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// Copyright 2017 The Bazel Authors. 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 BAZEL_SRC_TOOLS_LAUNCHER_LAUNCHER_H_
#define BAZEL_SRC_TOOLS_LAUNCHER_LAUNCHER_H_
#include <string>
#include <unordered_map>
#include <vector>
#include "src/tools/launcher/util/data_parser.h"
namespace bazel {
namespace launcher {
typedef int32_t ExitCode;
static constexpr const char* WORKSPACE_NAME = "workspace_name";
// The maximum length of lpCommandLine is 32768 characters.
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms682425(v=vs.85).aspx
static const int MAX_CMDLINE_LENGTH = 32768;
struct CmdLine {
char cmdline[MAX_CMDLINE_LENGTH];
};
class BinaryLauncherBase {
typedef std::unordered_map<std::string, std::string> ManifestFileMap;
public:
BinaryLauncherBase(const LaunchDataParser::LaunchInfo& launch_info, int argc,
char* argv[]);
// Get launch information based on a launch info key.
std::string GetLaunchInfoByKey(const std::string& key);
// Get the original command line arguments passed to this binary.
const std::vector<std::string>& GetCommandlineArguments() const;
// Map a runfile path to its absolute path.
std::string Rlocation(const std::string& path) const;
// Lauch a process with given executable and command line arguments.
//
// exectuable: the binary to be executed.
// arguments: the command line arguments to be passed to the exectuable,
// it doesn't include the exectuable itself.
ExitCode LaunchProcess(const std::string& executable,
const std::vector<std::string>& arguments) const;
// A launch function to be implemented for a specific language.
virtual ExitCode Launch() = 0;
private:
// A map to store all the launch information.
const LaunchDataParser::LaunchInfo& launch_info;
// The commandline arguments recieved.
// The first argument is the path of this launcher itself.
std::vector<std::string> commandline_arguments;
// The workspace name of the repository this target belongs to.
std::string workspace_name;
// A map to store all entries of the manifest file.
std::unordered_map<std::string, std::string> manifest_file_map;
// Create a command line to be passed to Windows CreateProcessA API.
//
// exectuable: the binary to be executed.
// arguments: the command line arguments to be passed to the exectuable,
// it doesn't include the exectuable itself.
void CreateCommandLine(CmdLine* result, const std::string& executable,
const std::vector<std::string>& arguments) const;
// Find manifest file of the binary
//
// Expect the manifest file to be at
// 1. <path>/<to>/<binary>/<target_name>.runfiles/MANIFEST
// or 2. <path>/<to>/<binary>/<target_name>.runfiles_manifest
std::string FindManifestFile() const;
// Parse manifest file into a map
static void ParseManifestFile(ManifestFileMap* manifest_file_map,
const std::string& manifest_path);
};
} // namespace launcher
} // namespace bazel
#endif // BAZEL_SRC_TOOLS_LAUNCHER_LAUNCHER_H_
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