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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 20093] New: - Cannot add condition under <project> scope
Date Wed, 21 May 2003 05:59:20 GMT
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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=20093

Cannot add condition under <project> scope

           Summary: Cannot add condition under <project> scope
           Product: Ant
           Version: 1.5.3
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: Core
        AssignedTo: dev@ant.apache.org
        ReportedBy: e17x-o9j5@spamex.com


Conceptually, I think you should be able to use <condition> task
at the <project> scope the same as you can use <property> type.
In this case, it seems very arbitary as to what considered a task
and what is considered a type. It appears to be an artifact of the
design.  Look at the <selector> type which is allowed to be at the
<project> scope. It does a similar thing as <condition> except for
files instead of properties.

Please consider making <condition> a core type rather than a task.

I wanted to set some properties conditionally, and then
load a property file "properties/project.txt" which sets
more properties based on the ${BUILD_DIR} property.

Since <condition> is a task, I cannot put it directly under
the <project> but instead I have to put it inside a task.

So, I created an "init" target and inside there I can add
the <conditions> and then load the properties and then
all my other tasks can depend on "init" target.

This works fine except that I also need to initialize some
filesets which use those properties for use in several targets.
I used to have these filesets defined directly under <project>
tag and then they were available using refid="filesetname".
However, now that I set the properties in "init" task, I have
to define the filesets later. When I define the filesets in
the "init" task, I found that the refids were not valid in
the targets, e.g. "compile" that depended on "init".  The
only workaround I have found is to redefine the filesets in
each target "compile", "install", etc. but that is really ugly.

<?xml version="1.0"?>
<project name="sample" default="compile" >
<property file="${basedir}/properties/local_unix.txt"/>
<property file="${basedir}/properties/local_windows.txt"/>

<condition name="BUILD_DIR" value="${UNIX_BUILD_DIR}">
  <os name="unix"/>
</condition>

<condition name="BUILD_DIR" value="${WINDOWS_BUILD_DIR}">
  <os name="windows"/>
</condition>

<property file="${basedir}/properties/build.txt"/>
<path id="classpath">
    ....
</path>

------------ATTEMPTED WORKAROUND. PROBLEM WITH "classpath"-----------
<?xml version="1.0"?>
<project name="sample" default="compile" >
<property file="${basedir}/properties/local_unix.txt"/>
<property file="${basedir}/properties/local_windows.txt"/>

<target name="init">
  <condition name="BUILD_DIR" value="${UNIX_BUILD_DIR}">
    <os name="unix"/>
  </condition>

  <condition name="BUILD_DIR" value="${WINDOWS_BUILD_DIR}">
    <os name="windows"/>
  </condition>
  <property file="${basedir}/properties/build.txt"/>
  <!-- This doesn't work. Cannot refer to "classpath" in compile target -->
  <path id="classpath">
    ....
  </path>
</target>

<target name="compile" depends="init" >
....

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