Make get_release_commands.sh spit shell-script.

Use it like this now:

./get_release_commands.sh 1.8 > release.sh
chmod u+x release.sh
./release.sh

.gitignore

@@ -7,3 +7,5 @@ test.log
 .project
 .settings/
 .idea
+pom.xml.versionsBackup
+release.sh

get_release_commands.sh

@@ -23,61 +23,66 @@ incr_last_digit=$((${version_after_dot}+1))
 version_without_last_digit=${version: 0:${version_str_length}}
 new_version="${version_without_last_digit}${incr_last_digit}-SNAPSHOT"
 
+echo "#!/bin/sh"
+
+echo "set -xe"
+
 if [[ "$2z" = "z" ]]; then
-  echo "No new development version given using ${new_version}"
+  echo "# No new development version given using ${new_version}"
 else
   new_version=$2
-  echo "New development version will be ${new_version}"
+  echo "# New development version will be ${new_version}"
 fi
 
-echo "To release zt-zip version ${version} run these commands:"
+
+echo "# To release zt-zip version ${version} run these commands:"
 echo ""
-echo "1) set release version"
+echo "# 1) set release version"
 echo "mvn versions:set -DnewVersion=${version}"
 
 echo ""
-echo "2) commit & tag"
+echo "# 2) commit & tag"
 echo "git add pom.xml; "
 echo "git commit -m \"Prepare release zt-zip-${version}\""
 echo "git tag zt-zip-${version}"
 
 echo ""
-echo "3) build release"
+echo "# 3) build release"
 echo "mvn clean install"
 
 echo ""
-echo "4) generate javadoc archive"
+echo "# 4) generate javadoc archive"
 echo "mvn javadoc:jar"
 
 echo ""
-echo "5) generate sources archive"
+echo "# 5) generate sources archive"
 echo "mvn source:jar"
 
 echo ""
-echo "6) deploy and sign releases archive"
+echo "# 6) deploy and sign releases archive"
 echo "mvn gpg:sign-and-deploy-file -Durl=https://oss.sonatype.org/service/local/staging/deploy/maven2/ -DrepositoryId=sonatype-nexus-staging -DpomFile=pom.xml -Dfile=target/zt-zip-$1.jar"
 
 echo ""
-echo "7) deploy and sign sources archive"
+echo "# 7) deploy and sign sources archive"
 echo "mvn gpg:sign-and-deploy-file -Durl=https://oss.sonatype.org/service/local/staging/deploy/maven2/ -DrepositoryId=sonatype-nexus-staging -DpomFile=pom.xml -Dfile=target/zt-zip-$1-sources.jar -Dclassifier=sources"
 
 echo ""
-echo "8) deploy and sign javadoc archive"
+echo "# 8) deploy and sign javadoc archive"
 echo "mvn gpg:sign-and-deploy-file -Durl=https://oss.sonatype.org/service/local/staging/deploy/maven2/ -DrepositoryId=sonatype-nexus-staging -DpomFile=pom.xml -Dfile=target/zt-zip-$1-javadoc.jar -Dclassifier=javadoc"
 
 echo ""
-echo "9) set new development version"
+echo "# 9) set new development version"
 echo "mvn versions:set -DnewVersion=${new_version}"
 echo "git add pom.xml; "
 echo "git commit -m \"prepare for next development iteration\""
 
 echo ""
-echo "10) push to GitHub"
+echo "# 10) push to GitHub"
 echo "git push"
 echo "git push --tags"
 
 echo ""
-echo "11) clean local repo"
+echo "# 11) clean local repo"
 echo "git clean -f"