Permit to invoke ign command in Windows

Signed-off-by: Silvio <silvio@traversaro.it>

src/CMakeLists.txt

@@ -54,6 +54,17 @@ configure_file(ign.in ${ign_script_configured})
 file(GENERATE OUTPUT ${ign_script_generated} INPUT ${ign_script_configured})
 install (PROGRAMS ${ign_script_generated} DESTINATION ${BIN_INSTALL_DIR})
 
+if(WIN32)
+  # On Windows also install the executable as ign 
+  # to permit to invoke ign via Git Bash 
+  # see https://github.com/ignitionrobotics/ign-tools/issues/70
+  install (PROGRAMS ${ign_script_generated} DESTINATION ${BIN_INSTALL_DIR} RENAME ign)
+
+  # On Windows also install the ign.bat wrapper script to permit to
+  # invoke ign via Command Prompt or Powershell
+  install (PROGRAMS ign.bat DESTINATION ${BIN_INSTALL_DIR})
+endif()
+
 #===============================================================================
 # BEGIN TEST ign command
 # Generate the ruby script for internal testing.

src/ign.bat

@@ -0,0 +1,6 @@
+@echo off
+REM %~dp0 is the directory in which this bat script is, see
+REM https://stackoverflow.com/questions/112055/what-does-d0-mean-in-a-windows-batch-file
+REM %* redirects the arguments to the output, see 
+REM https://serverfault.com/questions/22443/do-windows-batch-files-have-a-construction/22541#22541
+ruby %~dp0\ign %*