fix: install arm brew on MacOS Arm to install libsodium

.github/workflows/CI.yml

@@ -106,11 +106,18 @@ jobs:
           architecture: ${{ matrix.node_arch }}
           cache: "pnpm"
 
-      - name: Install Mac-OS Dependencies
-        if: contains(matrix.os, 'macos')
+      - name: Install Mac-OS ${{ matrix.ARCH }} Dependencies
+        if: ${{ contains(matrix.os, 'macos') && matrix.ARCH == 'x86_64' }}
         run: |
           brew install libsodium gnutls
 
+      - name: Install Mac-OS ${{ matrix.ARCH }} Dependencies
+        if: ${{ contains(matrix.os, 'macos') && matrix.ARCH == 'arm64' }}
+        run: |
+          brew uninstall libsodium --force --ignore-dependencies
+          chmod +x ./script/macos-arm-deps.sh
+          ./script/macos-arm-deps.sh
+
       - name: Install Dependencies and Build
         if: ${{ !matrix.docker }}
         run: pnpm install

script/macos-arm-deps.sh

@@ -0,0 +1,34 @@
+#!/bin/sh
+set -e
+
+#! Install arm-brew on x86 MacOS Arm
+#! Based on https://github.com/Homebrew/discussions/discussions/2843#discussioncomment-2243610
+
+bottle_tag="arm64_big_sur" # Macos 11 is big sure
+dependencies="libsodium gnutls"
+
+mkdir -p ~/arm-target/bin
+mkdir -p ~/arm-target/brew-cache
+export PATH="$HOME/arm-target/bin:$PATH"
+
+PREV_PWD="$PWD"
+cd ~/arm-target
+
+mkdir arm-homebrew
+curl -L https://github.com/Homebrew/brew/tarball/master | tar xz --strip 1 -C arm-homebrew
+ln -s ~/arm-target/arm-homebrew/bin/brew ~/arm-target/bin/arm-brew
+
+export HOMEBREW_CACHE=~/arm-target/brew-cache
+export HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK=1
+
+arm-brew fetch --deps --bottle-tag=$bottle_tag $dependencies |
+    grep -E "(Downloaded to:|Already downloaded:)" |
+    grep -v pkg-config |
+    awk '{ print $3 }' |
+    xargs -n 1 arm-brew install --ignore-dependencies --force-bottle
+
+# Install host version of pkg-config so we can call it in the build system
+arm-brew install pkg-config
+ln -s ~/arm-target/arm-homebrew/bin/pkg-config ~/arm-target/bin/arm-pkg-config
+
+cd "$PREV_PWD"