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To: dev@ant.apache.org
Subject: DO NOT REPLY [Bug 35929]  New:  -
    replace property values each time <echo> is executed
Message-Id: <20050729132642.0E62AE0@ajax.apache.org>
Date: Fri, 29 Jul 2005 15:26:42 +0200 (CEST)

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http://issues.apache.org/bugzilla/show_bug.cgi?id=35929

           Summary: replace property values each time <echo> is executed
           Product: Ant
           Version: 1.6.2
          Platform: PC
        OS/Version: Windows XP
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: Core tasks
        AssignedTo: dev@ant.apache.org
        ReportedBy: luisgois@netvisao.pt


I have a target which echoes a property value that stores the name of the parent
target (the target executing the current target). Such property value is
obviously updated each time a target is called. 

This is no problem e.g. for <subant>, since the property value is evaluated each
time, but for other tasks, like <echo>, the properties in the message/text are
evaluated/replaced only once and not each time the task is executed.

Is this the expected behaviour or it can be freely changed?

I've performed the following changes to "fix" this behaviour :

    protected String messageUnreplaced = ""; // required

    /**
     * Message to write.
     *
     * @param msg Sets the value for the message variable.
     */
    public void setMessage(String msg) {
        // LG
        this.messageUnreplaced = msg;

        this.message = msg;
    }

    /**
     * Does the work.
     *
     * @exception BuildException if something goes wrong with the build
     */
    public void execute() throws BuildException {
        // LG
        message = getProject().replaceProperties(messageUnreplaced);

        if (file == null) {
            log(message, logLevel);
        } else {
            FileWriter out = null;
            try {
                out = new FileWriter(file.getAbsolutePath(), append);
                out.write(message, 0, message.length());
            } catch (IOException ioe) {
                throw new BuildException(ioe, getLocation());
            } finally {
                if (out != null) {
                    try {
                        out.close();
                    } catch (IOException ioex) {
                        //ignore
                    }
                }
            }
        }
    }

    /**
     * Set a multiline message.
     * @param msg the CDATA text to append to the output text
     */
    public void addText(String msg) {
        // LG
        messageUnreplaced += msg;

        message += getProject().replaceProperties(msg);
    }

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