bug_674442 CREATE_FOLDERS should not create unused folders

Also known as issue #4672

The folders are still created but in case the folders are empty after the doxygen run the directories are removed.

src/dir.cpp

@@ -200,6 +200,13 @@ bool Dir::exists() const
   return fi.exists() && fi.isDir();
 }
 
+bool Dir::isEmpty(const std::string subdir) const
+{
+  fs::path pth = path();
+  pth /= subdir;
+  return fs::is_empty(pth);
+}
+
 bool Dir::isRelative() const
 {
   return isRelativePath(p->path.string());

src/dir.h

@@ -78,6 +78,7 @@ class Dir final
 
     DirIterator iterator() const;
 
+    bool Dir::isEmpty(const std::string subdir) const;
     bool exists() const;
     std::string filePath(const std::string &path,bool acceptsAbsPath=true) const;
     bool exists(const std::string &path,bool acceptsAbsPath=true) const;

src/docbookgen.cpp

@@ -313,6 +313,13 @@ void DocbookGenerator::init()
 
   createSubDirs(d);
 }
+void DocbookGenerator::cleanup()
+{
+  QCString dname = Config_getString(DOCBOOK_OUTPUT);
+  Dir d(dname.str());
+  clearSubDirs(d);
+}
+
 
 void DocbookGenerator::startFile(const QCString &name,const QCString &,const QCString &,int)
 {

src/docbookgen.h

@@ -99,6 +99,7 @@ class DocbookGenerator : public OutputGenerator
     virtual std::unique_ptr<OutputGenerator> clone() const;
 
     static void init();
+    void cleanup();
 
     OutputType type() const { return Docbook; }
 

src/doxygen.cpp

@@ -12144,6 +12144,8 @@ void generateOutput()
     g_s.end();
   }
 
+  g_outputList->cleanup();
+
   int cacheParam;
   msg("lookup cache used %zu/%zu hits=%" PRIu64 " misses=%" PRIu64 "\n",
       Doxygen::lookupCache->size(),

src/htmlgen.cpp

@@ -971,6 +971,7 @@ void HtmlGenerator::init()
   {
     mgr.copyResource("svgpan.js",dname);
   }
+
   if (!Config_getBool(DISABLE_INDEX) && Config_getBool(HTML_DYNAMIC_MENUS))
   {
     mgr.copyResource("menu.js",dname);
@@ -990,6 +991,13 @@ void HtmlGenerator::init()
   }
 }
 
+void HtmlGenerator::cleanup()
+{
+  QCString dname = Config_getString(HTML_OUTPUT);
+  Dir d(dname.str());
+  clearSubDirs(d);
+}
+
 /// Additional initialization after indices have been created
 void HtmlGenerator::writeTabData()
 {

src/htmlgen.h

@@ -73,6 +73,7 @@ class HtmlGenerator : public OutputGenerator
 
     virtual OutputType type() const { return Html; }
     static void init();
+    void cleanup();
     static void writeStyleSheetFile(TextStream &t);
     static void writeHeaderFile(TextStream &t, const QCString &cssname);
     static void writeFooterFile(TextStream &t);

src/latexgen.cpp

@@ -494,6 +494,13 @@ void LatexGenerator::init()
   createSubDirs(d);
 }
 
+void LatexGenerator::cleanup()
+{
+  QCString dname = Config_getString(LATEX_OUTPUT);
+  Dir d(dname.str());
+  clearSubDirs(d);
+}
+
 static void writeDefaultStyleSheet(TextStream &t)
 {
   t << ResourceMgr::instance().getAsString("doxygen.sty");

src/latexgen.h

@@ -86,6 +86,7 @@ class LatexGenerator : public OutputGenerator
     virtual std::unique_ptr<OutputGenerator> clone() const;
 
     static void init();
+    void cleanup();
     static void writeStyleSheetFile(TextStream &t);
     static void writeHeaderFile(TextStream &t);
     static void writeFooterFile(TextStream &t);

