pullcharts

This script automates the process of downloading and decompressing Helm charts based on specifications from a values.yaml file. It ensures that the specified versions of Helm charts are pulled from their repositories, downloaded to a compressed directory, and then extracted into a charts directory within the current working directory.

Use case

kuberise is an application that deploys several helm charts to kubernetes cluster. pullcharts pulls all those helm chart source code into a folder and makes it easier to check the source codes or search for a specific word among all of them.

Prerequisites

Before running this script, ensure you have the following installed:

• Helm 3: The script uses helm pull to download chart archives.
• yq (version 4 or above): Used for parsing the values.yaml file.
• Bash environment: The script is a Bash script, requiring a Unix-like environment to run.

Getting Started

1. Clone the repository or download the script to your local machine where you intend to manage Helm charts.

2. Ensure helm and yq are installed and accessible from your command line. You can verify their installation by running helm version and yq --version.

3. Prepare your values.yaml file according to your Helm chart requirements. The file should follow the structure outlined below:

   helmCharts:
     keycloak:
       repoURL: https://charts.bitnami.com/bitnami
       chart: keycloak
       targetRevision: 18.4.0
     airflow:
       repoURL: https://airflow.apache.org
       chart: airflow
       targetRevision: 1.12.0

   Ensure the file is located at ../kuberise/app-of-apps/values.yaml relative to the script or adjust the valuesFile variable in the script to match your file's location.

Usage

To run the script, navigate to the directory containing the script and execute it from the terminal:

./pullcharts.sh

Notes

• The script checks if a chart is already downloaded and up-to-date before proceeding with the download and extraction. This behavior minimizes unnecessary network usage and disk operations.
• If you encounter permissions issues, ensure the script is executable by running chmod +x pullcharts.sh.
• The script assumes connectivity to the Helm chart repositories specified in your values.yaml file.

Contributing

Feel free to fork the repository and submit pull requests to improve the script or extend its capabilities.