copy @cpcloud's solution to build numbers

conda.recipe/bld.bat

@@ -1,16 +1,7 @@
+@echo off
 
 SET BLD_DIR=%CD%
 cd /D "%RECIPE_DIR%\.."
-
-"%PYTHON%" setup.py install
-
-REM # X.X.X.dev builds
 FOR /F "delims=" %%i IN ('git describe --tags') DO set BCOLZ_VERSION=%%i
-set _result=%BCOLZ_VERSION:-=_%
-
-echo %_result%>__conda_version__.txt
-
-copy __conda_version__.txt "%BLD_DIR%"
-
-if errorlevel 1 exit 1
-
+echo.%BCOLZ_VERSION% | %PYTHON% .\conda.recipe\version.py > %SRC_DIR%\__conda_version__.txt
+%PYTHON% setup.py --quiet install

conda.recipe/build.sh

@@ -7,10 +7,9 @@ SRC_DIR=$RECIPE_DIR/..
 pushd $SRC_DIR
 
 # X.X.X.dev builds
-version=`git describe --tags`
-u_version=`echo $version | tr "-" _`
+u_version=`git describe --tags | $PYTHON $SRC_DIR/conda.recipe/version.py`
 
-echo $u_version> __conda_version__.txt
+echo $u_version > __conda_version__.txt
 
 cp __conda_version__.txt $BLD_DIR