Maven Tycho Plugin Tests and slf4j

If your eclipse-test-plugin tests break in a maven Tycho build, you have to check the target/work/configuration folder for the log files.

Mybe you will find something like this:

!ENTRY de.dim.search.index.tests 2 0 2016-11-03 10:37:31.137
!MESSAGE Could not resolve module: de.dim.search.index.tests [13]
  Unresolved requirement: Require-Bundle: de.dim.search.index.core
    -> Bundle-SymbolicName: de.dim.search.index.core; bundle-version="1.2.0.201611030937"
       de.dim.search.index.core [9]
         Unresolved requirement: Import-Package: org.slf4j
           -> Export-Package: org.slf4j; bundle-symbolic-name="org.slf4j.api"; bundle-version="1.7.5.v20150828-1500"; version="1.7.5"; uses:="org.slf4j.spi"
              org.slf4j.api [11]
                Unresolved requirement: Import-Package: org.slf4j.impl; version="[1.6.0,1.7.6)"; resolution:="optional"
                Unresolved requirement: Require-Capability: org.slf4j.impl; filter:="(&(version>=1.6.0)(!(version>=1.7.6)))"
  Unresolved requirement: Fragment-Host: de.dim.search.index.core; bundle-version="1.2.0"
    -> Bundle-SymbolicName: de.dim.search.index.core; bundle-version="1.2.0.201611030937"


!ENTRY de.dim.search.index.core 2 0 2016-11-03 10:37:31.138
!MESSAGE Could not resolve module: de.dim.search.index.core [9]
  Unresolved requirement: Import-Package: org.slf4j
    -> Export-Package: org.slf4j; bundle-symbolic-name="org.slf4j.api"; bundle-version="1.7.5.v20150828-1500"; version="1.7.5"; uses:="org.slf4j.spi"
       org.slf4j.api [11]
         Unresolved requirement: Import-Package: org.slf4j.impl; version="[1.6.0,1.7.6)"; resolution:="optional"
         Unresolved requirement: Require-Capability: org.slf4j.impl; filter:="(&(version>=1.6.0)(!(version>=1.7.6)))"


!ENTRY org.slf4j.api 2 0 2016-11-03 10:37:31.138
!MESSAGE Could not resolve module: org.slf4j.api [11]
  Unresolved requirement: Import-Package: org.slf4j.impl; version="[1.6.0,1.7.6)"; resolution:="optional"
  Unresolved requirement: Require-Capability: org.slf4j.impl; filter:="(&(version>=1.6.0)(!(version>=1.7.6)))"

The resolution is to add the fragment ch.qos.logback.slf4j to the manifest and mark it as optional debendency.

Ensure that slf4j and logback is in you target platform. You will find it int the Eclipse Orbit.

Eclipse RCP product icons and Maven Tycho

Last time I encountered some problems with application launcher icons when building my RCP application with Maven Tycho.

I got a FileNotFound Exception during product build for the Linux XPM-icon file. For a windows build I got a build-warning: “Error – 7 icon not replaced in …”.

Stackoverflow led me to a post that says something about the icons sizes for Windows launchers [1]. According to this, the following sizes are expected:

For Eclipse 3.7.2:

  • 48×48 8 bit (256 colors)
  • 32×32 8 bit
  • 24×24 8 bit
  • 16×16 8 bit
  • 48×48 32 bit (RGB + Alpha)
  • 32×32 32 bit
  • 16×16 32 bit

For Eclipse 4.2:

  • 256×256, 32 bit (RGB / Alpha Channel)
  • 48×48, 32 bit (RGB / Alpha Channel)
  • 32×32, 32 bit (RGB / Alpha Channel)
  • 16×16, 32 bit (RGB / Alpha Channel)
  • 48×48, 8 bit (256 colors)
  • 32×32, 8 bit (256 colors)
  • 16×16, 8 bit (256 colors)

I use The Gimp to create the ico files. But it is also possible to do an automatic conversion under Linux using ImageMagick and icotools. For this there is a tutorial here [2].

Furthermore you have to take care about the launcher file path in the product definition file. It mustn’t start with a slash, otherwise you will get a FileNotFound Exception during product build for the Linux XPM-icon file.

[1] http://stackoverflow.com/questions/10999323/error-in-tycho-while-replacing-the-product-ico-files

[2] http://tomsondev.bestsolution.at/2007/06/26/branding-for-windows-how-to-create-ico-files-automatically/