1 files changed, 117 insertions, 0 deletions
diff --git a/meson/mesonbuild/ast/postprocess.py b/meson/mesonbuild/ast/postprocess.py
new file mode 100644
index 000000000..6d808be57
--- /dev/null
+++ b/meson/mesonbuild/ast/postprocess.py
@@ -0,0 +1,117 @@
+# Copyright 2019 The Meson development team
+
+# 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.
+
+# This class contains the basic functionality needed to run any interpreter
+# or an interpreter-based tool
+
+from . import AstVisitor
+from .. import mparser
+import typing as T
+
+class AstIndentationGenerator(AstVisitor):
+    def __init__(self) -> None:
+        self.level = 0
+
+    def visit_default_func(self, node: mparser.BaseNode) -> None:
+        # Store the current level in the node
+        node.level = self.level
+
+    def visit_ArrayNode(self, node: mparser.ArrayNode) -> None:
+        self.visit_default_func(node)
+        self.level += 1
+        node.args.accept(self)
+        self.level -= 1
+
+    def visit_DictNode(self, node: mparser.DictNode) -> None:
+        self.visit_default_func(node)
+        self.level += 1
+        node.args.accept(self)
+        self.level -= 1
+
+    def visit_MethodNode(self, node: mparser.MethodNode) -> None:
+        self.visit_default_func(node)
+        node.source_object.accept(self)
+        self.level += 1
+        node.args.accept(self)
+        self.level -= 1
+
+    def visit_FunctionNode(self, node: mparser.FunctionNode) -> None:
+        self.visit_default_func(node)
+        self.level += 1
+        node.args.accept(self)
+        self.level -= 1
+
+    def visit_ForeachClauseNode(self, node: mparser.ForeachClauseNode) -> None:
+        self.visit_default_func(node)
+        self.level += 1
+        node.items.accept(self)
+        node.block.accept(self)
+        self.level -= 1
+
+    def visit_IfClauseNode(self, node: mparser.IfClauseNode) -> None:
+        self.visit_default_func(node)
+        for i in node.ifs:
+            i.accept(self)
+        if node.elseblock:
+            self.level += 1
+            node.elseblock.accept(self)
+            self.level -= 1
+
+    def visit_IfNode(self, node: mparser.IfNode) -> None:
+        self.visit_default_func(node)
+        self.level += 1
+        node.condition.accept(self)
+        node.block.accept(self)
+        self.level -= 1
+
+class AstIDGenerator(AstVisitor):
+    def __init__(self) -> None:
+        self.counter = {}  # type: T.Dict[str, int]
+
+    def visit_default_func(self, node: mparser.BaseNode) -> None:
+        name = type(node).__name__
+        if name not in self.counter:
+            self.counter[name] = 0
+        node.ast_id = name + '#' + str(self.counter[name])
+        self.counter[name] += 1
+
+class AstConditionLevel(AstVisitor):
+    def __init__(self) -> None:
+        self.condition_level = 0
+
+    def visit_default_func(self, node: mparser.BaseNode) -> None:
+        node.condition_level = self.condition_level
+
+    def visit_ForeachClauseNode(self, node: mparser.ForeachClauseNode) -> None:
+        self.visit_default_func(node)
+        self.condition_level += 1
+        node.items.accept(self)
+        node.block.accept(self)
+        self.condition_level -= 1
+
+    def visit_IfClauseNode(self, node: mparser.IfClauseNode) -> None:
+        self.visit_default_func(node)
+        for i in node.ifs:
+            i.accept(self)
+        if node.elseblock:
+            self.condition_level += 1
+            node.elseblock.accept(self)
+            self.condition_level -= 1
+
+    def visit_IfNode(self, node: mparser.IfNode) -> None:
+        self.visit_default_func(node)
+        self.condition_level += 1
+        node.condition.accept(self)
+        node.block.accept(self)
+        self.condition_level -= 1