mirror of
https://github.com/Kitware/CMake.git
synced 2026-11-06 05:16:58 +00:00
Cristian Adam
947ec5e324
Caching results of file system queries during configure requires forgetting them whenever files may have been removed or renamed, i.e. by file(RENAME), file(REMOVE), execute_process, exec_program, try_compile, or try_run, and at the start of every configure in the same process. Add cmake::InvalidateFileSystemCaches and call it from those places. It does nothing yet. Later commits add individual caches to it.
629 lines
21 KiB
C++
629 lines
21 KiB
C++
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file LICENSE.rst or https://cmake.org/licensing for details. */
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#include "cmExecuteProcessCommand.h"
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#include <cstdint>
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#include <cstdio>
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#include <iostream>
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#include <map>
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#include <memory>
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#include <utility>
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#include <vector>
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#include <cm/optional>
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#include <cm/string_view>
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#include <cmext/algorithm>
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#include <cmext/string_view>
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#include <cm3p/uv.h>
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#ifndef _WIN32
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# include <fcntl.h>
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# include "cm_fileno.hxx"
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#endif
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#include "cmsys/String.h"
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#include "cmArgumentParser.h"
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#include "cmArgumentParserTypes.h"
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#include "cmDiagnostics.h"
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#include "cmEnvironment.h"
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#include "cmExecutionStatus.h"
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#include "cmList.h"
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#include "cmMakefile.h"
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#include "cmMessageType.h"
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#include "cmPolicies.h"
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#include "cmProcessOutput.h"
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#include "cmStringAlgorithms.h"
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#include "cmSystemTools.h"
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#include "cmUVHandlePtr.h"
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#include "cmUVProcessChain.h"
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#include "cmUVStream.h"
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#include "cmake.h"
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namespace {
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bool cmExecuteProcessCommandIsWhitespace(char c)
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{
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return (cmsysString_isspace(c) || c == '\n' || c == '\r');
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}
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FILE* FopenCLOEXEC(std::string const& path, char const* mode)
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{
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FILE* f = cmsys::SystemTools::Fopen(path, mode);
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#ifndef _WIN32
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if (f) {
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if (fcntl(cm_fileno(f), F_SETFD, FD_CLOEXEC) < 0) {
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fclose(f);
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f = nullptr;
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}
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}
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#endif
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return f;
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}
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void cmExecuteProcessCommandFixText(std::vector<char>& output,
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bool strip_trailing_whitespace);
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void cmExecuteProcessCommandAppend(std::vector<char>& output, char const* data,
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std::size_t length);
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}
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// cmExecuteProcessCommand
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bool cmExecuteProcessCommand(std::vector<std::string> const& args,
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cmExecutionStatus& status)
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{
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if (args.empty()) {
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status.SetError("called with incorrect number of arguments");
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return false;
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}
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struct Arguments : public ArgumentParser::ParseResult
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{
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ArgumentParser::MaybeEmpty<std::vector<std::vector<std::string>>> Commands;
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std::string OutputVariable;
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std::string ErrorVariable;
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std::string ResultVariable;
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std::string ResultsVariable;
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std::string WorkingDirectory;
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std::string InputFile;
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std::string OutputFile;
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std::string ErrorFile;
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std::string Timeout;
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std::string CommandEcho;
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bool OutputQuiet = false;
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bool ErrorQuiet = false;
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bool OutputStripTrailingWhitespace = false;
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bool ErrorStripTrailingWhitespace = false;
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bool EchoOutputVariable = false;
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bool EchoErrorVariable = false;
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cm::optional<std::string> Encoding;
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ArgumentParser::MaybeEmpty<std::vector<std::string>> Environment;
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ArgumentParser::MaybeEmpty<std::vector<std::string>> EnvModification;
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std::string CommandErrorIsFatal;
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};
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static auto const parser =
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cmArgumentParser<Arguments>{}
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.Bind("COMMAND"_s, &Arguments::Commands)
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.Bind("COMMAND_ECHO"_s, &Arguments::CommandEcho)
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.Bind("OUTPUT_VARIABLE"_s, &Arguments::OutputVariable)
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.Bind("ERROR_VARIABLE"_s, &Arguments::ErrorVariable)
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.Bind("RESULT_VARIABLE"_s, &Arguments::ResultVariable)
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.Bind("RESULTS_VARIABLE"_s, &Arguments::ResultsVariable)
