Library not loaded libgmp.10.dylib on self-hosted macos M1

[m2hd1]

using: self-hosted macOS (M1 chip)

- name: Install ruby
  uses: ruby/setup-ruby@v1
  env:
    ImageOS: macos1015

1st libgmp.10.dylib error:

The installation failed on "Print Ruby version" step with the error below:

Reason: tried: '/usr/local/opt/gmp/lib/libgmp.10.dylib' (no such file), '/usr/local/lib/libgmp.10.dylib' (no such file), '/usr/lib/libgmp.10.dylib' (no such file)

I have gmp installed with homebrew and hence the libgmp.10.dylib is located under /opt/homebrew/Cellar/gmp/6.2.1_1/lib/libgmp.10.dylib

2nd libgmp.10.dylib error

I manually installed gmp to ensure /usr/local/lib/libgmp.10.dylib will be available

but then, got a new error:

'/usr/local/lib/libgmp.10.dylib' (mach-o file, but is an incompatible architecture (have 'arm64', need 'x86_64')),

[arelstone]

I am facing the same issue.

I want to be able to make an internal release of our ios app when merging to the develop branch. We've acquired a MacMini M1 (2020) that I will be using as a self hosted runner.

I've created a user runner which has admin rights.

rvm is installed and the correct version of ruby (2.7.4) has been installed too.

% su - runner

% rvm list
=* ruby-2.7.4 [ arm64 ]

# => - current
# =* - current && default
#  * - default

% ruby --version
ruby 2.7.4p191 (2021-07-07 revision a21a3b7d23) [arm64-darwin21]

The runner is working and I can see that it picks up the jobs as it should.

The workflow:

name: Deploy internal release
on:
  workflow_dispatch:

jobs:
  setup:
    name: IOS Internal Release
    runs-on: self-hosted
    steps:
      - uses: actions/checkout@v3
      - name: whoami
        run: |
          whoami
          ruby --version
      
      - name: Setup Ruby
        uses: ruby/setup-ruby@v1
        with:
          bundler-cache: true
        env:
          ImageOS: macos12

Output from workflow:

