ENH: Implemented support for include/complain regular expressions for dependency scanning. This now includes the possibility that scanning will return failure and the build will stop.

Source/cmDepends.cxx

@@ -42,7 +42,7 @@ cmDepends::~cmDepends()
 }
 
 //----------------------------------------------------------------------------
-void cmDepends::Write()
+bool cmDepends::Write()
 {
   // Try to generate dependencies for the target file.
   cmGeneratedFileStream fout(m_DependsMakeFile.c_str());
@@ -52,6 +52,11 @@ void cmDepends::Write()
     // Dependencies were generated.  Touch the mark file.
     std::ofstream fmark(m_DependsMarkFile.c_str());
     fmark << "Dependencies updated for " << m_TargetFile.c_str() << std::endl;
+    return true;
+    }
+  else
+    {
+    return false;
     }
 }
 

Source/cmDepends.h

@@ -37,7 +37,7 @@ public:
   virtual ~cmDepends();
 
   /** Write dependencies for the target file.  */
-  void Write();
+  bool Write();
 
   /** Check dependencies for the target file.  */
   void Check();

Source/cmDependsC.cxx

@@ -23,18 +23,23 @@ cmDependsC::cmDependsC(const char* dir, const char* targetFile):
   cmDepends(dir, targetFile),
   m_SourceFile(),
   m_IncludePath(0),
-  m_IncludeLineRegex()
+  m_IncludeRegexLine(),
+  m_IncludeRegexScan(),
+  m_IncludeRegexComplain()
 {
 }
 
 //----------------------------------------------------------------------------
 cmDependsC::cmDependsC(const char* dir, const char* targetFile,
                        const char* sourceFile,
-                       std::vector<std::string> const& includes):
+                       std::vector<std::string> const& includes,
+                       const char* scanRegex, const char* complainRegex):
   cmDepends(dir, targetFile),
   m_SourceFile(sourceFile),
   m_IncludePath(&includes),
-  m_IncludeLineRegex("^[ \t]*#[ \t]*include[ \t]*[<\"]([^\">]+)[\">]")
+  m_IncludeRegexLine("^[ \t]*#[ \t]*include[ \t]*[<\"]([^\">]+)[\">]"),
+  m_IncludeRegexScan(scanRegex),
+  m_IncludeRegexComplain(complainRegex)
 {
 }
 
@@ -61,6 +66,7 @@ bool cmDependsC::WriteDependencies(std::ostream& os)
   // Walk the dependency graph starting with the source file.
   bool first = true;
   m_Unscanned.push(m_SourceFile);
+  m_Encountered.clear();
   m_Encountered.insert(m_SourceFile);
   std::set<cmStdString> dependencies;
   std::set<cmStdString> scanned;
@@ -74,7 +80,10 @@ bool cmDependsC::WriteDependencies(std::ostream& os)
     std::string fullName;
     if(first || cmSystemTools::FileIsFullPath(fname.c_str()))
       {
-      fullName = fname;
+      if(cmSystemTools::FileExists(fname.c_str()))
+        {
+        fullName = fname;
+        }
       }
     else
       {
@@ -92,8 +101,16 @@ bool cmDependsC::WriteDependencies(std::ostream& os)
         }
       }
 
+    // Complain if the file cannot be found and matches the complain
+    // regex.
+    if(fullName.empty() && m_IncludeRegexComplain.find(fname.c_str()))
+      {
+      cmSystemTools::Error("Cannot find file \"", fname.c_str(), "\".");
+      return false;
+      }
+
     // Scan the file if it was found and has not been scanned already.
-    if(fullName.size() && (scanned.find(fullName) == scanned.end()))
+    if(!fullName.empty() && (scanned.find(fullName) == scanned.end()))
       {
       // Record scanned files.
       scanned.insert(fullName);
@@ -113,7 +130,6 @@ bool cmDependsC::WriteDependencies(std::ostream& os)
 
     first = false;
     }
-  m_Encountered.clear();
 
   // Write the dependencies to the output stream.
   for(std::set<cmStdString>::iterator i=dependencies.begin();
@@ -228,16 +244,16 @@ void cmDependsC::Scan(std::istream& is)
   std::string line;
   while(cmSystemTools::GetLineFromStream(is, line))
     {
-    // Match include directives.  TODO: Support include regex and
+    // Match include directives.
-    // ignore regex.  Possibly also support directory-based inclusion
+    if(m_IncludeRegexLine.find(line.c_str()))
-    // in dependencies.
-    if(m_IncludeLineRegex.find(line.c_str()))
       {
       // Get the file being included.
-      std::string includeFile = m_IncludeLineRegex.match(1);
+      std::string includeFile = m_IncludeRegexLine.match(1);
 
