helm-charts/.github/actions/override-chart-deps/action.yaml

name: "Override chart dependencies"
description: "Overrides the dependencies for a Helm chart"
inputs:
  chart:
    required: true
    description: "Which chart to override the dependencies for"
  overrides:
    required: true
    description: "A JSON encoded list of dependency overrides"

runs:
  using: "composite"
  steps:
    - name: Override dependencies
      shell: bash
      run: |
        overrides=( $(yq --null-input e -o=j -I=0 '${{ inputs.overrides }}[]' ) )
        chartFile="charts/${{ matrix.chart }}/Chart.yaml"

        if [[ ! -f  ${chartFile} ]]; then
          echo "Could not find ${chartFile}"!
          exit 1
        fi

        for override in "${overrides[@]}"; do
          name=$(echo "$override" | yq e '.name' -)
          repository=$(echo "$override" | yq e '.repository' -)
          version=$(echo "$override" | yq e '.version' -)

          yq -i "(.dependencies[] | select(.name == \"$name\").repository) |= \"$repository\"" "${chartFile}"
          yq -i "(.dependencies[] | select(.name == \"$name\").version) |= \"$version\"" "${chartFile}"
        done

        echo "Resulting chart:"
        cat ${chartFile}