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.Bind("WORKING_DIRECTORY"_s, &Arguments::WorkingDirectory)
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.Bind("INPUT_FILE"_s, &Arguments::InputFile)
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.Bind("OUTPUT_FILE"_s, &Arguments::OutputFile)
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.Bind("ERROR_FILE"_s, &Arguments::ErrorFile)
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.Bind("TIMEOUT"_s, &Arguments::Timeout)
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.Bind("OUTPUT_QUIET"_s, &Arguments::OutputQuiet)
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.Bind("ERROR_QUIET"_s, &Arguments::ErrorQuiet)
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.Bind("OUTPUT_STRIP_TRAILING_WHITESPACE"_s,
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&Arguments::OutputStripTrailingWhitespace)
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.Bind("ERROR_STRIP_TRAILING_WHITESPACE"_s,
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&Arguments::ErrorStripTrailingWhitespace)
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.Bind("ENCODING"_s, &Arguments::Encoding)
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.Bind("ENVIRONMENT"_s, &Arguments::Environment)
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.Bind("ENVIRONMENT_MODIFICATION"_s, &Arguments::EnvModification)
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.Bind("ECHO_OUTPUT_VARIABLE"_s, &Arguments::EchoOutputVariable)
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.Bind("ECHO_ERROR_VARIABLE"_s, &Arguments::EchoErrorVariable)
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.Bind("COMMAND_ERROR_IS_FATAL"_s, &Arguments::CommandErrorIsFatal);
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std::vector<std::string> unparsedArguments;
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Arguments arguments = parser.Parse(args, &unparsedArguments);
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if (arguments.MaybeReportError(status.GetMakefile())) {
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return true;
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}
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if (!unparsedArguments.empty()) {
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status.SetError(cmStrCat(" given unknown argument \"",
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unparsedArguments.front(), "\"."));
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return false;
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}
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std::string inputFilename = arguments.InputFile;
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std::string outputFilename = arguments.OutputFile;
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std::string errorFilename = arguments.ErrorFile;
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if (!arguments.WorkingDirectory.empty()) {
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if (!inputFilename.empty()) {
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inputFilename = cmSystemTools::CollapseFullPath(
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inputFilename, arguments.WorkingDirectory);
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}
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if (!outputFilename.empty()) {
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outputFilename = cmSystemTools::CollapseFullPath(
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outputFilename, arguments.WorkingDirectory);
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}
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if (!errorFilename.empty()) {
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errorFilename = cmSystemTools::CollapseFullPath(
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errorFilename, arguments.WorkingDirectory);
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}
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}
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if (!status.GetMakefile().CanIWriteThisFile(outputFilename)) {
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status.SetError(cmStrCat("attempted to output into a file: ",
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outputFilename, " into a source directory."));
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cmSystemTools::SetFatalErrorOccurred();
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return false;
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}
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// Check for commands given.
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if (arguments.Commands.empty()) {
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status.SetError(" called with no COMMAND argument.");
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return false;
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}
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for (std::vector<std::string>& cmd : arguments.Commands) {
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if (cmd.empty()) {
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status.SetError(" given COMMAND argument with no value.");
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return false;
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}
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cmSystemTools::MaybePrependCmdExe(cmd);
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}
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// Parse the timeout string.
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double timeout = -1;
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if (!arguments.Timeout.empty()) {
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if (sscanf(arguments.Timeout.c_str(), "%lg", &timeout) != 1) {
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status.SetError(" called with TIMEOUT value that could not be parsed.");
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return false;
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}
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}
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std::string commandErrorIsFatal = arguments.CommandErrorIsFatal;
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if (commandErrorIsFatal.empty() && arguments.ResultVariable.empty() &&
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arguments.ResultsVariable.empty()) {
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commandErrorIsFatal = status.GetMakefile().GetSafeDefinition(
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"CMAKE_EXECUTE_PROCESS_COMMAND_ERROR_IS_FATAL");
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}
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if (!commandErrorIsFatal.empty() && commandErrorIsFatal != "ANY"_s &&
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commandErrorIsFatal != "LAST"_s && commandErrorIsFatal != "NONE"_s) {
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if (!arguments.CommandErrorIsFatal.empty()) {
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status.SetError(
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"COMMAND_ERROR_IS_FATAL option can be ANY, LAST or NONE");
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return false;
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}
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status.SetError(cmStrCat(
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"Using CMAKE_EXECUTE_PROCESS_COMMAND_ERROR_IS_FATAL with invalid value "
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"\"",
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commandErrorIsFatal, "\". This variable can be ANY, LAST or NONE"));
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return false;
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}
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// Create a process instance.
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cmUVProcessChainBuilder builder;
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// Set the command sequence.
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for (std::vector<std::string> const& cmd : arguments.Commands) {
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builder.AddCommand(cmd);
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}
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// Set the process working directory.
