From 3c83f5df0f7e13d2dbe8fd384b548e7a45f1c0e3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Atgeirr=20Fl=C3=B8=20Rasmussen?= <atgeirr@sintef.no>
Date: Fri, 16 Oct 2020 13:55:45 +0200
Subject: [PATCH] Add --help-all option that also prints hidden options.

---
 opm/models/utils/parametersystem.hh | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/opm/models/utils/parametersystem.hh b/opm/models/utils/parametersystem.hh
index d7a2180ac..51d7f24fd 100644
--- a/opm/models/utils/parametersystem.hh
+++ b/opm/models/utils/parametersystem.hh
@@ -513,7 +513,8 @@ void printParamList_(std::ostream& os, const std::list<std::string>& keyList, bo
 template <class TypeTag>
 void printUsage(const std::string& helpPreamble,
                 const std::string& errorMsg = "",
-                std::ostream& os = std::cerr)
+                std::ostream& os = std::cerr,
+                const bool showAll = false)
 {
     using ParamsMeta = GetProp<TypeTag, Properties::ParameterMetaData>;
 
@@ -532,12 +533,15 @@ void printUsage(const std::string& helpPreamble,
         pInfo.paramName = "h,--help";
         pInfo.usageString = "Print this help message and exit";
         printParamUsage_(os, pInfo);
+        pInfo.paramName = "-help-all";
+        pInfo.usageString = "Print all parameters, including obsolete, hidden and deprecated ones.";
+        printParamUsage_(os, pInfo);
     }
 
     auto paramIt = ParamsMeta::registry().begin();
     const auto& paramEndIt = ParamsMeta::registry().end();
     for (; paramIt != paramEndIt; ++paramIt) {
-        if (!paramIt->second.isHidden)
+        if (showAll || !paramIt->second.isHidden)
             printParamUsage_(os, paramIt->second);
     }
 }
@@ -693,6 +697,10 @@ std::string parseCommandLineOptions(int argc,
                 printUsage<TypeTag>(helpPreamble, /*errorMsg=*/"", std::cout);
                 return "Help called";
             }
+            if (std::string("--help-all") == argv[i]) {
+                printUsage<TypeTag>(helpPreamble, /*errorMsg=*/"", std::cout, true);
+                return "Help called";
+            }
         }
     }