cmTransformDepfile: Add support for MSBuild AdditionalInputs format

1 files changed, 31 insertions, 0 deletions

diff --git a/Source/cmTransformDepfile.cxx b/Source/cmTransformDepfile.cxx
index 039b19d..4032596 100644
--- a/Source/cmTransformDepfile.cxx
+++ b/Source/cmTransformDepfile.cxx
@@ -2,7 +2,9 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmTransformDepfile.h"
 
+#include <algorithm>
 #include <functional>
+#include <memory>
 #include <string>
 #include <type_traits>
 #include <utility>
@@ -78,6 +80,32 @@ void WriteDepfile(cmDepfileFormat format, cmsys::ofstream& fout,
     }
   }
 }
+
+void WriteMSBuildAdditionalInputs(cmsys::ofstream& fout,
+                                  cmLocalGenerator const& lg,
+                                  cmGccDepfileContent const& content)
+{
+  if (content.empty()) {
+    return;
+  }
+
+  // Write a UTF-8 BOM so MSBuild knows the encoding when reading the file.
+  static const char utf8bom[] = { char(0xEF), char(0xBB), char(0xBF) };
+  fout.write(utf8bom, sizeof(utf8bom));
+
+  // Write the format expected by MSBuild CustomBuild AdditionalInputs.
+  const char* sep = "";
+  for (std::string path : content.front().paths) {
+    if (!cmSystemTools::FileIsFullPath(path)) {
+      path =
+        cmSystemTools::CollapseFullPath(path, lg.GetCurrentBinaryDirectory());
+    }
+    std::replace(path.begin(), path.end(), '/', '\\');
+    fout << sep << path;
+    sep = ";";
+  }
+  fout << "\n";
+}
 }
 
 bool cmTransformDepfile(cmDepfileFormat format, const cmLocalGenerator& lg,
@@ -103,6 +131,9 @@ bool cmTransformDepfile(cmDepfileFormat format, const cmLocalGenerator& lg,
     case cmDepfileFormat::MakeDepfile:
       WriteDepfile(format, fout, lg, content);
       break;
+    case cmDepfileFormat::MSBuildAdditionalInputs:
+      WriteMSBuildAdditionalInputs(fout, lg, content);
+      break;
   }
   return true;
 }