db/scripts/diff.sh

#! /bin/bash

set -e

source ./scripts/env.sh ./.env.schema

base="$1"
head_arg="$2"
head=$(git show --format=format:%h -q | xargs)

if [[ -n "$head_arg" ]]; then
  head="$head_arg"
fi;

cd ./migrations 1>&2
git pull
cd ../ 1>&2

migration="./migrations/${base}_to_${head}.sql"

base_url=postgresql://$POSTGRES_USER:$POSTGRES_PASSWORD@localhost:5432/dnim
head_url=postgresql://$POSTGRES_USER:$POSTGRES_PASSWORD@localhost:5433/dnim

if [[ -z "$base" ]] || [ -z "$head" ]; then
  echo "revisions to diff are required ex. ./scripts/diff.sh abc bcd" 1>&2;
  exit 1;
fi

if [[ ! -f "$migration" ]]; then
  ./scripts/build.sh base "$base" 1>&2
  ./scripts/build.sh head "$head" 1>&2

  until (pg_isready -p 5432 && pg_isready -p 5433) 1>/dev/null; do true; done;

  migra --unsafe "$base_url" "$head_url" > "$migration" \
    || echo "migra exited with code $?. this is /probably/ fine" 1>&2

  cd ./migrations
  git add --all
  git commit -m "$migration"
  git push
fi

echo "$migration"