.travis.yml: sync Erlang and Elixir versions, require Erlang/OTP 20.3

Author: michaelklishin

.travis.yml

@@ -0,0 +1,57 @@
+# vim:sw=2:et:
+
+dist: xenial
+sudo: false
+language: erlang
+notifications:
+  email:
+    recipients:
+      - alerts@rabbitmq.com
+    on_success: never
+    on_failure: always
+addons:
+  apt:
+    packages:
+      - awscli
+cache:
+  apt: true
+env:
+  global:
+    - secure: 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
+    - secure: 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
+
+otp_release:
+  - "20.3"
+  - "21.2"
+
+before_script:
+  - elixir --version
+  # The checkout made by Travis is a "detached HEAD" and branches
+  # information is missing. Our Erlang.mk's git_rmq fetch method relies
+  # on it, so we need to restore it.
+  #
+  # We simply fetch master and, if it exists, v3.7.x branches. A branch
+  # is created, pointing to the detached HEAD.
+  - |
+    git checkout -B "${TRAVIS_TAG:-${TRAVIS_BRANCH}}"
+    git remote add upstream https://github.com/$TRAVIS_REPO_SLUG.git
+    git fetch upstream v3.7.x:v3.7.x || :
+    git fetch upstream master:master || :
+
+script:
+  - make xref
+  - make tests
+
+after_failure:
+  - |
+    cd "$TRAVIS_BUILD_DIR"
+    if test -d logs && test "$AWS_ACCESS_KEY_ID" && test "$AWS_SECRET_ACCESS_KEY"; then
+      archive_name="$(basename "$TRAVIS_REPO_SLUG")-$TRAVIS_JOB_NUMBER"
+
+      tar -c --transform "s/^logs/${archive_name}/" -f - logs | \
+        xz > "${archive_name}.tar.xz"
+
+      aws s3 cp "${archive_name}.tar.xz" s3://server-release-pipeline/travis-ci-logs/ \
+        --region eu-west-1 \
+        --acl public-read
+    fi