Run the Gitlab runner locally in Docker (tested on macOS)

gitlab-runner-docker.sh

#!/bin/sh
# Based on https://stackoverflow.com/a/65920577/297793

# Manually start this first:
## docker run -d \
##  --name gitlab-runner \
##  --restart always \
##  -v "$HOME:$HOME" \
##  -v /var/run/docker.sock:/var/run/docker.sock \
##  gitlab/gitlab-runner:latest

job="$1"
if [ -z "$job" ]; then
    echo "USAGE: $0 <job-name>"
    exit 2
fi

echo "* Checking if gitlab-runner is running.."
if ! docker inspect gitlab-runner > /dev/null ; then
    echo
    echo "ERROR: gitlab-runner NOT RUNNING, run this first:"
    echo
    grep '^##' "$0" | sed 's/^## //'
    exit 10
fi

set -ex

docker exec -it -w "$PWD" gitlab-runner gitlab-runner exec docker "$job"