1 This folder mirrors a small subset of artifacts from Maven Central [1]. 2 3 In order to create this mirror, we do the following steps: 4 5 1. Create a settings.xml [2] file that specifies the location for the 6 repository. 7 2. Run maven to build the IDE. This process will use Tycho and download 8 and cache all the dependencies in the specified repository. 9 3. Remove the folder p2 inside the repository, which contains artifacts 10 generated during the build in step 2. We only need cached artifacts. 11 4. Update settings.xml to specify that it should run in offline mode, 12 and make sure that the repository has all the necessary contents. 13 14 Step 1: Create a settings.xml 15 16 <?xml version="1.0" encoding="UTF-8"?> 17 <settings xmlns="http://maven.apache.org/SETTINGS/1.0.0" 18 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 19 xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 20 http://maven.apache.org/xsd/settings-1.0.0.xsd"> 21 <localRepository>/path/to/tycho/tycho-dependencies-m2repo</localRepository> 22 <offline>false</offline> 23 </settings> 24 25 Step 2: Run maven using the above settings.xml 26 27 $ cd /path/to/folder/with/pom.xml 28 $ mvn -s /path/to/above/settings.xml package 29 30 This should download and cache all the necessary dependencies in the repository 31 specified in the settings.xml. 32 33 Step 3: Remove unnecessary files from the repository. It turns out that Tycho 34 also populates a whole bunch of eclipse plugins into the p2 folder inside the 35 repository. These don't need to be checked in, so they can be removed. 36 37 Step 4: Validate that the repository contains everything necessary by changing 38 the offline attribute to true, and then rebuild. 39 40 If everything goes well, then the repository can be checked in. 41 42 TODO 43 44 This method could possibly be automated using the Maven Dependency plugin [3]. 45 The "copy-dependencies" task from that plugin allows you to recursively copy 46 all the dependencies of a particular POM. Here is an example command to download 47 all the dependencies for com.android.tools:sdklib:22.7.2 48 49 $ mvn org.apache.maven.plugins:maven-dependency-plugin:2.8:copy-dependencies \ 50 -f ~/.m2/repository/com/android/tools/sdklib/22.7.2/sdklib-22.7.2.pom \ 51 -DoutputDirectory=`pwd`/target \ 52 -Dmdep.copyPom=true \ 53 -Dmdep.useRepositoryLayout=true 54 55 Unfortunately, this doesn't seem to work for the Tycho plugin since it seems 56 like a more complicated multi module setup. The POM for the Tycho plugin specifies 57 sub modules which the dependency plugin doesn't seem to be able to cope with. 58 59 [1] http://search.maven.org/ 60 [2] https://maven.apache.org/settings.html 61 [3] http://maven.apache.org/plugins/maven-dependency-plugin/ 62
