Vercel Ignored Build Step Diff Branch Against Master/Main

script.sh

# Vercel only performs a depth=2 shallow repository clone, which makes performing branch-level diffs against your main branch
# impossible without manually fetching more data from git
#
# The following command checks if the origin remote is already set up and fetches it if not, then it performs a diff
# of the current branch being built against `main` (replace with `master` if your project is legacy)
#
# The bang (!) before `git diff` inverts the result because Vercel expects an exit code of 1 for triggering a new build
#
# Finally, if you want to filter the file list for only certain directory or file changes, you can add something like
# this after the `git diff ...` statement:
# git diff --name-only origin/main...origin/$VERCEL_GIT_COMMIT_REF | grep -E 'stacks/web'
git config remote.origin.url >&- || git remote add -f origin https://[yourAccessToken]@github.com/[yourRepositoryURL]; \
! git diff --name-only origin/main...origin/$VERCEL_GIT_COMMIT_REF