fixing build / release process (#87)

Author: Magesh Chandramouli

.travis/deploy.sh

@@ -1,32 +1,41 @@
 #!/bin/bash
 cd `dirname $0`/..
 
-if [ "${TRAVIS_BRANCH}" == 'master' -a "${TRAVIS_PULL_REQUEST}" == 'false' ] || [ -n "${TRAVIS_TAG}" ]; then
-  if [[ -z "${SONATYPE_USERNAME}" || -z "${SONATYPE_PASSWORD}" ]]; then
+BRANCH=${TRAVIS_BRANCH}
+PULL_REQUEST=${TRAVIS_PULL_REQUEST}
+USERNAME=${SONATYPE_USERNAME}
+PASSWORD=${SONATYPE_PASSWORD}
+SHA=${TRAVIS_COMMIT}
+
+# Only if this is a master branch and it is not a PR - meaning, this commit
+# is from master branch most merge
+if [[ "${BRANCH}" == 'master' && "${PULL_REQUEST}" == 'false' ]]; then
+  if [[ -z "${USERNAME}" || -z "${PASSWORD}" ]]; then
     echo "ERROR! Please set SONATYPE_USERNAME and SONATYPE_PASSWORD environment variable"
     exit 1
   fi
 
-  TAG_NAME=`git describe ${TRAVIS_COMMIT} --tags`
-  echo "Tag associated with the current commit ${TRAVIS_COMMIT} is ${TAG_NAME}"
-  
-  if [ ! -z "${TRAVIS_TAG}" ]; then
-    echo "travis tag is set -> updating pom.xml <version> attribute to ${TRAVIS_TAG}"
-    ./mvnw --batch-mode --settings .travis/settings.xml -DskipTests=true -DreleaseVersion=${TRAVIS_TAG} release:clean release:prepare release:perform
+  # if the current commit has a tag and if the tag matches the semantic versioning pattern `x.y.z`
+  # then release it
+  TAG_NAME=`git describe ${SHA} --tags`
+  echo "Tag associated with the current commit ${SHA} is ${TAG_NAME}"
+
+  if [[ ! -z "${TAG_NAME}" &&  ${TAG_NAME} =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
+    echo "travis tag is set -> updating pom.xml <version> attribute to ${TAG_NAME}"
+    ./mvnw --batch-mode --settings .travis/settings.xml -DskipTests=true -DreleaseVersion=${TAG_NAME} release:clean release:prepare release:perform
     SUCCESS=$?
   else
     echo "no travis tag is set, hence keeping the snapshot version in pom.xml"
     ./mvnw --batch-mode --settings .travis/settings.xml clean deploy -DskipTests=true -B -U
     SUCCESS=$?
   fi
 
-  if [ ${SUCCESS} -eq 0 ]; then
+  if [[ ${SUCCESS} -eq 0 ]]; then
     echo "successfully deployed the jars to nexus"
   fi
 
   exit ${SUCCESS}
 else
-  echo "Skipping artifact deployment for branch ${TRAVIS_BRANCH} with PR=${TRAVIS_PULL_REQUEST} and TAG=${TRAVIS_TAG}"
+  echo "Skipping artifact deployment for branch ${BRANCH}, commit ${SHA} with PR=${PULL_REQUEST}"
+  exit 0
 fi
-
-exit 0