Refactor: Generalize cmExportInstallFileGenerator::ReplaceInstallPrefix()

Source/cmExportInstallFileGenerator.cxx

@@ -258,15 +258,7 @@ void cmExportInstallFileGenerator::LoadConfigFiles(std::ostream& os)
 
 void cmExportInstallFileGenerator::ReplaceInstallPrefix(std::string& input)
 {
-  std::string::size_type pos = 0;
+  cmGeneratorExpression::ReplaceInstallPrefix(input, "${_IMPORT_PREFIX}");
-  std::string::size_type lastPos = pos;
-
-  while ((pos = input.find("$<INSTALL_PREFIX>", lastPos)) !=
-         std::string::npos) {
-    std::string::size_type endPos = pos + sizeof("$<INSTALL_PREFIX>") - 1;
-    input.replace(pos, endPos - pos, "${_IMPORT_PREFIX}");
-    lastPos = endPos;
-  }
 }
 
 bool cmExportInstallFileGenerator::GenerateImportFileConfig(

Source/cmGeneratorExpression.cxx

@@ -385,6 +385,20 @@ bool cmGeneratorExpression::IsValidTargetName(const std::string& input)
   return targetNameValidator.find(input);
 }
 
+void cmGeneratorExpression::ReplaceInstallPrefix(
+  std::string& input, const std::string& replacement)
+{
+  std::string::size_type pos = 0;
+  std::string::size_type lastPos = pos;
+
+  while ((pos = input.find("$<INSTALL_PREFIX>", lastPos)) !=
+         std::string::npos) {
+    std::string::size_type endPos = pos + sizeof("$<INSTALL_PREFIX>") - 1;
+    input.replace(pos, endPos - pos, replacement);
+    lastPos = endPos;
+  }
+}
+
 void cmCompiledGeneratorExpression::GetMaxLanguageStandard(
   const cmGeneratorTarget* tgt, std::map<std::string, std::string>& mapping)
 {

Source/cmGeneratorExpression.h

@@ -87,6 +87,9 @@ public:
     return input != nullptr && input[0] == '$' && input[1] == '<';
   }
 
+  static void ReplaceInstallPrefix(std::string& input,
+                                   const std::string& replacement);
+
 private:
   cmListFileBacktrace Backtrace;
 };