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From "Dominique Devienne" <ddevie...@gmail.com>
Subject Re: Trying to do things the "Ant way"
Date Fri, 28 Jul 2006 16:25:22 GMT
BTW, in -deploy-all, I usually set these properties as

<property name="deploy-type==A" value="doesn't matter" />

To emphasis the fact that it's the properties existence that matters,
not it's value (because that's what target's if/unless check). --DD

On 7/28/06, Dominique Devienne <ddevienne@gmail.com> wrote:
> You can do something like:
>
> target deploy-A if "deploy-type==A"
> target deploy-B if "deploy-type==B"
>
> target deploy depends -check-deploy, deploy-A, deploy-B, etc...
> target deploy-all depends -deploy-all, deploy
>
> target -check-deploy
>  condition ${deploy-type} equals "A" set property "deploy-type==A"
>  condition ${deploy-type} equals "B" set property "deploy-type==B"
>  etc...
>
> target -deploy-all
>  set property "deploy-type==A"
>  set property "deploy-type==B"
>  etc...
>
> This avoid's <antcall>, and follows Ant's canonical way to control
> target execution using properties. --DD
>
> On 7/28/06, Andrew Goktepe <andrewgoktepe@gmail.com> wrote:
> > There is a loss of performance when you use antcall in large,
> > complex builds. It also makes target dependencies less clear. But it's the
> > only way I know of to call a specific target based on a value obtained at
> > runtime. In most other cases, it's much better to use the 'depends'
> > attribute of 'target' with the exact target names.
> >
> > To achieve a deploy-all case, you could have a separate target (optimally in
> > a separate script) that makes 'ant' calls into the main deployment script:
> >
> > <target name="deploy-all">
> >    <ant antfile="mydeploymentscript.xml" inheritAll="false">
> >        <property name="envname" value="stage" />
> >    </ant>
> >    <ant antfile="mydeploymentscript.xml" inheritAll="false">
> >        <property name="envname" value="integ" />
> >    </ant>
> >
> >    ... etc
> > </target>
> >
> > -Andrew
> >
> > On 7/28/06, Jamie Jackson <myspamb8@gmail.com> wrote:
> > >
> > > Thanks for the quick response. I have a couple of follow-ups.
> > >
> > > I've gotten the impression from reading other posts that <antcall> is
to
> > > be
> > > avoided, so I'm wondering about its use here.
> > >
> > > The other question I have is: How would I satisfy the deploy-all use case
> > > while reusing as much of the script as practical?
> > >
> > > Thanks again,
> > > Jamie
> > >
> > > On 7/28/06, Andrew Goktepe <andrewgoktepe@gmail.com> wrote:
> > > >
> > > > Oops. s/<properties file/<property file/
> > > >
> > > > On 7/28/06, Andrew Goktepe <andrewgoktepe@gmail.com> wrote:
> > > > >
> > > > >  We use a separate properties file for each environment, and have
> > > common
> > > > > property names. Instead of integ.transfertype, stage.transfertype,
> > > etc,
> > > > I
> > > > > would just have 'transfertype' and it would have different values
in
> > > the
> > > > > different files. Then the Ant script has targets based on the possible
> > > > > values of the property, and one generic parent target that calls
them.
> > > > >
> > > > > Example:
> > > > > <properties file="${envname}.properties" />
> > > > > <target name="deploy">
> > > > >     <antcall target="deploy-${transfertype}" />
> > > > > </target>
> > > > > <target name="deploy-nfs"> ... </target>
> > > > > <target name="deploy-ssh"> ... </target>
> > > > >
> > > > > envname determines which environment-specific properties file needs
to
> > > > be
> > > > > read.
> > > > >
> > > > > This is a more scalable solution. Adding a new environment is as
> > > simple
> > > > as
> > > > > creating a new properties file.
> > > > >