src/mangen.cpp

@@ -115,6 +115,13 @@ void ManGenerator::init()
   createSubDirs(d);
 }
 
+void ManGenerator::cleanup()
+{
+  QCString dname = Config_getString(MAN_OUTPUT);
+  Dir d(dname.str());
+  clearSubDirs(d);
+}
+
 static QCString buildFileName(const QCString &name)
 {
   QCString fileName;

src/mangen.h

@@ -35,6 +35,7 @@ class ManGenerator : public OutputGenerator
     void writeDoc(DocNode *,const Definition *,const MemberDef *,int);
 
     static void init();
+    void cleanup();
     void startFile(const QCString &name,const QCString &manName,const QCString &title,int);
     void writeSearchInfo() {}
     void writeFooter(const QCString &) {}

src/outputgen.h

@@ -497,6 +497,8 @@ class OutputGenerator : public BaseOutputDocInterface
     virtual void writeLabel(const QCString &,bool) = 0;
     virtual void endLabels() = 0;
 
+    virtual void cleanup() = 0;
+
   protected:
     TextStream m_t;
   private:

src/outputlist.h

@@ -475,6 +475,9 @@ class OutputList : public OutputDocInterface
     void endLabels()
     { forall(&OutputGenerator::endLabels); }
 
+    void cleanup()
+    { forall(&OutputGenerator::cleanup); }
+
     void startFontClass(const QCString &c)
     { forall(&OutputGenerator::startFontClass,c); }
     void endFontClass()

src/rtfgen.cpp

@@ -207,6 +207,13 @@ void RTFGenerator::init()
   createSubDirs(d);
 }
 
+void RTFGenerator::cleanup()
+{
+  QCString dname = Config_getString(RTF_OUTPUT);
+  Dir d(dname.str());
+  clearSubDirs(d);
+}
+
 static QCString makeIndexName(const QCString &s,int i)
 {
   QCString result=s;

src/rtfgen.h

@@ -32,6 +32,7 @@ class RTFGenerator : public OutputGenerator
     virtual std::unique_ptr<OutputGenerator> clone() const;
 
     static void init();
+    void cleanup();
     static void writeStyleSheetFile(TextStream &t);
     static void writeExtensionsFile(TextStream &t);
     OutputType type() const { return RTF; }

src/util.cpp

@@ -3702,6 +3702,32 @@ void createSubDirs(const Dir &d)
   }
 }
 
+void clearSubDirs(const Dir &d)
+{
+  if (Config_getBool(CREATE_SUBDIRS))
+  {
+    // remove empty subdirectories
+    for (int l1=0;l1<16;l1++)
+    {
+      QCString subdir;
+      subdir.sprintf("d%x",l1);
+      for (int l2=0;l2<256;l2++)
+      {
+        QCString subsubdir;
+        subsubdir.sprintf("d%x/d%02x",l1,l2);
+        if (d.exists(subsubdir.str()) && d.isEmpty(subsubdir.str()))
+        {
+          d.rmdir(subsubdir.str());
+        }
+      }
+      if (d.exists(subdir.str()) && d.isEmpty(subdir.str()))
+      {
+        d.rmdir(subdir.str());
+      }
+    }
+  }
+}
+
 /*! Input is a scopeName, output is the scopename split into a
  *  namespace part (as large as possible) and a classname part.
  */

src/util.h

@@ -321,6 +321,7 @@ void addDirPrefix(QCString &fileName);
 QCString relativePathToRoot(const QCString &name);
 
 void createSubDirs(const Dir &d);
+void clearSubDirs(const Dir &d);
 
 QCString stripPath(const QCString &s);
 

src/xmlgen.cpp

@@ -2021,6 +2021,7 @@ void generateXML()
   }
 
   writeCombineScript();
+  clearSubDirs(xmlDir);
 }