Running Elm 0.18 and 0.19 on the same machine

Question

I have a Mac and elm 0.18 is installed in /usr/local/bin.

This was fine since I an using elm 0.18 in a project.

Now I am responsible for project that users elm 0.19.

Is is possible to have both 0.18 and 0.19 on my machine.

for example

workspace/project1 uses elm 0.18 workspace/project2 uses elm 0.19

wherever I run elm --version is reports 0.18, even in the project directory that has elm dependency defined as 0.19.

Answer 1

its easy enough to do run two versions of elm - just install the version you want into your directory npm install elm@0.18 and use npm scripts or npx so that you are using local versions.

Your challenge will be that some of the editor support has an option to choose between which version you want support with, and toggling that can become annoying.