[#1504] add manual step for testing on Java 5 to release process

Closes #1504

RELEASE-NOTES.md

@@ -40,7 +40,7 @@ Picocli follows [semantic versioning](http://semver.org/).
 * [#1461] BUILD: Allow publishing without signing for non-release versions. Thanks to [Andreas Deininger](https://github.com/deining) for raising this.
 * [#1459] BUILD: The nexus-staging Gradle plugin must be applied to the root project, not to subprojects. Thanks to [Andreas Deininger](https://github.com/deining) for raising this.
 * [#1503] BUILD: Fix failing `System.exit` tests on Java 18.
-* [#1504] BUILD: Run tests on Java 5/6/7 in CI environment.
+* [#1504] BUILD: Run tests on Java 6-7 in CI environment, semi-automate testing on Java 5.
 * [#1495] DEP: Bump validation-api from 2.0.0.Final to 2.0.1.Final
 * [#1496] DEP: Bump biz.aQute.bnd.gradle from 5.1.2 to 6.1.0
 * [#1494] DEP: Bump kotlin-gradle-plugin from 1.5.31 to 1.6.0

gradle/release-tasks.gradle

@@ -118,24 +118,25 @@ Release procedure:
 6. update RELEASE-NOTES.md
 7. ./gradlew bumpReadmeVersion
 7a update README.md (latest version, release notes)
-8. commit -m "Release picocli version ..."
-9. tag v$version
-10 ./gradlew publishReleasePublicationToSonatypeRepository - creates a Sonatype staging repository, and uploads artifacts
-11. Close the Sonatype info/picocli staging repo:
+8. (in new cmd prompt session) cd picocli-legacy-tests ^ set JAVA_HOME=C:\apps\jdk1.5.0_22 ^ gradlew clean build --no-daemon
+9. commit -m "Release picocli version ..."
+10. tag v$version
+11 ./gradlew publishReleasePublicationToSonatypeRepository - creates a Sonatype staging repository, and uploads artifacts
+12. Close the Sonatype info/picocli staging repo:
   a. Manually: Log in to https://oss.sonatype.org/ and in the menu on the left, select Staging repositories.
      Click the close button in the GUI and watch progress in the
   b. Automatically with the codearte.nexus-staging plugin:
      ./gradlew closeAndReleaseRepository
 
-12. edit version numbers: increase minor version and add -SNAPSHOT classifier
-13. ./gradlew bumpVersion
-14. check modified files
-15. commit -m "Prepare for next development cycle"
-16. push (make sure that Push Tags is checked)
+13. edit version numbers: increase minor version and add -SNAPSHOT classifier
+14. ./gradlew bumpVersion
+15. check modified files
+16. commit -m "Prepare for next development cycle"
+17. push (make sure that Push Tags is checked)
 
-17. Log in to GitHub, go to https://github.com/remkop/picocli/releases
-18. Click the new tag, click Edit button, update title and release notes (copy from RELEASE-NOTES.md)
-19. Upload picocli-$version.jar and picocli-all$version.zip to GitHub
+18. Log in to GitHub, go to https://github.com/remkop/picocli/releases
+19. Click the new tag, click Edit button, update title and release notes (copy from RELEASE-NOTES.md)
+20. Upload picocli-$version.jar and picocli-all$version.zip to GitHub
 
 
 (When releasing from branch)