'plugin install' does nothing in Dockerfile

[sudocovik]

I'm using pulumi/pulumi-nodejs docker image to interact with pulumi but can't get pulumi plugin install to work.
Image build works, no errors reported but when I exec into container and run pulumi up it downloads plugins again.
pulumi plugin ls shows no plugins.

Dockerfile:

FROM pulumi/pulumi-nodejs:latest AS production

COPY --from=alpine/helm:latest /usr/bin/helm /usr/bin/helm

RUN apt-get update -y && \
    apt-get install -y \
        jq && \
    rm -rf /var/lib/apt/lists/*

COPY package-lock.json .

RUN pulumi plugin install resource digitalocean $(cat package-lock.json | jq --raw-output '.dependencies."@pulumi/digitalocean".version') --exact

RUN pulumi plugin install resource kubernetes $(cat package-lock.json | jq --raw-output '.dependencies."@pulumi/kubernetes".version') --exact

I tried adding --cwd=/pulumi/bin in each RUN but no luck.

I exec into container with Makefile target:

.PHONY: pulumi
pulumi:
	docker run -it \
		-u 1000:1000 \
		-v $$(pwd):/pulumi/projects \
		--env-file=pulumi.env \
		$$(docker build --target=production -q .) \
		/bin/bash

Output of pulumi plugin ls

node@f63fab46fedb:/pulumi/projects$ pulumi plugin ls
NAME  KIND  VERSION  SIZE  INSTALLED  LAST USED

TOTAL plugin cache size: 0 B

Am I missing something or there is a potential issue?

[sudocovik]

Nothing wrong with Pulumi.
After finding out that Pulumi stores plugin files in the current user's home directory (node in case of docker with pulumi-nodejs image) I knew what the problem is.
Apparently the problems is with permissions (or plugin directory location). Since during docker build current user is root, plugins would install to /root/.pulumi/plugins.
Current user inside container (after docker exec) is node. Pulumi thinks install location is /home/node/.pulumi/plugins) and that location has no plugins.

Easy fix is to add USER node directive before any pulumi command.

A bit more advanced technique is to change PULUMI_HOME environment variable and then chown to node user after executing pulumi commands. This is optional solution if you have to run as root after you did some operations with pulumi; ie. apt-get.

In my case I did:

ENV PULUMI_HOME /pulumi/home
RUN mkdir ${PULUMI_HOME}

# execute pulumi plugin install commands...

RUN chown -R node:node ${PULUMI_HOME}