Release Build

Building ICU4J Release Files
Prerequisites
Building Release Files for Final Release (GA)

Building ICU4J Release Files

Note: This instruction is reviewed for ICU4J 69.1. Some description may not apply to previous ICU releases. ICU4J library (as of ICU 69) supports JRE 7 or later Java runtime environment. To avoid the Java’s system library class’s backward compatibility problem, ICU4J binary files must be compiled with Java system libraries from JRE 7.

Prerequisites

Java SE Development Kit 8 (to run ant, javac, javadoc..)
Java Runtime Environment 7 (used as bootclasspath for cross-compilation)
Apache Ant 1.10.x (the latest available version) [http://ant.apache.org/]
JCite 1.13.0 [https://arrenbrecht.ch/jcite/]

Other Prerequisites only for GA

Maven Ant Tasks 2.1.3 (GA only) [http://maven.apache.org/ant-tasks] (Note: This is component is no longer maintained, and ICU project should update the process in near future)
gpg (GNU Privacy Guard)
- ICU Project PGP key (icuintl@us.ibm.com - published to MIT key server)
Sonatype Nexus Repository Manager account for managing artifacts com.ibm.icu.* on OSSRH (Reference: OSSRH Guide)

Note: Contact Yoshito for the PGP key and Sonatype account.

Configuration

Set environment variable JAVA_HOME to point to the JDK directory.
Set environment variable JCITE_DIR to specify JCite binary location (see Building ICU4J API Reference Document with JCite)
See build.properties to check version strings are properly set.
- api.report.version / api.report.prev.version are used for locating API signature files and should be integer numbers.
- release.file.ver is used as a part of build output file name.
- api.doc.version is used for the API document title
- mavne.pom.ver is used in pom.xml when release files are uploaded to OSSRH
  
  For ICU 69.1 GA, the contents of the properties file should be:
```
api.report.version = 69
api.report.prev.version = 68
release.file.ver = 69_1
api.doc.version = 69.1
maven.pom.ver = 69.1
```
Create build-local.properties in the ICU4J root directory

Edit build-local.properties to add a property - java7.bootclasspath (java6.bootclasspath for ICU57 to ICU62)

The value of javaX.bootclasspath should include JRE’s system library path. A set of jar files included in the system library path may vary depending on JRE vendor (Oracle, OpenJDK and IBM use different set of jars) and version. The easiest way to get the system library path is to run a simple Java program on the target JRE.

System.out.println(System.getProperty("sun.boot.class.path"));

For example, the values on my Linux system (Ubuntu) look like below:

java7.bootclasspath=/home/yoshito/jdk/oracle/jdk1.7.0_80/jre/lib/resources.jar:/home/yoshito/jdk/oracle/jdk1.7.0_80/jre/lib/rt.jar:/home/yoshito/jdk/oracle/jdk1.7.0_80/jre/lib/sunrsasign.jar:/home/yoshito/jdk/oracle/jdk1.7.0_80/jre/lib/jsse.jar:/home/yoshito/jdk/oracle/jdk1.7.0_80/jre/lib/jce.jar:/home/yoshito/jdk/oracle/jdk1.7.0_80/jre/lib/charsets.jar:/home/yoshito/jdk/oracle/jdk1.7.0_80/jre/lib/jfr.jar:/home/yoshito/jdk/oracle/jdk1.7.0_80/jre/classes

One Windows system, path separator back slash ‘\’ should be replaced with forward slash ‘/’. For example:

java7.bootclasspath=C:/jdk/oracle/7u80/jre/lib/resources.jar;C:/jdk/oracle/7u80/jre/lib/rt.jar;C:/jdk/oracle/7u80/jre/lib/sunrsasign.jar;C:/jdk/oracle/7u80/jre/lib/jsse.jar;C:/jdk/oracle/7u80/jre/lib/jce.jar;C:/jdk/oracle/7u80/jre/lib/charsets.jar;C:/jdk/oracle/7u80/jre/lib/jfr.jar;C:/jdk/oracle/7u80/jre/classes

Additional Configuration for GA

Add 2 more properties to build-local.properties

maven-ant-tasks.jar - Specify the path to the Maven Ant Tasks jar file.
gpg.user - Specify the ICU Project PGP key user name

For example, build-local.properties look like below:

java7.bootclasspath=/home/yoshito/jdk/oracle/jdk1.7.0_80/jre/lib/resources.jar:/home/yoshito/jdk/oracle/jdk1.7.0_80/jre/lib/rt.jar:/home/yoshito/jdk/oracle/jdk1.7.0_80/jre/lib/sunrsasign.jar:/home/yoshito/jdk/oracle/jdk1.7.0_80/jre/lib/jsse.jar:/home/yoshito/jdk/oracle/jdk1.7.0_80/jre/lib/jce.jar:/home/yoshito/jdk/oracle/jdk1.7.0_80/jre/lib/charsets.jar:/home/yoshito/jdk/oracle/jdk1.7.0_80/jre/lib/jfr.jar:/home/yoshito/jdk/oracle/jdk1.7.0_80/jre/classes
maven-ant-tasks.jar = /home/yoshito/java-libs/maven-ant-tasks/maven-ant-tasks-2.1.3.jar
gpg.user = ICU Project

Note: Maven Ant Tasks is no longer maintained. ICU team should find out another method to publish ICU artifacts to the repository (ticket ICU-12811).

