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cmake/Source/cmMakeDepend.cxx

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9.4 KiB

/*=========================================================================
Program: CMake - Cross-Platform Makefile Generator
Module: $RCSfile: cmMakeDepend.cxx,v $
Language: C++
Date: $Date: 2009-03-23 17:58:48 $
Version: $Revision: 1.46.2.1 $
Copyright (c) 2002 Kitware, Inc., Insight Consortium. All rights reserved.
See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#include "cmMakeDepend.h"
#include "cmSystemTools.h"
#include <cmsys/RegularExpression.hxx>
void cmDependInformation::AddDependencies(cmDependInformation* info)
{
if(this != info)
{
this->DependencySet.insert(info);
}
}
cmMakeDepend::cmMakeDepend()
{
this->Verbose = false;
this->IncludeFileRegularExpression.compile("^.*$");
this->ComplainFileRegularExpression.compile("^$");
}
cmMakeDepend::~cmMakeDepend()
{
for(DependInformationMapType::iterator i =
this->DependInformationMap.begin();
i != this->DependInformationMap.end(); ++i)
{
delete i->second;
}
}
// Set the makefile that depends will be made from.
// The pointer is kept so the cmSourceFile array can
// be updated with the depend information in the cmMakefile.
void cmMakeDepend::SetMakefile(cmMakefile* makefile)
{
this->Makefile = makefile;
// Now extract the include file regular expression from the makefile.
this->IncludeFileRegularExpression.compile(
this->Makefile->IncludeFileRegularExpression.c_str());
this->ComplainFileRegularExpression.compile(
this->Makefile->ComplainFileRegularExpression.c_str());
// Now extract any include paths from the makefile flags
const std::vector<std::string>& includes =
this->Makefile->GetIncludeDirectories();
for(std::vector<std::string>::const_iterator j = includes.begin();
j != includes.end(); ++j)
{
std::string path = *j;
this->Makefile->ExpandVariablesInString(path);
this->AddSearchPath(path.c_str());
}
}
const cmDependInformation* cmMakeDepend::FindDependencies(const char* file)
{
cmDependInformation* info = this->GetDependInformation(file,0);
this->GenerateDependInformation(info);
return info;
}
void cmMakeDepend::GenerateDependInformation(cmDependInformation* info)
{
// If dependencies are already done, stop now.
if(info->DependDone)
{
return;
}
else
{
// Make sure we don't visit the same file more than once.
info->DependDone = true;
}
const char* path = info->FullPath.c_str();
if(!path)
{
cmSystemTools::Error(
"Attempt to find dependencies for file without path!");
return;
}
bool found = false;
// If the file exists, use it to find dependency information.
if(cmSystemTools::FileExists(path, true))
{
// Use the real file to find its dependencies.
this->DependWalk(info);
found = true;
}
// See if the cmSourceFile for it has any files specified as
// dependency hints.
if(info->SourceFile != 0)
{
// Get the cmSourceFile corresponding to this.
const cmSourceFile& cFile = *(info->SourceFile);
// See if there are any hints for finding dependencies for the missing
// file.
if(!cFile.GetDepends().empty())
{
// Dependency hints have been given. Use them to begin the
// recursion.
for(std::vector<std::string>::const_iterator file =
cFile.GetDepends().begin(); file != cFile.GetDepends().end();
++file)
{
this->AddDependency(info, file->c_str());
}
// Found dependency information. We are done.
found = true;
}
}
if(!found)
{
// Try to find the file amongst the sources
cmSourceFile *srcFile = this->Makefile->GetSource
(cmSystemTools::GetFilenameWithoutExtension(path).c_str());
if (srcFile)
{
if (srcFile->GetFullPath() == path)
{
found=true;
}
else
{
//try to guess which include path to use
for(std::vector<std::string>::iterator t =
this->IncludeDirectories.begin();
t != this->IncludeDirectories.end(); ++t)
{
std::string incpath = *t;
if (incpath.size() && incpath[incpath.size() - 1] != '/')
{
incpath = incpath + "/";
}
incpath = incpath + path;
if (srcFile->GetFullPath() == incpath)
{
// set the path to the guessed path
info->FullPath = incpath;
found=true;
}
}
}
}
}
if(!found)
{
// Couldn't find any dependency information.
if(this->ComplainFileRegularExpression.find(info->IncludeName.c_str()))
{
cmSystemTools::Error("error cannot find dependencies for ", path);
}
else
{
// Destroy the name of the file so that it won't be output as a
// dependency.
