From f366804a95c02d0883a3a1598a0f93b4ee0c982c Mon Sep 17 00:00:00 2001
From: albert-github <albert.tests@gmail.com>
Date: Sat, 12 Jun 2021 14:40:44 +0200
Subject: 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        |  7 +++++++
 src/dir.h          |  1 +
 src/docbookgen.cpp |  7 +++++++
 src/docbookgen.h   |  1 +
 src/doxygen.cpp    |  2 ++
 src/htmlgen.cpp    |  8 ++++++++
 src/htmlgen.h      |  1 +
 src/latexgen.cpp   |  7 +++++++
 src/latexgen.h     |  1 +
 src/mangen.cpp     |  7 +++++++
 src/mangen.h       |  1 +
 src/outputgen.h    |  2 ++
 src/outputlist.h   |  3 +++
 src/rtfgen.cpp     |  7 +++++++
 src/rtfgen.h       |  1 +
 src/util.cpp       | 26 ++++++++++++++++++++++++++
 src/util.h         |  1 +
 src/xmlgen.cpp     |  1 +
 18 files changed, 84 insertions(+)

diff --git a/src/dir.cpp b/src/dir.cpp
index 327bc72..8a30f31 100644
--- a/src/dir.cpp
+++ b/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());
diff --git a/src/dir.h b/src/dir.h
index 0a1cc12..c322669 100644
--- a/src/dir.h
+++ b/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;
diff --git a/src/docbookgen.cpp b/src/docbookgen.cpp
index ab2fb84..38d1141 100644
--- a/src/docbookgen.cpp
+++ b/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)
 {
diff --git a/src/docbookgen.h b/src/docbookgen.h
index aba1527..f2c00bf 100644
--- a/src/docbookgen.h
+++ b/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; }
 
diff --git a/src/doxygen.cpp b/src/doxygen.cpp
index a54be26..1287f9b 100644
--- a/src/doxygen.cpp
+++ b/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(),
diff --git a/src/htmlgen.cpp b/src/htmlgen.cpp
index e1547af..484d6a7 100644
--- a/src/htmlgen.cpp
+++ b/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()
 {
diff --git a/src/htmlgen.h b/src/htmlgen.h
index c66e622..5665e8a 100644
--- a/src/htmlgen.h
+++ b/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);
diff --git a/src/latexgen.cpp b/src/latexgen.cpp
index fdcb993..0e86fb0 100644
--- a/src/latexgen.cpp
+++ b/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");
diff --git a/src/latexgen.h b/src/latexgen.h
index f457d79..f3c1ab4 100644
--- a/src/latexgen.h
+++ b/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);
diff --git a/src/mangen.cpp b/src/mangen.cpp
index 05c5e77..50ba608 100644
--- a/src/mangen.cpp
+++ b/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;
diff --git a/src/mangen.h b/src/mangen.h
index c552580..67b3356 100644
--- a/src/mangen.h
+++ b/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 &) {}
diff --git a/src/outputgen.h b/src/outputgen.h
index 53972d4..74df36b 100644
--- a/src/outputgen.h
+++ b/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:
diff --git a/src/outputlist.h b/src/outputlist.h
index eadf85f..1c66921 100644
--- a/src/outputlist.h
+++ b/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()
diff --git a/src/rtfgen.cpp b/src/rtfgen.cpp
index 0fac0b4..d500f27 100644
--- a/src/rtfgen.cpp
+++ b/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;
diff --git a/src/rtfgen.h b/src/rtfgen.h
index c9a069e..7411023 100644
--- a/src/rtfgen.h
+++ b/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; }
diff --git a/src/util.cpp b/src/util.cpp
index 37c5e62..7c469ab 100644
--- a/src/util.cpp
+++ b/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.
  */
diff --git a/src/util.h b/src/util.h
index 4dc02d0..a166a21 100644
--- a/src/util.h
+++ b/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);
 
diff --git a/src/xmlgen.cpp b/src/xmlgen.cpp
index 46b0084..7fd7c6b 100644
--- a/src/xmlgen.cpp
+++ b/src/xmlgen.cpp
@@ -2021,6 +2021,7 @@ void generateXML()
   }
 
   writeCombineScript();
+  clearSubDirs(xmlDir);
 }
 
 
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