CMake/Source/cmMakeDepend.cxx

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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile$
Language: C++
Date: $Date$
Version: $Revision$
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Copyright (c) 2002 Insight Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm 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 above copyright notices for more information.
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=========================================================================*/
#include "cmMakeDepend.h"
#include "cmStandardIncludes.h"
#include "cmSystemTools.h"
void cmDependInformation::AddDependencies(cmDependInformation* info)
{
if(this != info)
{
m_DependencySet.insert(info);
for (cmDependInformation::DependencySet::const_iterator
d = info->m_DependencySet.begin();
d != info->m_DependencySet.end(); ++d)
{
m_DependencySet.insert(*d);
}
}
}
cmMakeDepend::cmMakeDepend()
{
m_Verbose = false;
m_IncludeFileRegularExpression.compile("^.*$");
m_ComplainFileRegularExpression.compile("^$");
}
cmMakeDepend::~cmMakeDepend()
{
for(DependInformationMap::iterator i = m_DependInformationMap.begin();
i != m_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(const cmMakefile* makefile)
{
m_Makefile = makefile;
// Now extract the include file regular expression from the makefile.
m_IncludeFileRegularExpression.compile(
m_Makefile->m_IncludeFileRegularExpression.c_str());
m_ComplainFileRegularExpression.compile(
m_Makefile->m_ComplainFileRegularExpression.c_str());
// Now extract any include paths from the makefile flags
const std::vector<std::string>& includes =
m_Makefile->GetIncludeDirectories();
for(std::vector<std::string>::const_iterator j = includes.begin();
j != includes.end(); ++j)
{
std::string path = *j;
m_Makefile->ExpandVariablesInString(path);
this->AddSearchPath(path.c_str());
}
}
const cmDependInformation* cmMakeDepend::FindDependencies(const char* file)
{
cmDependInformation* info = this->GetDependInformation(file,NULL);
this->GenerateDependInformation(info);
return info;
}
void cmMakeDepend::GenerateDependInformation(cmDependInformation* info)
{
// If dependencies are already done, stop now.
if(info->m_DependDone)
{
return;
}
else
{
// Make sure we don't visit the same file more than once.
info->m_DependDone = true;
}
const char* path = info->m_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))
{
// 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->m_cmSourceFile != 0)
{
// Get the cmSourceFile corresponding to this.
const cmSourceFile& cFile = *(info->m_cmSourceFile);
// See if there are any hints for finding dependencies for the missing
// file.
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if(!cFile.GetDepends().empty())
{
// Dependency hints have been given. Use them to begin the
// recursion.
for(std::vector<std::string>::const_iterator file =
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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 =
m_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 =
m_IncludeDirectories.begin();
t != m_IncludeDirectories.end(); ++t)
{
std::string incpath = *t;
incpath = incpath + "/";
incpath = incpath + path;
if (srcFile->GetFullPath() == incpath)
{
// set the path to the guessed path
info->m_FullPath = incpath;
found=true;
}
}
}
}
}
if(!found)
{
// Couldn't find any dependency information.
if(m_ComplainFileRegularExpression.find(info->m_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->m_FullPath = "";
}
}
}
// This function actually reads the file specified and scans it for
// #include directives
void cmMakeDepend::DependWalk(cmDependInformation* info)
{
cmRegularExpression includeLine("^[ \t]*#[ \t]*include[ \t]*[<\"]([^\">]+)[\">]");
std::ifstream fin(info->m_FullPath.c_str());
if(!fin)
{
cmSystemTools::Error("Cannot open ", info->m_FullPath.c_str());
return;
}
// TODO: Write real read loop (see cmSystemTools::CopyFile).
char line[255];
for(fin.getline(line, 255); fin; fin.getline(line, 255))
{
if(includeLine.find(line))
{
// extract the file being included
std::string includeFile = includeLine.match(1);
// see if the include matches the regular expression
if(!m_IncludeFileRegularExpression.find(includeFile))
{
if(m_Verbose)
{
std::string message = "Skipping ";
message += includeFile;
message += " for file ";
message += info->m_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,
cmSystemTools::GetFilenamePath(
cmSystemTools::CollapseFullPath(
info->m_FullPath.c_str())).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.
DependInformationMap::const_iterator result =
m_DependInformationMap.find(fullPath);
if(result != m_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->m_FullPath = fullPath;
info->m_IncludeName = file;
m_DependInformationMap[fullPath] = info;
return info;
}
}
void cmMakeDepend::GenerateMakefileDependencies()
{
// Now create cmDependInformation objects for files in the directory
const cmTargets &tgts = m_Makefile->GetTargets();
for(cmTargets::const_iterator l = tgts.begin();
l != tgts.end(); l++)
{
const std::vector<cmSourceFile*> &classes = l->second.GetSourceFiles();
for(std::vector<cmSourceFile*>::const_iterator i = classes.begin();
i != classes.end(); ++i)
{
if(!(*i)->GetPropertyAsBool("HEADER_FILE_ONLY"))
{
cmDependInformation* info =
this->GetDependInformation((*i)->GetFullPath().c_str(),NULL);
this->AddFileToSearchPath(info->m_FullPath.c_str());
info->m_cmSourceFile = *i;
this->GenerateDependInformation(info);
}
}
}
}
// find the full path to fname by searching the m_IncludeDirectories array
std::string cmMakeDepend::FullPath(const char* fname, const char *extraPath)
{
if(cmSystemTools::FileExists(fname))
{
return std::string(cmSystemTools::CollapseFullPath(fname));
}
for(std::vector<std::string>::iterator i = m_IncludeDirectories.begin();
i != m_IncludeDirectories.end(); ++i)
{
std::string path = *i;
path = path + "/";
path = path + fname;
if(cmSystemTools::FileExists(path.c_str()))
{
return cmSystemTools::CollapseFullPath(path.c_str());
}
}
if (extraPath)
{
std::string path = extraPath;
path = path + "/";
path = path + fname;
if(cmSystemTools::FileExists(path.c_str()))
{
return cmSystemTools::CollapseFullPath(path.c_str());
}
}
// Couldn't find the file.
return std::string(fname);
}
// Add a directory to the search path
void cmMakeDepend::AddSearchPath(const char* path)
{
m_IncludeDirectories.push_back(path);
}
// Add a directory to the search path
void cmMakeDepend::AddFileToSearchPath(const char* file)
{
std::string filepath = file;
std::string::size_type pos = filepath.rfind('/');
if(pos != std::string::npos)
{
std::string path = filepath.substr(0, pos);
if(std::find(m_IncludeDirectories.begin(),
m_IncludeDirectories.end(), path)
== m_IncludeDirectories.end())
{
m_IncludeDirectories.push_back(path);
return;
}
}
}
const cmDependInformation*
cmMakeDepend::GetDependInformationForSourceFile(const cmSourceFile &sf) const
{
for(DependInformationMap::const_iterator i = m_DependInformationMap.begin();
i != m_DependInformationMap.end(); ++i)
{
const cmDependInformation* info = i->second;
if(info->m_cmSourceFile == &sf)
{
return info;
}
}
return 0;
}