> > > > > This assumes the build has already occurred and you can make run
the
> > > > > deployment Ant script separately for each environment.
> > > > >
> > > > > -Andrew
> > > > >
> > > > > On 7/28/06, Jamie Jackson <myspamb8@gmail.com> wrote:
> > > > > >
> > > > > > I'm having a problem trying to grok the "ant way" to do things
(i.e
> > > .,
> > > > > > without conditionals). I just got started with Ant a couple
days
> > > ago,
> > > > so
> > > > > >
> > > > > > take that into consideration.
> > > > > >
> > > > > > I'm trying to produce a well-factored script to handle code
> > > deployment
> > > > > > to
> > > > > > remote servers.
> > > > > >
> > > > > > Tasks:
> > > > > > *  deploy-integ
> > > > > > *  deploy-stage
> > > > > > *  deploy-prod
> > > > > > *  deploy-all (all of the above)
> > > > > >
> > > > > > Here's the problem: Depending on the set of servers, some are
> > > > available
> > > > > > via
> > > > > > SSH, others are available via NFS, and I'd like the script to
be
> > > > > > generalizable enough to specify the transfer type in the properties
> > > > > > file,
> > > > > > along with the (potentially) varying paths among servers.
> > > > > >
> > > > > > Here's a stab at the properties file:
> > > > > > -----------------------------------
> > > > > > svn.url=http://myhost/myrepos/myproj
> > > > > >
> > > > > > integ.transfertype=nfs
> > > > > > stage.transfertype=ssh
> > > > > > prod.transfertype=ssh
> > > > > >
> > > > > > # a nfs basepath would look like //webdev/websites
> > > > > > # an ssh basepath would look like username@hostname:/path/to/docroot
> > > > > > integ.basepath=//devserver/docroot
> > > > > > stage.basepath=username@hostname :/path/to/docroot
> > > > > > prod.basepath=username@hostname:/path/to/docroot
> > > > > >
> > > > > > integ.proj.wwwroot=childwelfare
> > > > > > stage.proj.wwwroot=childwelfare
> > > > > > prod.proj.wwwroot=childwelfare
> > > > > > ---------------------------------
> > > > > >
> > > > > > Here are a couple of the salient tasks (see inline comments):
> > > > > >
> > > > > >    <target name="deploy-integ">
> > > > > >        <deploy basepath="integ.basepath" proj.wwwroot="
> > > > > > integ.proj.wwwroot"
> > > > > > transfertype="integ.transfertype" />
> > > > > >    </target>
> > > > > >
> > > > > >    <macrodef name="deploy">
> > > > > >        <attribute name="args" />
> > > > > >        <attribute name="basepath" />
> > > > > >        <attribute name="proj.wwwroot" />
> > > > > >        <attribute name="transfertype" />
> > > > > >        <!-- I'd like to do it the "right way, and avoid "if",
but
> > > > don't
> > > > > > know how -->
> > > > > >        <!-- Not to mention that I can't even put the "if"
in
> > > macrodef,
> > > > > > so
> > > > > > it doesn't work anyway -->
> > > > > >        <if>
> > > > > >            <equals arg1="@{transfertype}" arg2="ssh" />
> > > > > >            <then>
> > > > > >                <property name="@{args}" value="-e ssh -Cacvz
@{
> > > > > > local.buildDir}/* @{basepath}/@{proj.wwwroot}" />
> > > > > >            </then>
> > > > > >            <else>
> > > > > >                <property name="@{args}" value="-av @{local.buildDir
> > > }/
> > > > > > @{basepath}/@{proj.wwwroot}/" />
> > > > > >            </else>
> > > > > >        </if>
> > > > > >        <echo message="rsync ${args}" />
> > > > > >        <exec executable="rsync">
> > > > > >            <arg line="${args}" />
> > > > > >        </exec>
> > > > > >    </macrodef>
> > > > > >
> > > > > > What's the right approach?
> > > > > >
> > > > > > Thanks,
> > > > > > Jamie
> > > > > >
> > > > > >
> > > > >
> > > >
> > > >
> > >
> > >
> >
> >
>

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