[moveonly] Extract HelpRequested to dry up the help options testing

This ensures consistency across interfaces and makes the version handling more clear.

src/bench/bench_bitcoin.cpp

@@ -27,7 +27,7 @@ main(int argc, char** argv)
 {
     gArgs.ParseParameters(argc, argv);
 
-    if (gArgs.IsArgSet("-?") || gArgs.IsArgSet("-h") || gArgs.IsArgSet("-help")) {
+    if (HelpRequested(gArgs)) {
         std::cout << HelpMessageGroup(_("Options:"))
                   << HelpMessageOpt("-?", _("Print this help message and exit"))
                   << HelpMessageOpt("-list", _("List benchmarks without executing them. Can be combined with -scaling and -filter"))

src/bitcoin-cli.cpp

@@ -82,7 +82,7 @@ static int AppInitRPC(int argc, char* argv[])
     // Parameters
     //
     gArgs.ParseParameters(argc, argv);
-    if (argc<2 || gArgs.IsArgSet("-?") || gArgs.IsArgSet("-h") || gArgs.IsArgSet("-help") || gArgs.IsArgSet("-version")) {
+    if (argc < 2 || HelpRequested(gArgs) || gArgs.IsArgSet("-version")) {
         std::string strUsage = strprintf(_("%s RPC client version"), _(PACKAGE_NAME)) + " " + FormatFullVersion() + "\n";
         if (!gArgs.IsArgSet("-version")) {
             strUsage += "\n" + _("Usage:") + "\n" +

src/bitcoin-tx.cpp

@@ -51,8 +51,7 @@ static int AppInitRawTx(int argc, char* argv[])
 
     fCreateBlank = gArgs.GetBoolArg("-create", false);
 
-    if (argc<2 || gArgs.IsArgSet("-?") || gArgs.IsArgSet("-h") || gArgs.IsArgSet("-help"))
-    {
+    if (argc < 2 || HelpRequested(gArgs)) {
         // First part of help message is specific to this utility
         std::string strUsage = strprintf(_("%s bitcoin-tx utility version"), _(PACKAGE_NAME)) + " " + FormatFullVersion() + "\n\n" +
             _("Usage:") + "\n" +

src/bitcoind.cpp

@@ -76,8 +76,7 @@ bool AppInit(int argc, char* argv[])
     gArgs.ParseParameters(argc, argv);
 
     // Process help and version before taking care about datadir
-    if (gArgs.IsArgSet("-?") || gArgs.IsArgSet("-h") ||  gArgs.IsArgSet("-help") || gArgs.IsArgSet("-version"))
-    {
+    if (HelpRequested(gArgs) || gArgs.IsArgSet("-version")) {
         std::string strUsage = strprintf(_("%s Daemon"), _(PACKAGE_NAME)) + " " + _("version") + " " + FormatFullVersion() + "\n";
 
         if (gArgs.IsArgSet("-version"))

src/qt/bitcoin.cpp

@@ -613,8 +613,7 @@ int main(int argc, char *argv[])
 
     // Show help message immediately after parsing command-line options (for "-lang") and setting locale,
     // but before showing splash screen.
-    if (gArgs.IsArgSet("-?") || gArgs.IsArgSet("-h") || gArgs.IsArgSet("-help") || gArgs.IsArgSet("-version"))
-    {
+    if (HelpRequested(gArgs) || gArgs.IsArgSet("-version")) {
         HelpMessageDialog help(nullptr, gArgs.IsArgSet("-version"));
         help.showOrPrint();
         return EXIT_SUCCESS;

src/util.cpp

@@ -584,7 +584,10 @@ void ArgsManager::ForceSetArg(const std::string& strArg, const std::string& strV
     mapMultiArgs[strArg] = {strValue};
 }
 
-
+bool HelpRequested(const ArgsManager& args)
+{
+    return args.IsArgSet("-?") || args.IsArgSet("-h") || args.IsArgSet("-help");
+}
 
 static const int screenWidth = 79;
 static const int optIndent = 2;

src/util.h

@@ -313,6 +313,11 @@ private:
 
 extern ArgsManager gArgs;
 
+/**
+ * @return true if help has been requested via a command-line arg
+ */
+bool HelpRequested(const ArgsManager& args);
+
 /**
  * Format a string to be used as group of options in help messages
  *