A journey withTarget Platforms

Mickael Istria @mickaelistriaEclipseCon Europe 2012Licensed under CC-BY 3.0

“Which dependencies are available?”

Target Platforms...

Before Target-Platforms

PDE

EGit

MylynJBoss Tools 4.0

Eclipse Core 4.2

GMF Tooling

IDE

Depends onDoes NOT depend on

Depends on ANOTHER VERSION

PDE allows you to add dependency to any bundle from IDE

Default TP

Bundle B

Feature F

Workspace

Default Target-Platforms

PDE

EGit

MylynJBoss Tools 4.0

Eclipse Core 4.2

GMF Tooling

IDE

Depends onDoes NOT depend on

Depends on ANOTHER VERSION

PDE allows you to add dependency to any bundle from IDE

Default TP

Bundle B

Feature F

Workspace

Target-platforms

p2 Repo Ap2 Repo A● Bundle B1 (1.0.0)● Bundle B2 (1.0.0)● Feature F1 (1.0.0)

p2 Repo Bp2 Repo B● Bundle B1 (1.3.0)● Bundle B3 (1.0.0)● Feature F1 (1.3.0)

Local Filesystem● Bundle B3 (1.0.0)● Bundle B4 (5.1.201)

Specify available dependencies in PDE Workspace or Maven Reactor.

Local Filesystem● Feature F1 (1.2.0)● Feature F3 (1.0.0)● Feature F4 (5.1.201)

Local Filesystem● RCP app (“installation”)

● plugins/*

My dependencies set:a .target file

Edit Target Platforms

From Preferences

Edit Target Platforms

With Target Editor

Edit Target Platforms as XML

Include Sources in IDE

But not in Tycho ;)

Planner vs Slicer

Planner tries to get dependencies – and fails when it can't. [~p2 director]Slicer just takes what you want it to take. [~p2 mirror]

Use TP in IDE

OR

Use TP in a Maven build

Separate Tools and Dependencies

PDE

EGit

MylynJBoss Tools 4.0

Eclipse Core 4.2

GMF Tooling

IDE

Bundle B

Feature F

Workspace

JBoss Tools 3.3 repo

Eclipse Indigo repo● Eclipse Core 3.7

EGit repo

Managed TP

Target for compatibility: Example

● JBoss Tools– 1 target for “minimal dependencies” ensures we can

build and run against our minimal requirements

– 1 target for “recommended dependencies” ensures we can build and run against latest versions of deps

● JBoss Developer Studio (install into Eclipse)– 1 target for “minimal”

– 1 target for “recommended”

● JBoss Developer Studio (RCP)– Uses “recommended” for product build

Same one

Develop for an “old” product

PDE

EGit

MylynJBoss Tools 4.0

Eclipse Core 4.2

GMF Tooling

IDE

Managed TP

Bundle A(1.1.0)

Workspace

Without loading all code as projects in your workspace

Bundle C

Older RCP app● Bundle A (1.0.0)● Bundle B● Feature F

IDE only!Does not work with Tycho

Share TP: on SCM

Share TP: “mvn deploy” it

Performances: aggregate

repoA repoB

repoC

repoDrepoE

aggregatedmultiple

Aggregated repo

● Create a new site + a new .target file

● 2 Maven Mojos available– “Flatten” platform (multiple to aggregated)

org.jboss.tools.tycho-plugins:repository-utils:0.0.1-SNAPSHOT:flattern-target

– TP to p2 repoorg.jboss.tools.tycho-plugins:repository-utils:0.0.1-SNAPSHOT:mirror-target-to-repo

Performances: mirrors

remote piiiiiiiiiiiiiiiiiiiiiiiiiiiiiiing Remote repo

remote

+

Mirror defintionIn settings.xml

Local mirror repoping

http://wiki.eclipse.org/Tycho/Target_Platform/Authentication_and_Mirrors#Mirrors

Missing concept: project-specific TP

● PDE only allows 1 TP for the whole workspace– Finer grain would be convenient

– https://bugs.eclipse.org/bugs/show_bug.cgi?id=159072

● Tycho already supports “project-specific” TP.– Could PDE rely on m2e and Tycho to use TP specified in

project pom?

Missing concept: “compound” TP

Compose, use multiple or reference target-platforms– 1 .target for general deps (Eclipse.org, GWT...)

– Each project adds its specific extra deps

– Not supported in PDE nor Tycho● https://bugs.eclipse.org/bugs/show_bug.cgi?id=392652

● https://bugs.eclipse.org/bugs/show_bug.cgi?id=380120

– Maven plugin to merge targets● https://github.com/jbosstools/jbosstools-maven-plugins

Related (?) topics

● Most p2 repo are not sustainable– https://bugs.eclipse.org/bugs/show_bug.cgi?id=331385

– Mirror and manage them locally

● Still no link between Eclipse/p2/Tycho and SpringSource EBR– Would be useful to allow EBR bundles in a TP

– https://issuetracker.springsource.com/browse/EBR-868

Questions?Discussions?

Debates?

Mickael Istria @mickaelistriaEclipseCon Europe 2012Licensed under CC-BY 3.0