My current proposal for the Clojure DSL for polyglot maven looks like this:
------------------------------------------------------------------
(defproject com.linkuistics.lamdras/website "1.0-SNAPSHOT"
:model-version "4.0.0"
:name "Lamdras Website"
:description "Acumen / LRMDS Integration"
:packaging "war"
:properties {:project.build.sourceEncoding "UTF-8"}
:dependencies [[ring/ring-servlet "0.2.0-RC2"]
[ring/ring-devel "0.2.0-RC2"]
[clj-routing/clj-routing "0.1.0-SNAPSHOT"]
[clout/clout "0.2.0-SNAPSHOT"]
[compojure "0.4.0-SNAPSHOT"]
[hiccup "0.1.0-SNAPSHOT"]
[org.clojure/clojure "1.2.0-master-SNAPSHOT"]
[org.clojure/clojure-contrib "1.2.0-master-SNAPSHOT"]
[congomongo "0.1.2-SNAPSHOT"]]
:provided-dependencies [[org.mortbay.jetty/servlet-api-2.5 "6.1.14"]]
:final-name "website"
:plugins [[org.apache.maven.plugins/maven-war-plugin "2.1-beta-1"]
[org.apache.maven.plugins/maven-compiler-plugin "2.1" :source
"1.6" :target "1.6"]
[com.theoryinpractise/clojure-maven-plugin "1.3.1"
:sourceDirectories ["src/main/java"]
[:compile-clojure [compile ["compile"]]]]
[org.mortbay.jetty/maven-jetty-plugin "6.1.10"
:scanIntervalSeconds 10 :stopKey "foo" :stopPort 9999]])
------------------------------------------------------------------
With logical extension to other maven properties. Note that the configuration
items for plugins and their executions are inlined, and the executions for
plugins appear as the vector item in the plugin declaration.
When the group id is the same as the artifact id you can omit the group id.
Configuration items such as :sourceDirectories that have a vector value are
equivalent to this xml:
<sourceDirectories><sourceDirectory>src/main/java</sourceDirectory></sourceDirectories>
An example showing qualifiers and exclusions for dependencies (taken from the
pom.xml for the top level of polyglot maven itself) is:
------------------------------------------------------------------
(defproject org.sonatype.pmaven/pmaven "0.8-SNAPSHOT"
:model-version "4.0.0"
:parent [org.sonatype.forge/forge-parent "5"]
:name "Polyglot Maven"
:packaging "pom"
:url "http://polyglot.sonatype.org/";
:properties {:forgeSiteId "forge-sites"
:mavenVersion "3.0-alpha-7"
:project.build.sourceEncoding "UTF-8"
:forgeSiteUrl
"dav:http://repository.sonatype.org/content/sites/forge-sites/${project.artifactId}/${project.version}"}
:scm {:connection "scm:git:git://github.com/sonatype/polyglot-maven.git"
:developer-connection
"scm:git:ssh://g...@github.com/sonatype/polyglot-maven.git"
:tag "HEAD"
:url "http://github.com/sonatype/polyglot-maven"}
:ci-management {:system "Hudson"
:url "https://grid.sonatype.org/ci/job/Polyglot-Maven"}
:issue-management {:system "JIRA"
:url "https://issues.sonatype.org/browse/PMAVEN"}
:dependency-management {:dependencies [[org.apache.maven/apache-maven
"${mavenVersion}" :classifier "bin" :type "zip"]
[org.apache.maven/maven-model-builder "${mavenVersion}"]
[org.apache.maven/maven-embedder
"${mavenVersion}"]
[org.apache.maven/maven-plugin-api
"${mavenVersion}"]
[org.codehaus.groovy/groovy "1.7.0"
:exclusions [jline junit org.apache.ant/ant org.apache.ant/ant-launcher]]
[com.google.inject/guice "2.0"]
[org.sonatype.maven.shell/mvnsh-maven "0.10"]
[org.sonatype.gshell/gshell-core
"2.5" :classifier "tests"]
[org.sonatype.pmaven/pmaven-common
"0.8-SNAPSHOT"]
[org.sonatype.pmaven/pmaven-cli
"0.8-SNAPSHOT"]
[org.sonatype.pmaven/pmaven-maven-plugin "0.8-SNAPSHOT"]
