O great Ant gurus :-) I seek a clean way to perform operating-system
dependent operations with a fail-safe check in case the O/S isn't
supported. Is there already an idiom out there for this?
Here's what I have come up with so far:
<target name="projecthelp" description="Usage">
<condition property="projecthelp_target"
value="projecthelp_unix">
<os family="unix"/>
</condition>
<condition property="projecthelp_target"
value="projecthelp_windows">
<os family="windows"/>
</condition>
<condition property="projecthelp_target"
value="projecthelp_fail">
<not>
<or>
<os family="unix"/>
<os family="windows"/>
</or>
</not>
</condition>
<antcall target="${projecthelp_target}"/>
</target>
<target name="projecthelp_unix">
<exec dir="${ant_loc}" taskname="" executable="ant" os="Linux">
<arg line="-projecthelp"/>
</exec>
</target>
<target name="projecthelp_windows">
<exec dir="${ant_loc}" taskname="" executable="cmd.exe"
os="Windows 2000">
<arg line="/c ant -projecthelp"/>
</exec>
</target>
<target name="projecthelp_fail">
<fail message="The projecthelp target is not yet configured for
this O/S"/>
</target>
I don't like the replication of the O/S names (unix and windows) in the
above. I'm strongly opposed to needless redundancy, and really wish I
could avoid it here.
FYI, we use the above in our "Queen Ant" script to encapsulate using the
-projecthelp output of Ant as the default "target" when Ant is invoked
(i.e. no target -> usage). Calling scripts look like this:
<?xml version="1.0"?>
<project name="common" default="projecthelp">
:
<target name="projecthelp">
<ant antfile="${QUEEN_ANT}" target="projecthelp">
<property name="ant_loc" value="${my_dir}"/>
</ant>
</target>
:
I'm particularly interested in better ways to do the first snippet above
WITHOUT the O/S name repetition. But I'm open to comments, suggestions,
ideas, etc. about either excerpt. Thanks!
Extra Credit: Anyone know why <exec> and <condition> use two different
sets of names for O/Ses? I know THAT they do; I'm curious about WHY...
--
To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]>
For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