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if (!arguments.WorkingDirectory.empty()) {
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builder.SetWorkingDirectory(arguments.WorkingDirectory);
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}
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if (!arguments.Environment.empty() || !arguments.EnvModification.empty()) {
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#ifndef CMAKE_BOOTSTRAP
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auto diff = cmEnvironmentModification{};
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if (!diff.Add(arguments.EnvModification)) {
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return false;
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}
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auto env = cmEnvironment{ cmSystemTools::GetEnvironmentVariables() };
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env.Update(arguments.Environment);
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diff.ApplyTo(env);
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builder.SetEnvironment(env.GetVariables());
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#else
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status.SetError(
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"does not support environment modification in bootstrap builds");
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return false;
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#endif
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}
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// Check the output variables.
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std::unique_ptr<FILE, int (*)(FILE*)> inputFile(nullptr, fclose);
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if (!inputFilename.empty()) {
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inputFile.reset(FopenCLOEXEC(inputFilename, "rb"));
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if (inputFile) {
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builder.SetExternalStream(cmUVProcessChainBuilder::Stream_INPUT,
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inputFile.get());
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}
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} else {
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builder.SetExternalStream(cmUVProcessChainBuilder::Stream_INPUT, stdin);
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}
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std::unique_ptr<FILE, int (*)(FILE*)> outputFile(nullptr, fclose);
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if (!outputFilename.empty()) {
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outputFile.reset(FopenCLOEXEC(outputFilename, "wb"));
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if (outputFile) {
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builder.SetExternalStream(cmUVProcessChainBuilder::Stream_OUTPUT,
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outputFile.get());
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}
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} else {
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if (arguments.OutputVariable == arguments.ErrorVariable &&
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!arguments.ErrorVariable.empty()) {
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builder.SetMergedBuiltinStreams();
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} else {
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builder.SetBuiltinStream(cmUVProcessChainBuilder::Stream_OUTPUT);
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}
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}
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std::unique_ptr<FILE, int (*)(FILE*)> errorFile(nullptr, fclose);
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if (!errorFilename.empty()) {
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if (errorFilename == outputFilename) {
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if (outputFile) {
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builder.SetExternalStream(cmUVProcessChainBuilder::Stream_ERROR,
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outputFile.get());
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}
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} else {
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errorFile.reset(FopenCLOEXEC(errorFilename, "wb"));
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if (errorFile) {
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builder.SetExternalStream(cmUVProcessChainBuilder::Stream_ERROR,
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errorFile.get());
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}
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}
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} else if (arguments.ErrorVariable.empty() ||
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(!arguments.ErrorVariable.empty() &&
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arguments.OutputVariable != arguments.ErrorVariable)) {
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builder.SetBuiltinStream(cmUVProcessChainBuilder::Stream_ERROR);
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}
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// Set the timeout if any.
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int64_t timeoutMillis = static_cast<int64_t>(timeout * 1000.0);
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bool echo_stdout = false;
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bool echo_stderr = false;
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bool echo_output_from_variable = true;
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std::string echo_output = status.GetMakefile().GetSafeDefinition(
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"CMAKE_EXECUTE_PROCESS_COMMAND_ECHO");
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if (!arguments.CommandEcho.empty()) {
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echo_output_from_variable = false;
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echo_output = arguments.CommandEcho;
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}
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if (!echo_output.empty()) {
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if (echo_output == "STDERR") {
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echo_stderr = true;
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} else if (echo_output == "STDOUT") {
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echo_stdout = true;
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} else if (echo_output != "NONE") {
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std::string error;
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if (echo_output_from_variable) {
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error = "CMAKE_EXECUTE_PROCESS_COMMAND_ECHO set to '";
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} else {
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error = " called with '";
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}
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error = cmStrCat(std::move(error), std::move(echo_output),
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"' expected STDERR|STDOUT|NONE");
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if (!echo_output_from_variable) {
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error += " for COMMAND_ECHO.";
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}
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status.GetMakefile().IssueMessage(MessageType::FATAL_ERROR, error);
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return true;
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}
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}
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if (echo_stdout || echo_stderr) {
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std::string command;
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for (auto const& cmd : arguments.Commands) {
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command = cmStrCat(std::move(command), '\'', cmJoin(cmd, "' '"), "'\n");
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}
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if (echo_stdout) {
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std::cout << command;
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} else if (echo_stderr) {
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std::cerr << command;
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}
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}
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// Start the process.
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auto chain = builder.Start();
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bool timedOut = false;
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cm::uv_timer_ptr timer;
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if (timeoutMillis >= 0) {
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timer.init(chain.GetLoop(), &timedOut);
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timer.start(
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[](uv_timer_t* handle) {
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auto* timeoutPtr = static_cast<bool*>(handle->data);
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*timeoutPtr = true;
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},
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timeoutMillis, 0, cm::uv_update_time::yes);
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}
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// Read the process output.
