Add undocumented -forcecompactdb to force LevelDB compactions

contrib/devtools/check-doc.py

@@ -21,7 +21,7 @@ CMD_GREP_DOCS = r"egrep -r -I 'HelpMessageOpt\(\"\-[^\"=]+?(=|\")' %s" % (CMD_RO
 REGEX_ARG = re.compile(r'(?:map(?:Multi)?Args(?:\.count\(|\[)|Get(?:Bool)?Arg\()\"(\-[^\"]+?)\"')
 REGEX_DOC = re.compile(r'HelpMessageOpt\(\"(\-[^\"=]+?)(?:=|\")')
 # list unsupported, deprecated and duplicate args as they need no documentation
-SET_DOC_OPTIONAL = set(['-rpcssl', '-benchmark', '-h', '-help', '-socks', '-tor', '-debugnet', '-whitelistalwaysrelay', '-prematurewitness', '-walletprematurewitness', '-promiscuousmempoolflags', '-blockminsize', '-dbcrashratio'])
+SET_DOC_OPTIONAL = set(['-rpcssl', '-benchmark', '-h', '-help', '-socks', '-tor', '-debugnet', '-whitelistalwaysrelay', '-prematurewitness', '-walletprematurewitness', '-promiscuousmempoolflags', '-blockminsize', '-dbcrashratio', '-forcecompactdb'])
 
 def main():
   used = check_output(CMD_GREP_ARGS, shell=True)

src/dbwrapper.cpp

@@ -115,6 +115,12 @@ CDBWrapper::CDBWrapper(const fs::path& path, size_t nCacheSize, bool fMemory, bo
     dbwrapper_private::HandleError(status);
     LogPrintf("Opened LevelDB successfully\n");
 
+    if (GetBoolArg("-forcecompactdb", false)) {
+        LogPrintf("Starting database compaction of %s\n", path.string());
+        pdb->CompactRange(nullptr, nullptr);
+        LogPrintf("Finished database compaction of %s\n", path.string());
+    }
+
     // The base-case obfuscation key, which is a noop.
     obfuscate_key = std::vector<unsigned char>(OBFUSCATE_KEY_NUM_BYTES, '\000');