From 13a9ceb0a1b779af6db5f46b7580d0b034289733 Mon Sep 17 00:00:00 2001
From: Ryan Fitzpatrick <rmfitzpatrick@users.noreply.github.com>
Date: Fri, 21 Aug 2020 14:40:55 -0400
Subject: [PATCH] Add CircleCI (#3)

Add an initial CircleCI config and additional make assemble and test targets for its use.
---
 .circleci/config.yml | 53 ++++++++++++++++++++++++++++++++++++++++++++
 Makefile             |  8 +++++++
 README.md            |  1 +
 3 files changed, 62 insertions(+)
 create mode 100644 .circleci/config.yml

diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 00000000..cc527416
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,53 @@
+# Java Gradle CircleCI 2.0 configuration file
+#
+# Check https://circleci.com/docs/2.0/language-java/ for more details
+#
+version: 2
+jobs:
+  build:
+    docker:
+      - image: circleci/openjdk:8-jdk
+
+      # Specify service dependencies here if necessary
+      # CircleCI maintains a library of pre-built images
+      # documented at https://circleci.com/docs/2.0/circleci-images/
+      # - image: circleci/postgres:9.4
+
+    working_directory: ~/repo
+
+    environment:
+      # Customize the JVM maximum heap limit
+      JVM_OPTS: -Xmx1g
+      GRADLE_OPTS: "-Dorg.gradle.workers.max=4"
+      TERM: dumb
+
+    steps:
+      - checkout
+
+      # Download and cache dependencies
+      - restore_cache:
+          keys:
+            - gradle-{{ checksum "build.gradle" }}
+            # fallback to using the latest cache if no exact match is found
+            - gradle-
+
+      - run:
+          name: Assemble
+          command: make assemble
+
+      - save_cache:
+          paths:
+            - ~/.gradle
+          key: gradle-{{ checksum "build.gradle" }}
+
+      - run:
+          name: Tests
+          command: make test
+
+      - run:
+          name: Lint check
+          command: make check
+
+      - run:
+          name: Build validation
+          command: make build
diff --git a/Makefile b/Makefile
index 5276da2b..a6ea71f7 100644
--- a/Makefile
+++ b/Makefile
@@ -15,3 +15,11 @@ check:
 .PHONY: clean
 clean:
 	./gradlew clean
+
+.PHONY: assemble
+assemble:
+	./gradlew assemble
+
+.PHONY: test
+test:
+	./gradlew test
diff --git a/README.md b/README.md
index 1b1a12cd..37dbfced 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,5 @@
 # OpenTelemetry Java Contrib
+[![Build status](https://img.shields.io/circleci/build/github/open-telemetry/opentelemetry-java-contrib?style=for-the-badge)](https://app.circleci.com/pipelines/github/open-telemetry/opentelemetry-java-contrib?branch=master)
 
 This project is intended to provide helpful libraries and standalone OpenTelemetry-based utilities that don't fit
 the express scope of the [OpenTelemetry Java](https://github.com/open-telemetry/opentelemetry-java) or