %refactor -extract-function -source-filename %s -pos=5:1 -end-pos=6:26 >> %t.result/L5-6.swift
 // RUN: diff -u %S/Outputs/extract_attributes/L5-6.swift.expected %t.result/L5-6.swift

test/refactoring/ExtractFunction/extract_from_accessor.swift

@@ -9,7 +9,7 @@ class C {
   }
 }
 
-// RUN: rm -rf %t.result && mkdir -p %t.result
+// RUN: %empty-directory(%t.result)
 // RUN: %refactor -extract-function -source-filename %s -pos=3:13 -end-pos=3:18 >> %t.result/ImplicitGetter.swift
 // RUN: diff -u %S/Outputs/extract_from_accessor/ImplicitGetter.swift.expected %t.result/ImplicitGetter.swift
 

test/refactoring/ExtractFunction/extract_init.swift

@@ -7,6 +7,6 @@ class C {
   }
 }
 
-// RUN: rm -rf %t.result && mkdir -p %t.result
+// RUN: %empty-directory(%t.result)
 // RUN: %refactor -extract-function -source-filename %s -pos=5:1 -end-pos=6:15 >> %t.result/L5-6.swift
 // RUN: diff -u %S/Outputs/extract_init/L5-6.swift.expected %t.result/L5-6.swift

test/refactoring/ExtractFunction/extract_local.swift

@@ -12,6 +12,6 @@ func returnFifteen() -> Int {
   return y
 }
 
-// RUN: rm -rf %t.result && mkdir -p %t.result
+// RUN: %empty-directory(%t.result)
 // RUN: %refactor -extract-function -source-filename %s -pos=5:1 -end-pos=9:6 >> %t.result/AvoidFilePrivate.swift
 // RUN: diff -u %S/Outputs/extract_local/AvoidFilePrivate.swift.expected %t.result/AvoidFilePrivate.swift

test/refactoring/ExtractFunction/extract_subscript.swift

@@ -10,7 +10,7 @@ class A {
   }
 }
 
-// RUN: rm -rf %t.result && mkdir -p %t.result
+// RUN: %empty-directory(%t.result)
 // RUN: %refactor -extract-function -source-filename %s -pos=5:1 -end-pos=5:15 >> %t.result/FromGetter.swift
 // RUN: diff -u %S/Outputs/extract_subscript/FromGetter.swift.expected %t.result/FromGetter.swift
 // RUN: %refactor -extract-function -source-filename %s -pos=8:1 -end-pos=8:19 >> %t.result/FromSetter.swift

test/refactoring/ExtractFunction/extract_sugar.swift

@@ -5,6 +5,6 @@ func foo(_ a : inout [Int]) -> [Int] {
   return a
 }
 
-// RUN: rm -rf %t.result && mkdir -p %t.result
+// RUN: %empty-directory(%t.result)
 // RUN: %refactor -extract-function -source-filename %s -pos=2:1 -end-pos=5:11 >> %t.result/L2-5.swift
 // RUN: diff -u %S/Outputs/extract_sugar/L2-5.swift.expected %t.result/L2-5.swift

test/refactoring/ExtractFunction/extract_switch.swift

@@ -23,9 +23,9 @@ func foo2(_ e : MyEnum) -> Int {
   }
 }
 
-// RUN: rm -rf %t.result && mkdir -p %t.result
+// RUN: %empty-directory(%t.result)
 // RUN: %refactor -extract-function -source-filename %s -pos=8:1 -end-pos=15:4 >> %t.result/Void.swift
 // RUN: diff -u %S/Outputs/extract_switch/Void.swift.expected %t.result/Void.swift
-// RUN: rm -rf %t.result && mkdir -p %t.result
+// RUN: %empty-directory(%t.result)
 // RUN: %refactor -extract-function -source-filename %s -pos=16:1 -end-pos=23:4 >> %t.result/Int.swift
 // RUN: diff -u %S/Outputs/extract_switch/Int.swift.expected %t.result/Int.swift

test/refactoring/ExtractFunction/extract_with_comments.swift

@@ -11,6 +11,6 @@ public func foo() -> Int{
 }
 }
 
-// RUN: rm -rf %t.result && mkdir -p %t.result
+// RUN: %empty-directory(%t.result)
 // RUN: %refactor -extract-function -source-filename %s -pos=6:1 -end-pos=7:26 >> %t.result/L6-7.swift
 // RUN: diff -u %S/Outputs/extract_with_comments/L6-7.swift.expected %t.result/L6-7.swift

test/refactoring/ExtractFunction/name_correction.swift

@@ -12,6 +12,6 @@ public func new_name2() {}
 public func new_name3() {}
 }
 
-// RUN: rm -rf %t.result && mkdir -p %t.result
+// RUN: %empty-directory(%t.result)
 // RUN: %refactor -extract-function -source-filename %s -pos=5:1 -end-pos=6:26 >> %t.result/L5-6.swift
 // RUN: diff -u %S/Outputs/name_correction/L5-6.swift.expected %t.result/L5-6.swift

test/refactoring/ExtractFunction/static.swift

@@ -12,7 +12,7 @@ class C {
   }
 }
 
-// RUN: rm -rf %t.result && mkdir -p %t.result
+// RUN: %empty-directory(%t.result)
 // RUN: %refactor -extract-function -source-filename %s -pos=3:1 -end-pos=5:13 >> %t.result/L3-5.swift
 // RUN: diff -u %S/Outputs/static/L3-5.swift.expected %t.result/L3-5.swift
 // RUN: %refactor -extract-function -source-filename %s -pos=9:1 -end-pos=11:13 >> %t.result/L9-11.swift

test/refactoring/ExtractFunction/throw_errors.swift

@@ -17,7 +17,7 @@ func foo2() throws {
   }
 }
 
-// RUN: rm -rf %t.result && mkdir -p %t.result
+// RUN: %empty-directory(%t.result)
 // RUN: %refactor -extract-function -source-filename %s -pos=8:1 -end-pos=8:13 >> %t.result/L8-8.swift
 // RUN: diff -u %S/Outputs/throw_errors/L8-8.swift.expected %t.result/L8-8.swift
 // RUN: %refactor -extract-function -source-filename %s -pos=9:1 -end-pos=9:14 >> %t.result/L9-9.swift

test/refactoring/ExtractFunction/throw_errors2.swift

@@ -12,6 +12,6 @@ struct RefactorExtractProblem {
   }
 }
 
-// RUN: rm -rf %t.result && mkdir -p %t.result
+// RUN: %empty-directory(%t.result)
 // RUN: %refactor -extract-function -source-filename %s -pos=7:1 -end-pos=11:6 >> %t.result/L7-11.swift
 // RUN: diff -u %S/Outputs/throw_errors2/L7-11.swift.expected %t.result/L7-11.swift