2022-05-19T08:11:37.8828760Z Requested labels: self-hosted
2022-05-19T08:11:37.8828872Z Job defined at: paralenz/mobile/.github/workflows/deploy-internal-release.yml@refs/heads/develop
2022-05-19T08:11:37.8828897Z Waiting for a runner to pick up this job...
2022-05-19T08:11:38.5908649Z Job is about to start running on the runner: Lukes-Mac-mini (repository)
2022-05-19T08:11:44.7688010Z Current runner version: '2.291.1'
2022-05-19T08:11:44.7727160Z Runner name: 'Lukes-Mac-mini'
2022-05-19T08:11:44.7728600Z Runner group name: 'Default'
2022-05-19T08:11:44.7732000Z Machine name: 'Lukes-Mac-mini'
2022-05-19T08:11:44.7735920Z ##[group]GITHUB_TOKEN Permissions
2022-05-19T08:11:44.7737840Z Actions: write
2022-05-19T08:11:44.7738080Z Checks: write
2022-05-19T08:11:44.7738230Z Contents: write
2022-05-19T08:11:44.7738400Z Deployments: write
2022-05-19T08:11:44.7738560Z Discussions: write
2022-05-19T08:11:44.7738710Z Issues: write
2022-05-19T08:11:44.7738850Z Metadata: read
2022-05-19T08:11:44.7739000Z Packages: write
2022-05-19T08:11:44.7739150Z Pages: write
2022-05-19T08:11:44.7739300Z PullRequests: write
2022-05-19T08:11:44.7739500Z RepositoryProjects: write
2022-05-19T08:11:44.7739690Z SecurityEvents: write
2022-05-19T08:11:44.7739850Z Statuses: write
2022-05-19T08:11:44.7740000Z ##[endgroup]
2022-05-19T08:11:44.7745180Z Secret source: Actions
2022-05-19T08:11:44.7747240Z Prepare workflow directory
2022-05-19T08:11:44.9014490Z Prepare all required actions
2022-05-19T08:11:44.9153540Z Getting action download info
2022-05-19T08:11:45.2843280Z Download action repository 'actions/checkout@v3' (SHA:2541b1294d2704b0964813337f33b291d3f8596b)
2022-05-19T08:11:46.2841430Z Download action repository 'ruby/setup-ruby@v1' (SHA:8029ebd6e5bd8f4e0d6f7623ea76a01ec5b1010d)
2022-05-19T08:11:47.1503640Z Download action repository 'actions/cache@v2' (SHA:937d24475381cd9c75ae6db12cb4e79714b926ed)
2022-05-19T08:11:48.2965500Z ##[group]Run actions/checkout@v3
2022-05-19T08:11:48.2966230Z with:
2022-05-19T08:11:48.2967730Z   token: ***
2022-05-19T08:11:48.2968060Z   repository: paralenz/mobile
2022-05-19T08:11:48.2968280Z   ssh-strict: true
2022-05-19T08:11:48.2968500Z   persist-credentials: true
2022-05-19T08:11:48.2968720Z   clean: true
2022-05-19T08:11:48.2968950Z   fetch-depth: 1
2022-05-19T08:11:48.2969130Z   lfs: false
2022-05-19T08:11:48.2969330Z   submodules: false
2022-05-19T08:11:48.2969560Z   set-safe-directory: true
2022-05-19T08:11:48.2969790Z ##[endgroup]
2022-05-19T08:11:48.5832650Z Syncing repository: paralenz/mobile
2022-05-19T08:11:48.5838760Z ##[group]Getting Git version info
2022-05-19T08:11:48.5840140Z Working directory is '/Users/runner/actions-runner/_work/mobile/mobile'
2022-05-19T08:11:48.5840800Z [command]/usr/bin/git version
2022-05-19T08:11:48.5912140Z git version 2.32.1 (Apple Git-133)
2022-05-19T08:11:48.5955620Z ##[endgroup]
2022-05-19T08:11:48.6041040Z Temporarily overriding HOME='/Users/runner/actions-runner/_work/_temp/46a25e61-c4b8-487c-abe0-eca67a4ab2ba' before making global git config changes
2022-05-19T08:11:48.6044420Z Adding repository directory to the temporary git global config as a safe directory
2022-05-19T08:11:48.6053250Z [command]/usr/bin/git config --global --add safe.directory /Users/runner/actions-runner/_work/mobile/mobile
2022-05-19T08:11:48.6347630Z [command]/usr/bin/git config --local --get remote.origin.url
2022-05-19T08:11:48.6508250Z https://github.com/paralenz/mobile
2022-05-19T08:11:48.6652950Z ##[group]Removing previously created refs, to avoid conflicts
2022-05-19T08:11:48.6654230Z [command]/usr/bin/git rev-parse --symbolic-full-name --verify --quiet HEAD
2022-05-19T08:11:48.6752450Z refs/heads/develop
2022-05-19T08:11:48.6753430Z [command]/usr/bin/git checkout --detach
2022-05-19T08:11:48.7125240Z HEAD is now at 01bcc01 👷 Check ruby version
2022-05-19T08:11:48.7155050Z [command]/usr/bin/git rev-parse --symbolic-full-name --branches