[org.sonatype.pmaven/pmaven-groovy
"0.8-SNAPSHOT"]
[org.sonatype.pmaven/pmaven-yaml
"0.8-SNAPSHOT"]
[org.sonatype.pmaven/pmaven-jruby
"0.8-SNAPSHOT"]
[org.sonatype.pmaven/pmaven-commands
"0.8-SNAPSHOT"]
[org.sonatype.pmaven/pmaven-clojure
"0.8-SNAPSHOT"]
[org.sonatype.pmaven/pmaven-scala
"0.8-SNAPSHOT"]]}
:test-dependencies [[junit "4.7"]
org.codehaus.groovy/groovy]
:modules ["pmaven-common" "pmaven-maven-plugin" "pmaven-groovy"
"pmaven-yaml" "pmaven-clojure" "pmaven-jruby" "pmaven-scala" "pmaven-cli"
"pmaven-commands"]
:default-goal "install"
:plugins [[org.apache.maven.plugins/maven-surefire-plugin "2.5"
:redirectTestOutputToFile true
:forkMode
"once"
:argLine
"-ea"
:failIfNoTests false
:workingDirectory "${project.build.directory}"
:excludes
["**/Abstract*.java" "**/Test*.java"]
:includes
["**/*Test.java"]]
[org.apache.maven.plugins/maven-compiler-plugin "2.0.2" :source
"1.5" :target "1.5"]
[org.codehaus.gmaven/gmaven-plugin "1.2" :providerSelection "1.7"
[:default [["generateStubs" "compile" "generateTestStubs"
"testCompile"]]]]
[org.codehaus.plexus/plexus-component-metadata "1.5.1"
[:default [["generate-metadata" "generate-test-metadata"]]]]
[org.apache.maven.plugins/maven-release-plugin "2.0-beta-9"
:useReleaseProfile false
:goals "deploy"
:arguments "-B -Prelease"
:autoVersionSubmodules true]
[org.apache.maven.plugins/maven-scm-plugin "1.2"]])
------------------------------------------------------------------
Note that dependencies without version numbers aren't wrapped in vectors. This
is very common in child modules because the parent specifies the version
numbers, as shown above in the dependency-management section.
Things such as :packaging have sensible defaults (in that case, "jar"), and if
:model-version and :add-default-plugins is omitted then it will assume it is a
leiningen project.clj. Therefore leiningen input files are valid polyglot maven
input files. It isn't 100% or bidirectionally interoperable because a)
leiningen plugins don't work and b) leiningen can't take the full format. Given
all of the above, the following leiningen project.clj would be valid input to
polyglot maven:
------------------------------------------------------------------
(defproject org.clojars.the-kenny/clojure-couchdb "0.2"
:description "Simple Clojure interface to Apache CouchDB, fork of the original
project with function arguments instead of *server* and some other changes."
:dependencies [[org.clojure/clojure "1.1.0-master-SNAPSHOT"]
[org.clojure/clojure-contrib "1.0-SNAPSHOT"]
[org.clojure/clojure-http-client "1.0.0-SNAPSHOT"]]
:dev-dependencies [[lein-clojars "0.5.0-SNAPSHOT"]
[org.clojure/swank-clojure "1.0"]])
------------------------------------------------------------------
There's one wrinkle to do with :dev-dependencies, which need to be ignored, but
that's trivial.
Opinions on any of this? As long as plugins could be written in Clojure (and
Scala/Ruby/Groovy presumably), would current leiningen users use polyglot maven?
Antony Blakey
--------------------------
CTO, Linkuistics Pty Ltd
Ph: 0438 840 787
Reflecting on W.H. Auden's contemplation of 'necessary murders' in the Spanish
Civil War, George Orwell wrote that such amorality was only really possible,
'if you are the kind of person who is always somewhere else when the trigger is
pulled'.
-- John Birmingham, "Appeasing Jakarta"
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