fix: add diff, env

.gitignore

@@ -1 +1,2 @@
 .env
+tmp

scripts/build.sh

@@ -1,9 +1,11 @@
 #! /usr/bin/bash
 
+source ./scripts/env.sh
+
 rev=${1:-HEAD}
 
 if [[ -n $(git status --porcelain) ]]; then
-  echo "git working tree dirty";
+  echo "git working tree dirty" 1>&2;
   exit 1;
 fi
 
@@ -12,18 +14,28 @@ if [[ "$rev" = "HEAD" ]]; then
   port=5432
 else
   head=$(git show --format=format:%h -q)
-  git reset "$rev"
+  git reset "$rev" --quiet --hard
   port=5433
 fi
 
-while read line; do export $line; done < ./.env
+switch_back_to_head() {
+  if [[ -n "$head" ]]; then
+    git reset --quiet --hard "$head"
+  fi
+}
+trap 'switch_back_to_head' EXIT
 
-url=postgres://$POSTGRES_USER:$POSTGRES_PASSWORD@localhost:$port/$POSTGRES_DB
+url=postgresql://$POSTGRES_USER:$POSTGRES_PASSWORD@localhost:$port/$POSTGRES_DB
 
-psql --echo-all $url --command="drop schema public cascade; create schema public;"
+psql \
+  --quiet \
+  $url \
+  --command="drop schema public cascade; create schema public;" \
+  1>/dev/null
 
-ls ./migrations/ | xargs -I{} psql --echo-all $url --file=./migrations/{}
-
-if [[ -n "$head" ]]; then
-  git reset "$head"
-fi
+ls ./migrations/ | xargs -I{} \
+   psql \
+   --quiet \
+   $url \
+   --file=./migrations/{} \
+   1>/dev/null

scripts/diff.sh

@@ -0,0 +1,23 @@
+#! /usr/bin/bash
+
+set -e
+
+source ./scripts/env.sh
+
+rev=${1:-}
+
+head_url=postgresql://$POSTGRES_USER:$POSTGRES_PASSWORD@localhost:5432/$POSTGRES_DB
+base_url=postgresql://$POSTGRES_USER:$POSTGRES_PASSWORD@localhost:5433/$POSTGRES_DB
+
+if [[ -z "$rev" ]]; then
+  echo "revision to diff is required";
+  exit 1;
+fi
+
+docker compose up -d
+
+./scripts/build.sh $rev
+./scripts/build.sh HEAD
+
+echo "migrate from $rev => HEAD" 1>&2
+migra $base_url $head_url

scripts/env.sh

@@ -0,0 +1,3 @@
+#! /usr/bin/bash
+
+while read line; do export $line; done < ./.env