2022-05-19T08:11:48.7299060Z refs/heads/develop
2022-05-19T08:11:48.7321590Z [command]/usr/bin/git branch --delete --force develop
2022-05-19T08:11:48.7476640Z Deleted branch develop (was 01bcc01).
2022-05-19T08:11:48.7524430Z [command]/usr/bin/git rev-parse --symbolic-full-name --remotes=origin
2022-05-19T08:11:48.7669990Z refs/remotes/origin/develop
2022-05-19T08:11:48.7692780Z ##[endgroup]
2022-05-19T08:11:48.7693330Z ##[group]Cleaning the repository
2022-05-19T08:11:48.7694040Z [command]/usr/bin/git clean -ffdx
2022-05-19T08:11:48.7977100Z [command]/usr/bin/git reset --hard HEAD
2022-05-19T08:11:48.8221630Z HEAD is now at 01bcc01 👷 Check ruby version
2022-05-19T08:11:48.8246460Z ##[endgroup]
2022-05-19T08:11:48.8251740Z ##[group]Disabling automatic garbage collection
2022-05-19T08:11:48.8261570Z [command]/usr/bin/git config --local gc.auto 0
2022-05-19T08:11:48.8441070Z ##[endgroup]
2022-05-19T08:11:48.8464420Z ##[group]Setting up auth
2022-05-19T08:11:48.8564700Z [command]/usr/bin/git config --local --name-only --get-regexp core\.sshCommand
2022-05-19T08:11:48.8650310Z [command]/usr/bin/git submodule foreach --recursive git config --local --name-only --get-regexp 'core\.sshCommand' && git config --local --unset-all 'core.sshCommand' || :
2022-05-19T08:11:49.0084530Z [command]/usr/bin/git config --local --name-only --get-regexp http\.https\:\/\/github\.com\/\.extraheader
2022-05-19T08:11:49.0252560Z [command]/usr/bin/git submodule foreach --recursive git config --local --name-only --get-regexp 'http\.https\:\/\/github\.com\/\.extraheader' && git config --local --unset-all 'http.https://github.com/.extraheader' || :
2022-05-19T08:11:49.1572070Z [command]/usr/bin/git config --local http.https://github.com/.extraheader AUTHORIZATION: basic ***
2022-05-19T08:11:49.1758210Z ##[endgroup]
2022-05-19T08:11:49.1758890Z ##[group]Fetching the repository
2022-05-19T08:11:49.1772920Z [command]/usr/bin/git -c protocol.version=2 fetch --no-tags --prune --progress --no-recurse-submodules --depth=1 origin +01bcc0172e56d0306cee2485911dcb45d697088b:refs/remotes/origin/develop
2022-05-19T08:11:49.7505510Z remote: Total 0 (delta 0), reused 0 (delta 0), pack-reused 0        
2022-05-19T08:11:49.8090580Z ##[endgroup]
2022-05-19T08:11:49.8091700Z ##[group]Determining the checkout info
2022-05-19T08:11:49.8093740Z ##[endgroup]
2022-05-19T08:11:49.8094970Z ##[group]Checking out the ref
2022-05-19T08:11:49.8105210Z [command]/usr/bin/git checkout --progress --force -B develop refs/remotes/origin/develop
2022-05-19T08:11:49.8359420Z Switched to a new branch 'develop'
2022-05-19T08:11:49.8368960Z Branch 'develop' set up to track remote branch 'develop' from 'origin'.
2022-05-19T08:11:49.8380020Z ##[endgroup]
2022-05-19T08:11:49.8591780Z [command]/usr/bin/git log -1 --format='%H'
2022-05-19T08:11:49.8740880Z '01bcc0172e56d0306cee2485911dcb45d697088b'
2022-05-19T08:11:49.9330060Z ##[group]Run whoami
2022-05-19T08:11:49.9333870Z [36;1mwhoami[0m
2022-05-19T08:11:49.9344080Z [36;1mruby --version[0m
2022-05-19T08:11:49.9381830Z shell: /bin/bash -e {0}
2022-05-19T08:11:49.9382030Z ##[endgroup]
2022-05-19T08:11:49.9790860Z runner
2022-05-19T08:11:49.9911820Z ruby 2.7.4p191 (2021-07-07 revision a21a3b7d23) [arm64-darwin21]
2022-05-19T08:11:50.0050700Z ##[group]Run ruby/setup-ruby@v1
2022-05-19T08:11:50.0050980Z with:
2022-05-19T08:11:50.0051210Z   bundler-cache: true
2022-05-19T08:11:50.0051430Z   ruby-version: default
2022-05-19T08:11:50.0051690Z env:
2022-05-19T08:11:50.0051900Z   ImageOS: macos12
2022-05-19T08:11:50.0052120Z ##[endgroup]
2022-05-19T08:11:50.1472090Z Using 2.7.4 as input from file .ruby-version
2022-05-19T08:11:50.1515210Z ##[group]Modifying PATH
2022-05-19T08:11:50.1515560Z Entries removed from PATH to avoid conflicts with default Ruby:
2022-05-19T08:11:50.1515990Z   /Users/runner/.rvm/gems/ruby-2.7.4/bin
2022-05-19T08:11:50.1516330Z   /Users/runner/.rvm/gems/ruby-2.7.4@global/bin
