I have a problem with gradle's task dependencies.
I have a version.properties file which must be cleared (on clean task) or filled (on war task) with a version info.
Therefore I set this dependency :
clean.dependsOn clearVersionProperties
and
processResources.dependsOn ([defaultValues,infoEnv])
compileJsps.dependsOn(classes, tomcatJasper, xmlModify)
war.dependsOn(compileJsps, svnRevision, writeVersionProperties)
My tasks have been externalized in a commons.gradle and look like this:
...
def writeVersionFile(String whatToWrite) {
File f = new File(project.webAppDirName+'/WEB-INF/version.properties');
if (f.exists()) { f.delete(); }
f = new File(project.webAppDirName+'/WEB-INF/version.properties');
FileOutputStream os = new FileOutputStream(f);
os.write(whatToWrite.getBytes());
os.flush();
os.close();
}
task clearVersionProperties() {
println "Clearing version file"
String whatToWrite = "version=@version@"
writeVersionFile(whatToWrite)
}
task writeVersionProperties(dependsOn: svnRevision) {
println "Writing version file"
String whatToWrite = "version="+project.ext.revision;
writeVersionFile(whatToWrite)
}
...
From my understanding clean will now call clearVersionProperties and war will call writeVersionProperties.
But when I execute a gradle clean, the reactor plan looks like this :
C:\devtools\....\branches\merge\Application>gradle -bbuild20.gradle clean -Ptomcat=7 -Ptarget=live
To honour the JVM settings for this build a new JVM will be forked. Please consider using the daemon: http://gradle.org/
docs/2.0/userguide/gradle_daemon.html.
_______________________________________________________________________________
### building LIVE system
_______________________________________________________________________________
Clearing version file
Writing version file
JSP compilation...
TC7 Sources integrated
________________________________________________________
Compiling JSPs against Tomcat 7.0.11
________________________________________________________
:clearVersionProperties UP-TO-DATE
:clean UP-TO-DATE
BUILD SUCCESSFUL
Total time: 16.803 secs
Why are the tasks clearVersionProperties and writeVersionProperties executed, since they are bound to certain build phases? for example the task infoEnv is not executed, but - and this is really a problem - the task writeVersionProperties which only should be executed by the war task.
Any help appreciated!
in the meantime I found out why these tasks were fired :
I missed << after the task statement, so changing my two taks to
task clearVersionProperties() << {
println "Clearing version file"
String whatToWrite = "version=@version@"
writeVersionFile(whatToWrite)
}
task writeVersionProperties(dependsOn: [svnRevision]) << {
println "Writing version file"
String whatToWrite = "version="+project.ext.revision;
writeVersionFile(whatToWrite)
}
writeVersionProperties.mustRunAfter clearVersionProperties
This did the job.... I am not sure, if this is a bug, feature or side effect. But it seems to me the same utterly evil trap like forgetting () after a function.
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