cmake_command: Add command to EVAL a CMake script as a string

1 files changed, 24 insertions, 3 deletions

diff --git a/Source/cmCMakeCommand.cxx b/Source/cmCMakeCommand.cxx
index 5699086..c11a003 100644
--- a/Source/cmCMakeCommand.cxx
+++ b/Source/cmCMakeCommand.cxx
@@ -2,11 +2,14 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmCMakeCommand.h"
 
+#include <algorithm>
 #include <cstddef>
 
 #include "cmExecutionStatus.h"
 #include "cmListFileCache.h"
 #include "cmMakefile.h"
+#include "cmRange.h"
+#include "cmStringAlgorithms.h"
 
 bool cmCMakeCommand(std::vector<std::string> const& args,
                     cmExecutionStatus& status)
@@ -19,6 +22,8 @@ bool cmCMakeCommand(std::vector<std::string> const& args,
   cmMakefile& makefile = status.GetMakefile();
   cmListFileContext context = makefile.GetExecutionContext();
 
+  bool result = false;
+
   if (args[0] == "INVOKE") {
     if (args.size() == 1) {
       status.SetError("called with incorrect number of arguments");
@@ -39,9 +44,25 @@ bool cmCMakeCommand(std::vector<std::string> const& args,
       func.Arguments.emplace_back(lfarg);
     }
 
-    return makefile.ExecuteCommand(func, status);
+    result = makefile.ExecuteCommand(func, status);
+  } else if (args[0] == "EVAL") {
+    if (args.size() < 2) {
+      status.SetError("called with incorrect number of arguments");
+      return false;
+    }
+
+    auto code_iter = std::find(args.begin(), args.end(), "CODE");
+    if (code_iter == args.end()) {
+      status.SetError("called without CODE argument");
+      return false;
+    }
+
+    const std::string code = cmJoin(cmMakeRange(++code_iter, args.end()), " ");
+    result = makefile.ReadListFileAsString(
+      code, cmStrCat(context.FilePath, ":", context.Line, ":EVAL"));
+  } else {
+    status.SetError("called with unknown meta-operation");
   }
 
-  status.SetError("called with unknown meta-operation");
-  return false;
+  return result;
 }