Circle-CI -Only branch

.circleci.settings.xml

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+<settings xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/SETTINGS/1.0.0"
+          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
+    <servers>
+        <server>
+            <id>oss.sonatype</id>
+            <username>${env.OSS_SONATYPE_USERNAME}</username>
+            <password>${env.OSS_SONATYPE_PASSWORD}</password>
+        </server>
+    </servers>
+</settings>

circle.yml

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+dependencies:
+  pre:
+    - mkdir -p ~/.gnupg
+    - cp gpg/pubring.gpg ~/.gnupg/pubring.gpg
+    - openssl aes-256-cbc -d -in gpg/secret -k $SIGN_SECRET >> ~/.gnupg/secring.gpg
+  override:
+    - mvn clean install dependency:resolve-plugins dependency:go-offline
+
+deployment:
+  main:
+    branch: master
+    commands:
+      - mvn -P release -s .circleci.settings.xml -DskipTests deploy -Dgpg.passphrase=$GPG_PASSPHRASE