fix: support manually fiddling with migrations

.gitignore

@@ -1,3 +1,4 @@
 .env
 data
 tmp
+migrations

scripts/diff.sh

@@ -1,25 +1,38 @@
 #! /bin/bash
 
-set -ex
+set -e
 
 source ./scripts/env.sh ./.env.schema
 
-rev=${1:-}
+rev=$(echo "$1" | xargs)
+head=$(git show --format=format:%h -q | xargs)
+migration="./migrations/${rev}_to_${head}.sql"
 
 head_url=postgresql://$POSTGRES_USER:$POSTGRES_PASSWORD@localhost:5432/dnim
 base_url=postgresql://$POSTGRES_USER:$POSTGRES_PASSWORD@localhost:5433/dnim
 
 if [[ -z "$rev" ]]; then
-  echo "revision to diff is required";
+  echo "revision to diff is required" 1>&2;
   exit 1;
 fi
 
-docker compose up -d
+docker compose up -d 1>&2
 
-./scripts/build.sh $rev
+rm -r ./migrations || true
-./scripts/build.sh HEAD
+git fetch --all 1>&2
+git restore ./migrations --source origin/manual_migrations 1>&2
 
-echo "migrate from $rev => HEAD" 1>&2
+if [[ ! -f "$migration" ]]; then
-migra --unsafe $base_url $head_url || echo "migra exited with code $?. this is /probably/ fine" 1>&2
+  ./scripts/build.sh "$rev"
+  ./scripts/build.sh HEAD
+  
+  echo "migrate from $rev => HEAD" 1>&2
 
-docker compose down
+  migra --unsafe $base_url $head_url \
+    || echo "migra exited with code $?. this is /probably/ fine" 1>&2 \
+    > "$migration"
+fi
+
+echo "$migration"
+
+docker compose down 1>&2

scripts/migrate.sh

@@ -1,6 +1,6 @@
 #! /bin/bash
 
-set -xe
+set -e
 
 source ./scripts/env.sh ./.env
 
@@ -23,16 +23,13 @@ if [[ "$dnim_database_count" = "0" ]]; then
 else
   get_last_revision="copy (select to_revision from migration order by performed_on desc limit 1) to stdout with null as '';"
   last_revision=$(psql "$POSTGRES_URI/dnim" -c "$get_last_revision")
-  script=$(./scripts/diff.sh "$last_revision")
+  migration_file=$(./scripts/diff.sh "$last_revision")
 
   if [[ "$1" = "--greenlight" ]]; then
-    psql "$POSTGRES_URI/dnim" -c "$script"
+    psql "$POSTGRES_URI/dnim" -f "$migration_file"
   else
-    mkdir -p tmp
+    echo "migration available at $migration_file"
-    to_review="tmp/migrate_${last_revision}_to_${head}.sql"
+    echo "review and rerun with --greenlight to apply"
-    echo "$script" > "$to_review"
-    echo "script written to $to_review"
-    echo "review and rerun with --greenlight to apply migration"
     exit
   fi
 fi