Add Homebrew reset step in build workflow

Reset Homebrew to a pristine state, cleaning up taps and local modifications, and performing a sanity check.

Author: zenfty

.github/workflows/build.yml

@@ -34,20 +34,28 @@ jobs:
       - name: Use Xcode 15
         run: sudo xcode-select -switch /Applications/Xcode_15.2.app/Contents/Developer
 
-      - name: debug data
+      - name: Reset Homebrew to pristine state
         run: |
-          echo "understanding why jws is silly"
-          grep -r "formula.jws.json" $(brew --repo)
-          brew tap
-          echo complete understanding
-
+          # remove unnecessary taps
+          brew untap homebrew/cask 2>/dev/null || true
+          brew untap homebrew/core 2>/dev/null || true
+      
+          # stash and clean any local modifications in core and cask
+          git -C "$(brew --repo homebrew/core)" stash -u || true
+          git -C "$(brew --repo homebrew/core)" clean -d -f || true
+          git -C "$(brew --repo homebrew/cask)" stash -u || true
+          git -C "$(brew --repo homebrew/cask)" clean -d -f || true
+      
+          # fully reset Homebrew metadata
+          brew update-reset
+      
+          # cleanup old builds, broken symlinks, cache
+          brew cleanup -s
+          rm -rf "$(brew --cache)"/*
+      
+          # sanity check
           brew doctor
-          brew config
-
-          brew install ffmpeg@7
-          ls $(brew --prefix ffmpeg@7)
 
-
       - name: Install MacPorts
         run: |
           # install ports by defualt to /opt/local/bin