@echo off
@rem
@rem runperl.bat
@rem
@rem Runs "perl %1" and checks for an output file %2.
@rem
@rem The perl program is located using "ftype" or the PATH. This is
@rem likely to be ActiveState perl rather than MSYS or Cygwin, and
@rem for ActiveState the perl script sees a $^O value of "MSWin32".
@rem

@rem find perl using ftype
SET RUNPERL_PERL=
for /f "tokens=2 delims== " %%I in ('ftype perl') do set RUNPERL_PERL=%%~I
IF "%RUNPERL_PERL%"=="" goto no_ftype
IF NOT EXIST "%RUNPERL_PERL%" goto no_ftype

@rem run the ftype perl
IF EXIST %2 del /f %2
for /f "tokens=2 delims== " %%I in ('ftype perl') do %%I %1 %3 %4 %5
goto done

@rem find perl on the path
:no_ftype
perl -e "exit 10"
if errorlevel 11 goto fail_no_perl
if not errorlevel 10 goto fail_no_perl

@rem run perl on the path
IF EXIST %2 del /f %2
perl %1 %3 %4 %5
goto done

@rem after running perl check for the touchfile
:done
IF NOT EXIST "%2" goto fail_no_touchfile
echo done
goto end

@rem error if no perl
:fail_no_perl
echo error: failed to find perl: please install ActiveState perl
goto end

@rem error if no touchfile
:fail_no_touchfile
echo error: perl command failed to create an output file
goto end

:end
pause