Automated the release process

This PR automates the release process, by setting the version to -SNAPSHOT
when on a regular build, but to a proper fixed version when building for a tag.

This effectively means that releasing is just a matter of tagging the code at
a given point.

It's still needed to manually bump the version after a tag.

At this stage, closing/releasing of the Nexus repository is still manual and
will be automated if the main release procedure proves stable enough.

.travis.yml

@@ -1,20 +1,15 @@
 sudo: required
-
 language: java
-
 dist: trusty
-
 matrix:
   include:
   - env:
     - TESTS=true
     - COVERAGE=true
   - env:
     - CROSSDOCK=true
-
 services:
 - docker
-
 env:
   global:
   - DOCKER_VERSION=1.11.1-0~trusty
@@ -28,26 +23,32 @@ env:
   - secure: q19fJLh2aO583rOALLKor4FeQr5u3EWKtUNhOyrUR9k7FLVk/9cLIrLr77DWdYxn0DE123DeHHm+GB7vEL85DmhJXUy3Bqpkjqr/eOZwtzGuCeDY9q7pO3eJJ8V3Fhw0p9rvGq1yg/nEO6S9whE+IUFxUanSIsjltM93KEfeaOGEvi5vkfKoD1etgGh8tx3d69Q17SyfHl+xRMW4KOVe3vdjUUnFPINhqmjKaYRmbsZ3yx7cuX+i6qbpW3Biypy/zjeu/35CfjQIiB8rgo8G6qtbGj9gfMzt3xmDL2LEOJtIx4nDJ3wPMVsGUGbu8LhNzX71EddbnqdWwjLnyoYAEYynu13q8rHljA+NlT8mPBP4wX00TTtJoWmwCmMnWgRcFPMS50cVBDwLLANZcVPU6iNY/+0AE4ANlzWHDLD/0pTqvYB5Z2UIVbXPuvkys7xBL5pKFnqTXVlWQuTRkSO8PXnSo24QP04AcjlkHnqNPesjkztFh4DSOfyL/6BiLebKDo6C+KNcN6Ep9SYpVfkwYDLV2qtfbiLxu4wjAgQjxPk701VGMfywmMvHaqa7UQpXQfEvHM/kTYJGknqf80WvXo/ilnvb9esANEP6cJZ3Z9h7Sq9P/ytec5NqPRaKVaMmN5bJXNY30g7MLkyD1fAMKIkaUfFdKNFzZVAAmsC7fho=
   # DOCKER_PASSWORD=<docker password>
   - secure: 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
-
+  # SIGNING_KEY_ID
+  - secure: lVS7/tiVUjNAhjIS5kSx0vIGJP6JLi6PGHBgHyPvgj4/3SoxJeJ07HKyMmP6oLjvUzDOQZ7fn4VuEb3NOg4rJI5vbKSVw0w2qXTDaiJUSEtLRWgUV1II7hhPXf18ikXcgiCDWv8IMlEUq/7VLyiqyLfgxe457GfUBW+HFjg/BkCHzIveilxU9IAE2vGVB46g4tBl4wSXkY9mCpZVsQHcNdJ2UIzXizWMpMiC138MW+bm3jSug2OnWTL4Bm8alv1r3drRQiIyd3VbkUMKEFWV4NpMZvx8cI4Z54ePi9wmqGn67dcFjjfWroJ9NOK58SQcWMJc5NxI6Y4EdYU3DUZ/vfgSaDgFGbfL1+tIvgllqLuwfnTXM5wx1UDLHx9KbzveHG+JIvfLbIHsKIzAVHoyFo+ZQ3suEu3CL/75mjijnoHJ/sQhqeLeDIFwan+AdKlfofJ/Ztq7rqPysGu4SzYxs3m0pKEPuGnjXVDLAa4HUFz5inI+4Q34Mdr5Plm9E0Ka71PBMxsW92IbVTYCKASLvyGbHPpAFUSBeRtT/wYaKlOxvFJ7fARD//wRAlelD/41IzarwaXtbtVS8TvJ9vQWhbHDx/ssPTify+5zMzJ9QboiUjpcOlN1bhRJ1oi6OrgacH4do+yhWJyar2f+djomWDJ6uvsKqep3T+CjB945EFA=
+  # SIGNING_KEY_PASSPHRASE
+  - secure: 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
 before_cache:
