CMake/Source/cmListFileCache.cxx

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/*============================================================================
CMake - Cross Platform Makefile Generator
Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
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Distributed under the OSI-approved BSD License (the "License");
see accompanying file Copyright.txt for details.
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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 "cmListFileCache.h"
#include "cmListFileLexer.h"
#include "cmSystemTools.h"
#include "cmMakefile.h"
#include "cmVersion.h"
#include <cmsys/RegularExpression.hxx>
#ifdef __BORLANDC__
# pragma warn -8060 /* possibly incorrect assignment */
#endif
bool cmListFileCacheParseFunction(cmListFileLexer* lexer,
cmListFileFunction& function,
const char* filename);
bool cmListFile::ParseFile(const char* filename,
bool topLevel,
cmMakefile *mf)
{
if(!cmSystemTools::FileExists(filename))
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{
return false;
}
// Create the scanner.
cmListFileLexer* lexer = cmListFileLexer_New();
if(!lexer)
{
cmSystemTools::Error("cmListFileCache: error allocating lexer ");
return false;
}
// Open the file.
if(!cmListFileLexer_SetFileName(lexer, filename))
{
cmListFileLexer_Delete(lexer);
cmSystemTools::Error("cmListFileCache: error can not open file ",
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filename);
return false;
}
// Use a simple recursive-descent parser to process the token
// stream.
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this->ModifiedTime = cmSystemTools::ModifiedTime(filename);
bool parseError = false;
bool haveNewline = true;
cmListFileLexer_Token* token;
while(!parseError && (token = cmListFileLexer_Scan(lexer)))
{
if(token->type == cmListFileLexer_Token_Newline)
{
haveNewline = true;
}
else if(token->type == cmListFileLexer_Token_Identifier)
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{
if(haveNewline)
{
haveNewline = false;
cmListFileFunction inFunction;
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inFunction.Name = token->text;
inFunction.FilePath = filename;
inFunction.Line = token->line;
if(cmListFileCacheParseFunction(lexer, inFunction, filename))
{
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this->Functions.push_back(inFunction);
}
else
{
parseError = true;
}
}
else
{
cmOStringStream error;
error << "Error in cmake code at\n"
<< filename << ":" << token->line << ":\n"
<< "Parse error. Expected a newline, got "
<< cmListFileLexer_GetTypeAsString(lexer, token->type)
<< " with text \"" << token->text << "\".";
cmSystemTools::Error(error.str().c_str());
parseError = true;
}
}
else
{
cmOStringStream error;
error << "Error in cmake code at\n"
<< filename << ":" << token->line << ":\n"
<< "Parse error. Expected a command name, got "
<< cmListFileLexer_GetTypeAsString(lexer, token->type)
<< " with text \""
<< token->text << "\".";
cmSystemTools::Error(error.str().c_str());
parseError = true;
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}
}
if (parseError)
{
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this->ModifiedTime = 0;
}
cmListFileLexer_Delete(lexer);
// do we need a cmake_policy(VERSION call?
if(topLevel)
{
bool hasVersion = false;
// search for the right policy command
for(std::vector<cmListFileFunction>::iterator i
= this->Functions.begin();
i != this->Functions.end(); ++i)
{
if (cmSystemTools::LowerCase(i->Name) == "cmake_minimum_required")
{
hasVersion = true;
break;
}
}
// if no policy command is found this is an error if they use any
// non advanced functions or a lot of functions
if(!hasVersion)
{
bool isProblem = true;
if (this->Functions.size() < 30)
{
// the list of simple commands DO NOT ADD TO THIS LIST!!!!!
// these commands must have backwards compatibility forever and
// and that is a lot longer than your tiny mind can comprehend mortal
std::set<std::string> allowedCommands;
allowedCommands.insert("project");
allowedCommands.insert("set");
allowedCommands.insert("if");
allowedCommands.insert("endif");
allowedCommands.insert("else");
allowedCommands.insert("elseif");
allowedCommands.insert("add_executable");
allowedCommands.insert("add_library");
allowedCommands.insert("target_link_libraries");
allowedCommands.insert("option");
allowedCommands.insert("message");
isProblem = false;
for(std::vector<cmListFileFunction>::iterator i
= this->Functions.begin();
i != this->Functions.end(); ++i)
{
std::string name = cmSystemTools::LowerCase(i->Name);
if (allowedCommands.find(name) == allowedCommands.end())
{
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isProblem = true;
break;
}
}
}
if (isProblem)
{
// Tell the top level cmMakefile to diagnose
// this violation of CMP0000.