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struct ReadData
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{
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uv_stream_t* Stream = nullptr;
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bool Finished = false;
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std::vector<char> Output;
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};
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ReadData outputData;
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ReadData errorData;
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outputData.Stream = chain.OutputStream();
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errorData.Stream = chain.ErrorStream();
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cmPolicies::PolicyStatus const cmp0176 =
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status.GetMakefile().GetPolicyStatus(cmPolicies::CMP0176);
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cmProcessOutput::Encoding encoding =
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cmp0176 == cmPolicies::OLD || cmp0176 == cmPolicies::WARN
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? cmProcessOutput::Auto
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: cmProcessOutput::UTF8;
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if (arguments.Encoding) {
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if (cm::optional<cmProcessOutput::Encoding> maybeEncoding =
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cmProcessOutput::FindEncoding(*arguments.Encoding)) {
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encoding = *maybeEncoding;
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} else {
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status.GetMakefile().IssueDiagnostic(
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cmDiagnostics::CMD_AUTHOR,
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cmStrCat("ENCODING option given unknown value \"", *arguments.Encoding,
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"\". Ignoring."));
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}
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}
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cmProcessOutput processOutput(encoding);
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std::string strdata;
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std::unique_ptr<cmUVStreamReadHandle> outputHandle;
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if (outputData.Stream) {
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outputHandle = cmUVStreamRead(
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outputData.Stream,
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[&arguments, &processOutput, &outputData,
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&strdata](std::vector<char> data) {
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if (!arguments.OutputQuiet) {
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if (arguments.OutputVariable.empty() ||
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arguments.EchoOutputVariable) {
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processOutput.DecodeText(data.data(), data.size(), strdata, 1);
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cmSystemTools::Stdout(strdata);
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}
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if (!arguments.OutputVariable.empty()) {
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cmExecuteProcessCommandAppend(outputData.Output, data.data(),
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data.size());
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}
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}
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},
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[&outputData]() { outputData.Finished = true; });
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} else {
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outputData.Finished = true;
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}
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std::unique_ptr<cmUVStreamReadHandle> errorHandle;
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if (errorData.Stream) {
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errorHandle = cmUVStreamRead(
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errorData.Stream,
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[&arguments, &processOutput, &errorData,
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&strdata](std::vector<char> data) {
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if (!arguments.ErrorQuiet) {
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if (arguments.ErrorVariable.empty() || arguments.EchoErrorVariable) {
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processOutput.DecodeText(data.data(), data.size(), strdata, 2);
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cmSystemTools::Stderr(strdata);
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}
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if (!arguments.ErrorVariable.empty()) {
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cmExecuteProcessCommandAppend(errorData.Output, data.data(),
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data.size());
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}
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}
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},
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[&errorData]() { errorData.Finished = true; });
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} else {
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errorData.Finished = true;
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}
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while (chain.Valid() && !timedOut &&
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!(chain.Finished() && outputData.Finished && errorData.Finished)) {
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uv_run(&chain.GetLoop(), UV_RUN_ONCE);
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}
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if (timedOut) {
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chain.Terminate();
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}
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// The processes may have removed or renamed files.
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status.GetMakefile().GetCMakeInstance()->InvalidateFileSystemCaches();
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if (!arguments.OutputQuiet &&
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(arguments.OutputVariable.empty() || arguments.EchoOutputVariable)) {
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processOutput.DecodeText(std::string(), strdata, 1);
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if (!strdata.empty()) {
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cmSystemTools::Stdout(strdata);
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}
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}
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if (!arguments.ErrorQuiet &&
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(arguments.ErrorVariable.empty() || arguments.EchoErrorVariable)) {
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processOutput.DecodeText(std::string(), strdata, 2);
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if (!strdata.empty()) {
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cmSystemTools::Stderr(strdata);
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}
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}
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// All output has been read.
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processOutput.DecodeText(outputData.Output, outputData.Output);
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processOutput.DecodeText(errorData.Output, errorData.Output);
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// Fix the text in the output strings.
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cmExecuteProcessCommandFixText(outputData.Output,
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arguments.OutputStripTrailingWhitespace);
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cmExecuteProcessCommandFixText(errorData.Output,
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arguments.ErrorStripTrailingWhitespace);
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// Store the output obtained.
