Add the INSTALL_PREFIX genex.

6 files changed, 51 insertions, 0 deletions

diff --git a/Source/cmDocumentGeneratorExpressions.h b/Source/cmDocumentGeneratorExpressions.h
index be9f2ff..8b80a8a 100644
--- a/Source/cmDocumentGeneratorExpressions.h
+++ b/Source/cmDocumentGeneratorExpressions.h
@@ -55,6 +55,8 @@
   "the 'head' target was created, else '0'.  If the policy was not "    \
   "set, the warning message for the policy will be emitted.  This "     \
   "generator expression only works for a subset of policies.\n"         \
+  "  $<INSTALL_PREFIX>         = Content of the install prefix when "   \
+  "the target is exported via INSTALL(EXPORT) and empty otherwise.\n"   \
   "Boolean expressions:\n"                                              \
   "  $<AND:?[,?]...>           = '1' if all '?' are '1', else '0'\n"    \
   "  $<OR:?[,?]...>            = '0' if all '?' are '0', else '1'\n"    \
diff --git a/Source/cmExportFileGenerator.cxx b/Source/cmExportFileGenerator.cxx
index 96e0aea..2ae7138 100644
--- a/Source/cmExportFileGenerator.cxx
+++ b/Source/cmExportFileGenerator.cxx
@@ -431,6 +431,9 @@ cmExportFileGenerator::ResolveTargetsInGeneratorExpression(
     input.replace(pos, endPos - pos + 1, targetName);
     lastPos = endPos;
     }
+
+  this->ReplaceInstallPrefix(input);
+
   if (!errorString.empty())
     {
     mf->IssueMessage(cmake::FATAL_ERROR, errorString);
@@ -439,6 +442,13 @@ cmExportFileGenerator::ResolveTargetsInGeneratorExpression(
 
 //----------------------------------------------------------------------------
 void
+cmExportFileGenerator::ReplaceInstallPrefix(std::string &)
+{
+  // Do nothing
+}
+
+//----------------------------------------------------------------------------
+void
 cmExportFileGenerator
 ::SetImportLinkInterface(const char* config, std::string const& suffix,
                     cmGeneratorExpression::PreprocessContext preprocessRule,
diff --git a/Source/cmExportFileGenerator.h b/Source/cmExportFileGenerator.h
index b39df0f..776be61 100644
--- a/Source/cmExportFileGenerator.h
+++ b/Source/cmExportFileGenerator.h
@@ -152,6 +152,8 @@ private:
   void ResolveTargetsInGeneratorExpression(std::string &input,
                                     cmTarget* target,
                                     std::vector<std::string> &missingTargets);
+
+  virtual void ReplaceInstallPrefix(std::string &input);
 };
 
 #endif
diff --git a/Source/cmExportInstallFileGenerator.cxx b/Source/cmExportInstallFileGenerator.cxx
index c7e3581..b6600f0 100644
--- a/Source/cmExportInstallFileGenerator.cxx
+++ b/Source/cmExportInstallFileGenerator.cxx
@@ -155,6 +155,21 @@ bool cmExportInstallFileGenerator::GenerateMainFile(std::ostream& os)
 }
 
 //----------------------------------------------------------------------------
+void
+cmExportInstallFileGenerator::ReplaceInstallPrefix(std::string &input)
+{
+  std::string::size_type pos = 0;
+  std::string::size_type lastPos = pos;
+
+  while((pos = input.find("$<INSTALL_PREFIX>", lastPos)) != input.npos)
+    {
+    std::string::size_type endPos = pos + sizeof("$<INSTALL_PREFIX>") - 1;
+    input.replace(pos, endPos - pos, "${_IMPORT_PREFIX}");
+    lastPos = endPos;
+    }
+}
+
+//----------------------------------------------------------------------------
 bool
 cmExportInstallFileGenerator::GenerateImportFileConfig(const char* config,
                                     std::vector<std::string> &missingTargets)
diff --git a/Source/cmExportInstallFileGenerator.h b/Source/cmExportInstallFileGenerator.h
index e187749..7a70431 100644
--- a/Source/cmExportInstallFileGenerator.h
+++ b/Source/cmExportInstallFileGenerator.h
@@ -64,6 +64,8 @@ protected:
                                    cmTarget* depender,
                                    cmTarget* dependee);
 
+  virtual void ReplaceInstallPrefix(std::string &input);
+
   void ComplainAboutMissingTarget(cmTarget* depender,
                                   cmTarget* dependee,
                                   int occurrences);
diff --git a/Source/cmGeneratorExpressionEvaluator.cxx b/Source/cmGeneratorExpressionEvaluator.cxx
index 0c61a12..f74b69e 100644
--- a/Source/cmGeneratorExpressionEvaluator.cxx
+++ b/Source/cmGeneratorExpressionEvaluator.cxx
@@ -615,6 +615,24 @@ static const struct TargetPolicyNode : public cmGeneratorExpressionNode
 } targetPolicyNode;
 
 //----------------------------------------------------------------------------
+static const struct InstallPrefixNode : public cmGeneratorExpressionNode
+{
+  InstallPrefixNode() {}
+
+  virtual bool GeneratesContent() const { return false; }
+  virtual int NumExpectedParameters() const { return 0; }
+
+  std::string Evaluate(const std::vector<std::string> &,
+                       cmGeneratorExpressionContext *,
+                       const GeneratorExpressionContent *,
+                       cmGeneratorExpressionDAGChecker *) const
+  {
+    return std::string();
+  }
+
+} installPrefixNode;
+
+//----------------------------------------------------------------------------
 template<bool linker, bool soname>
 struct TargetFilesystemArtifactResultCreator
 {
@@ -849,6 +867,8 @@ cmGeneratorExpressionNode* GetNode(const std::string &identifier)
     return &installInterfaceNode;
   else if (identifier == "TARGET_DEFINED")
     return &targetDefinedNode;
+  else if (identifier == "INSTALL_PREFIX")
+    return &installPrefixNode;
   return 0;
 
 }