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Message-ID: <556ED159.3090007@gmx.com>
Date: Wed, 03 Jun 2015 14:05:13 +0400
From: Maarten  Boekhold <boekhold@gmx.com>
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To: users@groovy.incubator.apache.org
Subject: Disguise groovy script as windows batch file
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Hi all,

Based on http://snipplr.com/view/70875

The following works with groovy 2.1.8, but fails with 2.3.7 or 2.4.3:

    @ECHO OFF
    REM = /
    REM dummy groovy statement in first line and dummy groovy assignment
    to dummy string var rem
    SET _JAVA_OPTIONS=
    SET CLASSPATH=
    C:\Maarten\local\groovy-2.1.8\bin\groovy "%~dp0%~nx0" %*
    GOTO :EOF
    /
    interface ECHO {}
    // dummy groovy interface/annotation to make groovy interpreter
    ignore first line
    // start of script

    println "### Hello World from Groovy"
    System.exit(0)

When I run this with groovy 2.3.7 or 2.4.3, I get:

    org.codehaus.groovy.control.MultipleCompilationErrorsException:
    startup failed:
    C:\Maarten\tg.bat: 1: class ECHO is not an annotation in @ECHO
      @ line 1, column 1.
        @ECHO OFF
        ^

    1 error

Is there any way to make this work on recent versions of Groovy? The 
idea here is to have a groovy script that I can launch directly from a 
CMD prompt without needing to have groovy in the path, type "groovy 
thescript.groovy" or using a wrapper .bat file.

The definition of "interface ECHO {}" is there to make groovy ignore the 
first line of the file, by tricking it into thinking it is an annotation 
on the assignment to the REM variable.

Maarten

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    <meta http-equiv="content-type" content="text/html; charset=utf-8">
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  <body bgcolor="#FFFFFF" text="#000000">
    Hi all,<br>
    <br>
    Based on <a class="moz-txt-link-freetext" href="http://snipplr.com/view/70875">http://snipplr.com/view/70875</a><br>
    <br>
    The following works with groovy 2.1.8, but fails with 2.3.7 or
    2.4.3:<br>
    <br>
    <blockquote><small><font face="Courier New, Courier, monospace">@ECHO
          OFF<br>
          REM = /<br>
          REM dummy groovy statement in first line and dummy groovy
          assignment to dummy string var rem<br>
          SET _JAVA_OPTIONS=<br>
          SET CLASSPATH=<br>
          C:\Maarten\local\groovy-2.1.8\bin\groovy "%~dp0%~nx0" %*<br>
          GOTO :EOF<br>
          /<br>
          interface ECHO {}<br>
          // dummy groovy interface/annotation to make groovy
          interpreter ignore first line<br>
          // start of script<br>
           <br>
          println "### Hello World from Groovy"<br>
          System.exit(0)<br>
          <br>
        </font></small></blockquote>
    When I run this with groovy 2.3.7 or 2.4.3, I get:<br>
    <br>
    <blockquote><small>org.codehaus.groovy.control.MultipleCompilationErrorsException:
        startup failed:<br>
        C:\Maarten\tg.bat: 1: class ECHO is not an annotation in @ECHO<br>
         @ line 1, column 1.<br>
           @ECHO OFF<br>
           ^<br>
        <br>
        1 error<br>
      </small></blockquote>
    Is there any way to make this work on recent versions of Groovy? The
    idea here is to have a groovy script that I can launch directly from
    a CMD prompt without needing to have groovy in the path, type
    "groovy thescript.groovy" or using a wrapper .bat file.<br>
    <br>
    The definition of "interface ECHO {}" is there to make groovy ignore
    the first line of the file, by tricking it into thinking it is an
    annotation on the assignment to the REM variable.<br>
    <br>
    Maarten<br>
  </body>
</html>

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