Create maven local setting file $HOME/.m2/settings.xml if absent. Then add the Sonatype Nexus Repository Manager account information in the file. For example:

<settings>
  <servers>
    <server>
      <id>icu4j-releases</id>
      <username>yumaoka</username>
      <password>OSSRH-SonaType-Password</password>
    </server>
    <server>
      <id>icu4j-snapshots</id>
      <username>yumaoka</username>
      <password>OSSRH-SonaType-Password</password>
    </server>
  </servers>
</settings>

Building Release Files for Milestones/Release Candidates

Checkout tagged version - Use clean checkout of Git (SVN up to ICU62) tag (e.g. release-61-0-1, release-61-rc..) for building release files.

Run $ ant releaseVer - This build target generates ICU release files with version number in a folder release under the ICU4J root directory.

This ant target prints out warning messages as below if the build system is not properly configured.

_verify_config_for_release:
   [echo] ################################################################
   [echo] [WARNING] Insufficient Build Configuration for ICU4J Release
   [echo] JDK Tools Version: 1.8.0_152
   [echo] JRE 7 System Library Path: Not Defined!
   [echo] JCite Library Path: /home/yoshito/java-libs/jcite-1.13.0/build/jcite.jar:/home/yoshito/java-libs/jcite-1.13.0/lib/commons-discovery-0.4.jar:/home/yoshito/java-libs/jcite-1.13.0/lib/commons-logging-1.1.jar:/home/yoshito/java-libs/jcite-1.13.0/lib/java2html.jar`
   [echo] ################################################################

BUILD SUCCESSFUL
Total time: 5 minutes 31 seconds

If you see such warnings at the end of build log, fix the issue and run the target again.

Upload all files generated under the release directory to the ICU site.

Building Release Files for Final Release (GA)

A final (official) release files will be posted to the Maven Central Repository as well as the ICU project site. The build target releaseFinal generates all necessary files for the Maven repository and upload them after regular release build target is executed.

Checkout tagged version - Use clean checkout of Git (SVN up to ICU62) tag (e.g. release-61-1, release-61-2) for building release files.
Run $ ant releaseVer once to make sure there are no build configuration issues. Run $ ant clean to clean up build.
[Optional] In the next step, the build target invokes gpg to generate signature of build output files. gpg will request you to type in the passphrase for the ICU Project (icuintl@us.ibm.com) PGP key once. gpg pinentry is used for this purpose, but it may not work well on some systems when pgp was invoked from ant (such as Mac OS X). If this is the case, you would want to run gpg-agent to cache passphrase. More specifically, once you set up gpg-agent, run $ gpg -ab -u "ICU Project" foo.txt to sign arbitrary file. This operation will prompt you to type in the ICU Project key’s passphrase and cache it. So it does not need to ask you to type passphrase again while running the ant release target.

Run $ ant releaseFinal . This target generates release files for ICU site, as well as files for Maven Central Repository, then upload the files to OSSRH staging repository. You should see build log as below at the end.

   [deploy] Transferring 37K from icu4j-releases
   [deploy] Uploaded 37K
   [deploy] Uploading: com/ibm/icu/icu4j-localespi/61.1/icu4j-localespi-61.1-sources.jar.asc to repository icu4j-releases at https://oss.sonatype.org/service/local/staging/deploy/maven2
   [deploy] Transferring 0K from icu4j-releases
   [deploy] Uploaded 0K
   [deploy] Uploading: com/ibm/icu/icu4j-localespi/61.1/icu4j-localespi-61.1-javadoc.jar to repository icu4j-releases at https://oss.sonatype.org/service/local/staging/deploy/maven2
   [deploy] Transferring 22K from icu4j-releases
   [deploy] Uploaded 22K
   [deploy] Uploading: com/ibm/icu/icu4j-localespi/61.1/icu4j-localespi-61.1-javadoc.jar.asc to repository icu4j-releases at https://oss.sonatype.org/service/local/staging/deploy/maven2
   [deploy] Transferring 0K from icu4j-releases
   [deploy] Uploaded 0K

BUILD SUCCESSFUL
Total time: 6 minutes 19 seconds

After the successful target execution, copy files generated under release directory and upload them to ICU site.

Log on to OSSRH Nexus Repository Manager. Select “Staging Repositories” under “Build Promotion” on the left navigation pane, then type “com.ibm.icu” on the search field on the upper right corner. You should find a repository entry corresponding to the one just uploaded. Select the entry, and sanity check content. Once you confirm the contents, click “Close” on the menu. If the repository is closed successfully, you can “Release” after that. The release operation will promote the staging repository to production. It usually takes 20 to 30 minutes.