-      // Queue the file if it has not yet been encountered.
+      // Queue the file if it has not yet been encountered and it
-      if(m_Encountered.find(includeFile) == m_Encountered.end())
+      // matches the regular expression for recursive scanning.
+      if(m_Encountered.find(includeFile) == m_Encountered.end() &&
+         m_IncludeRegexScan.find(includeFile.c_str()))
         {
         m_Encountered.insert(includeFile);
         m_Unscanned.push(includeFile);

Source/cmDependsC.h

@@ -34,9 +34,10 @@ public:
   /** Scanning need to know the build directory name, the relative
       path from the build directory to the target file, the source
       file from which to start scanning, and the include file search
-      path.  */
+      path.  It also uses the include file regular expressions.  */
   cmDependsC(const char* dir, const char* targetFile,
-             const char* sourceFile, std::vector<std::string> const& includes);
+             const char* sourceFile, std::vector<std::string> const& includes,
+             const char* scanRegex, const char* complainRegex);
 
   /** Virtual destructor to cleanup subclasses properly.  */
   virtual ~cmDependsC();
@@ -56,7 +57,12 @@ protected:
   std::vector<std::string> const* m_IncludePath;
 
   // Regular expression to identify C preprocessor include directives.
-  cmsys::RegularExpression m_IncludeLineRegex;
+  cmsys::RegularExpression m_IncludeRegexLine;
+
+  // Regular expressions to choose which include files to scan
+  // recursively and which to complain about not finding.
+  cmsys::RegularExpression m_IncludeRegexScan;
+  cmsys::RegularExpression m_IncludeRegexComplain;
 
   // Data structures for dependency graph walk.
   std::set<cmStdString> m_Encountered;

Source/cmLocalUnixMakefileGenerator2.cxx

@@ -234,6 +234,7 @@ void cmLocalUnixMakefileGenerator2::GenerateCMakefile()
     << "SET(CMAKE_MAKEFILE_OUTPUTS\n"
     << "  \"" << this->ConvertToRelativePath(makefileName.c_str()).c_str() << "\"\n"
     << "  \"" << this->ConvertToRelativePath(check.c_str()).c_str() << "\"\n"
+    << "  \"CMakeDirectoryInformation.cmake\"\n"
     << "  )\n\n";
 
   // Set the set of files to check for dependency integrity.
@@ -525,8 +526,7 @@ cmLocalUnixMakefileGenerator2
   // touch the corresponding depends file after scanning dependencies.
   cmOStringStream depCmd;
   // TODO: Account for source file properties and directory-level
-  // definitions when scanning for dependencies.  Also account for
+  // definitions when scanning for dependencies.
-  // include/ignore regular expressions.
   depCmd << "$(CMAKE_COMMAND) -E cmake_depends " << lang << " "
          << this->ConvertToRelativeOutputPath(obj.c_str()) << " "
          << this->ConvertToRelativeOutputPath(source.GetFullPath().c_str());
@@ -2854,20 +2854,41 @@ cmLocalUnixMakefileGenerator2
       }
     }
 
+  // Get the include file regular expression.
+  std::string includeRegexScan = "^.*$";
+  std::string includeRegexComplain = "^$";
+  if(haveDirectoryInfo)
+    {
+    std::string scanRegexVar = "CMAKE_";
+    scanRegexVar += lang;
+    scanRegexVar += "_INCLUDE_REGEX_SCAN";
+    if(const char* scanRegex = mf->GetDefinition(scanRegexVar.c_str()))
+      {
+      includeRegexScan = scanRegex;
+      }
+    std::string complainRegexVar = "CMAKE_";
+    complainRegexVar += lang;
+    complainRegexVar += "_INCLUDE_REGEX_COMPLAIN";
+    if(const char* complainRegex = mf->GetDefinition(complainRegexVar.c_str()))
+      {
+      includeRegexComplain = complainRegex;
+      }
+    }
+
   // Dispatch the scan for each language.
   if(lang == "C" || lang == "CXX" || lang == "RC")
     {
     // TODO: Handle RC (resource files) dependencies correctly.
-    cmDependsC scanner(".", objFile, srcFile, includes);
+    cmDependsC scanner(".", objFile, srcFile, includes,
-    scanner.Write();
+                       includeRegexScan.c_str(), includeRegexComplain.c_str());
-    return true;
+    return scanner.Write();
+    true;
     }
 #ifdef CMAKE_BUILD_WITH_CMAKE
   else if(lang == "Fortran")
     {
     cmDependsFortran scanner(".", objFile, srcFile, includes);
-    scanner.Write();
+    return scanner.Write();
-    return true;
     }
 #endif
   return false;