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132 lines
4.1 KiB
132 lines
4.1 KiB
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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#include "cmVariableWatchCommand.h"
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#include <sstream>
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#include "cmExecutionStatus.h"
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#include "cmListFileCache.h"
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#include "cmMakefile.h"
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#include "cmSystemTools.h"
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#include "cmVariableWatch.h"
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#include "cmake.h"
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struct cmVariableWatchCallbackData
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{
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bool InCallback;
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std::string Command;
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};
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static void cmVariableWatchCommandVariableAccessed(const std::string& variable,
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int access_type,
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void* client_data,
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const char* newValue,
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const cmMakefile* mf)
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{
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cmVariableWatchCallbackData* data =
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static_cast<cmVariableWatchCallbackData*>(client_data);
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if (data->InCallback) {
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return;
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}
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data->InCallback = true;
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cmListFileFunction newLFF;
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cmListFileArgument arg;
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bool processed = false;
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const char* accessString = cmVariableWatch::GetAccessAsString(access_type);
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const char* currentListFile = mf->GetDefinition("CMAKE_CURRENT_LIST_FILE");
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/// Ultra bad!!
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cmMakefile* makefile = const_cast<cmMakefile*>(mf);
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std::string stack = makefile->GetProperty("LISTFILE_STACK");
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if (!data->Command.empty()) {
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newLFF.Arguments.clear();
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newLFF.Arguments.emplace_back(variable, cmListFileArgument::Quoted, 9999);
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newLFF.Arguments.emplace_back(accessString, cmListFileArgument::Quoted,
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9999);
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newLFF.Arguments.emplace_back(newValue ? newValue : "",
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cmListFileArgument::Quoted, 9999);
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newLFF.Arguments.emplace_back(currentListFile, cmListFileArgument::Quoted,
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9999);
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newLFF.Arguments.emplace_back(stack, cmListFileArgument::Quoted, 9999);
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newLFF.Name = data->Command;
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newLFF.Line = 9999;
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cmExecutionStatus status;
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if (!makefile->ExecuteCommand(newLFF, status)) {
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std::ostringstream error;
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error << "Error in cmake code at\nUnknown:0:\n"
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<< "A command failed during the invocation of callback \""
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<< data->Command << "\".";
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cmSystemTools::Error(error.str().c_str());
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data->InCallback = false;
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return;
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}
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processed = true;
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}
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if (!processed) {
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std::ostringstream msg;
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msg << "Variable \"" << variable << "\" was accessed using "
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<< accessString << " with value \"" << (newValue ? newValue : "")
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<< "\".";
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makefile->IssueMessage(cmake::LOG, msg.str());
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}
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data->InCallback = false;
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}
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static void deleteVariableWatchCallbackData(void* client_data)
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{
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cmVariableWatchCallbackData* data =
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static_cast<cmVariableWatchCallbackData*>(client_data);
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delete data;
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}
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cmVariableWatchCommand::cmVariableWatchCommand()
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{
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}
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cmVariableWatchCommand::~cmVariableWatchCommand()
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{
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for (std::string const& wv : this->WatchedVariables) {
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this->Makefile->GetCMakeInstance()->GetVariableWatch()->RemoveWatch(
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wv, cmVariableWatchCommandVariableAccessed);
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}
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}
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bool cmVariableWatchCommand::InitialPass(std::vector<std::string> const& args,
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cmExecutionStatus&)
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{
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if (args.empty()) {
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this->SetError("must be called with at least one argument.");
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return false;
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}
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std::string const& variable = args[0];
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std::string command;
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if (args.size() > 1) {
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command = args[1];
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}
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if (variable == "CMAKE_CURRENT_LIST_FILE") {
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std::ostringstream ostr;
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ostr << "cannot be set on the variable: " << variable;
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this->SetError(ostr.str());
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return false;
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}
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cmVariableWatchCallbackData* data = new cmVariableWatchCallbackData;
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data->InCallback = false;
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data->Command = command;
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this->WatchedVariables.insert(variable);
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if (!this->Makefile->GetCMakeInstance()->GetVariableWatch()->AddWatch(
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variable, cmVariableWatchCommandVariableAccessed, data,
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deleteVariableWatchCallbackData)) {
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deleteVariableWatchCallbackData(data);
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return false;
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}
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return true;
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}
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