REPO-4735 add release stage (#636)

Added the a Engineering Release stage and Company Release stage to travis.yml and added any required credentials to Travis.
Each release stage is triggered by a specific commit message, as listed in the "stages" section of travis.yml.
Provided a commit message to skip test stages if required, to speed up release process.
Global variables have been added to set the release version, development version and the community release version for the release stages.

scripts/travis/copy_to_release_bucket.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+set -ev
+
+if [ -z ${COMM_RELEASE_VERSION} ] || [ -z ${RELEASE_VERSION} ];
+then
+  echo "Please provide a COMM_RELEASE_VERSION and RELEASE_VERSION in the format <acs-version>-<additional-info> (6.3.0-EA or 6.3.0-SNAPSHOT)"
+  exit -1
+fi
+
+build_number=$1
+branch_name=$2
+build_stage=release
+SOURCE=s3://alfresco-artefacts-staging/alfresco-content-services-community/$build_stage/$branch_name/$build_number
+DESTINATION=s3://eu.dl.alfresco.com/release/community/$COMM_RELEASE_VERSION-build-$build_number
+
+aws s3 cp --acl private $SOURCE/alfresco.war $DESTINATION/alfresco.war
+aws s3 cp --acl private $SOURCE/alfresco-content-services-community-distribution-$RELEASE_VERSION.zip $DESTINATION/alfresco-content-services-community-distribution-$RELEASE_VERSION.zip

scripts/travis/maven_release.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+set -e
+
+releaseVersion=$1
+developmentVersion=$2
+scm_path=$(mvn help:evaluate -Dexpression=project.scm.url -q -DforceStdout)
+
+# Use full history for release
+git checkout -B "${TRAVIS_BRANCH}"
+# Add email to link commits to user
+git config user.email "${GIT_EMAIL}"
+
+if [ -z ${releaseVersion} ] || [ -z ${developmentVersion} ]; 
+    then echo "Please provide a Release and Development verison in the format <acs-version>-<additional-info> (6.3.0-EA or 6.3.0-SNAPSHOT)"
+         exit -1
+else   
+    mvn --batch-mode \
+    -Dusername="${GIT_USERNAME}" \
+    -Dpassword="${GIT_PASSWORD}" \
+    -DreleaseVersion=${releaseVersion} \
+    -DdevelopmentVersion=${developmentVersion} \
+    -Dbuild-number=${TRAVIS_BUILD_NUMBER} \
+    -Dbuild-name="${TRAVIS_BUILD_STAGE_NAME}" \
+    -Dscm-path=${scm_path} \
+    -DscmCommentPrefix="[maven-release-plugin][skip ci]" \
+    -DskipTests \
+    "-Darguments=-DskipTests -Dbuild-number=${TRAVIS_BUILD_NUMBER} '-Dbuild-name=${TRAVIS_BUILD_STAGE_NAME}' -Dscm-path=${scm_path} " \
+    release:clean release:prepare release:perform \
+    -Prelease
+fi

scripts/travis/verify_release_tag.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+set -e
+
+if [ -v ${RELEASE_VERSION} ]||[ -z ${RELEASE_VERSION} ]; then
+    echo "Please provide a RELEASE_VERSION in the format <acs-version>-<additional-info> (6.3.0-EA or 6.3.0-SNAPSHOT)"
+    exit -1
+fi
+# get the image name from the pom file
+alfresco_docker_image=$(mvn help:evaluate -f ./docker-alfresco/pom.xml -Dexpression=image.name -q -DforceStdout)
+docker_image_full_name="$alfresco_docker_image:$RELEASE_VERSION"
+
+function docker_image_exists() {
+  local image_full_name="$1"; shift
+    local wait_time="${1:-5}"
+    local search_term='Pulling|is up to date|not found'
+    echo "Looking to see if $image_full_name already exists..."
+    local result="$((timeout --preserve-status "$wait_time" docker 2>&1 pull "$image_full_name" &) | grep -v 'Pulling repository' | egrep -o "$search_term")"
+    test "$result" || { echo "Timed out too soon. Try using a wait_time greater than $wait_time..."; return 1 ;}
+    if echo $result | grep -vq 'not found'; then
+        true
+    else 
+        false
+    fi
+}
+
+if docker_image_exists $docker_image_full_name; then
+    echo "Tag $RELEASE_VERSION already pushed, release process will interrupt."
+    exit -1 
+else
+    echo "The $RELEASE_VERSION tag was not found"
+fi