Support global aliases for commands

[pkosiec]

Description

Changes proposed in this pull request:

• Expand aliases when executing commands
• Add @Botkube list aliases command
• Modify @Botkube list executors to include aliases for executors
• Unify output of @Botkube list sources command
• Update help
  • Remove notice about required prefix
  • Add ability to list aliases
• Update E2E tests
• Add basic validation for aliases commands
  • I thought about checking executor names, but I wouldn't like to limit users. It's good to allow defining aliases for Botkube commands as well. Such validation would be too cumbersome for us to maintain (import cycles when it comes to cmd verbs) so I'd postpone this until someone reports an issue.

TODO

• Update documentation - in a separate PR to botkube-docs.

Screenshots

Help

List executors

List sources

Executing commands

List aliases

Filtering

Testing

Check out the PR

Use the following config:

plugins:
  repositories:
    botkube:
      url: https://storage.googleapis.com/botkube-plugins-latest/plugins-index.yaml

communications:
  "default-group":
    socketSlack:
      enabled: true
      appToken: "xapp-..."
      botToken: "xoxb-..."
      notification:
        type: "short"
      channels:
        "default":
          name: botkube-demo
          bindings:
            executors:
              - kubectl-read-only
              - helm
              - plugin-based
            sources:
              - k8s-all-events
              - k8s-recommendation-events
              - plugin-based

executors:
  'kubectl-read-only':
    kubectl:
      enabled: true
  helm:
     botkube/helm:
       config:
         helmCacheDir: /tmp/helm/.cache
         helmConfigDir: /tmp/helm/
         helmDriver: secret
       enabled: true
  'plugin-based':
    botkube/[email protected]:
      enabled: false
      config:
        changeResponseToUpperCase: true

aliases:
  kc:
    command: kubectl
    displayName: "Kubectl alias"
  k:
    command: kubectl
    displayName: "Kubectl alias"
  kgp:
    command: kubectl get pods
    displayName: "Get pods"
  h:
    command: helm
    displayName: "Helm alias"
  e:
    command: echo
    displayName: "Echo alias"

sources:
  'plugin-based':
    displayName: "K8s ConfigMaps changes"
    botkube/cm-watcher:
      enabled: true
      config:
        configMap:
          name: cm-watcher-trigger
          namespace: botkube
          event: ADDED

settings:
  clusterName: "dev"
  upgradeNotifier: false

Run a few commands:

@Botkube kgp -n botkube
@Botkube h version
@Botkube k get po

Run @Botkube list aliases
Run @Botkube list executors

Related issue(s)

#870

[josefkarasek]

Overall LGMT. With minor nits.