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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.
#include <windows.h>
#include <algorithm>
#include <fstream>
#include <iostream>
#include <sstream>
#include <string>
#include <vector>
#include "src/tools/launcher/launcher.h"
#include "src/tools/launcher/util/data_parser.h"
#include "src/tools/launcher/util/launcher_util.h"
namespace bazel {
namespace launcher {
using std::ifstream;
using std::ostringstream;
using std::string;
using std::unordered_map;
using std::vector;
BinaryLauncherBase::BinaryLauncherBase(
const LaunchDataParser::LaunchInfo& _launch_info, int argc, char* argv[])
: launch_info(_launch_info),
manifest_file(FindManifestFile(argv[0])),
workspace_name(GetLaunchInfoByKey(WORKSPACE_NAME)) {
for (int i = 0; i < argc; i++) {
this->commandline_arguments.push_back(argv[i]);
}
ParseManifestFile(&this->manifest_file_map, this->manifest_file);
}
static bool FindManifestFileImpl(const char* argv0, string* result) {
// If this binary X runs as the data-dependency of some other binary Y, then
// X has no runfiles manifest/directory and should use Y's.
if (GetEnv("RUNFILES_MANIFEST_FILE", result) &&
DoesFilePathExist(result->c_str())) {
return true;
}
string directory;
if (GetEnv("RUNFILES_DIR", &directory)) {
*result = directory + "/MANIFEST";
if (DoesFilePathExist(result->c_str())) {
return true;
}
}
// If this binary X runs by itself (not as a data-dependency of another
// binary), then look for the manifest in a runfiles directory next to the
// main binary, then look for it (the manifest) next to the main binary.
directory = GetBinaryPathWithExtension(argv0) + ".runfiles";
*result = directory + "/MANIFEST";
if (DoesFilePathExist(result->c_str())) {
return true;
}
*result = directory + "_manifest";
if (DoesFilePathExist(result->c_str())) {
return true;
}
return false;
}
string BinaryLauncherBase::FindManifestFile(const char* argv0) {
string manifest_file;
if (!FindManifestFileImpl(argv0, &manifest_file)) {
die("Couldn't find runfiles manifest file.");
}
// The path will be set as the RUNFILES_MANIFEST_FILE envvar and used by the
// shell script, so let's convert backslashes to forward slashes.
std::replace(manifest_file.begin(), manifest_file.end(), '\\', '/');
return manifest_file;
}
string BinaryLauncherBase::GetRunfilesPath() const {
string runfiles_path =
GetBinaryPathWithExtension(this->commandline_arguments[0]) + ".runfiles";
std::replace(runfiles_path.begin(), runfiles_path.end(), '/', '\\');
return runfiles_path;
}
void BinaryLauncherBase::ParseManifestFile(ManifestFileMap* manifest_file_map,
const string& manifest_path) {
ifstream manifest_file(AsAbsoluteWindowsPath(manifest_path.c_str()).c_str());
if (!manifest_file) {
die("Couldn't open MANIFEST file: %s", manifest_path.c_str());
}
string line;
while (getline(manifest_file, line)) {
size_t space_pos = line.find_first_of(' ');
if (space_pos == string::npos) {
die("Wrong MANIFEST format at line: %s", line.c_str());
}
string key = line.substr(0, space_pos);
string value = line.substr(space_pos + 1);
manifest_file_map->insert(make_pair(key, value));
}
}
string BinaryLauncherBase::Rlocation(const string& path,
bool need_workspace_name) const {
string query_path = path;
if (need_workspace_name) {
query_path = this->workspace_name + "/" + path;
}
auto entry = manifest_file_map.find(query_path);
if (entry == manifest_file_map.end()) {
die("Rlocation failed on %s, path doesn't exist in MANIFEST file",
query_path.c_str());
}
return entry->second;
}
string BinaryLauncherBase::GetLaunchInfoByKey(const string& key) {
auto item = launch_info.find(key);
if (item == launch_info.end()) {
die("Cannot find key \"%s\" from launch data.\n", key.c_str());
}
return item->second;
}
const vector<string>& BinaryLauncherBase::GetCommandlineArguments() const {
return this->commandline_arguments;
}
void BinaryLauncherBase::CreateCommandLine(
CmdLine* result, const string& executable,
const vector<string>& arguments) const {
ostringstream cmdline;
cmdline << '\"' << executable << '\"';
for (const auto& s : arguments) {
cmdline << ' ' << s;
}
string cmdline_str = cmdline.str();
if (cmdline_str.size() >= MAX_CMDLINE_LENGTH) {
die("Command line too long: %s", cmdline_str.c_str());
}
// Copy command line into a mutable buffer.
// CreateProcess is allowed to mutate its command line argument.
strncpy(result->cmdline, cmdline_str.c_str(), MAX_CMDLINE_LENGTH - 1);
result->cmdline[MAX_CMDLINE_LENGTH - 1] = 0;
}
bool BinaryLauncherBase::PrintLauncherCommandLine(
const string& executable, const vector<string>& arguments) const {
bool has_print_cmd_flag = false;
for (const auto& arg : arguments) {
has_print_cmd_flag |= (arg == "--print_launcher_command");
}
if (has_print_cmd_flag) {
printf("%s\n", executable.c_str());
for (const auto& arg : arguments) {
printf("%s\n", arg.c_str());
}
}
return has_print_cmd_flag;
}
ExitCode BinaryLauncherBase::LaunchProcess(const string& executable,
const vector<string>& arguments,
bool suppressOutput) const {
if (PrintLauncherCommandLine(executable, arguments)) {
return 0;
}
SetEnv("RUNFILES_MANIFEST_ONLY", "1");
SetEnv("RUNFILES_MANIFEST_FILE", manifest_file);
CmdLine cmdline;
CreateCommandLine(&cmdline, executable, arguments);
PROCESS_INFORMATION processInfo = {0};
STARTUPINFOA startupInfo = {0};
startupInfo.cb = sizeof(startupInfo);
BOOL ok = CreateProcessA(
/* lpApplicationName */ NULL,
/* lpCommandLine */ cmdline.cmdline,
/* lpProcessAttributes */ NULL,
/* lpThreadAttributes */ NULL,
/* bInheritHandles */ FALSE,
/* dwCreationFlags */
suppressOutput ? CREATE_NO_WINDOW // no console window => no output
: 0,
/* lpEnvironment */ NULL,
/* lpCurrentDirectory */ NULL,
/* lpStartupInfo */ &startupInfo,
/* lpProcessInformation */ &processInfo);
if (!ok) {
PrintError("Cannot launch process: %s\nReason: %s",
cmdline.cmdline,
GetLastErrorString().c_str());
return GetLastError();
}
WaitForSingleObject(processInfo.hProcess, INFINITE);
ExitCode exit_code;
GetExitCodeProcess(processInfo.hProcess,
reinterpret_cast<LPDWORD>(&exit_code));
CloseHandle(processInfo.hProcess);
CloseHandle(processInfo.hThread);
return exit_code;
}
} // namespace launcher
} // namespace bazel
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