 - rm -f $HOME/.gradle/caches/modules-2/modules-2.lock
-
 cache:
   directories:
-  - $HOME/.gradle/caches/
-  - $HOME/.gradle/wrapper/
-
+  - "$HOME/.gradle/caches/"
+  - "$HOME/.gradle/wrapper/"
 before_install:
+- if [ "$TRAVIS_SECURE_ENV_VARS" == true ]; then openssl aes-256-cbc -K $encrypted_677f232983c0_key -iv $encrypted_677f232983c0_iv -in travis/signing-key.asc.enc -out travis/signing-key.asc -d ; fi
+- if [ "$TRAVIS_SECURE_ENV_VARS" == true ]; then gpg --no-tty --batch --allow-secret-key-import --import travis/signing-key.asc ; fi
+- rm -rf "$HOME/.gradle/gradle.properties"
+- echo signing.keyId="${SIGNING_KEY_ID}" > "$HOME/.gradle/gradle.properties"
+- echo signing.password="${SIGNING_KEY_PASSPHRASE}" >> "$HOME/.gradle/gradle.properties"
+- echo ossrhUsername="${SONATYPE_USERNAME}" >> "$HOME/.gradle/gradle.properties"
+- echo ossrhPassword="${SONATYPE_PASSWORD}" >> "$HOME/.gradle/gradle.properties"
+- echo signing.secretKeyRingFile="${HOME}/.gnupg/secring.gpg" >> "$HOME/.gradle/gradle.properties"
 - if [ "$CROSSDOCK" == true ]; then bash ./travis/install-crossdock-deps.sh ; fi
 - sudo rm -rf /usr/local/bin/thrift
 - sudo cp travis/docker-thrift/thrift /usr/local/bin/
-
-
 script:
 - if [ "$TESTS" == true ]; then make test ; else echo 'skipping tests'; fi
 - if [ "$COVERAGE" == true ]; then ./gradlew codeCoverageReport ; else echo 'skipping coverage'; fi
 - if [ "$CROSSDOCK" == true ]; then bash ./travis/build-crossdock.sh ; else echo 'skipping crossdock'; fi
-
 after_success:
 - if [ "$COVERAGE" == true ]; then bash <(curl -s https://codecov.io/bash) ; fi
-- if [ "$CROSSDOCK" == true ]; then ./gradlew uploadArchives -PossrhUsername="${SONATYPE_USERNAME}" -PossrhPassword="${SONATYPE_PASSWORD}" ; fi
+- if [ "$CROSSDOCK" == true ]; then ./gradlew upload -PossrhUsername="${SONATYPE_USERNAME}" -PossrhPassword="${SONATYPE_PASSWORD}" ; fi

build.gradle

@@ -31,7 +31,7 @@ allprojects {
     apply plugin: 'jacoco'
 
     group = 'com.uber.jaeger'
-    version = '0.20.0-SNAPSHOT'
+    version = System.env.TRAVIS_TAG ? System.env.TRAVIS_TAG : '0.20.0-SNAPSHOT'
 
     repositories {
         mavenCentral()
@@ -142,6 +142,12 @@ task codeCoverageReport(type: JacocoReport, group: 'Coverage reports') {
     }
 }
 
+task printVersion {
+    doLast {
+        println project.version
+    }
+}
+
 configure(subprojects.findAll {it.name != 'jaeger-thrift'}) {
    apply plugin: 'net.ltgt.errorprone'
    dependencies {