execute_process: Add ENCODING option for Windows child process output

Different applications can use different output encodings.

3 files changed, 32 insertions, 1 deletions

diff --git a/Source/cmExecuteProcessCommand.cxx b/Source/cmExecuteProcessCommand.cxx
index 1562223..eb26a50 100644
--- a/Source/cmExecuteProcessCommand.cxx
+++ b/Source/cmExecuteProcessCommand.cxx
@@ -47,6 +47,7 @@ bool cmExecuteProcessCommand::InitialPass(std::vector<std::string> const& args,
   std::string error_variable;
   std::string result_variable;
   std::string working_directory;
+  cmProcessOutput::Encoding encoding = cmProcessOutput::Auto;
   for (size_t i = 0; i < args.size(); ++i) {
     if (args[i] == "COMMAND") {
       doing_command = true;
@@ -128,6 +129,14 @@ bool cmExecuteProcessCommand::InitialPass(std::vector<std::string> const& args,
     } else if (args[i] == "ERROR_STRIP_TRAILING_WHITESPACE") {
       doing_command = false;
       error_strip_trailing_whitespace = true;
+    } else if (args[i] == "ENCODING") {
+      doing_command = false;
+      if (++i < args.size()) {
+        encoding = cmProcessOutput::FindEncoding(args[i]);
+      } else {
+        this->SetError(" called with no value for ENCODING.");
+        return false;
+      }
     } else if (doing_command) {
       cmds[command_index].push_back(args[i].c_str());
     } else {
@@ -223,7 +232,7 @@ bool cmExecuteProcessCommand::InitialPass(std::vector<std::string> const& args,
   int length;
   char* data;
   int p;
-  cmProcessOutput processOutput;
+  cmProcessOutput processOutput(encoding);
   std::string strdata;
   while ((p = cmsysProcess_WaitForData(cp, &data, &length, CM_NULLPTR), p)) {
     // Put the output in the right place.
diff --git a/Source/cmProcessOutput.cxx b/Source/cmProcessOutput.cxx
index 1440223..8b4d0e1 100644
--- a/Source/cmProcessOutput.cxx
+++ b/Source/cmProcessOutput.cxx
@@ -9,6 +9,21 @@ unsigned int cmProcessOutput::defaultCodepage =
   KWSYS_ENCODING_DEFAULT_CODEPAGE;
 #endif
 
+cmProcessOutput::Encoding cmProcessOutput::FindEncoding(std::string name)
+{
+  Encoding encoding = Auto;
+  if (name == "UTF8") {
+    encoding = UTF8;
+  } else if (name == "NONE") {
+    encoding = None;
+  } else if (name == "ANSI") {
+    encoding = ANSI;
+  } else if (name == "OEM") {
+    encoding = OEM;
+  }
+  return encoding;
+}
+
 cmProcessOutput::cmProcessOutput(Encoding encoding, unsigned int maxSize)
 {
 #if defined(_WIN32)
diff --git a/Source/cmProcessOutput.h b/Source/cmProcessOutput.h
index 6a4e7d5..6046f57 100644
--- a/Source/cmProcessOutput.h
+++ b/Source/cmProcessOutput.h
@@ -27,6 +27,13 @@ public:
     OEM
   };
 
+  /**
+  * Find encoding enum value for given encoding \a name.
+  * \param name a encoding name.
+  * \return encoding enum value or Auto if \a name was not found.
+  */
+  static Encoding FindEncoding(std::string name);
+
   /// The code page that is used as internal encoding to which we will encode.
   static unsigned int defaultCodepage;