> OK, now that Ant1.6 has antlibs, it is time to think of the
> next step:
> auto download of antlibs and (perhaps) dependencies.
>
> 1. Possible requirements
>
> -allow users to specify the URLs of dependent antlibs
Why only AntLibs? Maybe resources in general (jars, AntLets, ...)
> -allow teams to provide an override point that specifies their location
of course :-)
I wrote a snippet for the download :-)
<project name="common-define-require">
<scriptdef name="require" language="javascript">
<attribute name="file"/>
<attribute name="url"/>
<![CDATA[
// If 'file' is not present, download it from 'url'.
// Maybe you have to set the proxy before with <setproxy>
f = new java.io.File(attributes.get("file"));
if (!f.exists()) {
url = new java.net.URL(attributes.get("url"));
get = project.createTask("get");
get.setDest(f);
get.setSrc(url);
get.execute();
}
]]>
</scriptdef>
</project>
<property name="ant.test.lib" value="ant-testutil.jar"/>
<import file="${antcommon.dir}/define-require.xml"/>
<require file="${ant.test.lib}"
url="http://gump.covalent.net/jars/latest/ant/${ant.test.lib}"/>
> -secure download -only files from trusted sources are fetched.
- download the MD5 file and check for consistency
Have that :-)
But it´s longer so see at the buttom
> -caching of downloads, global or per-user
or per-project
> -go through proxies
> -allow antlib providers to move their files (handle redirects)
> -allow antlib providers to mirror, by having a mirror file that lists
> possible sources
> -support private repositories (intranet/internet, https,
> authenticated)
> as well as public sources
> -make it easy to publish an antlib, and register it in the
> ant central list
I had only a half ear on the thread, but Forrest a feature like
"autodownload
skin" which sounds like the whole stuff here ...
> Anything else?
Be open to plug in another kind of repo. Not only file based. Maybe
a scm tool (cvs, ...).
>
> 2. What things implement this? What do Maven and Ruper do?
Yep. Talk with them. Maybe we can get their code ... or decide not to do
anything ...
> 3. do we want to integrate this with ant, or have some more standalone
> tool that can be used to keep a component repository up to date, a tool
> with an ant task for use in a build file. A sort of apt-getfor apache
> stuff...
More something in the middle: an AntLib.
Jan
check-downloads.xml
------------------------------------------
<project default="main">
<taskdef resource="net/sf/antcontrib/antcontrib.properties"/>
<property name="result.file"
value="check-downloads-results.properties"/>
<property file="check-downloads.properties"/>
<property file="${result.file}"/>
<target name="main">
<setproxy proxyHost="${proxy.host}" proxyPort="${proxy.port}"/>
<foreach list="${file.list}" param="file" target="checkFile"/>
</target>
<target name="checkFile"
depends="check.download,check.md5-1,check.md5-2" if="file"/>
<target name="check.init">
<property name="zip.file" value="${file}"/>
<property name="md5.file" value="${file}.md5"/>
<condition property="md5-ok"><isset
property="${zip.file}.isValid"/></condition>
<condition property="download-ok">
<and>
<available file="${dest.dir}/${zip.file}"/>
<available file="${dest.dir}/${md5.file}"/>
</and>
</condition>
</target>
<target name="check.download" unless="download-ok" depends="check.init">
<echo>Download ${md5.file}</echo>
<get src="${download.md5.dir}/${md5.file}"
dest="${dest.dir}/${md5.file}"/>
<echo>Download ${zip.file}</echo>
<get src="${download.zip.dir}/${zip.file}"
dest="${dest.dir}/${zip.file}"/>
</target>
<target name="check.md5-1" if="md5-ok" depends="check.init">
<echo>${zip.file}: just processed</echo>
</target>
<target name="check.md5-2" unless="md5-ok" depends="check.init">
<trycatch><try>
<!-- what is the valid md5 value specified in the md5 file -->
<loadfile srcFile="${md5.file}" property="md5.valid">
<filterchain>
<striplinebreaks/>
<tokenfilter>
<stringtokenizer/>
<replaceregex pattern="${zip.file}" replace=""/>
</tokenfilter>
<tokenfilter>
<trim/>
</tokenfilter>
</filterchain>
</loadfile>
<!-- what is the actual md5 value -->
<checksum file="${zip.file}" property="md5.actual"/>
<!-- compare them -->
<condition property="md5.isValid">
<equals arg1="${md5.valid}" arg2="${md5.actual}"/>
</condition>
<property name="md5.isValid" value="false"/>
<!-- print the result -->
<if>
<istrue value="${md5.isValid}"/>
<then>
<echo>${zip.file}: ok</echo>
<echo file="${result.file}"
append="true"
message="${zip.file}.isValid=true${line.separator}"/>
</then>
<else>
<echo>${zip.file}: Wrong MD5 checksum !!!</echo>
<echo>- expected: ${md5.valid}</echo>
<echo>- actual : ${md5.actual}</echo>
<move file="${zip.file}"
tofile="${zip.file}.wrong-checksum"/>
</else>
</if>
</try><catch/></trycatch>
</target>
</project>
check-downloads.properties
--------------------------
download.zip.dir=ftp://sunsite.informatik.rwth-aachen.de/pub/mirror/eclipse/
S-3.0M5-200311211210/
download.md5.dir=ftp://sunsite.informatik.rwth-aachen.de/pub/mirror/eclipse/
S-3.0M5-200311211210/checksum/
dest.dir=.
file.list=eclipse-Automated-Tests-3.0M5.zip,eclipse-FTP-WebDAV-3.0M5.zip,ecl
ipse-JDT-3.0M5.zip,eclipse-SDK-3.0M5-win32.zip,eclipse-examples-3.0M5-win32.
zip,eclipse-examples-3.0M5.zip,eclipse-platform-3.0M5-win32.zip
proxy.host=A011-34
proxy.port=8080
