#!/usr/bin/env bash

set -ex

# Add the httpg patch
# Set the nginx spec file with the httpg patch
PATCH_NAME="nginx-httpg_no_delegation.patch"
SPEC_FILE="${HOME}/rpmbuild/SPECS/nginx.spec"
if grep --extended-regexp --quiet "^Patch.*: $PATCH_NAME" "$SPEC_FILE"; then
  >&2 echo "The patch $PATCH_NAME is already included in the spec file $SPEC_FILE"
  exit 0
fi
# Copy the patch in the rpmbuild directory
cp ${CI_PROJECT_DIR}/${PATCH_NAME} ~/rpmbuild/SOURCES/
pushd ~/rpmbuild/SOURCES/
# Find the highest existing Patch number in the spec file
LAST_PATCH_NUM=$(grep -oP "^Patch\K[0-9]+" $SPEC_FILE | sort -n | tail -1)
if [ -z "$LAST_PATCH_NUM" ]; then
  # There are no existing patches: find the highest Source number in the spec file
  LAST_SOURCE_NUM=$(grep -oP "^Source\K[0-9]+" $SPEC_FILE | sort -n | tail -1)
  # Add the patch to the spec file after the last Source
  sed -i.backup "/^Source${LAST_SOURCE_NUM}/a Patch0: ${PATCH_NAME}" "${SPEC_FILE}"
else
  # Add the new patch to the spec file after the last Patch
  sed -i.backup "/^Patch${LAST_PATCH_NUM}/a Patch$((LAST_PATCH_NUM + 1)): ${PATCH_NAME}" "${SPEC_FILE}"
fi
# Add httpg to release
sed -i '/%define base_release/ s/ngx/httpg/' "${SPEC_FILE}"

diff "${SPEC_FILE}.backup" "${SPEC_FILE}" || true

popd