mf->SetCheckCMP0000(true);
// Implicitly set the version for the user.
mf->SetPolicyVersion("2.4");
}
}
}
if(topLevel)
{
bool hasProject = false;
// search for a project command
for(std::vector<cmListFileFunction>::iterator i
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= this->Functions.begin();
i != this->Functions.end(); ++i)
{
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if(cmSystemTools::LowerCase(i->Name) == "project")
{
hasProject = true;
break;
}
}
// if no project command is found, add one
if(!hasProject)
{
cmListFileFunction project;
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project.Name = "PROJECT";
cmListFileArgument prj("Project", false, filename, 0);
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project.Arguments.push_back(prj);
this->Functions.insert(this->Functions.begin(),project);
}
}
if(parseError)
{
return false;
}
return true;
}
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bool cmListFileCacheParseFunction(cmListFileLexer* lexer,
cmListFileFunction& function,
const char* filename)
{
// Command name has already been parsed. Read the left paren.
cmListFileLexer_Token* token;
if(!(token = cmListFileLexer_Scan(lexer)))
{
cmOStringStream error;
error << "Error in cmake code at\n"
<< filename << ":" << cmListFileLexer_GetCurrentLine(lexer) << ":\n"
<< "Parse error. Function missing opening \"(\".";
cmSystemTools::Error(error.str().c_str());
return false;
}
if(token->type != cmListFileLexer_Token_ParenLeft)
{
cmOStringStream error;
error << "Error in cmake code at\n"
<< filename << ":" << cmListFileLexer_GetCurrentLine(lexer) << ":\n"
<< "Parse error. Expected \"(\", got "
<< cmListFileLexer_GetTypeAsString(lexer, token->type)
<< " with text \"" << token->text << "\".";
cmSystemTools::Error(error.str().c_str());
return false;
}
// Arguments.
unsigned long lastLine = cmListFileLexer_GetCurrentLine(lexer);
unsigned long parenDepth = 0;
while((token = cmListFileLexer_Scan(lexer)))
{
if(token->type == cmListFileLexer_Token_ParenLeft)
{
parenDepth++;
cmListFileArgument a("(",
false, filename, token->line);
function.Arguments.push_back(a);
}
else if(token->type == cmListFileLexer_Token_ParenRight)
{
if (parenDepth == 0)
{
return true;
}
parenDepth--;
cmListFileArgument a(")",
false, filename, token->line);
function.Arguments.push_back(a);
}
else if(token->type == cmListFileLexer_Token_Identifier ||
token->type == cmListFileLexer_Token_ArgumentUnquoted)
{
cmListFileArgument a(token->text,
false, filename, token->line);
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function.Arguments.push_back(a);
}
else if(token->type == cmListFileLexer_Token_ArgumentQuoted)
{
cmListFileArgument a(token->text,
true, filename, token->line);
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function.Arguments.push_back(a);
}
else if(token->type != cmListFileLexer_Token_Newline)
{
// Error.
cmOStringStream error;
error << "Error in cmake code at\n"
<< filename << ":" << cmListFileLexer_GetCurrentLine(lexer)
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<< ":\n"
<< "Parse error. Function missing ending \")\". "
<< "Instead found "
<< cmListFileLexer_GetTypeAsString(lexer, token->type)
<< " with text \"" << token->text << "\".";
cmSystemTools::Error(error.str().c_str());
return false;
}
lastLine = cmListFileLexer_GetCurrentLine(lexer);
}
cmOStringStream error;
error << "Error in cmake code at\n"
<< filename << ":" << lastLine << ":\n"
<< "Parse error. Function missing ending \")\". "
<< "End of file reached.";
cmSystemTools::Error(error.str().c_str());
return false;
}
//----------------------------------------------------------------------------
std::ostream& operator<<(std::ostream& os, cmListFileContext const& lfc)
{
os << lfc.FilePath;
if(lfc.Line)
{
os << ":" << lfc.Line;
if(!lfc.Name.empty())
{
os << " (" << lfc.Name << ")";
}
}
return os;
}