info->FullPath = "";
}
}
}
// This function actually reads the file specified and scans it for
// #include directives
void cmMakeDepend::DependWalk(cmDependInformation* info)
{
cmsys::RegularExpression includeLine
("^[ \t]*#[ \t]*include[ \t]*[<\"]([^\">]+)[\">]");
std::ifstream fin(info->FullPath.c_str());
if(!fin)
{
cmSystemTools::Error("Cannot open ", info->FullPath.c_str());
return;
}
// TODO: Write real read loop (see cmSystemTools::CopyFile).
std::string line;
while( cmSystemTools::GetLineFromStream(fin, line) )
{
if(includeLine.find(line.c_str()))
{
// extract the file being included
std::string includeFile = includeLine.match(1);
// see if the include matches the regular expression
if(!this->IncludeFileRegularExpression.find(includeFile))
{
if(this->Verbose)
{
std::string message = "Skipping ";
message += includeFile;
message += " for file ";
message += info->FullPath.c_str();
cmSystemTools::Error(message.c_str(), 0);
}
continue;
}
// Add this file and all its dependencies.
this->AddDependency(info, includeFile.c_str());
}
}
}
void cmMakeDepend::AddDependency(cmDependInformation* info, const char* file)
{
cmDependInformation* dependInfo =
this->GetDependInformation(file, info->PathOnly.c_str());
this->GenerateDependInformation(dependInfo);
info->AddDependencies(dependInfo);
}
cmDependInformation* cmMakeDepend::GetDependInformation(const char* file,
const char *extraPath)
{
// Get the full path for the file so that lookup is unambiguous.
std::string fullPath = this->FullPath(file, extraPath);
// Try to find the file's instance of cmDependInformation.
DependInformationMapType::const_iterator result =
this->DependInformationMap.find(fullPath);
if(result != this->DependInformationMap.end())
{
// Found an instance, return it.
return result->second;
}
else
{
// Didn't find an instance. Create a new one and save it.
cmDependInformation* info = new cmDependInformation;
info->FullPath = fullPath;
info->PathOnly = cmSystemTools::GetFilenamePath(fullPath.c_str());
info->IncludeName = file;
this->DependInformationMap[fullPath] = info;
return info;
}
}
// find the full path to fname by searching the this->IncludeDirectories array
std::string cmMakeDepend::FullPath(const char* fname, const char *extraPath)
{
DirectoryToFileToPathMapType::iterator m;
if(extraPath)
{
m = this->DirectoryToFileToPathMap.find(extraPath);
}
else
{
m = this->DirectoryToFileToPathMap.find("");
}
if(m != this->DirectoryToFileToPathMap.end())
{
FileToPathMapType& map = m->second;
FileToPathMapType::iterator p = map.find(fname);
if(p != map.end())
{
return p->second;
}
}
if(cmSystemTools::FileExists(fname, true))
{
std::string fp = cmSystemTools::CollapseFullPath(fname);
this->DirectoryToFileToPathMap[extraPath? extraPath: ""][fname] = fp;
return fp;
}
for(std::vector<std::string>::iterator i = this->IncludeDirectories.begin();
i != this->IncludeDirectories.end(); ++i)
{
std::string path = *i;
if (path.size() && path[path.size() - 1] != '/')
{
path = path + "/";
}
path = path + fname;
if(cmSystemTools::FileExists(path.c_str(), true)
&& !cmSystemTools::FileIsDirectory(path.c_str()))
{
std::string fp = cmSystemTools::CollapseFullPath(path.c_str());
this->DirectoryToFileToPathMap[extraPath? extraPath: ""][fname] = fp;
return fp;
}
}
if (extraPath)
{
std::string path = extraPath;
if (path.size() && path[path.size() - 1] != '/')
{
path = path + "/";
}
path = path + fname;
if(cmSystemTools::FileExists(path.c_str(), true)
&& !cmSystemTools::FileIsDirectory(path.c_str()))
{
std::string fp = cmSystemTools::CollapseFullPath(path.c_str());
this->DirectoryToFileToPathMap[extraPath][fname] = fp;
return fp;
}
}
// Couldn't find the file.
return std::string(fname);
}
// Add a directory to the search path
void cmMakeDepend::AddSearchPath(const char* path)
{
this->IncludeDirectories.push_back(path);
}