Gulp Docker Compose

Hey there ;) The binding between gulp and docker compose lies ahead.

Installation

Just make sure you have installed docker, docker-compose and node, and the current user is in the docker group in order to be able to run docker commands without sudo.

Usage

Typical gulpfile.js

const gulp = require('gulp');
const clean = require('gulp-clean');
const babel = require('gulp-babel');
const path = require('path');
const plumber = require('gulp-plumber');
const vfs = require('vinyl-fs');
const GulpDockerCompose = require('gulp-docker-compose').GulpDockerCompose;

const srcFolder = `${__dirname}/src/`;
const dstFolder = `${__dirname}/build/`;

// clean the previous build
gulp.task('clean', function() {
    return gulp.src(dstFolder, {read: false})
        .pipe(clean({force: true}));
});

// compile js
gulp.task('build', ['clean'], function() {
    // vfs follows symlinks
    return vfs.src(srcFolder+'/**/*.js')
        .pipe(plumber())
        .pipe(babel({
            presets: [
                ["env", {
                    "targets": {
                        "node": "4"
                    },
                    "modules": "commonjs",
                }],
            ]
        }))
        .pipe(vfs.dest(dstFolder));
});

var gulpDocker = new GulpDockerCompose(gulp, {
    serviceName: 'app',
    tasks: {
        run: {
            name: 'run',
            dependences: ['build'],
        },
        restart: {
            name: 'restart',
            dependences: ['build'],
        },
        watchYML: {
            name: 'watch-yml',
        },
    },
    extraArgs: {
        upOnRun: '--scale app=3',
        upOnYMLChange: '--scale app=3',
    },
    exposeCLICommands: true,
    exposeStdOut: false,
    exposeStdErr: true,
    projectFolder: __dirname,
});

gulp.task('watch', function() {
    gulp.watch([srcFolder+'/**/*'], ['build', 'restart']);
});
gulp.task('default', ['build', 'watch', 'watch-yml', 'run']);

Options and arguments

GulpDockerCompose takes 2 arguments:

• gulp - the reference to gulp object to work with
• options - an object of various options described below

Options

• serviceName (optional) - the name of the service to build (typically, the one in docker-compose.yml which has build directive)
• tasks (optional) - the list of tasks to create, an object with two keys: run - stands for run compose task, and restart - for restart
• hangOnInt (optional, default: true) - when the Ctrl+C combo is pressed on gulp watch, it stops docker compose. If the option is set to false, it will not override process.on('SIGINT') handler, but in this case, the docker compose (started as a daemon) will not be terminated. You may call gulpDocker.stopDockerCompose() manually in this case.
• exposeCLICommands (optional, default: false) - being set to true, allows applied docker-compose cli commands to be displayed
• exposeStdOut (optional, default: false) - expose stdout of cli command
• exposeStdErr (optional, default: true) - expose stderr of cli command
• projectFolder (optional) - sets project current folder. Should be set and correct in order to use 'watchYML' task

Both tasks have the same format: an object with the following keys:

• name - the name of the task (an alias #SERVICE_NAME# is available and will get replaced with the value of serviceName)
• dependences - the list of tasks which should be executed before gulp enters this task

If no tasks block specified, they can be created with makeRunTask() and makeRestartTask() respectively like the following:

gulpDocker.makeRunTask('run:#SERVICE_NAME#', ['build']);
gulpDocker.makeRestartTask('restart:#SERVICE_NAME#', ['build']);

Typical docker-compose.yml

version: '3'

services:
  app:
    build: .
    depends_on:
          - "db"
    ports:
      - "3101:3012"
    environment:
      - DB_URL=mongodb://db:27017/mydatabase
      - PORT=3012
      - ROOT_URL=http://localhost
  db:
      image: "mongo"
      ports:
        - "3110:27017"

Note that the corresponding Dockerfile should be present inside the same folder in order to build the service.

Under the hood

In fact, the module only launches the following docker-compose commands:

On run and restart tasks:

docker-compose up -d --build

On docker-compose.yml file changed:

docker-compose up -d --remove-orphans

On Ctrl+C:

docker-compose stop

License

MIT

Enjoy ;)