Bash/Shell boilerplate I created to manage any Linux-based project in a Git Repo that has a corresponding Dockerfile. Command-line interface, with a couple variables exposed

boilerplate.sh

#!/bin/bash
: '
// boilerplate.sh
v.0.1 - 2022-10-11 - Matt Seabrook
See README.md or CTRL + F "Main Entrypoint" in this file
'

APP_PORT=4000                            # Port to run the app on
DOCKER_IMAGE="my_app_img"                # Name of the docker image
DOCKER_CONTAINER="my_app"                # Name of the docker container


: '
/*
================
cli_interface
Process CLI arguments
@param      $@      string(s)       All of the ARGVs provided via stdin, $2, $3, etc.
================
*/
'
function cli_interface {
    case $1 in
        #
        # Attach to the Docker Container
        #
        -a|-A|--a|--A|-attach|--attach)
            # Fix this later, to check if the Container even exists
            if [ $(docker inspect -f '{{.State.Running}}' $DOCKER_CONTAINER) = "true" ]; then
                docker attach $DOCKER_CONTAINER
            else
                echo Container $DOCKER_CONTAINER is not running. Use: docker start $DOCKER_CONTAINER
            fi
        ;;
        #
        # Build the Docker Image
        #
        -b|-B|--b|--B|-build|--build)
            docker build -t $DOCKER_IMAGE .
        ;;
        #
        # Create & Run the Docker Container
        #
        -c|-C|--c|--C|-create|--create)
            docker run \
            -it \
            -p 127.0.0.1:$APP_PORT:$APP_PORT \
            --name $DOCKER_CONTAINER \
            $DOCKER_IMAGE \
            bash
        ;;
        #
        # Help
        #
        -h|-H|--h|--H|-help|--help)
            cli_help
        ;;
        # No arguments
        "")
            cli_help
        ;;
        *)
            echo "ERROR: Invalid command line arguments/parameters: $@"
            echo
            echo "Usage: ./boilerplate.sh {switch} {parameter}"
            echo
            cli_help
        ;;
    esac
}


: '
/*
================
cli_help
Print help related text on the screen like a standard CLI application
================
*/
'
function cli_help {
    echo
    echo -e "Usage: ./boilerplate.sh\t{switch}\tOptions..."
    echo
    echo -e "\t-a, -A, --a, --A, -attach, --attach\tAttach to this project's Docker Container."
    echo -e "\t-b, -B, --b, --B, -build, --build\t\Build Docker Image as specified in the current folder (Dockerfile)."
    echo -e "\t-c, -C, --c, --C, -create, --create\tCreate & Run the Docker Container in terminal."
    echo -e "\t-h, -H, --h, --H, -help, --help\tDisplay this help  text."
    echo
    echo "Please see README.md for more specific information"
    echo
}


: '
//==========================================================================

/*
================
Main Entrypoint
Upon execution of the shell script
================
*/
'

cli_interface "$@"