Alias

- Broke out alias handling into a separate object.

src/Alias.cpp

@@ -0,0 +1,111 @@
+////////////////////////////////////////////////////////////////////////////////
+//
+// Copyright 2006 - 2014, Paul Beckingham, Federico Hernandez.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+// http://www.opensource.org/licenses/mit-license.php
+//
+////////////////////////////////////////////////////////////////////////////////
+
+#include <cmake.h>
+#include <iostream> // TODO Remove
+#include <vector>
+#include <Alias.h>
+#include <Context.h>
+#include <Tree.h>
+#include <text.h>
+
+extern Context context;
+
+// Alias expansion limit.  Any more indicates some kind of error.
+const int safetyValveDefault = 10;
+
+////////////////////////////////////////////////////////////////////////////////
+Alias::Alias ()
+{
+}
+
+////////////////////////////////////////////////////////////////////////////////
+Alias::~Alias ()
+{
+}
+
+////////////////////////////////////////////////////////////////////////////////
+void Alias::load ()
+{
+  _aliases.clear ();
+
+  std::vector <std::string> vars;
+  context.config.all (vars);
+
+  std::vector <std::string>::iterator var;
+  for (var = vars.begin (); var != vars.end (); ++var)
+    if (var->substr (0, 6) == "alias.")
+      _aliases[var->substr (6)] = context.config.get (*var);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// An alias must be a distinct word on the command line.
+void Alias::resolve (Tree* tree)
+{
+  bool something;
+  int safety_valve = safetyValveDefault;
+
+  do
+  {
+    something = false;
+
+    std::string command;
+    std::vector <Tree*>::iterator i;
+    for (i = tree->_branches.begin (); i != tree->_branches.end (); ++i)
+    {
+      // Parser override operator.
+      if ((*i)->attribute ("raw") == "--")
+        break;
+
+      // Skip known args.
+      if (! (*i)->hasTag ("?"))
+        continue;
+
+      std::string raw = (*i)->attribute ("raw");
+      std::map <std::string, std::string>::iterator match = context.aliases.find (raw);
+      if (match != context.aliases.end ())
+      {
+        something = true;
+
+        std::vector <std::string> words;
+        splitq (words, context.aliases[raw], ' ');
+
+        std::vector <std::string>::iterator word;
+        for (word = words.begin (); word != words.end (); ++word)
+        {
+          // TODO Insert branch (words) in place of (*i).
+          std::cout << "# alias word '" << *word << "'\n";
+        }
+      }
+    }
+  }
+  while (something && --safety_valve > 0);
+
+  if (safety_valve <= 0)
+    context.debug (format ("Nested alias limit of {1} reached.", safetyValveDefault));
+}
+
+////////////////////////////////////////////////////////////////////////////////

src/Alias.h

@@ -0,0 +1,47 @@
+////////////////////////////////////////////////////////////////////////////////
+//
+// Copyright 2006 - 2014, Paul Beckingham, Federico Hernandez.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+// http://www.opensource.org/licenses/mit-license.php
+//
+////////////////////////////////////////////////////////////////////////////////
+
+#ifndef INCLUDED_ALIAS
+#define INCLUDED_ALIAS
+
+#include <string>
+#include <map>
+#include <Tree.h>
+
+class Alias
+{
+public:
+  Alias ();
+  ~Alias ();
+  void load ();
+  void resolve (Tree*);
+
+private:
+  std::map <std::string, std::string> _aliases;
+};
+
+#endif
+