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, 46 insertions, 0 deletions

diff --git a/src/dyndep_parser.h b/src/dyndep_parser.h
new file mode 100644
index 0000000..09a3722
--- /dev/null
+++ b/src/dyndep_parser.h
@@ -0,0 +1,46 @@
+// 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_PARSER_H_
+#define NINJA_DYNDEP_PARSER_H_
+
+#include "eval_env.h"
+#include "parser.h"
+
+struct DyndepFile;
+struct EvalString;
+
+/// Parses dyndep files.
+struct DyndepParser: public Parser {
+  DyndepParser(State* state, FileReader* file_reader,
+               DyndepFile* dyndep_file);
+
+  /// Parse a text string of input.  Used by tests.
+  bool ParseTest(const string& input, string* err) {
+    return Parse("input", input, err);
+  }
+
+private:
+  /// Parse a file, given its contents as a string.
+  bool Parse(const string& filename, const string& input, string* err);
+
+  bool ParseDyndepVersion(string* err);
+  bool ParseLet(string* key, EvalString* val, string* err);
+  bool ParseEdge(string* err);
+
+  DyndepFile* dyndep_file_;
+  BindingEnv env_;
+};
+
+#endif  // NINJA_DYNDEP_PARSER_H_