Homebrew for Linux ARM

[!CAUTION] This Fork Since this is an unsupported hack, this may eventually break.

How to use

All this fork does is hack to allow ruby installed by rbenv to be used instead of /usr/bin/ruby: GitHub commit - Allow ruby from rbenv to take precedence:

# filter the user environment
PATH="/usr/bin:/bin:/usr/sbin:/sbin"
PATH="${HOME}/.rbenv/shims:${PATH}"

#FILTERED_ENV=()
FILTERED_ENV=("RBENV_VERSION=${RBENV_VERSION-}")

First-time Installation

To install this Homebrew, you'll first have to install rbenv (e.g. Ubuntu 22.04's version from apt is ok):

git clone https://github.com/rbenv/ruby-build.git "$(rbenv root)"/plugins/ruby-build  # apt's ruby-build is too out of date
#sudo apt install libyaml-dev
#sudo dnf install libyaml-devel
rbenv install 3.3.6
rbenv shell 3.3.6
export HOMEBREW_BREW_GIT_REMOTE=https://github.com/huyz/brew-for-linux-arm
export HOMEBREW_DEVELOPER=1
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh | sed '532s/abort/warn/')"

You'll also need to add the core tap back (nowadays deprecated):

brew tap homebrew/core

After installation, to run brew you should probably create a brew wrapper that contains:

#!/bin/bash
[[ -d ~/.rbenv/bin ]] && export PATH="~/.rbenv/bin:$PATH"
if command -v rbenv &>/dev/null; then
  export PATH="${PATH//$(rbenv root)\/shims:/}"
  eval "$(rbenv init -)"
  rbenv shell 3.3.6
else
  echo "Warning: rbenv not found" >&2
fi
HOMEBREW_BREW_GIT_REMOTE=https://github.com/huyz/brew-for-linux-arm HOMEBREW_DEVELOPER=1 exec /home/linuxbrew/.linuxbrew/bin/brew "$@"

Upgrading ruby

Occasionally, you may get an error from brew upgrade because the ruby version required by Homebrew will be bumped upstream. To upgrade, you can do:

cd "$(rbenv root)"/plugins/ruby-build
git pull origin master
rbenv install 3.3.6

And you should update your brew wrapper that you created as above:

sed -i 's/^\([[:space:]]*rbenv shell\) .*/\1 3.3.6/' "$(which brew)"

You can then brew upgrade as usual.

Caveats

[!IMPORTANT] Partial solution Of course, this is only half the battle. Many official formulas won't work because they weren't written with Linux ARM in mind. (For example, as of 2024-07-19, the rust formula will fail to build.)

[!WARNING] I'll try to regularly rebase my changes on top of the latest upstream commits, and then I'll force push the new rebased commits. So you might need to reset --hard after fetching updates for this repo

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