Put temporary stuff in a scratch directory.

builder.py

@@ -67,7 +67,7 @@ class Builder():
             raise interpreter.InvalidCode('Builder file is empty.')
         assert(isinstance(code, str))
         env = environment.Environment(self.source_dir, self.build_dir)
-        intr = interpreter.Interpreter(code)
+        intr = interpreter.Interpreter(code, env.get_scratch_dir())
         g = shellgenerator.ShellGenerator(intr, env)
         g.generate()
 

environment.py

@@ -108,6 +108,8 @@ class Environment():
     def __init__(self, source_dir, build_dir):
         self.source_dir = source_dir
         self.build_dir = build_dir
+        self.scratch_dir = os.path.join(build_dir, 'builder-private')
+        os.makedirs(self.scratch_dir, exist_ok=True)
 
         self.default_c = ['cc']
         self.default_cxx = ['c++']
@@ -124,6 +126,9 @@ class Environment():
         if evar in os.environ:
             return os.environ[evar].split()
         return self.default_c
+    
+    def get_scratch_dir(self):
+        return self.scratch_dir
 
     def get_cxx_compiler(self):
         evar = 'CXX'

interpreter.py

@@ -66,14 +66,15 @@ class Executable(BuildTarget):
 
 class Interpreter():
     
-    def __init__(self, code):
+    def __init__(self, code, scratch_dir):
         self.ast = parser.build_ast(code)
         self.sanity_check_ast()
         self.project = None
         self.compilers = []
         self.executables = {}
         self.variables = {}
-        
+        self.scratch_dir = scratch_dir
+
     def get_project(self):
         return self.project
 
@@ -136,7 +137,9 @@ class Interpreter():
             raise InvalidCode('Function language() can only be called once (line %d).' % node.lineno())
         lang = args[0]
         if lang.lower() == 'c':
-            self.compilers.append(environment.detect_c_compiler('gcc'))
+            comp = environment.detect_c_compiler('gcc')
+            comp.sanity_check(self.scratch_dir)
+            self.compilers.append(comp)
         else:
             raise InvalidCode('Tried to use unknown language "%s".' % lang)
 
@@ -231,5 +234,5 @@ if __name__ == '__main__':
     dep = find_dep('gtk+-3.0')
     prog.add_dep(dep)
     """
-    i = Interpreter(code)
+    i = Interpreter(code, '.')
     i.run()

test cases/1 trivial/builder.txt

@@ -1,2 +1,3 @@
 project('trivial test')
+language('c')