ENH: Refactor cmInstallGenerator for re-use

A new cmScriptGenerator base class factors out the non-install-specific
part of cmInstallGenerator.  This will be useful for other generators
that want per-configuration functionality.

Source/cmScriptGenerator.cxx

@@ -0,0 +1,232 @@
+/*=========================================================================
+
+  Program:   CMake - Cross-Platform Makefile Generator
+  Module:    $RCSfile$
+  Language:  C++
+  Date:      $Date$
+  Version:   $Revision$
+
+  Copyright (c) 2002 Kitware, Inc., Insight Consortium.  All rights reserved.
+  See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
+
+     This software is distributed WITHOUT ANY WARRANTY; without even
+     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+     PURPOSE.  See the above copyright notices for more information.
+
+=========================================================================*/
+#include "cmScriptGenerator.h"
+
+#include "cmSystemTools.h"
+
+//----------------------------------------------------------------------------
+cmScriptGenerator
+::cmScriptGenerator(const char* config_var,
+                    std::vector<std::string> const& configurations):
+  RuntimeConfigVariable(config_var),
+  Configurations(configurations),
+  ConfigurationName(0),
+  ConfigurationTypes(0),
+  ActionsPerConfig(false)
+{
+}
+
+//----------------------------------------------------------------------------
+cmScriptGenerator
+::~cmScriptGenerator()
+{
+}
+
+//----------------------------------------------------------------------------
+void
+cmScriptGenerator
+::Generate(std::ostream& os, const char* config,
+           std::vector<std::string> const& configurationTypes)
+{
+  this->ConfigurationName = config;
+  this->ConfigurationTypes = &configurationTypes;
+  this->GenerateScript(os);
+  this->ConfigurationName = 0;
+  this->ConfigurationTypes = 0;
+}
+
+//----------------------------------------------------------------------------
+static void cmScriptGeneratorEncodeConfig(const char* config,
+                                          std::string& result)
+{
+  for(const char* c = config; *c; ++c)
+    {
+    if(*c >= 'a' && *c <= 'z')
+      {
+      result += "[";
+      result += *c + ('A' - 'a');
+      result += *c;
+      result += "]";
+      }
+    else if(*c >= 'A' && *c <= 'Z')
+      {
+      result += "[";
+      result += *c;
+      result += *c + ('a' - 'A');
+      result += "]";
+      }
+    else
+      {
+      result += *c;
+      }
+    }
+}
+
+//----------------------------------------------------------------------------
+std::string
+cmScriptGenerator::CreateConfigTest(const char* config)
+{
+  std::string result = "\"${";
+  result += this->RuntimeConfigVariable;
+  result += "}\" MATCHES \"^(";
+  if(config && *config)
+    {
+    cmScriptGeneratorEncodeConfig(config, result);
+    }
+  result += ")$\"";
+  return result;
+}
+
+//----------------------------------------------------------------------------
+std::string
+cmScriptGenerator::CreateConfigTest(std::vector<std::string> const& configs)
+{
+  std::string result = "\"${";
+  result += this->RuntimeConfigVariable;
+  result += "}\" MATCHES \"^(";
+  const char* sep = "";
+  for(std::vector<std::string>::const_iterator ci = configs.begin();
+      ci != configs.end(); ++ci)
+    {
+    result += sep;
+    sep = "|";
+    cmScriptGeneratorEncodeConfig(ci->c_str(), result);
+    }
+  result += ")$\"";
+  return result;
+}
+
+//----------------------------------------------------------------------------
+void cmScriptGenerator::GenerateScript(std::ostream& os)
+{
+  // Track indentation.
+  Indent indent;
+
+  // Generate the script possibly with per-configuration code.
+  this->GenerateScriptConfigs(os, indent);
+}
+
+//----------------------------------------------------------------------------
+void cmScriptGenerator::GenerateScriptConfigs(std::ostream& os,
+                                              Indent const& indent)
+{
+  if(this->ActionsPerConfig)
+    {
+    this->GenerateScriptActionsPerConfig(os, indent);
+    }
+  else
+    {
+    this->GenerateScriptActionsOnce(os, indent);
+    }
+}
+
+//----------------------------------------------------------------------------
+void cmScriptGenerator::GenerateScriptActions(std::ostream& os,
+                                              Indent const& indent)
+{
+  if(this->ActionsPerConfig)
+    {
+    // This is reached for single-configuration build generators in a
+    // per-config script generator.
+    this->GenerateScriptForConfig(os, this->ConfigurationName, indent);
+    }
+}
+
+//----------------------------------------------------------------------------
+void cmScriptGenerator::GenerateScriptForConfig(std::ostream&, const char*,
+                                                Indent const&)
+{
+  // No actions for this generator.
+}
+
+//----------------------------------------------------------------------------
+bool cmScriptGenerator::GeneratesForConfig(const char* config)
+{
+  // If this is not a configuration-specific rule then we install.
+  if(this->Configurations.empty())
+    {
+    return true;
+    }
+
+  // This is a configuration-specific rule.  Check if the config
+  // matches this rule.
+  std::string config_upper = cmSystemTools::UpperCase(config?config:"");
+  for(std::vector<std::string>::const_iterator i =
+        this->Configurations.begin();
+      i != this->Configurations.end(); ++i)
+    {
+    if(cmSystemTools::UpperCase(*i) == config_upper)
+      {
+      return true;
+      }
+    }
+  return false;
+}
+
+//----------------------------------------------------------------------------
+void cmScriptGenerator::GenerateScriptActionsOnce(std::ostream& os,
+                                                  Indent const& indent)
+{
+  if(this->Configurations.empty())
+    {
+    // This rule is for all configurations.
+    this->GenerateScriptActions(os, indent);
+    }
+  else
+    {
+    // Generate a per-configuration block.
+    std::string config_test = this->CreateConfigTest(this->Configurations);
+    os << indent << "IF(" << config_test << ")\n";
+    this->GenerateScriptActions(os, indent.Next());
+    os << indent << "ENDIF(" << config_test << ")\n";
+    }
+}
+
+//----------------------------------------------------------------------------
+void cmScriptGenerator::GenerateScriptActionsPerConfig(std::ostream& os,
+                                                       Indent const& indent)
+{
+  if(this->ConfigurationTypes->empty())
+    {
+    // In a single-configuration generator there is only one action
+    // and it applies if the runtime-requested configuration is among
+    // the rule's allowed configurations.  The configuration built in
+    // the tree does not matter for this decision but will be used to
+    // generate proper target file names into the code.
+    this->GenerateScriptActionsOnce(os, indent);
+    }
+  else
+    {
+    // In a multi-configuration generator we produce a separate rule
+    // in a block for each configuration that is built.  We restrict
+    // the list of configurations to those to which this rule applies.
+    for(std::vector<std::string>::const_iterator i =
+          this->ConfigurationTypes->begin();
+        i != this->ConfigurationTypes->end(); ++i)
+      {
+      const char* config = i->c_str();
+      if(this->GeneratesForConfig(config))
+        {
+        // Generate a per-configuration block.
+        std::string config_test = this->CreateConfigTest(config);
+        os << indent << "IF(" << config_test << ")\n";
+        this->GenerateScriptForConfig(os, config, indent.Next());
+        os << indent << "ENDIF(" << config_test << ")\n";
+        }
+      }
+    }
+}