Helm Chart Bump Action

Overview

GitHub Action that bumps a Helm chart to the latest version matching Docker image tag from Docker Hub

The action:

• Fetches image tags from Docker Hub for a namespace/repository
• Filters tags using a configurable regex pattern
• Selects the latest matching tag
• Updates version and appVersion in Chart.yaml
• Commits and pushes the change when an update is needed

Usage

name: Bump Helm chart

on:
  schedule:
    - cron: "0 2 * * *"

jobs:
  bump-chart:
    permissions:
      contents: write
    runs-on: ubuntu-latest
    steps:
      - name: Bump chart
        uses: Scalified/helm-chart-bump-action@v1
        with:
          token: ${{ secrets.TOKEN }}
          dockerhub-namespace: your-org
          dockerhub-repository: your-image
          docker-image-tag-pattern: '^v?[0-9]+\.[0-9]+\.[0-9]+$'
          chart-file-path: charts/your-chart/Chart.yaml

Inputs

Input	Description	Required	Default
token	GitHub token with permissions to push changes	No	${GITHUB_TOKEN}
dockerhub-namespace	Docker Hub namespace (organization or user)	No	library
dockerhub-repository	Docker Hub repository name	Yes
docker-image-tag-pattern	Regex pattern used to match tags	No	SemVer version pattern
chart-file-path	Path to Helm chart Chart.yaml (relative to repository root)	Yes

Outputs

Output	Description
latest-app-version	The latest Docker image tag matching docker-image-tag-pattern

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