Support Bun: Running Bun Install in Docker gives The Cypress App could not be downloaded

[ZachHandley]

Current behavior

Setting up a Dockerfile, when running install it fails to download Cypress and I don't quite understand why, seems like a Cypress issue

=> ERROR [install 4/8] RUN cd /temp/dev && bun install --frozen-lockfile                                                                             10.8s
------
 > [install 4/8] RUN cd /temp/dev && bun install --frozen-lockfile:
0.204 bun install v1.0.22 (b400b36c)
0.228 [21.66ms] migrated lockfile from package-lock.json
0.238  Saved lockfile
10.57 Installing Cypress (version: 12.8.1)
10.57 
10.57 [STARTED] Task without title.
10.57 [TITLE]  Downloading Cypress      0% 0s
10.57 [TITLE]  Downloading Cypress      1% 11s
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10.57 The Cypress App could not be downloaded.
10.57 
10.57 Does your workplace require a proxy to be used to access the Internet? If so, you must configure the HTTP_PROXY environment variable before downloading Cypress. Read more: https://on.cypress.io/proxy-configuration
10.57 
10.57 Otherwise, please check network connectivity and try again:
10.57 
10.57 ----------
10.57 
10.57 URL: https://download.cypress.io/desktop/12.8.1?platform=linux&arch=x64
10.57 TypeError: undefined is not an object
10.57 
10.57 ----------

Desired behavior

bun install --frozen-lockfile should install

Test code to reproduce

I'm attempting to build a Dockerfile for Invoice Ninja, and this is the relevant code

FROM oven/bun:latest as base
WORKDIR /app
# Install dependencies into temp directory
# This will cache them and speed up future builds
FROM base as install
RUN mkdir -p /temp/dev
RUN bun upgrade
COPY package.json package-lock.json /temp/dev/
# Install with dev for build
RUN cd /temp/dev && bun install --frozen-lockfile

with the following for Cypress in the package.json

"cypress": "^12.5.1",

Cypress Version

12.8.1 was attempted install

Node version

Bun 1.0.22

Operating System

Docker

Debug Logs

No response

Other

No response

[jonnalley]

came here to say that I'm seeing the same thing with the same bun version (1.0.22) as well every version back to and including 1.0.17--but in my case I tried to install newer versions of cypress as well including 13.6.0 and 13.6.2 with no success.

bun version 1.0.16 doesn't exhibit these issues with the same two cypress 13.6.x versions mentioned above.

[jonnalley]

@ZachHandley I'm wondering if this is actually a bun issue perhaps. I had success in getting past this issue with using --ignore-scripts on my bun install command in my Dockerfile. See oven-sh/bun#7689

[MikeMcC399]

@ZachHandley

• This is similar to issue npm install cypress fails with Corrupted Download #27997 where network security may be causing an issue in downloading Cypress. Edit: not relevant.

• Note that there is no mention in the Cypress documentation that Bun is a supported environment. See System requirements. There was a request for Bun support in [Feature request] Add support for Bun github-action#585 for the Cypress GitHub Action. I haven't seen any request or plan for the core Cypress product to support Bun so far.

• You may want to test installing using npm instead. If it's a network security issue then I would expect you to see the same error.

[ZachHandley]

@ZachHandley

• This is similar to issue npm install cypress fails with Corrupted Download #27997 where network security may be causing an issue in downloading Cypress.

• Note that there is no mention in the Cypress documentation that Bun is a supported environment. See System requirements. There was a request for Bun support in [Feature request] Add support for Bun github-action#585 for the Cypress GitHub Action. I haven't seen any request or plan for the core Cypress product to support Bun so far.

• You may want to test installing using npm instead. If it's a network security issue then I would expect you to see the same error.

Unfortunately not, NPM worked fine, it usually makes it to 99% before failing and it usually seems like it's right around when it would begin executing an install script, so not sure.

[ZachHandley]

But also I just want to say, I have 0 issues with any other packages using Bun so far, so support it or don't but this is almost definitely on Cypress or some weird interaction that shouldn't be happening

[MikeMcC399]

@ZachHandley

I can reproduce your error using the Bun Docker image oven/bun. This is an image based on linux-x64 (Debian - 11.8).

Running the following in the Docker container:

# bun add cypress -D --ignore-scripts
bun add v1.0.25 (a8ff7be6)

 installed cypress@13.6.3 with binaries:
  - cypress

 1 package installed [2.85s]

then:

bun add cypress -D 
export DEBUG=cypress:*
bun cypress install

showed the following debug log:

# bun cypress install
  cypress:cli:cli cli starts with arguments ["/usr/local/bin/bun","/root/cy/node_modules/.bin/cypress","install"] +0ms
  cypress:cli NODE_OPTIONS is not set +0ms
  cypress:cli:cli program parsing arguments +5ms
  cypress:cli parsed cli options {} +154ms
  cypress:cli installing with options {} +0ms
  cypress:cli detecting arch { osPlatform: 'linux', osArch: 'x64' } +2ms
  cypress:cli arm uname -m result: { stdout: 'x86_64' }  +22ms
  cypress:cli version in package.json is 13.6.3, version to install is 13.6.3 +24ms
  cypress:cli Reading binary package.json from: /root/.cache/Cypress/13.6.3/Cypress/resources/app/package.json +0ms
  cypress:cli no binary installed under cli version +20ms
  cypress:cli checking local file /13.6.3 cwd /root/cy +1ms
  cypress:cli preparing to download and unzip version  13.6.3 to path /root/.cache/Cypress/13.6.3 +0ms
Installing Cypress (version: 13.6.3)