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if (!arguments.OutputVariable.empty() && !outputData.Output.empty()) {
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status.GetMakefile().AddDefinition(arguments.OutputVariable,
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outputData.Output.data());
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}
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if (arguments.ErrorVariable != arguments.OutputVariable &&
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!arguments.ErrorVariable.empty() && !errorData.Output.empty()) {
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status.GetMakefile().AddDefinition(arguments.ErrorVariable,
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errorData.Output.data());
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}
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// Store the result of running the process.
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if (!arguments.ResultVariable.empty()) {
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if (timedOut) {
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status.GetMakefile().AddDefinition(arguments.ResultVariable,
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"Process terminated due to timeout");
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} else {
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auto const* lastStatus = chain.GetStatus().back();
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auto exception = lastStatus->GetException();
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if (exception.first == cmUVProcessChain::ExceptionCode::None) {
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status.GetMakefile().AddDefinition(
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arguments.ResultVariable,
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std::to_string(static_cast<int>(lastStatus->ExitStatus)));
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} else {
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status.GetMakefile().AddDefinition(arguments.ResultVariable,
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exception.second);
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}
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}
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}
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// Store the result of running the processes.
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if (!arguments.ResultsVariable.empty()) {
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if (timedOut) {
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status.GetMakefile().AddDefinition(arguments.ResultsVariable,
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"Process terminated due to timeout");
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} else {
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std::vector<std::string> res;
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for (auto const* processStatus : chain.GetStatus()) {
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auto exception = processStatus->GetException();
|
|
if (exception.first == cmUVProcessChain::ExceptionCode::None) {
|
|
res.emplace_back(
|
|
std::to_string(static_cast<int>(processStatus->ExitStatus)));
|
|
} else {
|
|
res.emplace_back(exception.second);
|
|
}
|
|
}
|
|
status.GetMakefile().AddDefinition(arguments.ResultsVariable,
|
|
cmList::to_string(res));
|
|
}
|
|
}
|
|
|
|
auto queryProcessStatusByIndex = [&chain](std::size_t index) -> std::string {
|
|
auto const& processStatus = chain.GetStatus(index);
|
|
auto exception = processStatus.GetException();
|
|
if (exception.first == cmUVProcessChain::ExceptionCode::None) {
|
|
if (processStatus.ExitStatus) {
|
|
return cmStrCat("Child return code: ", processStatus.ExitStatus);
|
|
}
|
|
return "";
|
|
}
|
|
return cmStrCat("Abnormal exit with child return code: ",
|
|
exception.second);
|
|
};
|
|
|
|
if (commandErrorIsFatal == "ANY"_s) {
|
|
bool ret = true;
|
|
if (timedOut) {
|
|
status.SetError("Process terminated due to timeout");
|
|
ret = false;
|
|
} else {
|
|
std::map<std::size_t, std::string> failureIndices;
|
|
auto statuses = chain.GetStatus();
|
|
for (std::size_t i = 0; i < statuses.size(); ++i) {
|
|
std::string processStatus = queryProcessStatusByIndex(i);
|
|
if (!processStatus.empty()) {
|
|
failureIndices[i] = processStatus;
|
|
}
|
|
}
|
|
if (!failureIndices.empty()) {
|
|
std::string oss = "failed command indexes:\n";
|
|
for (auto const& e : failureIndices) {
|
|
oss = cmStrCat(std::move(oss), " ", e.first + 1, ": \"", e.second,
|
|
"\"\n");
|
|
}
|
|
status.SetError(oss);
|
|
ret = false;
|
|
}
|
|
}
|
|
|
|
if (!ret) {
|
|
cmSystemTools::SetFatalErrorOccurred();
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (commandErrorIsFatal == "LAST"_s) {
|
|
bool ret = true;
|
|
if (timedOut) {
|
|
status.SetError("Process terminated due to timeout");
|
|
ret = false;
|
|
} else {
|
|
auto const& lastStatus = chain.GetStatus(arguments.Commands.size() - 1);
|
|
auto exception = lastStatus.GetException();
|
|
if (exception.first != cmUVProcessChain::ExceptionCode::None) {
|
|
status.SetError(cmStrCat("Abnormal exit: ", exception.second));
|
|
ret = false;
|
|
} else {
|
|
int lastIndex = static_cast<int>(arguments.Commands.size() - 1);
|
|
std::string const processStatus = queryProcessStatusByIndex(lastIndex);
|
|
if (!processStatus.empty()) {
|
|
status.SetError("last command failed");
|
|
ret = false;
|
|
}
|
|
}
|
|
}
|
|
if (!ret) {
|
|
cmSystemTools::SetFatalErrorOccurred();
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
namespace {
|
|
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, char const* data,
|
|
std::size_t 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
|
|
cm::append(output, data, data + length);
|
|
}
|
|
}
|