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// Copyright 2011 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_NINJA_H_
#define NINJA_NINJA_H_
#include <algorithm>
#include <queue>
#include <set>
#include <string>
#include <vector>
#include <assert.h>
using namespace std;
#include "eval_env.h"
#include "hash_map.h"
struct Edge;
struct FileStat;
struct Node;
struct Rule;
int ReadFile(const string& path, string* contents, string* err);
/// Interface for accessing the disk.
///
/// Abstract so it can be mocked out for tests. The real implementation
/// is RealDiskInterface.
struct DiskInterface {
virtual ~DiskInterface() {}
/// stat() a file, returning the mtime, or 0 if missing and -1 on
/// other errors.
virtual int Stat(const string& path) = 0;
/// Create a directory, returning false on failure.
virtual bool MakeDir(const string& path) = 0;
/// Read a file to a string. Fill in |err| on error.
virtual string ReadFile(const string& path, string* err) = 0;
/// Remove the file named @a path. It behaves like 'rm -f path' so no errors
/// are reported if it does not exists.
/// @returns 0 if the file has been removed,
/// 1 if the file does not exist, and
/// -1 if an error occurs.
virtual int RemoveFile(const string& path) = 0;
/// Create all the parent directories for path; like mkdir -p
/// `basename path`.
bool MakeDirs(const string& path);
};
/// Implementation of DiskInterface that actually hits the disk.
struct RealDiskInterface : public DiskInterface {
virtual ~RealDiskInterface() {}
virtual int Stat(const string& path);
virtual bool MakeDir(const string& path);
virtual string ReadFile(const string& path, string* err);
virtual int RemoveFile(const string& path);
};
/// Mapping of path -> FileStat.
struct StatCache {
typedef hash_map<string, FileStat*> Paths;
Paths paths_;
FileStat* GetFile(const string& path);
/// Dump the mapping to stdout (useful for debugging).
void Dump();
void Reload();
};
/// Global state (file status, loaded rules) for a single run.
struct State {
State();
StatCache* stat_cache() { return &stat_cache_; }
void AddRule(const Rule* rule);
const Rule* LookupRule(const string& rule_name);
Edge* AddEdge(const Rule* rule);
Node* GetNode(const string& path);
Node* LookupNode(const string& path);
void AddIn(Edge* edge, const string& path);
void AddOut(Edge* edge, const string& path);
/// @return the root node(s) of the graph. (Root nodes have no output edges).
/// @param error where to write the error message if somethings went wrong.
vector<Node*> RootNodes(string* error);
StatCache stat_cache_;
/// All the rules used in the graph.
map<string, const Rule*> rules_;
/// All the edges of the graph.
vector<Edge*> edges_;
BindingEnv bindings_;
struct BuildLog* build_log_;
static const Rule kPhonyRule;
};
#endif // NINJA_NINJA_H_
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