Add a parser for a new "dyndep" file format

Define a file format suitable for specifying dynamically-discovered
dependency information for build edges.  Design a format inspired by the
build manifest format and using the same lexer.  Start with a required
format version specification followed by "build" statements that add
implicit inputs and outputs to existing edges.

1 files changed, 38 insertions, 0 deletions

diff --git a/src/dyndep.h b/src/dyndep.h
new file mode 100644
index 0000000..80c5d1b
--- /dev/null
+++ b/src/dyndep.h
@@ -0,0 +1,38 @@
+// Copyright 2015 Google Inc. All Rights Reserved.
+//
+// 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.
+
+#ifndef NINJA_DYNDEP_LOADER_H_
+#define NINJA_DYNDEP_LOADER_H_
+
+#include <map>
+#include <vector>
+
+struct Edge;
+struct Node;
+
+/// Store dynamically-discovered dependency information for one edge.
+struct Dyndeps {
+  Dyndeps() : restat_(false) {}
+  bool restat_;
+  std::vector<Node*> implicit_inputs_;
+  std::vector<Node*> implicit_outputs_;
+};
+
+/// Store data loaded from one dyndep file.  Map from an edge
+/// to its dynamically-discovered dependency information.
+/// This is a struct rather than a typedef so that we can
+/// forward-declare it in other headers.
+struct DyndepFile: public std::map<Edge*, Dyndeps> {};
+
+#endif  // NINJA_DYNDEP_LOADER_H_