execute_process: Add ECHO_(OUTPUT|ERROR)_VARIABLE options

Fixes: #20378

1 files changed, 15 insertions, 7 deletions

diff --git a/Source/cmExecuteProcessCommand.cxx b/Source/cmExecuteProcessCommand.cxx
index 5be5bcecfa..08a0f7e646 100644
--- a/Source/cmExecuteProcessCommand.cxx
+++ b/Source/cmExecuteProcessCommand.cxx
@@ -61,6 +61,8 @@ bool cmExecuteProcessCommand(std::vector<std::string> const& args,
     bool ErrorQuiet = false;
     bool OutputStripTrailingWhitespace = false;
     bool ErrorStripTrailingWhitespace = false;
+    bool EchoOutputVariable = false;
+    bool EchoErrorVariable = false;
     std::string Encoding;
   };
 
@@ -83,7 +85,9 @@ bool cmExecuteProcessCommand(std::vector<std::string> const& args,
             &Arguments::OutputStripTrailingWhitespace)
       .Bind("ERROR_STRIP_TRAILING_WHITESPACE"_s,
             &Arguments::ErrorStripTrailingWhitespace)
-      .Bind("ENCODING"_s, &Arguments::Encoding);
+      .Bind("ENCODING"_s, &Arguments::Encoding)
+      .Bind("ECHO_OUTPUT_VARIABLE"_s, &Arguments::EchoOutputVariable)
+      .Bind("ECHO_ERROR_VARIABLE"_s, &Arguments::EchoErrorVariable);
 
   std::vector<std::string> unparsedArguments;
   std::vector<std::string> keywordsMissingValue;
@@ -241,28 +245,32 @@ bool cmExecuteProcessCommand(std::vector<std::string> const& args,
   while ((p = cmsysProcess_WaitForData(cp, &data, &length, nullptr))) {
     // Put the output in the right place.
     if (p == cmsysProcess_Pipe_STDOUT && !arguments.OutputQuiet) {
-      if (arguments.OutputVariable.empty()) {
+      if (arguments.OutputVariable.empty() || arguments.EchoOutputVariable) {
         processOutput.DecodeText(data, length, strdata, 1);
         cmSystemTools::Stdout(strdata);
-      } else {
+      }
+      if (!arguments.OutputVariable.empty()) {
         cmExecuteProcessCommandAppend(tempOutput, data, length);
       }
     } else if (p == cmsysProcess_Pipe_STDERR && !arguments.ErrorQuiet) {
-      if (arguments.ErrorVariable.empty()) {
+      if (arguments.ErrorVariable.empty() || arguments.EchoErrorVariable) {
         processOutput.DecodeText(data, length, strdata, 2);
         cmSystemTools::Stderr(strdata);
-      } else {
+      }
+      if (!arguments.ErrorVariable.empty()) {
         cmExecuteProcessCommandAppend(tempError, data, length);
       }
     }
   }
-  if (!arguments.OutputQuiet && arguments.OutputVariable.empty()) {
+  if (!arguments.OutputQuiet &&
+      (arguments.OutputVariable.empty() || arguments.EchoOutputVariable)) {
     processOutput.DecodeText(std::string(), strdata, 1);
     if (!strdata.empty()) {
       cmSystemTools::Stdout(strdata);
     }
   }
-  if (!arguments.ErrorQuiet && arguments.ErrorVariable.empty()) {
+  if (!arguments.ErrorQuiet &&
+      (arguments.ErrorVariable.empty() || arguments.EchoErrorVariable)) {
     processOutput.DecodeText(std::string(), strdata, 2);
     if (!strdata.empty()) {
       cmSystemTools::Stderr(strdata);