#!/bin/sh
# Keep the committed OpenAPI spec in sync with the API router: regenerate it
# and abort the push when the regenerated file would change, so the spec can
# never go stale. Only runs when API source files changed, to avoid slowing
# down pushes that don't touch the API. Compare against both the working tree
# and the index so the check passes only after the file is actually committed.

# Determine which commits are being pushed: compare local HEAD against the
# upstream branch if set, otherwise just the previous commit.
if git rev-parse --verify @{upstream} >/dev/null 2>&1; then
  RANGE="@{upstream}...HEAD"
else
  RANGE="HEAD~1..HEAD"
fi

if git diff --name-only "$RANGE" -- src/server/api/ | grep -q .; then
  pnpm gen:openapi
  if [ -n "$(git status --porcelain -- src/server/api/openapi.generated.json)" ]; then
    echo "✖ src/server/api/openapi.generated.json is out of date."
    echo "  Run: pnpm gen:openapi && git add src/server/api/openapi.generated.json && git commit"
    exit 1
  fi
fi