fix: psql should exit nonzero on failure

scripts/diff.sh

@@ -28,14 +28,8 @@ if [[ ! -f "$migration" ]]; then
   
   echo "migrate from $rev => HEAD" 1>&2
 
-  echo "do language plpgsql \$migration\$" >> "$migration"
-  echo "begin" >> "$migration"
-  echo >> "$migration"
   migra --unsafe $base_url $head_url >> "$migration" \
     || echo "migra exited with code $?. this is /probably/ fine" 1>&2
-  echo >> "$migration"
-  echo "end;" >> "$migration"
-  echo '$migration$;' >> "$migration"
 fi
 
 echo "$migration"

scripts/migrate.sh

@@ -26,7 +26,7 @@ else
   migration_file=$(./scripts/diff.sh "$last_revision")
 
   if [[ "$2" = "--greenlight" ]]; then
-    psql "$POSTGRES_URI/dnim" -f "$migration_file"
+    psql "$POSTGRES_URI/dnim" -v ON_ERROR_STOP=1 --single-transaction -f "$migration_file"
   else
     echo "migration available at $migration_file"
     echo "review and rerun with --greenlight to apply"