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Message-ID: <879A5AD5DD0ED511891F0003473A9B560E23F74A@Z011004>
From: Jan.Materne@rzf.fin-nrw.de
To: user@ant.apache.org
Subject: AW: Way for buildfile to verify that Ant version is 1.5.2 or grea
	ter ?
Date: Fri, 22 Oct 2004 08:05:00 +0200
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A non usual way is checking for the existing of special classes.
So you 'only' have to check which classes were added in a release and
you could check for them.

Alternativly I can send two scriptdef=B4s I wrote in that area.
"checkAnt" parses the ${ant.version} string and stores additional
information
(compile date - useful if you work with cvs-versions).
"needAnt" executes a <fail> if the actual version is lower than a =
required
one.


Jan


<project name=3D"common-define-checkAnt">
    <scriptdef name=3D"checkAnt" language=3D"javascript">
        <![CDATA[
            importClass(java.text.SimpleDateFormat);
            importClass(java.util.Locale);

            // String evaluation of 'ant.version' string
            // e.g: 'Apache Ant version 1.6beta3 compiled on December 5
2003'
            string   =3D project.getProperty("ant.version");
            version  =3D string.substring(string.indexOf("Ant =
version")+12,
string.indexOf("compiled on")-1);
            compiled =3D string.substring(string.indexOf("compiled =
on")+12);

            // Get the compiled date: 'December 5 2003'
            dateParser =3D new SimpleDateFormat("MMM d yyyy", =
Locale.US);
            compiledDate =3D dateParser.parse(compiled);

            compiledYear  =3D (new
SimpleDateFormat("yyyy")).format(compiledDate);
            compiledMonth =3D (new SimpleDateFormat("M")
).format(compiledDate);
            compiledDay   =3D (new SimpleDateFormat("d")
).format(compiledDate);

            project.setNewProperty("ant.version.number", version);
            project.setNewProperty("ant.version.compiled", compiled);
            project.setNewProperty("ant.version.compiled.year",
compiledYear);
            project.setNewProperty("ant.version.compiled.month",
compiledMonth);
            project.setNewProperty("ant.version.compiled.day", =
compiledDay);
        ]]>
    </scriptdef>
</project>


<project name=3D"common-define-needAnt">
    <scriptdef name=3D"needAnt" language=3D"javascript">
        <attribute name=3D"version"/>
        <![CDATA[
            needed =3D attributes.get("version");

            string =3D project.getProperty("ant.version");
            actual =3D string.substring(string.indexOf("Ant =
version")+12,
string.indexOf("compiled on")-1);

            neededInt =3D getInt(needed);
            actualInt =3D getInt(actual);

            verbose("Needed: " + needed + " --> " + neededInt);
            verbose("Actual: " + actual + " --> " + actualInt);

            check =3D false;
            if (actualInt >=3D neededInt) check =3D true;

            if (!check) {
                java.lang.System.out.println(" -- abbruch --");
                fail =3D project.createTask("fail");
                fail.setMessage("Needed Ant-Version (" + needed + ") =
not
available. Was: " + actual);
                fail.perform();
            }

            // convert the version string to int value for easier =
comparison
            function getInt(string) {
                if (string.equals("1.1"))   return 11;
                if (string.equals("1.2"))   return 12;
                if (string.equals("1.3"))   return 13;
                if (string.equals("1.4"))   return 14;
                if (string.equals("1.4.1")) return 14.1;
                if (string.equals("1.5"))   return 15;
                if (string.equals("1.5.1")) return 15.1;
                if (string.equals("1.5.2")) return 15.2;
                if (string.equals("1.5.3")) return 15.3;
                if (string.equals("1.5.4")) return 15.4;
                if (string.equals("1.5alpha"))  return 15.880;
                if (string.equals("1.6beta1"))  return 15.991;
                if (string.equals("1.6beta2"))  return 15.992;
                if (string.equals("1.6beta3"))  return 15.993;
                if (string.equals("1.6"))       return 16;
                if (string.equals("1.6.0")  )   return 16;
                if (string.equals("1.6.1")  )   return 16.1;
                if (string.equals("1.6.2")  )   return 16.2;
                if (string.equals("1.6.3")  )   return 16.3;
                if (string.equals("1.7alpha"))  return 16.880;
                if (string.equals("1.7beta"))   return 16.990;
                if (string.equals("1.7"))       return 17;
                if (string.equals("1.7.0"))     return 17;
                if (string.equals("1.7.1"))     return 17.1;
                if (string.equals("1.7.2"))     return 17.2;
                return 0;
            }

            // log-message
            function verbose(msg) {
                project.log("[needAnt]  " + msg, project.MSG_VERBOSE);
            }
        ]]>
    </scriptdef>
</project>


> -----Urspr=FCngliche Nachricht-----
> Von: Rich Wagner [mailto:rich.wagner@savaJe.com]
> Gesendet am: Donnerstag, 21. Oktober 2004 21:08
> An: user@ant.apache.org
> Cc: rich.wagner@savaJe.com
> Betreff: Way for buildfile to verify that Ant version is 1.5.2 or
> greater ?
> Note that comparing "ant.version" to "1.5.2" for equality is NOT=20
> sufficient, since - for instance - a build should NOT fail if the ant =

> version is 1.6.1.
>=20
> Is there an easier way to get what I want than (say) writing my own=20
> custom task to parse "ant.version" and compare the major, minor, etc. =

> version numbers ?

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