split main README

maven-central.md

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+# Maven-Central Reminders
+
+Cheat-sheets for me when setting up a new development environment
+
+## GPG Sign Key
+``` bash
+gpg --list-keys
+# if key absent, then generate one with
+gpg --gen-key
+# publish public key to one of supported servers 
+export GPG_PUB_KEY=(replace with "pub" key)
+gpg --keyserver http://pgp.mit.edu:11371/ --send-keys $GPG_PUB_KEY
+gpg --keyserver http://keyserver.ubuntu.com:11371/ --send-keys $GPG_PUB_KEY
+gpg --keyserver https://keys.openpgp.org/ --send-keys $GPG_PUB_KEY
+```
+
+
+## ~/.m2/settings.xml
+``` xml
+<?xml version="1.0" encoding="UTF-8"?>
+<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
+          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
+  <servers>
+    <server>
+      <!-- OSSRH Jira account -->
+      <id>ossrh</id>
+      <username>ch4mpy</username>
+      <password>${env.OSSRH_PWD}</password><!-- password retrieved from environment variable -->
+    </server>
+  </servers>
+
+  <profiles>
+    <profile>
+      <id>ossrh</id>
+      <activation>
+        <activeByDefault>true</activeByDefault>
+      </activation>
+      <properties>
+        <gpg.executable>gpg</gpg.executable>
+        <gpg.passphrase>${env.GPG_PWD}</gpg.passphrase><!-- password retrieved from environment variable -->
+      </properties>
+    </profile>
+  </profiles>
+</settings>
+```
+
+Add-opens for releasing with JDK 17:
+`export JDK_JAVA_OPTIONS='--add-opens java.base/java.util=ALL-UNNAMED --add-opens java.base/java.lang.reflect=ALL-UNNAMED --add-opens java.base/java.text=ALL-UNNAMED --add-opens java.desktop/java.awt.font=ALL-UNNAMED'`