dcsh: Shell into docker container

dcsh

#!/usr/bin/env bash

# Tries to open a shell in the main docker container (e.g.  it ends in 'app' or 'api')
# Given a param, uses that as a pattern to look for at the end of the container name.
#
# Usage:
#
# dcsh <container_pattern>

set -o errexit      # Exit on most errors (see the manual)
set -o errtrace
set -o nounset      # Disallow expansion of unset variables
set -o pipefail     # Use last non-zero exit code in a pipeline

PATTERN="${1:-ap[pi]}"

container=$(docker-compose ps | tail -n +3 | cut -d' ' -f1 | grep "${PATTERN}_[0-9]\+" | sed 's/.*_\(.*\)_.*/\1/')

echo "Container: $container"
docker-compose exec $container sh -c "command -v bash >/dev/null 2>&1 && bash || sh"