Add caf & cafrun batchfile wrapper scripts on windows

These scripts get configured to call the bash version found during
CMake configuration time. Using this version/installation of bash, the
batch files call the corresponding bash caf & cafrun scripts and pass
all arguments through. This *should* allow things like fpm to work
with the caf wrapper scripts, *I beleive* (untested)

CAVEAT: WSL's bash will dump you into your WSL home directory and
there's no obvious work around. If you put Git-Bash's bash.exe (in the
bin subdirectory) first on your path you *should* be in business (I
think). There may be weird edge cases.

Author: zbeekman

src/extensions/caf.bat.in

@@ -0,0 +1,4 @@
+@REM Batch file wrapper script to call the caf bash script on windows
+@REM %~dp0 is the directory of the batch script. This assumes caf.bat in same dir as caf
+
+"@BASH_EXECUTABLE@" "%~dp0caf" %*

src/extensions/cafrun.bat.in

@@ -0,0 +1,4 @@
+@REM Batch file wrapper script to call the cafrun bash script on windows
+@REM %~dp0 is the directory of the batch script. This assumes cafrun.bat in same dir as cafrun
+
+"@BASH_EXECUTABLE@" "%~dp0cafrun" %*

src/mpi/CMakeLists.txt

@@ -356,10 +356,25 @@ endif()
 configure_file("${CMAKE_SOURCE_DIR}/src/extensions/cafrun.in" "${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_BINDIR}/cafrun"
   @ONLY)
 
-install(PROGRAMS "${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_BINDIR}/cafrun"
+install(PROGRAMS
+  "${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_BINDIR}/cafrun"
   "${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_BINDIR}/caf"
   DESTINATION "${CMAKE_INSTALL_FULL_BINDIR}")
 
+if(WIN32)
+  # Add the batch script wrappers
+  configure_file(
+    "${CMAKE_SOURCE_DIR}/src/extensions/caf.bat.in" "${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_BINDIR}/caf.bat"
+    @ONLY)
+  configure_file(
+    "${CMAKE_SOURCE_DIR}/src/extensions/cafrun.bat.in" "${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_BINDIR}/cafrun.bat"
+    @ONLY)
+  install(PROGRAMS
+    "${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_BINDIR}/cafrun.bat"
+    "${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_BINDIR}/caf.bat"
+    DESTINATION "${CMAKE_INSTALL_FULL_BINDIR}")
+endif()
+
 lint_script("${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_BINDIR}" caf)
 check_script_style("${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_BINDIR}/caf")
 lint_script("${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_BINDIR}" cafrun)