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Development

This doc explains how to set up a development environment so you can get started contributing to tanzu apps plugin. Also take a look at:

Prerequisites

Follow the instructions below to set up your development environment. Once you meet these requirements, you can make changes and deploy your own version of apps plugin!

Before submitting a PR, see also CONTRIBUTING.md.

Install requirements

You must install these tools:

  • go: for compiling the plugin as well as other dependencies - 1.20+
  • tanzu CLI: for adding the plugin
  • git: for source control

Setup your development environment

To check out this repository:

  1. Create your own fork of this repo
  2. Clone it on your machine:
git clone git@github.com:${YOUR_GITHUB_USERNAME}/apps-cli-plugin.git
cd apps-cli-plugin
git remote add upstream https://github.com/vmware-tanzu/apps-cli-plugin.git
git remote set-url --push upstream no_push

Adding the upstream remote sets you up nicely for regularly syncing your fork.

Once you reach this point you are ready to do a full build and install as described below.

Building

Once you've setup your development environment, let's build apps plugin. go mod is used and required for dependencies.

Install builder plugin

Install the tanzu builder and test plugins. Set variable OS to linux, darwin or windows depending on your OS:

TANZU_VERSION=$(cat TANZU_VERSION)
TANZU_HOME=$HOME/tanzu
curl -Lo admin-plugins.tar.gz https://github.com/vmware-tanzu/tanzu-framework/releases/download/${TANZU_VERSION}/tanzu-framework-plugins-admin-${OS}-amd64.tar.gz
tar -xzf admin-plugins.tar.gz -C ${TANZU_HOME}
tanzu plugin install builder --local ${TANZU_HOME}/admin-plugins
tanzu plugin install test --local ${TANZU_HOME}/admin-plugins

Building Apps CLI Plug-in

To build and install the apps plugin, run: (repeat this step any time you pull new source code to get the latest)

make install

Note : For machines with arm64 processor run make install GOHOSTARCH=amd64

Verify installed plugins

tanzu plugin list

Publishing Apps CLI Plug-in artifact to any registry

Since Tanzu CLI supports installing plugins from an OCI repository, the generated artifact for Apps CLI Plugin release can be uploaded to be publicly accessible in any repository like, for example, GitHub Container Registry.

To publish the artifact, there are some steps that need to be done before running make publish-oci.

  1. Login to your registry.

  2. Export discovery and distribution environment variables to be used in the make command.

export DISCOVERY_REPO=<your-registry>/USERNAME/apps-cli-plugin/discovery
export DISTRIBUTION_REPO=<your-registry>/USERNAME/apps-cli-plugin/distribution

  1. Clear the artifacts directory and then run make build to fill it with the corresponding binaries. If this folder has more than one Apps Plug-in version, all of them will be uploaded in the next step.

  2. Run make publish-oci command to push to the registry.

make publish-oci

The output of this last step is similar to the following:

2023-03-09T11:59:51-05:00 [ℹ]  Publishing plugin: apps to <your-registry>/USERNAME/apps-cli-plugin/distribution/apps-darwin-amd64:v0.11.1-dev-4ea1dafb
2023-03-09T12:00:22-05:00 [✔]  Successfully published plugin: apps
2023-03-09T12:00:22-05:00 [ℹ]  Publishing discovery image to: <your-registry>/USERNAME/apps-cli-plugin/discovery
2023-03-09T12:00:29-05:00 [✔]  Successfully published CLIPlugin resources to discovery image: <your-registry>/USERNAME/apps-cli-plugin/discovery

Testing

Unit testing

All unit tests can be run on any machine with go 1.17+ installed.

make test

Acceptance testing

In order to use the CLI, the runtime dependencies need to be installed on the target Kubernetes cluster.

BUNDLE=${REGISTRY_URL/REPO:tag}
make integration-test

Note: BUNDLE env var is used by e2e tests to push source code bundle. This image is not deleted after the test.

Add test

Any contribtuions for bug fix or feature requests will require unit and integration tests as part of the PR.

Cluster requirement

Iterating

As you make changes to the code-base, there are several special cases to be aware of:

  • If you change/add Cartographer APIs, then you must run make prepare to update generated code. You might also require creating fakes via dies for easier testing.

  • If you change/add dependencies (including adding an external dependency), then you must run make prepare command. In some cases, if newer dependencies are required, you need to run "go get" manually.

  • If you change/add any help text for flags on any command, then you must run make docs command. This will generate command documentation. CI will fail if this content is not kept up to date.

  • If you change/add code completion, then follow the steps to ease testing of this feature. Add the prefix __complete to your command e.g.

    tanzu __complete apps workload tail spring-petclinic --component=

    This will output the completion suggestions and the ShellCompDirective Add logs using cobra.CompDebugln(msg string, printToStdErr bool) and set BASH_COMP_DEBUG_FILE env variable to a local file path to see logs without adding new entries to the suggestions. Make sure to remove any logs before sending a PR

Once the codegen, dependency is correct, reinstalling the plugin is simply:

make install

Or you can uninstall and completely redeploy apps plugin.

Uninstalling

You can delete apps plugin with:

tanzu plugin delete apps