2022-05-19T08:11:50.1519320Z   /Users/runner/.rvm/rubies/ruby-2.7.4/bin
2022-05-19T08:11:50.1523520Z Entries added to PATH to use selected Ruby:
2022-05-19T08:11:50.1523830Z   /Users/runner/hostedtoolcache/Ruby/2.7.4/x64/bin
2022-05-19T08:11:50.1524310Z ##[endgroup]
2022-05-19T08:11:50.4828080Z ##[group]Downloading Ruby
2022-05-19T08:11:50.4829940Z https://github.com/ruby/ruby-builder/releases/download/toolcache/ruby-2.7.4-macos-latest.tar.gz
2022-05-19T08:11:51.6569860Z Took   1.17 seconds
2022-05-19T08:11:51.6571370Z ##[endgroup]
2022-05-19T08:11:51.6572160Z ##[group]Extracting  Ruby
2022-05-19T08:11:51.6636920Z [command]/usr/bin/tar -xz -C /Users/runner/hostedtoolcache/Ruby/2.7.4 -f /Users/runner/actions-runner/_work/_temp/4da5bbc2-83bd-4d72-96e9-0d7d4ef7e21f
2022-05-19T08:11:52.4941700Z Took   0.84 seconds
2022-05-19T08:11:52.4963560Z ##[endgroup]
2022-05-19T08:11:52.4985990Z ##[group]Print Ruby version
2022-05-19T08:11:52.4992850Z [command]/Users/runner/hostedtoolcache/Ruby/2.7.4/x64/bin/ruby --version
2022-05-19T08:11:53.0548850Z dyld[96266]: Library not loaded: /usr/local/opt/gmp/lib/libgmp.10.dylib
2022-05-19T08:11:53.0551290Z   Referenced from: /Users/runner/hostedtoolcache/Ruby/2.7.4/x64/bin/ruby
2022-05-19T08:11:53.0552190Z   Reason: tried: '/usr/local/opt/gmp/lib/libgmp.10.dylib' (no such file), '/usr/local/lib/libgmp.10.dylib' (no such file), '/usr/lib/libgmp.10.dylib' (no such file)
2022-05-19T08:11:53.0562070Z Took   0.56 seconds
2022-05-19T08:11:53.0564740Z ##[endgroup]
2022-05-19T08:11:53.0641230Z ##[error]Error: The process '/Users/runner/hostedtoolcache/Ruby/2.7.4/x64/bin/ruby' failed with exit code null
    at ExecState._setResult (/Users/runner/actions-runner/_work/_actions/ruby/setup-ruby/v1/dist/index.js:4918:25)
    at ExecState.CheckComplete (/Users/runner/actions-runner/_work/_actions/ruby/setup-ruby/v1/dist/index.js:4901:18)
    at ChildProcess.<anonymous> (/Users/runner/actions-runner/_work/_actions/ruby/setup-ruby/v1/dist/index.js:4795:27)
    at ChildProcess.emit (node:events:390:28)
    at maybeClose (node:internal/child_process:1064:16)
    at Socket.<anonymous> (node:internal/child_process:450:11)
    at Socket.emit (node:events:390:28)
    at Pipe.<anonymous> (node:net:687:12)
2022-05-19T08:11:53.0830400Z Post job cleanup.
2022-05-19T08:11:53.2066930Z [command]/usr/bin/git version
2022-05-19T08:11:53.2222700Z git version 2.32.1 (Apple Git-133)
2022-05-19T08:11:53.2274780Z Temporarily overriding HOME='/Users/runner/actions-runner/_work/_temp/726f074d-a979-45cc-a938-d65c0780bab5' before making global git config changes
2022-05-19T08:11:53.2279400Z Adding repository directory to the temporary git global config as a safe directory
2022-05-19T08:11:53.2284300Z [command]/usr/bin/git config --global --add safe.directory /Users/runner/actions-runner/_work/mobile/mobile
2022-05-19T08:11:53.2443720Z [command]/usr/bin/git config --local --name-only --get-regexp core\.sshCommand
2022-05-19T08:11:53.2618550Z [command]/usr/bin/git submodule foreach --recursive git config --local --name-only --get-regexp 'core\.sshCommand' && git config --local --unset-all 'core.sshCommand' || :
2022-05-19T08:11:53.4075460Z [command]/usr/bin/git config --local --name-only --get-regexp http\.https\:\/\/github\.com\/\.extraheader
2022-05-19T08:11:53.4221290Z http.https://github.com/.extraheader
2022-05-19T08:11:53.4253010Z [command]/usr/bin/git config --local --unset-all http.https://github.com/.extraheader
2022-05-19T08:11:53.4409470Z [command]/usr/bin/git submodule foreach --recursive git config --local --name-only --get-regexp 'http\.https\:\/\/github\.com\/\.extraheader' && git config --local --unset-all 'http.https://github.com/.extraheader' || :
2022-05-19T08:11:53.6086220Z Uploading runner diagnostic logs
2022-05-19T08:11:53.6403230Z Completed runner diagnostic log upload
2022-05-19T08:11:53.6403540Z Cleaning up orphan processes

