Mix just syntax with bash in a rule

[mihaigalos]

Hi there,

What is standard practice for mixing in a just variable into bash in the following code?:

build tool:
    docker_image := docker_container_registry + "/" + {{tool}}
    #! /bin/bash
    docker build -t {{docker_image}} .

Here, I would like to compose docker_image independently of the bash script but then use it in the script.

[casey]

It currently isn't possible to create just variables inside a recipe. However, since you're using a shebang, you could do this:

build tool:
    #!/usr/bin/env bash
    docker_image={{ docker_container_registry }}/{{ tool }}
    docker build -t $docker_image .

[mihaigalos]

Thank you! :)

[casey]

You are most welcome!

[casey]

I edited my answer to be a little nicer. Also, I just released v0.9.6, which has a new join function, so you can do:

build tool:
    #!/usr/bin/env bash
    docker_image={{ join(docker_container_registry, tool) }}
    docker build -t $docker_image .

[mihaigalos]

Very nice. Awesome tool. Kudos!

[mihaigalos]

btw, I guess a shebang is not necessary anymore if $docker_image is not used afterwards:

build tool:
    docker build -t {{ join(docker_container_registry, tool) }} .