Add argocd manifest generation path to all applications

mg.sh

#! /usr/bin/env bash

# This script is used to patch all argocd apps in a cluster
# the patch will add a new annotation to all apps
# the annotation will be used to prevent the app from being refreshed unnecessarily
# the following annotation will be added to all apps
# argocd.argoproj.io/manifest-generate-paths: .

set -euo pipefail

function usage {
    echo "Usage: mg [subcommand]"
    echo "Subcommands:"
    echo "  patch: Patch all argocd apps"
    echo "  help: Show this help message"
}

function main {
    # get all argocd apps
    apps=$(kubectl get applications -n argocd -o jsonpath='{.items[*].metadata.name}')
    # loop through all apps
    for app in $apps; do
        # get the current annotations
        annotations=$(kubectl get applications "$app" -n argocd -o jsonpath='{.metadata.annotations}')
        # check if the annotation already exists
        if [[ $annotations == *"argocd.argoproj.io/manifest-generate-paths"* ]]; then
            echo "app $app already patched"
        else
            # add the annotation
            kubectl patch applications "$app" -n argocd --type=merge -p '{"metadata":{"annotations":{"argocd.argoproj.io/manifest-generate-paths":"."}}}'
            echo "app $app patched"
        fi
    done
}

case "$1" in
    "patch")
        main
        ;;
    "help")
        usage
        ;;
    *)
        usage
        ;;
esac