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cmake/Source/cmExecuteProcessCommand.cxx

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/*============================================================================
CMake - Cross Platform Makefile Generator
Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
Distributed under the OSI-approved BSD License (the "License");
see accompanying file Copyright.txt for details.
This software is distributed WITHOUT ANY WARRANTY; without even the
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the License for more information.
============================================================================*/
#include "cmExecuteProcessCommand.h"
#include "cmSystemTools.h"
#include <cmsys/Process.h>
#include <ctype.h> /* isspace */
static bool cmExecuteProcessCommandIsWhitespace(char c)
{
return (isspace((int)c) || c == '\n' || c == '\r');
}
void cmExecuteProcessCommandFixText(std::vector<char>& output,
bool strip_trailing_whitespace);
void cmExecuteProcessCommandAppend(std::vector<char>& output, const char* data,
int length);
// cmExecuteProcessCommand
bool cmExecuteProcessCommand::InitialPass(std::vector<std::string> const& args,
cmExecutionStatus&)
{
if (args.size() < 1) {
this->SetError("called with incorrect number of arguments");
return false;
}
std::vector<std::vector<const char*> > cmds;
std::string arguments;
bool doing_command = false;
size_t command_index = 0;
bool output_quiet = false;
bool error_quiet = false;
bool output_strip_trailing_whitespace = false;
bool error_strip_trailing_whitespace = false;
std::string timeout_string;
std::string input_file;
std::string output_file;
std::string error_file;
std::string output_variable;
std::string error_variable;
std::string result_variable;
std::string working_directory;
for (size_t i = 0; i < args.size(); ++i) {
if (args[i] == "COMMAND") {
doing_command = true;
command_index = cmds.size();
cmds.push_back(std::vector<const char*>());
} else if (args[i] == "OUTPUT_VARIABLE") {
doing_command = false;
if (++i < args.size()) {
output_variable = args[i];
} else {
this->SetError(" called with no value for OUTPUT_VARIABLE.");
return false;
}
} else if (args[i] == "ERROR_VARIABLE") {
doing_command = false;
if (++i < args.size()) {
error_variable = args[i];
} else {
this->SetError(" called with no value for ERROR_VARIABLE.");
return false;
}
} else if (args[i] == "RESULT_VARIABLE") {
doing_command = false;
if (++i < args.size()) {
result_variable = args[i];
} else {
this->SetError(" called with no value for RESULT_VARIABLE.");
return false;
}
} else if (args[i] == "WORKING_DIRECTORY") {
doing_command = false;
if (++i < args.size()) {
working_directory = args[i];
} else {
this->SetError(" called with no value for WORKING_DIRECTORY.");
return false;
}
} else if (args[i] == "INPUT_FILE") {
doing_command = false;
if (++i < args.size()) {
input_file = args[i];
} else {
this->SetError(" called with no value for INPUT_FILE.");
return false;
}
} else if (args[i] == "OUTPUT_FILE") {
doing_command = false;
if (++i < args.size()) {
output_file = args[i];
} else {
this->SetError(" called with no value for OUTPUT_FILE.");
return false;
}
} else if (args[i] == "ERROR_FILE") {
doing_command = false;
if (++i < args.size()) {
error_file = args[i];
} else {
this->SetError(" called with no value for ERROR_FILE.");
return false;
}
} else if (args[i] == "TIMEOUT") {
doing_command = false;
if (++i < args.size()) {
timeout_string = args[i];
} else {
this->SetError(" called with no value for TIMEOUT.");
return false;
}
} else if (args[i] == "OUTPUT_QUIET") {
doing_command = false;
output_quiet = true;
} else if (args[i] == "ERROR_QUIET") {
doing_command = false;
error_quiet = true;
} else if (args[i] == "OUTPUT_STRIP_TRAILING_WHITESPACE") {
doing_command = false;
output_strip_trailing_whitespace = true;
} else if (args[i] == "ERROR_STRIP_TRAILING_WHITESPACE") {
doing_command = false;
error_strip_trailing_whitespace = true;
} else if (doing_command) {
cmds[command_index].push_back(args[i].c_str());
} else {
std::ostringstream e;
e << " given unknown argument \"" << args[i] << "\".";
this->SetError(e.str());
return false;
}
}
if (!this->Makefile->CanIWriteThisFile(output_file.c_str())) {
std::string e = "attempted to output into a file: " + output_file +
" into a source directory.";
this->SetError(e);
cmSystemTools::SetFatalErrorOccured();
return false;
}
// Check for commands given.
if (cmds.empty()) {
this->SetError(" called with no COMMAND argument.");
return false;
}
for (unsigned int i = 0; i < cmds.size(); ++i) {
if (cmds[i].empty()) {
this->SetError(" given COMMAND argument with no value.");
return false;
} else {
// Add the null terminating pointer to the command argument list.
cmds[i].push_back(0);
}
}
// Parse the timeout string.
