Write out used settings when generating XML output

When generating XML output is is afterwards unknown which settings have been used to generate the XML output, e.g. whether `EXTRACT_PRIVATE` was set or not as the XML output tries to write out all information contained in the sources and not to limit it.
By writing out a Doxyfile.xml with all the used settings this can be overcome.

4 files changed, 150 insertions, 18 deletions

diff --git a/src/config.h b/src/config.h
index f3fd278..6d74817 100644
--- a/src/config.h
+++ b/src/config.h
@@ -61,6 +61,11 @@ namespace Config
    */
   void compareDoxyfile(std::ostream &t);
 
+  /*! Writes a the used settings of the current configuartion as XML format
+   *  to stream \a t.
+   */
+  void writeXMLDoxyfile(std::ostream &t);
+
   /*! Parses a configuration file with name \a fn.
    *  \returns TRUE if successful, FALSE if the file could not be
    *  opened or read.
diff --git a/src/configimpl.h b/src/configimpl.h
index 2a124f8..cfebcee 100644
--- a/src/configimpl.h
+++ b/src/configimpl.h
@@ -77,14 +77,16 @@ class ConfigOption
   protected:
     virtual void writeTemplate(std::ostream &t,bool sl,bool upd) = 0;
     virtual void compareDoxyfile(std::ostream &t) = 0;
+    virtual void writeXMLDoxyfile(std::ostream &t) = 0;
     virtual void convertStrToVal() {}
     virtual void emptyValueToDefault() {}
     virtual void substEnvVars() = 0;
     virtual void init() {}
+    virtual bool isDefault() {return true;}
 
-    void writeBoolValue(std::ostream &t,bool v);
-    void writeIntValue(std::ostream &t,int i);
-    void writeStringValue(std::ostream &t,const QCString &s);
+    void writeBoolValue(std::ostream &t,bool v,bool initSpace = true);
+    void writeIntValue(std::ostream &t,int i,bool initSpace = true);
+    void writeStringValue(std::ostream &t,const QCString &s,bool initSpace = true);
     void writeStringList(std::ostream &t,const StringVector &l);
 
     QCString m_spaces;
@@ -109,6 +111,7 @@ class ConfigInfo : public ConfigOption
     }
     void writeTemplate(std::ostream &t, bool sl,bool);
     void compareDoxyfile(std::ostream &){};
+    void writeXMLDoxyfile(std::ostream &) {};
     void substEnvVars() {}
 };
 
@@ -132,8 +135,10 @@ class ConfigList : public ConfigOption
     StringVector getDefault() { return m_defaultValue; }
     void writeTemplate(std::ostream &t,bool sl,bool);
     void compareDoxyfile(std::ostream &t);
+    void writeXMLDoxyfile(std::ostream &t);
     void substEnvVars();
     void init() { m_value = m_defaultValue; }
+    bool isDefault();
   private:
     StringVector m_value;
     StringVector m_defaultValue;
@@ -160,7 +165,9 @@ class ConfigEnum : public ConfigOption
     void writeTemplate(std::ostream &t,bool sl,bool);
     void convertStrToVal();
     void compareDoxyfile(std::ostream &t);
+    void writeXMLDoxyfile(std::ostream &t);
     void init() { m_value = m_defValue.copy(); }
+    bool isDefault() { return (m_value == m_defValue); }
 
   private:
     std::vector<QCString> m_valueRange;
@@ -190,9 +197,11 @@ class ConfigString : public ConfigOption
     QCString *valueRef() { return &m_value; }
     void writeTemplate(std::ostream &t,bool sl,bool);
     void compareDoxyfile(std::ostream &t);
+    void writeXMLDoxyfile(std::ostream &t);
     void substEnvVars();
     void init() { m_value = m_defValue.copy(); }
     void emptyValueToDefault() { if(m_value.isEmpty()) m_value=m_defValue; };
+    bool isDefault() { return (m_value.stripWhiteSpace() == m_defValue.stripWhiteSpace()); }
 
