Gitpod seems to corrupt cache

[Kreyren]

Describe the bug

As presented on Automattic/node-canvas#1582 (comment) gitpod had two similar steps cached, but it merged the caches into a one which caused a conflict

Steps to reproduce

1. Create a new repository
2. Add .gitpod.yml with content:

image:
  file: .gitpod.Dockerfile

3. Wipe relevant caches for following steps
4. Create a .gitpod.Dockerfile with content:

FROM gitpod/workspace-full

USER root

RUN true \
	&& apt-get update \
	&& apt-get install -y apt-utils \
	# https://github.com/Automattic/node-canvas/blob/master/.github/workflows/ci.yaml#L19
	&& apt-get install -y \
        	build-essential \
        	libcairo2-dev \
        	libpango1.0-dev \
        	libjpeg-dev \
        	libgif-dev \
        	librsvg2-dev

5. Run gitpod and check if npm install canvas builds successfully (it is not expected to build using libjpeg-dev)
6. Close gitpod
7. Change .gitpod.Dockerfile on

FROM gitpod/workspace-full

USER root

RUN true \
	&& apt-get update \
	&& apt-get install -y apt-utils \
	# https://github.com/Automattic/node-canvas/blob/master/.github/workflows/ci.yaml#L19
	&& apt-get install -y \
        	build-essential \
        	libcairo2-dev \
        	libpango1.0-dev \
        	libjpeg8-dev \
        	libgif-dev \
        	librsvg2-dev

8. Run gitpod on the repository and check if npm install canvas builds (expected to install with libjpeg8-dev)
9. Close gitpod
10. Change .gitpod.Dockerfile again on:

FROM gitpod/workspace-full

USER root

RUN true \
	&& apt-get update \
	&& apt-get install -y apt-utils \
	# https://github.com/Automattic/node-canvas/blob/master/.github/workflows/ci.yaml#L19
	&& apt-get install -y \
        	build-essential \
        	libcairo2-dev \
        	libpango1.0-dev \
        	libjpeg-dev \
        	libgif-dev \
        	librsvg2-dev

11. Open the commit with libjpeg8-dev in gitpod and expect it to behave as if it had libjpeg-dev

Expected behavior

Using gitpod from a branch should use be using a gitpod configuration from a specified branch. (current behavior for non-similar steps afaik)

Example repository

https://github.com/Kreyren/gitpod-1520

[stale]

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