# Internal reusable workflow for merging platform-specific image digests into a

# single multi-platform manifest and pushing to GHCR.

#

# This workflow takes the individual platform image digests created by _build.yml,

# combines them into a multi-platform manifest, and pushes the final tagged images.

name: Merge Multi-Platform Manifest

on:

workflow_call:

inputs:

docker_tags:

description: "Docker tags configuration (JSON array or raw tags)"

required: true

type: string

env:

REGISTRY_IMAGE: ghcr.io/sourcebot-dev/sourcebot

jobs:

merge:

runs-on: ubuntu-latest

permissions:

packages: write

steps:

- name: Download digests

uses: actions/download-artifact@v4

with:

path: /tmp/digests

pattern: digests-*

merge-multiple: true

- name: Set up Docker Buildx

uses: docker/setup-buildx-action@v3

- name: Extract Docker metadata

id: meta

uses: docker/metadata-action@v5

with:

images: ${{ env.REGISTRY_IMAGE }}

tags: ${{ inputs.docker_tags }}

- name: Login to GitHub Packages Docker Registry

uses: docker/login-action@v3

with:

registry: ghcr.io

username: ${{ github.actor }}

password: ${{ secrets.GITHUB_TOKEN }}

- name: Create manifest list and push

working-directory: /tmp/digests

run: |

docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \

$(printf '${{ env.REGISTRY_IMAGE }}@sha256:%s ' *)

- name: Inspect image

run: |

docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }}