1 files changed, 60 insertions, 0 deletions
diff --git a/Source/cmRemoveCommand.cxx b/Source/cmRemoveCommand.cxx
new file mode 100644
index 0000000..bb14e68
--- /dev/null
+++ b/Source/cmRemoveCommand.cxx
@@ -0,0 +1,60 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#include "cmRemoveCommand.h"
+
+#include "cmMakefile.h"
+#include "cmSystemTools.h"
+
+class cmExecutionStatus;
+
+// cmRemoveCommand
+bool cmRemoveCommand::InitialPass(std::vector<std::string> const& args,
+                                  cmExecutionStatus&)
+{
+  if (args.empty()) {
+    return true;
+  }
+
+  std::string const& variable = args[0]; // VAR is always first
+  // get the old value
+  const char* cacheValue = this->Makefile->GetDefinition(variable);
+
+  // if there is no old value then return
+  if (!cacheValue) {
+    return true;
+  }
+
+  // expand the variable
+  std::vector<std::string> varArgsExpanded;
+  cmSystemTools::ExpandListArgument(cacheValue, varArgsExpanded);
+
+  // expand the args
+  // check for REMOVE(VAR v1 v2 ... vn)
+  std::vector<std::string> argsExpanded;
+  std::vector<std::string> temp;
+  temp.insert(temp.end(), args.begin() + 1, args.end());
+  cmSystemTools::ExpandList(temp, argsExpanded);
+
+  // now create the new value
+  std::string value;
+  for (std::string const& varArgExpanded : varArgsExpanded) {
+    int found = 0;
+    for (std::string const& argExpanded : argsExpanded) {
+      if (varArgExpanded == argExpanded) {
+        found = 1;
+        break;
+      }
+    }
+    if (!found) {
+      if (!value.empty()) {
+        value += ";";
+      }
+      value += varArgExpanded;
+    }
+  }
+
+  // add the definition
+  this->Makefile->AddDefinition(variable, value.c_str());
+
+  return true;
+}