feat: add 'set up homebrew' step publish.yaml

Author: jsjoeio

.github/workflows/publish.yaml

@@ -42,6 +42,13 @@ jobs:
     needs: npm
     runs-on: macos-latest
     steps:
+      # Ensure things are up to date
+      # Suggested by homebrew maintainers
+      # https://github.com/Homebrew/discussions/discussions/1532#discussioncomment-782633
+      - name: Set up Homebrew
+        id: set-up-homebrew
+        uses: Homebrew/actions/setup-homebrew@master
+
       - uses: actions/checkout@v2
       - name: Configure git
         run: |

ci/steps/brew-bump.sh

@@ -29,6 +29,10 @@ main() {
   # Source: https://serverfault.com/a/912788
   # shellcheck disable=SC2016,SC2028
   echo '#!/bin/sh\nexec echo "$HOMEBREW_GITHUB_API_TOKEN"' >"$HOME"/.git-askpass.sh
+  # Ensure it's executable since we just created it
+  chmod +x "$HOME/.git-askpass.sh"
+  # GIT_ASKPASS lets us use the password when pushing without revealing it in the process list
+  # See: https://serverfault.com/a/912788
   GIT_ASKPASS="$HOME/.git-askpass.sh" git push https://cdrci@github.com/cdrci/homebrew-core.git --all
 
   # Find the docs for bump-formula-pr here