From 0ee28f822b98b8c1549902e180d97c101bdba2be Mon Sep 17 00:00:00 2001
From: Carlos Roman <carlos.roman@datadoghq.com>
Date: Thu, 28 Dec 2023 12:00:11 +0000
Subject: [PATCH] Adding Maven cache to CircleCI config

---
 .circleci/config.yml | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/.circleci/config.yml b/.circleci/config.yml
index 1dac557df..4495d2ed9 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -2,12 +2,37 @@ version: 2
 lint_steps: &lint_steps
   steps:
     - checkout
+    - restore_cache:
+        name: Restore Maven cache
+        keys:
+          # when pom.xml file changes, use increasingly general patterns to restore cache
+          # Linting has own cache as deps not downloaded during test phases. If doesn't exist will
+          # fall back on any available cache.
+          - &maven-cache maven-cache-{{ .Branch }}-{{ checksum "pom.xml" }}-lint
+          - maven-cache-{{ .Branch }}-
+          - maven-cache-
     - run: ./mvnw verify -B -Dhttps.protocols=TLSv1.2 -DskipTests
+    - save_cache:
+        key: *maven-cache
+        paths:
+          - ~/.m2
 build_steps: &build_steps
   steps:
     - checkout
+    - restore_cache:
+        name: Restore Maven cache
+        keys:
+          # when pom.xml file changes, use increasingly general patterns to restore cache
+          - &maven-cache maven-cache-{{ .Branch }}-{{ checksum "pom.xml" }}
+          - maven-cache-{{ .Branch }}-
+          - maven-cache-
     - setup_remote_docker
     - run: ./mvnw test -B -Dhttps.protocols=TLSv1.2 -Dcheckstyle.skip=true -Dtests.log_level=info -Djdk.attach.allowAttachSelf=true
+    - save_cache:
+        when: always
+        key: *maven-cache
+        paths:
+          - ~/.m2
     - run:
         when: on_fail
         command: for log in target/surefire-reports/*.txt; do  echo "$log ========================" ; cat $log ; done