double timeout = -1;
if (!timeout_string.empty()) {
if (sscanf(timeout_string.c_str(), "%lg", &timeout) != 1) {
this->SetError(" called with TIMEOUT value that could not be parsed.");
return false;
}
}
// Create a process instance.
cmsysProcess* cp = cmsysProcess_New();
// Set the command sequence.
for (unsigned int i = 0; i < cmds.size(); ++i) {
cmsysProcess_AddCommand(cp, &*cmds[i].begin());
}
// Set the process working directory.
if (!working_directory.empty()) {
cmsysProcess_SetWorkingDirectory(cp, working_directory.c_str());
}
// Always hide the process window.
cmsysProcess_SetOption(cp, cmsysProcess_Option_HideWindow, 1);
// Check the output variables.
bool merge_output = false;
if (!input_file.empty()) {
cmsysProcess_SetPipeFile(cp, cmsysProcess_Pipe_STDIN, input_file.c_str());
}
if (!output_file.empty()) {
cmsysProcess_SetPipeFile(cp, cmsysProcess_Pipe_STDOUT,
output_file.c_str());
}
if (!error_file.empty()) {
if (error_file == output_file) {
merge_output = true;
} else {
cmsysProcess_SetPipeFile(cp, cmsysProcess_Pipe_STDERR,
error_file.c_str());
}
}
if (!output_variable.empty() && output_variable == error_variable) {
merge_output = true;
}
if (merge_output) {
cmsysProcess_SetOption(cp, cmsysProcess_Option_MergeOutput, 1);
}
// Set the timeout if any.
if (timeout >= 0) {
cmsysProcess_SetTimeout(cp, timeout);
}
// Start the process.
cmsysProcess_Execute(cp);
// Read the process output.
std::vector<char> tempOutput;
std::vector<char> tempError;
int length;
char* data;
int p;
while ((p = cmsysProcess_WaitForData(cp, &data, &length, 0), p)) {
// Put the output in the right place.
if (p == cmsysProcess_Pipe_STDOUT && !output_quiet) {
if (output_variable.empty()) {
cmSystemTools::Stdout(data, length);
} else {
cmExecuteProcessCommandAppend(tempOutput, data, length);
}
} else if (p == cmsysProcess_Pipe_STDERR && !error_quiet) {
if (error_variable.empty()) {
cmSystemTools::Stderr(data, length);
} else {
cmExecuteProcessCommandAppend(tempError, data, length);
}
}
}
// All output has been read. Wait for the process to exit.
cmsysProcess_WaitForExit(cp, 0);
// Fix the text in the output strings.
cmExecuteProcessCommandFixText(tempOutput, output_strip_trailing_whitespace);
cmExecuteProcessCommandFixText(tempError, error_strip_trailing_whitespace);
// Store the output obtained.
if (!output_variable.empty() && !tempOutput.empty()) {
this->Makefile->AddDefinition(output_variable, &*tempOutput.begin());
}
if (!merge_output && !error_variable.empty() && !tempError.empty()) {
this->Makefile->AddDefinition(error_variable, &*tempError.begin());
}
// Store the result of running the process.
if (!result_variable.empty()) {
switch (cmsysProcess_GetState(cp)) {
case cmsysProcess_State_Exited: {
int v = cmsysProcess_GetExitValue(cp);
char buf[100];
sprintf(buf, "%d", v);
this->Makefile->AddDefinition(result_variable, buf);
} break;
case cmsysProcess_State_Exception:
this->Makefile->AddDefinition(result_variable,
cmsysProcess_GetExceptionString(cp));
break;
case cmsysProcess_State_Error:
this->Makefile->AddDefinition(result_variable,
cmsysProcess_GetErrorString(cp));
break;
case cmsysProcess_State_Expired:
this->Makefile->AddDefinition(result_variable,
"Process terminated due to timeout");
break;
}
}
// Delete the process instance.
cmsysProcess_Delete(cp);
return true;
}
void cmExecuteProcessCommandFixText(std::vector<char>& output,
bool strip_trailing_whitespace)
{
// Remove \0 characters and the \r part of \r\n pairs.
unsigned int in_index = 0;
unsigned int out_index = 0;
while (in_index < output.size()) {
char c = output[in_index++];
if ((c != '\r' ||
!(in_index < output.size() && output[in_index] == '\n')) &&
c != '\0') {
output[out_index++] = c;
}
}
// Remove trailing whitespace if requested.
if (strip_trailing_whitespace) {
while (out_index > 0 &&
cmExecuteProcessCommandIsWhitespace(output[out_index - 1])) {
--out_index;
}
}
// Shrink the vector to the size needed.
output.resize(out_index);
// Put a terminator on the text string.
output.push_back('\0');
}
void cmExecuteProcessCommandAppend(std::vector<char>& output, const char* data,
int length)
{
#if defined(__APPLE__)
// HACK on Apple to work around bug with inserting at the
// end of an empty vector. This resulted in random failures
// that were hard to reproduce.
if (output.empty() && length > 0) {
output.push_back(data[0]);
++data;
--length;
}
#endif
output.insert(output.end(), data, data + length);
}