User:Mizdebsk/PackagingGradle

Bootstrap plan

Plan for bootstrapping Gradle in Fedora.

People involved: Mikolaj Izdebski

Current state: during phase 2

Phase 1 (initial bootstrap)

• build rpm package containing upstream binaries
• rebuild Gradle from source
  • all dependencies coming from the Internet
• from now on:
  • Gradle can be installed from rpm
  • results: https://mizdebsk.fedorapeople.org/gradle/stage1/

Phase 2 (local mode)

• implement local mode using XMvn
• package all Gradle build dependencies in wrapper rpm
  • binaries taken from the Internet
  • XMvn metadata added
• from now on:
  • Gradle can be built in isolated environment without Internet access
  • new rpm packages can be created which use gradle as build system

Phase 3 (dependency refinement)

• while wrapper rpm is not empty:
  • pick one artifact from wrapper rpm
  • if it is not yet available in fedora:
    • build it from source and package it as rpm
    • skip tests if there are too many missing test dependencies
    • add any missing build or test dependencies to wrapper rpm
  • rebuild Gradle and run tests to make sure everything keeps working
  • if there are build or test failures, debug them and create patches
• get rid of wrapper rpm
• from now on:
  • Gradle with all dependencies are free from prebuilt binaries
  • everything is patched to work with artifact versions available in Fedora

Phase 4 (push to Fedora)

• request FPC bootstrap exception
• for all new packages:
  • do review (licensing etc)
  • cleanup spec file
  • submit for review
  • someone else reviews the package
  • package is checked into Fedora git and built in Koji
• from now on:
  • we have gradle in Fedora

Phase 5 (further improvements)

• implement javapackages macros for Gradle
• prepare packaging documentation
• announce gradle availability
• upstream patches
• enable tests (if skipped)

Blocker problems

• there is no public API for providing custom resolver
  • Ivy resolvers are not supported in Gradle 2.x
  • custom resolvers are internal within Gradle (org.gradle.api.internal)
  • this used to work for Gradle 1.x:

buildscript {
    dependencies {
        classpath files('/usr/share/java/xmvn/xmvn-connector-ivy.jar',
                        '/usr/share/java/xmvn/xmvn-launcher.jar',
                        '/usr/share/java/xmvn/xmvn-api.jar')
    }
}

repositories {
    add(new org.fedoraproject.xmvn.connector.ivy.IvyResolver())
}