generate argocd app of apps from an existing project/applications

argocd-app-of-apps-generation.sh

#!/bin/bash
output_file="all_applications-$project_name.yaml"
echo "" > "$output_file"

project_yaml=$(kubectl get AppProject "$project_name" -n argocd -o yaml)
updated_project_yaml=$(echo "$project_yaml" | yq eval 'del(.metadata.creationTimestamp, .metadata.generation, .metadata.resourceVersion,.status, .metadata.uid, .metadata.annotations."kubectl.kubernetes.io/last-applied-configuration")' -)
echo "$updated_project_yaml" >> "$output_file"
echo '---' >> "$output_file"

for app_name in $(kubectl get applications -n argocd -o custom-columns=:.metadata.name --no-headers); do
 
    app_yaml=$(kubectl get application "$app_name" -n argocd -o yaml)

 
    is_matching=$(echo "$app_yaml" | yq e '.spec.project == env(project_name)' -)

    if [ "$is_matching" = "true" ]; then

        updated_yaml=$(echo "$app_yaml" | yq eval 'del(.metadata.creationTimestamp, .metadata.generation, .metadata.resourceVersion, .metadata.uid, .status, .metadata.annotations."notified.notifications.argoproj.io", .metadata.annotations."kubectl.kubernetes.io/last-applied-configuration")' -)

        echo "$updated_yaml" >> "$output_file"
        echo '---' >> "$output_file"
    fi
done

# Run the script
# chmod +x argocd-app-of-apps-generation.sh
# project_name=<put-the-project-name-here> ./argocd-app-of-apps-generation.sh