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So you want to test a fancy Node.js CLI tool, but do not have Node.js installed, or do not want to install it locally? Docker to the rescue!
You have Docker installed on your laptop. At the time of writing I have Docker Community Edition
Version 17.03.0-ce-mac2 (15654).
A NPM installable Node.js CLI tool, you want to try. In this tutorial, I will explore https://github.com/santinic/how2.
Step one: Define and build your Docker image
The first thing to do, is to define a new Docker image, which will run our Node.js app. A simple Dockerfile will do. In your favourite text editor create a new file called
Dockerfile and fill in the content:
RUN npm install -g how2
Save the file.
Back in the Terminal, in the directory you have placed the Dockerfile, built the image with:
$ docker build -t how2-node .
how2-node is the image name, I have chosen.
Step two: Run the container and test the CLI tool
After you have successfully built the image, it’s time to run the image in interactive mode, and enter the bash shell of the running container:
$ docker run --name myhow2 --rm -ti how2-node /bin/bash
myhow2 is the name I have chosen for the container.
After running this command, you should be in the interactive shell of the container.
To test the CLI tool (
how2 in this case), I would run something like:
$ how2 untar
… and enjoy the results. After you have finished, exit the shell with
This was a minimal example, how you can easily try new Node.js tools without messing with your local environment.