Document Workflow Update internals (#6448) #3076

	name: 'Trigger Docker image build'

	on:
	push:
	branches:
	- main
	- release/*
	- cloud/*

	jobs:
	trigger:
	name: 'trigger Docker image build'
	runs-on: ubuntu-latest

	defaults:
	run:
	shell: bash

	steps:
	- name: Get git branch name
	id: get_branch
	run: \|
	echo branch="${GITHUB_REF#refs/heads/}" >> "$GITHUB_OUTPUT"

	- name: Generate a token
	id: generate_token
	uses: tibdex/github-app-token@b62528385c34dbc9f38e5f4225ac829252d1ea92
	with:
	app_id: ${{ secrets.TEMPORAL_CICD_APP_ID }}
	private_key: ${{ secrets.TEMPORAL_CICD_PRIVATE_KEY }}

	- name: Dispatch docker builds Github Action
	env:
	PAT: ${{ steps.generate_token.outputs.token }}
	PARENT_REPO: temporalio/docker-builds
	PARENT_BRANCH: ${{ toJSON('main') }}
	WORKFLOW_ID: update-submodules.yml
	REPO: ${{ toJSON('temporal') }}
	BRANCH: ${{ toJSON(steps.get_branch.outputs.branch) }}
	run: \|
	curl -fL -X POST -H "Accept: application/vnd.github.v3+json" -H "Authorization: token $PAT" "https://api.github.com/repos/$PARENT_REPO/actions/workflows/$WORKFLOW_ID/dispatches" -d '{"ref":'"$PARENT_BRANCH"', "inputs": { "repo":'"$REPO"', "branch":'"$BRANCH"' }}'

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