Export current user id in makefile for docker-compose

Question

I trying to pass the current user id into docker-compose.yml

How it looks in docker-compose.yml

version: '3.4'

services:
    app:
        build:
            context: ./
            target: "php-${APP_ENV}"
        user: "${CURRENT_UID}"

Instead of CURRENT_UID=$(id -u):$(id -g) docker-compose up -d I've wrote makefile

#!/usr/bin/make

SHELL = /bin/sh

up: 
    export CURRENT_UID=$(id -u):$(id -g)
    docker-compose up -d

But CURRENT_UID still empty when I run make up

Is there a possible export uid in makefile?

Possible duplicate of [Why exported variables in Makefile is not received by executable?](https://stackoverflow.com/questions/6995107/why-exported-variables-in-makefile-is-not-received-by-executable) — David Maze, Apr 30 '19 at 10:19
The `export` and the command you're running need to be on the same Makefile line. (The same is true for Dockerfile `RUN` commands for the same reason.) — David Maze, Apr 30 '19 at 10:20
Don't work https://gist.github.com/matchish/ed0f03bc58d73eb2e94876a512d4205a — matchish, Apr 30 '19 at 10:34
`$(VARIABLE)` is Make expansion syntax. You need `$$` to inject a dollar sign, or the GNU make `$(shell command ...)` extension. — David Maze, Apr 30 '19 at 10:42
Do not use `$(shell ...)` inside a recipe. It is unnecessary and simply creates confusion. — MadScientist, Apr 30 '19 at 17:38

score 22 · Accepted Answer · answered May 01 '19 at 15:34

22

Here is my solution

#!/usr/bin/make

SHELL = /bin/sh

CURRENT_UID := $(shell id -u)
CURRENT_GID := $(shell id -g)

export CURRENT_UID
export CURRENT_GID

up: 

    docker-compose up -d

answered May 01 '19 at 15:34

matchish

2,172
3
15
32

1

This solution solved for me. Thanks! I just changed by setting like this: `docker run -u ${CURRENT_UID}:${CURRENT_UID} ... ` – Ricardo M S Jul 19 '19 at 23:05
1

What does the SHELL variable do? Bash scripting is case sensitive after all? – goonerify Jun 11 '20 at 18:05
1

Yes! Been looking for this for over an hour! thanks. Works directly in a Makefile w/o the SHELL = /bin/sh part – newms87 Apr 19 '21 at 16:00
This answer https://stackoverflow.com/a/589300/4175647 says what does SHELL variable do – Nick Roz Jun 10 '21 at 16:42
What happens if the user has changed their group with `newgrp`. Using `$(shell id -g)` will create a new sub-shell and return the default group not the current group, won't it? – dmbailey Jun 29 '21 at 15:46

score 3 · Answer 2 · answered Dec 04 '19 at 13:50

3

Another option is to use env:

Makefile:

SHELL=/bin/bash

UID := $(shell id -u)

up:
    env UID=${UID} docker-compose up -d

answered Dec 04 '19 at 13:50

Eddie

1,266
5
22
40

Export current user id in makefile for docker-compose

2 Answers2