Reset and initialize Meteor DB on a git ref and start the app again afterwards

test-meteor-db-migration-against-ref.sh

#!/bin/bash
set -e

#################################################
if [[ $# -ne 1 ]]; then
  echo "This script:"
  echo "1. resets and initializes the DB on the specified commit/branch"
  echo "2. goes back to the codebase you ran this script from"
  echo "3. runs the app again"
  echo
  echo "Usage:"
  echo "test-migration-against-ref.sh <ref>"
  echo "  ref - branch or commit sha that we reset the DB on"
  echo
  echo "Example:"
  echo "  test-migration-against-ref.sh master"
  exit 0
fi
#################################################

WAIT_STRING="Started your app"

GIT_POS=$(git rev-parse --abbrev-ref HEAD)

DID_STASH=false
if ! git diff-index --quiet HEAD --; then
  echo -e "[-] Stashing uncommitted changes"
  git stash save --include-untracked "test-migration starting point"
  DID_STASH=true
fi

if [[ -z $1 ]]; then
  echo -e "\n[-] First argument should be a ref (branch name / commit sha) that I should revert to for resetting the DB." >&2
  exit 1
fi
echo -e "\n[-] Reverting to $1"
git checkout $1

echo -e "\n[-] Resetting DB"
meteor reset

echo -e "\n[-] Running app to set up initial DB"
# run and wait for WAIT_STRING
# https://superuser.com/a/1302819
{ meteor run --once --settings=settings/development.json & echo $! > test-migration-run.pid; } \
  | tee test-migration-run1.log \
  | { grep -m1 "$WAIT_STRING" && kill -9 "$(cat test-migration-run.pid)" && rm test-migration-run.pid ; }

echo -e "\n[-] Going again to $GIT_POS (position before running this script)"
git checkout "$GIT_POS"

if $DID_STASH; then
  echo -e "\n[-] Re-applying stashed changes"
  git stash pop stash@{0}
fi

echo -e "\n[-] Running app again (to check migration)"
# run and wait for WAIT_STRING
{ meteor run --once --settings=settings/development.json & echo $! > test-migration-run.pid; } \
  | tee test-migration-run2.log \
  | { grep -m1 "Server startup complete!" && kill -9 "$(cat test-migration-run.pid)" && rm test-migration-run.pid ; }

less -R +G test-migration-run2.log
rm test-migration-run*.log