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// Copyright 2014 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 "src/main/cpp/blaze_util.h"
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <cassert>
#include <iostream>
#include "src/main/cpp/blaze_util_platform.h"
#include "src/main/cpp/util/errors.h"
#include "src/main/cpp/util/exit_code.h"
#include "src/main/cpp/util/file.h"
#include "src/main/cpp/util/logging.h"
#include "src/main/cpp/util/numbers.h"
#include "src/main/cpp/util/path_platform.h"
#include "src/main/cpp/util/port.h"
#include "src/main/cpp/util/strings.h"
namespace blaze {
using std::map;
using std::string;
using std::vector;
const char kServerPidFile[] = "server.pid.txt";
const unsigned int kPostShutdownGracePeriodSeconds = 60;
const unsigned int kPostKillGracePeriodSeconds = 10;
const char* GetUnaryOption(const char *arg,
const char *next_arg,
const char *key) {
const char *value = blaze_util::var_strprefix(arg, key);
if (value == NULL) {
return NULL;
} else if (value[0] == '=') {
return value + 1;
} else if (value[0]) {
return NULL; // trailing garbage in key name
}
return next_arg;
}
bool GetNullaryOption(const char *arg, const char *key) {
const char *value = blaze_util::var_strprefix(arg, key);
if (value == NULL) {
return false;
} else if (value[0] == '=') {
BAZEL_DIE(blaze_exit_code::BAD_ARGV)
<< "In argument '" << arg << "': option '" << key
<< "' does not take a value.";
} else if (value[0]) {
return false; // trailing garbage in key name
}
return true;
}
const char* SearchUnaryOption(const vector<string>& args,
const char *key) {
if (args.empty()) {
return NULL;
}
vector<string>::size_type i = 0;
for (; i < args.size() - 1; ++i) {
if (args[i] == "--") {
return NULL;
}
const char* result = GetUnaryOption(args[i].c_str(),
args[i + 1].c_str(),
key);
if (result != NULL) {
return result;
}
}
return GetUnaryOption(args[i].c_str(), NULL, key);
}
bool SearchNullaryOption(const vector<string>& args,
const string& flag_name,
const bool default_value) {
const string positive_flag = "--" + flag_name;
const string negative_flag = "--no" + flag_name;
bool result = default_value;
for (vector<string>::size_type i = 0; i < args.size(); i++) {
if (args[i] == "--") {
break;
}
if (GetNullaryOption(args[i].c_str(), positive_flag.c_str())) {
result = true;
} else if (GetNullaryOption(args[i].c_str(), negative_flag.c_str())) {
result = false;
}
}
return result;
}
bool IsArg(const string& arg) {
return blaze_util::starts_with(arg, "-") && (arg != "--help")
&& (arg != "-help") && (arg != "-h");
}
std::string AbsolutePathFromFlag(const std::string& value) {
if (value.empty()) {
return blaze_util::GetCwd();
} else {
return blaze_util::MakeAbsolute(value);
}
}
void LogWait(unsigned int elapsed_seconds, unsigned int wait_seconds) {
SigPrintf("WARNING: Waiting for server process to terminate "
"(waited %d seconds, waiting at most %d)\n",
elapsed_seconds, wait_seconds);
}
bool AwaitServerProcessTermination(int pid, const string& output_base,
unsigned int wait_seconds) {
uint64_t st = GetMillisecondsMonotonic();
const unsigned int first_seconds = 5;
bool logged_first = false;
const unsigned int second_seconds = 10;
bool logged_second = false;
const unsigned int third_seconds = 30;
bool logged_third = false;
while (VerifyServerProcess(pid, output_base)) {
TrySleep(100);
uint64_t elapsed_millis = GetMillisecondsMonotonic() - st;
if (!logged_first && elapsed_millis > first_seconds * 1000) {
LogWait(first_seconds, wait_seconds);
logged_first = true;
}
if (!logged_second && elapsed_millis > second_seconds * 1000) {
LogWait(second_seconds, wait_seconds);
logged_second = true;
}
if (!logged_third && elapsed_millis > third_seconds * 1000) {
LogWait(third_seconds, wait_seconds);
logged_third = true;
}
if (elapsed_millis > wait_seconds * 1000) {
SigPrintf("INFO: Waited %d seconds for server process (pid=%d) to"
" terminate.\n",
wait_seconds, pid);
return false;
}
}
return true;
}
// For now, we don't have the client set up to log to a file. If --client_debug
// is passed, however, all BAZEL_LOG statements will be output to stderr.
// If/when we switch to logging these to a file, care will have to be taken to
// either log to both stderr and the file in the case of --client_debug, or be
// ok that these log lines will only go to one stream.
void SetDebugLog(bool enabled) {
if (enabled) {
blaze_util::SetLoggingOutputStreamToStderr();
} else {
blaze_util::SetLoggingOutputStream(nullptr);
}
}
void WithEnvVars::SetEnvVars(const map<string, EnvVarValue>& vars) {
for (const auto& var : vars) {
switch (var.second.action) {
case EnvVarAction::UNSET:
UnsetEnv(var.first);
break;
case EnvVarAction::SET:
SetEnv(var.first, var.second.value);
break;
default:
assert(false);
}
}
}
WithEnvVars::WithEnvVars(const map<string, EnvVarValue>& vars) {
for (const auto& v : vars) {
if (ExistsEnv(v.first)) {
_old_values[v.first] = EnvVarValue(EnvVarAction::SET, GetEnv(v.first));
} else {
_old_values[v.first] = EnvVarValue(EnvVarAction::UNSET, "");
}
}
SetEnvVars(vars);
}
WithEnvVars::~WithEnvVars() {
SetEnvVars(_old_values);
}
} // namespace blaze
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