[eregon]

Short answer: this action and the the built Rubies do not support any other architecture than x86_64. We should probably update it to error early in that case.

It might still work on M1 if Rosetta 2 is installed though, but then you need to make sure the exact same dependencies are installed as on GitHub action, and specifically here a x86_64 /usr/local/opt/gmp/lib/libgmp.10.dylib.

[m2hd1]

bummer, thanks @eregon

any plan to support M1 in the near future ?

[eregon]

any plan to support M1 in the near future ?

We'd need M1 GitHub-hosted runners for that, so I can build the releases. Until then, no, but it might work if installing Rosetta 2 and the needed dependencies with amd64 Homebrew. I might consider adding a way to build your own ruby and use it with setup-ruby, but that seems a separate issue somewhat.

According to https://tenderlovemaking.com/2022/01/07/homebrew-rosetta-and-ruby.html, /usr/local should be amd64 Homebrew, and so /usr/local/lib/libgmp.10.dylib should be amd64 but it seems aarch64 in your case. So I guess you manually copied /opt/homebrew/Cellar/gmp/6.2.1_1/lib/libgmp.10.dylib to /usr/local/lib/libgmp.10.dylib, which is pretty wrong, do not mix architectures like that please.

To run under Rosetta you should install amd64 Homebrew (as explained in the blog post) and install gmp in amd64 Homebrew.

[m2hd1]

@eregon thanks for the reply and the workaround !

We'd need M1 GitHub-hosted runners for that, so I can build the releases.

oh I see, bummer it can't be built from the runners you have :(

So I guess you manually copied /opt/homebrew/Cellar/gmp/6.2.1_1/lib/libgmp.10.dylib to /usr/local/lib/libgmp.10.dylib,

no, I uninstalled the homebrew ruby and then built and installed ruby from the source probably I can try building an x86/x64 build and see if that helps ...

[kuhnroyal]

any plan to support M1 in the near future ?

We'd need M1 GitHub-hosted runners for that, so I can build the releases. Until then, no, but it might work if installing Rosetta 2 and the needed dependencies with amd64 Homebrew. I might consider adding a way to build your own ruby and use it with setup-ruby, but that seems a separate issue somewhat.

According to https://tenderlovemaking.com/2022/01/07/homebrew-rosetta-and-ruby.html, /usr/local should be amd64 Homebrew, and so /usr/local/lib/libgmp.10.dylib should be amd64 but it seems aarch64 in your case. So I guess you manually copied /opt/homebrew/Cellar/gmp/6.2.1_1/lib/libgmp.10.dylib to /usr/local/lib/libgmp.10.dylib, which is pretty wrong, do not mix architectures like that please.

To run under Rosetta you should install amd64 Homebrew (as explained in the blog post) and install gmp in amd64 Homebrew.

This is no exactly correct. There are 3 different homebrew folders:

/usr/local/opt - x86 on x86 devices /usr/local/homebrew/opt - x86 on arm64 devices /opt/homebrew - arm65 on arm64 devices

Anyways, I now have the action working on M1. You can follow https://medium.com/mkdir-awesome/how-to-install-x86-64-homebrew-packages-on-apple-m1-macbook-54ba295230f to install brew for x86 and enable Rosetta.

Afterwards use the new brew to install the required packages arch -x86_64 /usr/local/homebrew/bin/brew install gmp libyaml rvm (or use your alias). These are installed into /usr/local/homebrew/opt. But this folder is not checked when ruby is looking for the libraries. So just create a symbolic link sudo ln -s /usr/local/homebrew/opt /usr/local/opt and you are done.

[rgaufman]

I already have ruby working on M1, I do not have rosetta and trying to avoid it as specs run much slower. Any solution to this? - I like the idea of being able to just use my existing working ruby.

[eregon]

@rgaufman This needs better docs, but this should already work if you build your own ruby in the hosted tool cache and create the "complete" file: https://github.com/ruby/setup-ruby/blob/6148f408d35df04b0189be5e64c1458377b8ae13/common.js#L165-L186 That's the overall approach of GitHub Actions for self-hosted runners and the hosted tool cache.

[rgaufman]

@eregon Ah, interesting, so if I for example just create a symlink to the ruby and bundle binaries in /Users/runner/hostedtoolcache/bin/ - that should just work?

[eregon]

I'm not entirely sure a symlink is accepted (depends on https://github.com/actions/toolkit/tree/main/packages/tool-cache), but it's worth a try.