   private:
     QCString m_value;
@@ -223,7 +232,9 @@ class ConfigInt : public ConfigOption
     void substEnvVars();
     void writeTemplate(std::ostream &t,bool sl,bool upd);
     void compareDoxyfile(std::ostream &t);
+    void writeXMLDoxyfile(std::ostream &t);
     void init() { m_value = m_defValue; }
+    bool isDefault() { return (m_value == m_defValue); }
   private:
     int m_value;
     int m_defValue;
@@ -252,7 +263,9 @@ class ConfigBool : public ConfigOption
     void setValueString(const QCString &v) { m_valueString = v; }
     void writeTemplate(std::ostream &t,bool sl,bool upd);
     void compareDoxyfile(std::ostream &t);
+    void writeXMLDoxyfile(std::ostream &t);
     void init() { m_value = m_defValue; }
+    bool isDefault() { return (m_value == m_defValue); }
   private:
     bool m_value;
     bool m_defValue;
@@ -268,6 +281,7 @@ class ConfigObsolete : public ConfigOption
     { m_name = name; }
     void writeTemplate(std::ostream &,bool,bool);
     void compareDoxyfile(std::ostream &) {}
+    void writeXMLDoxyfile(std::ostream &) {};
     void substEnvVars() {}
 };
 
@@ -280,6 +294,7 @@ class ConfigDisabled : public ConfigOption
     { m_name = name; }
     void writeTemplate(std::ostream &,bool,bool);
     void compareDoxyfile(std::ostream &) {}
+    void writeXMLDoxyfile(std::ostream &) {};
     void substEnvVars() {}
 };
 
@@ -480,6 +495,11 @@ class ConfigImpl
      */
     void compareDoxyfile(std::ostream &t);
 
+    /*! Writes a the used settings of the current configuartion as XML format
+     *  to stream \a t.
+     */
+    void writeXMLDoxyfile(std::ostream &t);
+
     void setHeader(const char *header) { m_header = header; }
 
     /////////////////////////////
diff --git a/src/configimpl.l b/src/configimpl.l
index 6f22061..2e3b5e7 100644
--- a/src/configimpl.l
+++ b/src/configimpl.l
@@ -37,6 +37,7 @@
 #include "portable.h"
 #include "message.h"
 #include "lang_cfg.h"
+#include "language.h"
 #include "configoptions.h"
 #include "fileinfo.h"
 #include "dir.h"
@@ -127,18 +128,19 @@ static QCString convertToComment(const QCString &s, const QCString &u)
   return result;
 }
 
-void ConfigOption::writeBoolValue(std::ostream &t,bool v)
+void ConfigOption::writeBoolValue(std::ostream &t,bool v,bool initSpace)
 {
-  t << " ";
+  if (initSpace) t << " ";
   if (v) t << "YES"; else t << "NO";
 }
 
-void ConfigOption::writeIntValue(std::ostream &t,int i)
+void ConfigOption::writeIntValue(std::ostream &t,int i,bool initSpace)
 {
-  t << " " << i;
+  if (initSpace) t << " ";
+  t << i;
 }
 
-void ConfigOption::writeStringValue(std::ostream &t,const QCString &s)
+void ConfigOption::writeStringValue(std::ostream &t,const QCString &s,bool initSpace)
 {
   char c;
   bool needsEscaping=FALSE;
@@ -147,7 +149,7 @@ void ConfigOption::writeStringValue(std::ostream &t,const QCString &s)
   const char *p=se.data();
   if (p)
   {
-    t << " ";
+    if (initSpace) t << " ";
     while ((c=*p++)!=0 && !needsEscaping)
       needsEscaping = (c==' ' || c== ',' || c=='\n' || c=='\t' || c=='"' || c=='#');
     if (needsEscaping)
@@ -349,7 +351,7 @@ void ConfigList::writeTemplate(std::ostream &t,bool sl,bool)
   t << "\n";
 }
 
-void ConfigList::compareDoxyfile(std::ostream &t)
+bool ConfigList::isDefault()
 {
   auto get_stripped = [](std::string s)             { return QCString(s.c_str()).stripWhiteSpace(); };
   auto is_not_empty = [get_stripped](std::string s) { return !get_stripped(s).isEmpty();            };
@@ -357,8 +359,7 @@ void ConfigList::compareDoxyfile(std::ostream &t)
   int valCnt = std::count_if(m_defaultValue.begin(),m_defaultValue.end(),is_not_empty);
   if ( valCnt != defCnt)
   {
-    writeTemplate(t,TRUE,TRUE);
-    return;
+    return false;
   }
   auto it1 = m_value.begin();
   auto it2 = m_defaultValue.begin();
@@ -373,13 +374,37 @@ void ConfigList::compareDoxyfile(std::ostream &t)
     {
       if (get_stripped(*it1) != get_stripped(*it2)) // not the default, write as difference
       {
-        writeTemplate(t,TRUE,TRUE);
-        return;
+        return false;
       }
       ++it1;
       ++it2;
     }
   }
+  return true;
+}
+
+void ConfigList::compareDoxyfile(std::ostream &t)
+{
+  if (!isDefault()) writeTemplate(t,TRUE,TRUE);
+}
+
+void ConfigList::writeXMLDoxyfile(std::ostream &t)
+{
+  t << "  <option  id='" << m_name << "'";
+  t << " default='" << (isDefault() ? "yes" : "no") << "'";
+  t << " type='stringlist'";
+  t << ">";
+  t << "\n";
+  for (const auto &p : m_value)
+  {
+    QCString s=p.c_str();
+    t << "    <value>";
+    t << "<![CDATA[";
+    writeStringValue(t,s,false);
+    t << "]]>";
+    t << "</value>\n";
+  }
+  t << "  </option>\n";
 }
 
 void ConfigEnum::writeTemplate(std::ostream &t,bool sl,bool)
@@ -401,7 +426,19 @@ void ConfigEnum::writeTemplate(std::ostream &t,bool sl,bool)
 
 void ConfigEnum::compareDoxyfile(std::ostream &t)
 {
-  if (m_value != m_defValue) writeTemplate(t,TRUE,TRUE);
+  if (!isDefault()) writeTemplate(t,TRUE,TRUE);
+}
+
+void ConfigEnum::writeXMLDoxyfile(std::ostream &t)
+{
+  t << "  <option  id='" << m_name << "'";
+  t << " default='" << (isDefault() ? "yes" : "no") << "'";
+  t << " type='string'";
+  t << ">";
+  t << "<value>";
+  writeStringValue(t,m_value,false);
+  t << "</value>";
+  t << "</option>\n";
 }
 
 void ConfigString::writeTemplate(std::ostream &t,bool sl,bool)
@@ -423,7 +460,21 @@ void ConfigString::writeTemplate(std::ostream &t,bool sl,bool)
 
 void ConfigString::compareDoxyfile(std::ostream &t)
 {
-  if (m_value.stripWhiteSpace() != m_defValue.stripWhiteSpace()) writeTemplate(t,TRUE,TRUE);
+  if (!isDefault()) writeTemplate(t,TRUE,TRUE);
+}
+
+void ConfigString::writeXMLDoxyfile(std::ostream &t)
+{
+  t << "  <option  id='" << m_name << "'";
+  t << " default='" << (isDefault() ? "yes" : "no") << "'";
+  t << " type='string'";
+  t << ">";
+  t << "<value>";
+  t << "<![CDATA[";
+  writeStringValue(t,m_value,false);
+  t << "]]>";
+  t << "</value>";
+  t << "</option>\n";
 }
 
 void ConfigInt::writeTemplate(std::ostream &t,bool sl,bool upd)
@@ -452,9 +503,22 @@ void ConfigInt::writeTemplate(std::ostream &t,bool sl,bool upd)
 
 void ConfigInt::compareDoxyfile(std::ostream &t)
 {
-  if (m_value != m_defValue) writeTemplate(t,TRUE,TRUE);
+  if (!isDefault()) writeTemplate(t,TRUE,TRUE);
+}
+
+void ConfigInt::writeXMLDoxyfile(std::ostream &t)
+{
+  t << "  <option  id='" << m_name << "'";
+  t << " default='" << (isDefault() ? "yes" : "no") << "'";
+  t << " type='int'";
+  t << ">";
+  t << "<value>";
+  writeIntValue(t,m_value,false);
+  t << "</value>";
+  t << "</option>\n";
 }
 
+
 void ConfigBool::writeTemplate(std::ostream &t,bool sl,bool upd)
 {
   if (!sl)
@@ -482,9 +546,22 @@ void ConfigBool::writeTemplate(std::ostream &t,bool sl,bool upd)
 
 void ConfigBool::compareDoxyfile(std::ostream &t)
 {
-  if (m_value != m_defValue) writeTemplate(t,TRUE,TRUE);
+  if (!isDefault()) writeTemplate(t,TRUE,TRUE);
 }
 
+void ConfigBool::writeXMLDoxyfile(std::ostream &t)
+{
+  t << "  <option  id='" << m_name << "'";
+  t << " default='" << (isDefault() ? "yes" : "no") << "'";
+  t << " type='bool'";
+  t << ">";
+  t << "<value>";
+  writeBoolValue(t,m_value,false);
+  t << "</value>";
+  t << "</option>\n";
+}
+
+
 void ConfigObsolete::writeTemplate(std::ostream &,bool,bool) {}
 void ConfigDisabled::writeTemplate(std::ostream &,bool,bool) {}
 
@@ -1117,6 +1194,17 @@ void ConfigImpl::compareDoxyfile(std::ostream &t)
   }
 }
 
+void ConfigImpl::writeXMLDoxyfile(std::ostream &t)
+{
+  t << "<?xml version='1.0' encoding='UTF-8' standalone='no'?>\n";
+  t << "<doxyfile xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:noNamespaceSchemaLocation=\"doxyfile.xsd\" version=\"" << getDoxygenVersion() << "\" xml:lang=\"" <<  theTranslator->trISOLang() << "\">\n";
+  for (const auto &option : m_options)
+  {
+    option->writeXMLDoxyfile(t);
+  }
+  t << "</doxyfile>\n";
+}
+
 void ConfigImpl::convertStrToVal()
 {
   for (const auto &option : m_options)
@@ -2073,6 +2161,11 @@ void Config::compareDoxyfile(std::ostream &t)
   ConfigImpl::instance()->compareDoxyfile(t);
 }
 
+void Config::writeXMLDoxyfile(std::ostream &t)
+{
+  ConfigImpl::instance()->writeXMLDoxyfile(t);
+}
+
 bool Config::parse(const char *fileName,bool update)
 {
   return ConfigImpl::instance()->parse(fileName,update);
diff --git a/src/xmlgen.cpp b/src/xmlgen.cpp
index 9f74b69..39346da 100644
--- a/src/xmlgen.cpp
+++ b/src/xmlgen.cpp
@@ -1822,6 +1822,7 @@ void generateXML()
 
   ResourceMgr::instance().copyResource("xml.xsd",outputDirectory);
   ResourceMgr::instance().copyResource("index.xsd",outputDirectory);
+  ResourceMgr::instance().copyResource("doxyfile.xsd",outputDirectory);
 
   QCString fileName=outputDirectory+"/compound.xsd";
   std::ofstream t(fileName.str(),std::ofstream::out | std::ofstream::binary);
@@ -1858,6 +1859,19 @@ void generateXML()
   }
   t.close();
 
+  std::ofstream f;
+  fileName=outputDirectory+"/Doxyfile.xml";
+  bool fileOpened=openOutputFile(fileName,f);
+  if (fileOpened)
+  {
+    Config::writeXMLDoxyfile(f);
+  }
+  else
+  {
+    err("Cannot open file %s for writing\n",fileName.data());
+    return;
+  }
+
   fileName=outputDirectory+"/index.xml";
   t.open(fileName.str(),std::ofstream::out | std::ofstream::binary);
   if (!t.is_open())