  cypress:cli needed Cypress version: 13.6.3 +0ms
  cypress:cli source url https://download.cypress.io/desktop/13.6.3?platform=linux&arch=x64 +1ms
  cypress:cli downloading cypress.zip to "/tmp/cypress-64.zip" +0ms
  cypress:cli Downloading package {
  url: 'https://download.cypress.io/desktop/13.6.3?platform=linux&arch=x64',
  proxy: null,
  downloadDestination: '/tmp/cypress-64.zip'
} +1ms
  cypress:cli expected file size 81 +413ms
  cypress:cli redirect version: 13.6.3 +0ms
  cypress:cli redirect url: https://cdn.cypress.io/desktop/13.6.3/linux-x64/cypress.zip +0ms
  cypress:cli Downloading package {
  url: 'https://cdn.cypress.io/desktop/13.6.3/linux-x64/cypress.zip',
  proxy: null,
  downloadDestination: '/tmp/cypress-64.zip'
} +0ms
  cypress:cli expected checksum 1631654914f16e0b5b797d9e4ceae044d55fcbcca543222c721a5230c4cd4d2aaf1a16d316454e019b6e1861be19cfe3050ca5468c754ac898ec42e29fb008c4 +128ms
⠹  Downloading Cypress      100% 0s
  cypress:cli downloading finished +22s
  cypress:cli verifying checksum and file size +1ms
  cypress:cli URL: https://download.cypress.io/desktop/13.6.3?platform=linux&arch=x64
✖ The Cypress App could not be downloaded.
  Does your workplace require a proxy to be used to access the Internet? If so, you must configure the HTTP_PROXY en…
  Otherwise, please check network connectivity and try again:
  ----------
  URL: https://download.cypress.io/desktop/13.6.3?platform=linux&arch=x64
  TypeError: undefined is not an object
  ----------
  Platform: linux-x64 (Debian - 11.8)
  Cypress Version: 13.6.3
The Cypress App could not be downloaded.

Does your workplace require a proxy to be used to access the Internet? If so, you must configure the HTTP_PROXY environment variable before downloading Cypress. Read more: https://on.cypress.io/proxy-configuration

Otherwise, please check network connectivity and try again:

----------

URL: https://download.cypress.io/desktop/13.6.3?platform=linux&arch=x64
TypeError: undefined is not an object

----------

Platform: linux-x64 (Debian - 11.8)
Cypress Version: 13.6.3
error: "cypress" exited with code 1

The error is:

TypeError: undefined is not an object

I can't say what the reason for this error is. I would guess that the Docker image oven/bun is missing some prerequisite that Cypress requires. Edit: see next comment.

Cypress provides compatible Docker images on the Docker Hub under cypress.

You may have more success if you use one of these Cypress Docker images as a base and install Bun on top. I have not tried this out myself. Edit: I can successfully run Cypress 13.6.3 natively under Ubuntu 22.04 using Bun 1.0.25. I haven't been able to do this yet in Docker.

Please note that I am a community contributor not a Cypress.io employee, so I don't make statements on behalf of Cypress.io. Any statement about whether Cypress supports Bun or not would need to come from the Cypress.io team.

The Cypress installation documentation lists npm, Yarn and pnpm as installation tools. There is no mention anywhere in the Cypress documentation about using Bun and so you can assume that Cypress is not regularly tested against Bun in Cypress' CI/CD process.

[MikeMcC399]

@ZachHandley

The Docker image oven/bun does not include Node.js and this is required for a successful download of Cypress.

The documentation Installing Cypress > System requirements > Node.js implies this, although it is not specific to say that one of npm, Yarn or pnpm is required.

I can also reproduce this on Ubuntu with only Bun and no Node.js installed.

So the issue is that Cypress cannot be installed without Node.js. This would be a separate enhancement request to allow Cypress to be installed and run in a pure Bun environment with no Node.js present. It's also possible that this issue is a Bun bug, since Bun is advertised as a drop-in replacement for Node.js. Edit: The Bun / Node.js compatibility page shows multiple gaps in Bun's compatibility with Node.js.

Another enhancement request would be for Cypress Docker images to allow use with Bun.

[MikeMcC399]

I used cypress/factory to build a Docker image and run Cypress using Bun.

Dockerfile contents:

ARG NODE_VERSION='20.11.0'

FROM cypress/factory
RUN npm install bun --global

COPY . /opt/app
WORKDIR /opt/app
RUN bun add cypress -D

It is not very elegant to have to use Node.js in parallel to Bun, and to install Bun with npm. This was just to show that it is possible. There is no claim that it is an optimal solution!

docker build . -t test
docker run -it test bun cypress run

[jennifer-shehane]

Adding a note to the docs about Node.js being required: cypress-io/cypress-documentation#5615

[ZachHandley]

So my only issue with this is that Bun is meant to be a direct replacement of NPM. It quite literally works as a drop in replacement for me everywhere I go. Is there a specific thing that's causing this in Cypress? Bun has replacement features for almost everything, and it has node webserver and such built in, so can there be compatibility added? I'd be happy to peek at it.