util: Store debug log file path in BCLog::Logger member.

This breaks the cyclic between logging and util.

src/logging.cpp

@@ -4,7 +4,7 @@
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <logging.h>
-#include <util.h>
+#include <utiltime.h>
 
 const char * const DEFAULT_DEBUGLOGFILE = "debug.log";
 
@@ -30,20 +30,14 @@ static int FileWriteStr(const std::string &str, FILE *fp)
     return fwrite(str.data(), 1, str.size(), fp);
 }
 
-fs::path BCLog::Logger::GetDebugLogPath() const
-{
-    fs::path logfile(gArgs.GetArg("-debuglogfile", DEFAULT_DEBUGLOGFILE));
-    return AbsPathForConfigVal(logfile);
-}
-
 bool BCLog::Logger::OpenDebugLog()
 {
     std::lock_guard<std::mutex> scoped_lock(m_file_mutex);
 
     assert(m_fileout == nullptr);
-    fs::path pathDebug = GetDebugLogPath();
+    assert(!m_file_path.empty());
 
-    m_fileout = fsbridge::fopen(pathDebug, "a");
+    m_fileout = fsbridge::fopen(m_file_path, "a");
     if (!m_fileout) {
         return false;
     }
@@ -228,8 +222,7 @@ int BCLog::Logger::LogPrintStr(const std::string &str)
             // reopen the log file, if requested
             if (m_reopen_file) {
                 m_reopen_file = false;
-                fs::path pathDebug = GetDebugLogPath();
-                if (fsbridge::freopen(pathDebug,"a",m_fileout) != nullptr)
+                if (fsbridge::freopen(m_file_path,"a",m_fileout) != nullptr)
                     setbuf(m_fileout, nullptr); // unbuffered
             }
 
@@ -243,14 +236,16 @@ void BCLog::Logger::ShrinkDebugFile()
 {
     // Amount of debug.log to save at end when shrinking (must fit in memory)
     constexpr size_t RECENT_DEBUG_HISTORY_SIZE = 10 * 1000000;
+
+    assert(!m_file_path.empty());
+
     // Scroll debug.log if it's getting too big
-    fs::path pathLog = GetDebugLogPath();
-    FILE* file = fsbridge::fopen(pathLog, "r");
+    FILE* file = fsbridge::fopen(m_file_path, "r");
 
     // Special files (e.g. device nodes) may not have a size.
     size_t log_size = 0;
     try {
-        log_size = fs::file_size(pathLog);
+        log_size = fs::file_size(m_file_path);
     } catch (boost::filesystem::filesystem_error &) {}
 
     // If debug.log file is more than 10% bigger the RECENT_DEBUG_HISTORY_SIZE
@@ -263,7 +258,7 @@ void BCLog::Logger::ShrinkDebugFile()
         int nBytes = fread(vch.data(), 1, vch.size(), file);
         fclose(file);
 
-        file = fsbridge::fopen(pathLog, "w");
+        file = fsbridge::fopen(m_file_path, "w");
         if (file)
         {
             fwrite(vch.data(), 1, nBytes, file);