easylogging++: allow clipping a common filename prefix

external/easylogging++/easylogging++.cc

@@ -767,7 +767,11 @@ std::string File::extractPathFromFilename(const std::string& fullPath, const cha
   return fullPath.substr(0, lastSlashAt + 1);
 }
 
-void File::buildStrippedFilename(const char* filename, char buff[], std::size_t limit) {
+void File::buildStrippedFilename(const char* filename, char buff[], const std::string &commonPrefix, std::size_t limit) {
+  if (!commonPrefix.empty()) {
+    if (!strncmp(filename, commonPrefix.c_str(), commonPrefix.size()))
+      filename += commonPrefix.size();
+  }
   std::size_t sizeOfFilename = strlen(filename);
   if (sizeOfFilename >= limit) {
     filename += (sizeOfFilename - limit);
@@ -2394,7 +2398,7 @@ base::type::string_t DefaultLogBuilder::build(const LogMessage* logMessage, bool
   if (logFormat->hasFlag(base::FormatFlags::File)) {
     // File
     base::utils::Str::clearBuff(buff, base::consts::kSourceFilenameMaxLength);
-    base::utils::File::buildStrippedFilename(logMessage->file().c_str(), buff);
+    base::utils::File::buildStrippedFilename(logMessage->file().c_str(), buff, ELPP->vRegistry()->getFilenameCommonPrefix());
     base::utils::Str::replaceFirstWithEscape(logLine, base::consts::kLogFileFormatSpecifier, std::string(buff));
   }
   if (logFormat->hasFlag(base::FormatFlags::FileBase)) {
@@ -2413,7 +2417,7 @@ base::type::string_t DefaultLogBuilder::build(const LogMessage* logMessage, bool
     // Location
     char* buf = base::utils::Str::clearBuff(buff,
                                             base::consts::kSourceFilenameMaxLength + base::consts::kSourceLineMaxLength);
-    base::utils::File::buildStrippedFilename(logMessage->file().c_str(), buff);
+    base::utils::File::buildStrippedFilename(logMessage->file().c_str(), buff, ELPP->vRegistry()->getFilenameCommonPrefix());
     buf = base::utils::Str::addToBuff(buff, buf, bufLim);
     buf = base::utils::Str::addToBuff(":", buf, bufLim);
     buf = base::utils::Str::convertAndAddToBuff(logMessage->line(),  base::consts::kSourceLineMaxLength, buf, bufLim,
@@ -3072,6 +3076,14 @@ void Loggers::clearCategories(void) {
   ELPP->vRegistry()->clearCategories();
 }
 
+void Loggers::setFilenameCommonPrefix(const std::string &prefix) {
+  ELPP->vRegistry()->setFilenameCommonPrefix(prefix);
+}
+
+const std::string &Loggers::getFilenameCommonPrefix() {
+  return ELPP->vRegistry()->getFilenameCommonPrefix();
+}
+
 // VersionInfo
 
 const std::string VersionInfo::version(void) {

external/easylogging++/easylogging++.h

@@ -1103,7 +1103,7 @@ class File : base::StaticClass {
   static std::string extractPathFromFilename(const std::string& fullPath,
       const char* seperator = base::consts::kFilePathSeperator);
   /// @brief builds stripped filename and puts it in buff
-  static void buildStrippedFilename(const char* filename, char buff[],
+  static void buildStrippedFilename(const char* filename, char buff[], const std::string &commonPrefix = NULL,
                                     std::size_t limit = base::consts::kSourceFilenameMaxLength);
   /// @brief builds base filename and puts it in buff
   static void buildBaseFilename(const std::string& fullPath, char buff[],
@@ -2495,11 +2495,20 @@ class VRegistry : base::NoCopy, public base::threading::ThreadSafe {
     return !base::utils::hasFlag(LoggingFlag::DisableVModules, *m_pFlags);
   }
 
+  inline void setFilenameCommonPrefix(const std::string &prefix) {
+    m_filenameCommonPrefix = prefix;
+  }
+
+  inline const std::string &getFilenameCommonPrefix() const {
+    return m_filenameCommonPrefix;
+  }
+
  private:
   base::type::VerboseLevel m_level;
   base::type::EnumType* m_pFlags;
   std::map<std::string, base::type::VerboseLevel> m_modules;
   std::deque<std::pair<std::string, Level>> m_categories;
+  std::string m_filenameCommonPrefix;
 };
 }  // namespace base
 class LogMessage {
@@ -2735,6 +2744,7 @@ class Storage : base::NoCopy, public base::threading::ThreadSafe {
     }
     return it->second;
   }
+
  private:
   base::RegisteredHitCounters* m_registeredHitCounters;
   base::RegisteredLoggers* m_registeredLoggers;
@@ -3925,6 +3935,10 @@ class Loggers : base::StaticClass {
   static void clearVModules(void);
   /// @brief Clears categories
   static void clearCategories(void);
+  /// @brief Sets filename common prefix
+  static void setFilenameCommonPrefix(const std::string &prefix);
+  /// @brief Gets filename common prefix
+  static const std::string &getFilenameCommonPrefix();
 };
 class VersionInfo : base::StaticClass {
  public: