matchtree: regex uses substring iterator for start of search #3259

	on: push
	name: CI
	jobs:
	test:
	runs-on: ubuntu-latest
	steps:
	- name: go
	uses: actions/setup-go@v1
	with:
	go-version: 1.16.x
	- name: checkout
	uses: actions/checkout@v2
	- name: test
	run: go test ./...

	# We build a shared docker image called "zoekt". This is not pushed, but is
	# used for creating the indexserver and webserver images.
	docker:
	if: github.ref == 'refs/heads/master'
	runs-on: ubuntu-latest
	needs: test
	steps:
	- name: checkout
	uses: actions/checkout@v2

	# This is the same tag we used for zoekt in the infrastructure repo.
	- name: version
	id: version
	run: .github/workflows/docker-version.sh

	- name: build-zoekt
	uses: docker/build-push-action@v1
	with:
	repository: zoekt
	tags: "latest"
	add_git_labels: "true"
	push: "false"
	build_args: VERSION=${{ steps.version.outputs.value }}

	- name: build-push-webserver
	uses: docker/build-push-action@v1
	with:
	repository: sourcegraph/zoekt-webserver
	tags: ${{ steps.version.outputs.value }},latest
	dockerfile: Dockerfile.webserver
	add_git_labels: "true"
	username: ${{ secrets.DOCKER_USERNAME }}
	password: ${{ secrets.DOCKER_PASSWORD }}

	- name: build-push-indexserver
	uses: docker/build-push-action@v1
	with:
	repository: sourcegraph/zoekt-indexserver
	tags: ${{ steps.version.outputs.value }},latest
	dockerfile: Dockerfile.indexserver
	add_git_labels: "true"
	username: ${{ secrets.DOCKER_USERNAME }}
	password: ${{ secrets.DOCKER_PASSWORD }}

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