Keeping Ballerina Up to Date
This guide explains how to maintain your Ballerina installation up to date with the latest patch and minor releases.
- Understanding Ballerina Distributions
- Getting to know the Release Channels
- Updating the Ballerina Tool
- Listing All Local and Remote Distributions
- Removing a Distribution
- Updating to the Latest Preview/Patch Version
- Pulling a Specific Distribution
- Changing the Active Distribution
Understanding Ballerina Distributions
The Ballerina compiler is a software program, which validates the Ballerina source code and translates it to an executable program. Ballerina has a stable and production-ready official compiler called jBallerina, which targets the JVM.
Also, there is a plan to develop a native compiler called nBallerina in the future, which will target platforms such as Linux, Windows, and macOS.
Ballerina distribution is a term, which refers to these jBallerina and nBallerina compilers.
Getting to know the Release Channels
Ballerina distributions are released via two different release channels at the moment. One is the Swan Lake release channel and the other one is the 1.x release channel.
Ballerina yet does not have a release channel for nightly builds that give you access to the latest perhaps unstable features.
Versioning of the releases
Currently, the 1.x channel of the Ballerina distribution releases strictly follows SemVer with
major.minor.patch version numbers.
Patch releases of Ballerina distributions contain bug fixes and fixes for critical stability and security related issues. Occasionally, you would see on-demand patch releases as well.
Example patch releases: 1.0.6, 1.1.5, 1.1.10
These are feature releases of Ballerina distributions. Ballerina programs that you’ve written today should continue to work on these minor releases.
Example minor releases: 1.1.0, 1.2.0, 1.3.0
In the 1.x release channel, a minor release 1.x.0 is maintained by issuing a series of patch releases as 1.x.y. The maintenance of a particular minor release stops when there are two newer minor releases available.
In other words, patch releases for 1.x.0 stop when jBallerina 1.(x+2).0 is released. E.g., when 1.2 is available, maintaining 1.0.0 will be stopped.
If you haven’t installed Ballerina yet, see Installing Ballerina for the instructions.
Once the installation is complete, you would see the directory structure below inside the installation directory.
. ├── bin │ └── bal ├── dependencies │ └── jdk8u202-b08-jre ├── distributions │ ├── ballerina-slp4 │ ├── jballerina-1.1.0 │ ├── jballerina-1.2.8 │ └── ballerina-version └── lib └── ballerina-command-0.8.8.jar
distributions is the directory, in which all your installed distributions are maintained. Only one distribution from the above list can be active at a given time.
Note: The Ballerina Tool delegates most of the user requests to the active distribution. The commands such as
pushare delegated to the active distribution, while the commands such as
versionare handled by the tool itself.
E.g., when you invoke
bal build, the Ballerina Tool dispatches this request to the active distribution.
You can change this active distribution at any time or manage it using the Ballerina Tool. However, first, you need to update the Ballerina Tool to its latest version.
Updating the Ballerina Tool
bal update command updates the Ballerina Tool itself to the latest version. Ballerina Tool versions are independent of the Ballerina distribution versions. These tool updates are expected to be rare compared to distribution releases.
→ bal update Fetching the latest version from the remote server... Downloading ballerina-command-0.8.8 Downloading ballerina-tool-0.8.8 100% [====================================] 1/1 MB Updated to latest tool version: 0.8.8 Cleaning old files... Ballerina Tool updated successfully
Managing your Ballerina Distributions
After updating the Ballerina Tool, you can use the
bal dist command of it to manage Ballerina distributions. The
bal help dist output below shows all the details about the
bal dist command.
→ bal help dist NAME bal-dist - Manage Ballerina distributions SYNOPSIS bal dist <command> <-h | --help> bal dist <command> [<args>] DESCRIPTION Dist enables you to install, update, and switch among Ballerina distributions from patch and minor release channels. OPTIONS -h, --help Print usage details of a command. BALLERINA COMMANDS Here is a list of available subcommands: update Update to the latest patch version of the active distribution pull Fetch a distribution and set it as the active version use Set a distribution as the active distribution list List locally and remotely available distributions remove Remove distributions in your local environment Use 'bal help dist <command>' for more information on a specific command.
Most of these subcommands are self-explanatory. Therefore, the sections below introduce them briefly.
Listing All Local and Remote Distributions
bal dist list command lists the installed distributions in your local environment. It also lists the distributions available for you to download.
→ bal dist list Distributions available locally: [1.1.0] jballerina version 1.1.0 [1.2.5] jballerina version 1.2.5 * [1.2.8] jballerina version 1.2.8 [slp3] ballerina version slp3 Distributions available remotely: 1.* channel [1.0.0] jballerina version 1.0.0 [1.0.1] jballerina version 1.0.1 [1.0.2] jballerina version 1.0.2 [1.0.3] jballerina version 1.0.3 [1.0.4] jballerina version 1.0.4 [1.0.5] jballerina version 1.0.5 [1.1.0] jballerina version 1.1.0 [1.1.1] jballerina version 1.1.1 [1.1.2] jballerina version 1.1.2 [1.1.3] jballerina version 1.1.3 [1.1.4] jballerina version 1.1.4 [1.2.0] jballerina version 1.2.0 [1.2.1] jballerina version 1.2.1 [1.2.2] jballerina version 1.2.2 [1.2.3] jballerina version 1.2.3 [1.2.4] jballerina version 1.2.4 [1.2.5] jballerina version 1.2.5 [1.2.6] jballerina version 1.2.6 [1.2.7] jballerina version 1.2.7 [1.2.8] jballerina version 1.2.8 Swan Lake channel [slp1] Preview 1 [slp2] Preview 2 [slp3] Preview 3 [slp4] Preview 4 Use 'bal help dist' for more information on specific commands.
Note: The star (*) indicates the active distribution.
Removing a Distribution
bal dist remove <distribution> command allows you to delete a particular distribution from your local environment. If you’ve been updating Ballerina regularly, you may have accumulated many unused distribution versions. This command helps you to clean them up.
→ bal dist remove 1.2.5 Distribution '1.2.5' successfully removed
Updating to the Latest Preview/Patch Version
bal dist update command updates your active distribution to the latest patch version.
E.g., If the active distribution in your environment is
1.2.7 and there exists the patch version
1.2.8 in our servers, this command will fetch and set it as the active distribution.
→ sudo bal dist update Fetching the latest patch distribution for 'jballerina-1.2.8' from the remote server... Fetching the '1.2.8' distribution from the remote server... Downloading 1.2.8 100% [==========================================================] 96/96 MB Successfully set the latest patch distribution '1.2.8' as the active distribution
Note: If the active distribution in your environment is
slp4, it will bump to the next Swan Lake Preview version, which is
slp5, and will update to it.
Pulling a Specific Distribution
bal dist pull <distribution> command downloads a particular distribution and stores it in your local environment. It also sets the fetched distribution as the active distribution.
→ bal dist pull 1.2.5 Fetching the '1.2.5' distribution from the remote server... Downloading 1.2.5 100% [=====================================================================================] 236/236 MB (0:03:33 / 0:00:00) Fetching the dependencies for '1.2.5' from the remote server... Dependency 'jdk8u202-b08-jre' is already available locally '1.2.5' successfully set as the active distribution
Changing the Active Distribution
bal dist use <distribution> command sets a particular distribution version as the active one.
→ bal dist use 1.2.5 '1.2.5' is the current active distribution version