Create script that creates a Gerrit verification job settings.xml

When running a Gerrit build verification job, it is the goal to build
only those packages that are affected by a particular change. The shell
script createSettings.sh builds a list with the affected packages based
on the last HEAD commit in the Git repository and creates a special
settings.xml that activates only those packages.

- Changes in packages/ directory will trigger a rebuild of the package 
  with a change.
- Changes in 'packages/*common*' lead to a full rebuild.
- Changes in other areas than in the packages/ directory lead to a full 
  rebuild.

Change-Id: Ia4670058ad5025c34e053521d5db324f7340109e
Signed-off-by: Markus Knauer <mknauer@eclipsesource.com>

1 files changed, 112 insertions, 0 deletions

diff --git a/releng/org.eclipse.epp.config/tools/createSettings.sh b/releng/org.eclipse.epp.config/tools/createSettings.sh
new file mode 100755
index 00000000..e5e54e14
--- /dev/null
+++ b/releng/org.eclipse.epp.config/tools/createSettings.sh
@@ -0,0 +1,112 @@
+#!/bin/bash
+#
+#  Copyright (c) 2014 Innoopract Informationssysteme GmbH and others.
+#  All rights reserved. This program and the accompanying materials
+#  are made available under the terms of the Eclipse Public License v1.0
+#  which accompanies this distribution, and is available at
+#  http://www.eclipse.org/legal/epl-v10.html
+# 
+#  Contributors:
+#     Innoopract Informationssysteme GmbH - initial API and implementation
+#     EclipseSource - ongoing development
+###############################################################################
+
+###############################################################################
+# The purpose of this little shell script is to generate a settings.xml
+# for Maven that contains a list of packages (as activated profiles) based
+# on the last commit to Git. The idea is that this helps to reduce the
+# number of CPU cycles that are required in a Gerrit verification build job
+# by building only the relevant packages. 
+# (Relevant == the packages that are potentially affected by this change)
+###############################################################################
+
+WORKSPACE=${WORKSPACE:-"${PWD}"}
+GIT_REPOSITORY=${GIT_REPOSITORY:-"org.eclipse.epp.packages"}
+SETTINGS_FILE=${SETTINGS_FILE:-"${WORKSPACE}/settings.xml"}
+IGNORED_PACKAGES=${IGNORED_PACKAGES:-""}
+FULL_BUILD=${FULL_BUILD:-"false"}
+
+echo "Creating ${SETTINGS_FILE}"
+echo "Ignoring package(s): ${IGNORED_PACKAGES}"
+
+### add initial content (proxy definition) from $HOME/.m2/settings.xml
+echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" >$SETTINGS_FILE
+echo "<settings xmlns=\"http://maven.apache.org/SETTINGS/1.0.0\"" >>$SETTINGS_FILE
+echo "          xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"" >>$SETTINGS_FILE
+echo "          xsi:schemaLocation=\"http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd\">" >>$SETTINGS_FILE
+echo "" >>$SETTINGS_FILE
+echo "  <proxies>" >>$SETTINGS_FILE
+echo "    <proxy>" >>$SETTINGS_FILE
+echo "      <id>httpproxy</id>" >>$SETTINGS_FILE
+echo "      <active>true</active>" >>$SETTINGS_FILE
+echo "      <protocol>http</protocol>" >>$SETTINGS_FILE
+echo "      <host>proxy.eclipse.org</host>" >>$SETTINGS_FILE
+echo "      <port>9898</port>" >>$SETTINGS_FILE
+echo "      <nonProxyHosts>localhost|hudson.eclipse.org|127.0.0.1|172.30.206.*</nonProxyHosts>" >>$SETTINGS_FILE
+echo "    </proxy>" >>$SETTINGS_FILE
+echo "    <proxy>" >>$SETTINGS_FILE
+echo "      <id>httpsproxy</id>" >>$SETTINGS_FILE
+echo "      <active>true</active>" >>$SETTINGS_FILE
+echo "      <protocol>https</protocol>" >>$SETTINGS_FILE
+echo "      <host>proxy.eclipse.org</host>" >>$SETTINGS_FILE
+echo "      <port>9898</port>" >>$SETTINGS_FILE
+echo "      <nonProxyHosts>localhost|hudson.eclipse.org|127.0.0.1|172.30.206.*</nonProxyHosts>" >>$SETTINGS_FILE
+echo "    </proxy>" >>$SETTINGS_FILE
+echo "  </proxies>" >>$SETTINGS_FILE
+echo "  <activeProfiles>" >>$SETTINGS_FILE
+
+### use the HEAD commit to find out which package directories contain a change
+PACKAGES="${IGNORED_PACKAGES}"
+cd ${WORKSPACE}/${GIT_REPOSITORY}
+for II in `git diff-tree --name-only --no-commit-id -r HEAD | cut -d "/" -f 2 | cut -d "." -f 5 | sort | uniq`; do
+  if [[ "common" =~ ${II} ]]
+  then
+    echo "${II} found; will trigger a full package build."
+    FULL_BUILD="true"
+    continue
+  fi
+  if [[ ${IGNORED_PACKAGES} =~ ${II} ]]
+  then
+    echo "${II} contains changes, but is ignored or a duplicate."
+    continue
+  fi
+  PACKAGE="epp.package.${II}"
+  echo "Adding package $PACKAGE"
+  echo "    <activeProfile>${PACKAGE}</activeProfile>" >>$SETTINGS_FILE
+  PACKAGES="${PACKAGES} ${PACKAGE}"
+done
+cd ${WORKSPACE}
+
+### if there are changes in other areas of the Git repo then build everything
+cd ${WORKSPACE}/${GIT_REPOSITORY}
+OTHERCHANGES="xxx`git diff-tree --name-only --no-commit-id -r HEAD | grep -v "^packages"`xxx"
+if [ "${OTHERCHANGES}" != "xxxxxx" ] || [ "${FULL_BUILD}" == "true" ]
+then
+  echo "Full build required. Adding all packages"
+  ALLPACKAGES=`ls packages | cut -d "." -f 5 | sort | uniq`
+  for II in ${ALLPACKAGES}; do
+    if [[ "common" =~ ${II} ]]
+    then
+      continue
+    fi
+    if [[ ${PACKAGES} =~ ${II} ]]
+    then
+      echo "${II} should be added for all packages, but it is ignored or a duplicate."
+      continue
+    else
+      PACKAGE="epp.package.${II}"
+      echo "Adding package $PACKAGE"
+      echo "    <activeProfile>${PACKAGE}</activeProfile>" >>$SETTINGS_FILE
+      PACKAGES="${PACKAGES}"
+    fi
+  done
+fi
+cd ${WORKSPACE}
+
+### close the settings.xml file
+echo "  </activeProfiles>" >>$SETTINGS_FILE
+echo "" >>$SETTINGS_FILE
+echo "</settings>" >>$SETTINGS_FILE
+
+echo "Written new $SETTINGS_FILE"
+