[rgaufman]

I ended up just commenting out ruby-setup and adding the path to my ruby. Not a perfect solution but a good enough workaround as we standardise on a single Ruby version across the code bases, hope this is useful for someone:

name: "Ruby on Rails CI"
on: [push, pull_request]
jobs:
  test:
    runs-on: self-hosted
    env:
      RAILS_ENV: test
    steps:
      - uses: actions/checkout@v3

      # - name: Install Ruby and gems
      #   uses: ruby/setup-ruby@v1
      #   with:
      #     bundler-cache: true

      - run: echo /usr/local/opt/ruby/bin >> $GITHUB_PATH
      - run: cp config/secrets.yml.sample config/secrets.yml
      - run: bundle install --quiet
      - run: bundle exec rails db:prepare
      - run: bundle exec rspec

[Shahaed]

I'm not entirely sure a symlink is accepted (depends on https://github.com/actions/toolkit/tree/main/packages/tool-cache), but it's worth a try.

It won't. The tool checks the .../actions-runner/_work/_tool/Ruby/{version}/{os_architecture} for existing cache and if it doesn't exist this action will download a new on into the hostedtoolcache folder and overwrite whatever is there.

Since Github Actions supports M1 self hosted runners it would be nice for this action to have the MacOS arm builds. However automating that is obviously hard since Github doesn't have any MacOS arm runners.

[Shahaed]

For anyone that wants to keep using this action and also use the ARM build of Ruby here's a python script that you can run before each job (How to run script on self hosted runners).

It will link all homebrew installs to the tools cache. Script doesn't handle older version (i.e. [email protected]) but can easily be modified to do that.

https://gist.github.com/Shahaed/a37c62bd89bf85c649fc0e72fd4d6d94

[eregon]

It won't.

I'm confused, it seems to work given it works with your script which does use symlinks, right?

[magnussp]

For anyone that wants to keep using this action and also use the ARM build of Ruby here's a python script that you can run before each job (How to run script on self hosted runners).

It will link all homebrew installs to the tools cache. Script doesn't handle older version (i.e. [email protected]) but can easily be modified to do that.

https://gist.github.com/Shahaed/a37c62bd89bf85c649fc0e72fd4d6d94

@Shahaed in which dir are you expecting your script to be placed to work?

[magnussp]

After some more headache with this problem I don't think @Shahaed python script will solve the issue for me. I already have an arm64 built binary of Ruby installed on the machine via rbenv. The python script only seem to care about homebrew installs.

So my solution was to create a symlinks in /Users/runner/hostedtoolcache to the rbenv install of Ruby similar to how @Shahaed python script does for homebrew installed Cellars.

Then I have a script that is run before runner jobs that will execute ln -fs /Users/runner/hostedtoolcache/Ruby /Users/runner/actions-runner/_work/_tool

So in short

# create symlinks in hostedtoolcache to rbenv install
ln -s /Users/runner/.rbenv/versions/3.1.2 /Users/runner/hostedtoolcache/Ruby/3.1.2/arm64
ln -s /Users/runner/.rbenv/versions/3.1.2 /Users/runner/hostedtoolcache/Ruby/3.1.2/x86
ln -s /Users/runner/.rbenv/versions/3.1.2 /Users/runner/hostedtoolcache/Ruby/3.1.2/x64
touch /Users/runner/hostedtoolcache/Ruby/3.1.2/arm64.complete
touch /Users/runner/hostedtoolcache/Ruby/3.1.2/x86.complete
touch /Users/runner/hostedtoolcache/Ruby/3.1.2/x64.complete

# have a script run at job startup by the github runner that runs the following command
ln -fs /Users/runner/hostedtoolcache/Ruby /Users/runner/actions-runner/_work/_tool

This can be a temporary solution for those with rbenv ruby until this action, setup-ruby, have solved arm64 macos builds that are pulled down by the action.

[Shahaed]

After some more headache with this problem I don't think @Shahaed python script will solve the issue for me. I already have an arm64 built binary of Ruby installed on the machine via rbenv. The python script only seem to care about homebrew installs.

Yup @magnussp, I did the bare minimum to make the actions run on the mac mini and installed all dependencies with Brew. Since we're only doing iOS development having multiple version of Ruby with rbenv (etc) wasn't a big deal.

I like your solution of also filling the hostedtoolcache folder as well and then symlinking from there. Might help other setup-xxx actions. Depends on how they're written I assume.

[akarabach]

Any updates on it ?

[eregon]

Nothing we can do until GitHub has GitHub-hosted darwin-aarch64 runners.

[eregon]

With https://github.com/ruby/setup-ruby/pull/473 this action now gives instructions for how to make it work for self-hosted runners not matching a GitHub-hosted runner image.