Unzip budget-app v7 into repo root

budget-app/backup/backup.sh

@@ -0,0 +1,48 @@
+#!/bin/sh
+# Dumps the database once at start, every day at BACKUP_TIME (HH:MM, container time zone), and whenever
+# the api asks for one through /requests (it does so before every database upgrade).
+set -eu
+: "${BACKUP_TIME:=02:30}"
+: "${BACKUP_KEEP_DAYS:=30}"
+mkdir -p /backups /requests
+chmod 1777 /requests
+rm -f /tmp/first-backup-done
+
+dump() {
+  file="/backups/budget_$(date +%Y%m%d_%H%M%S)${1:-}.sql.gz"
+  if pg_dump --no-owner --clean --if-exists | gzip > "$file.tmp"; then
+    mv "$file.tmp" "$file"
+    echo "$(date -Iseconds) backup written: $file"
+    find /backups -name 'budget_*.sql.gz' -mtime +"$BACKUP_KEEP_DAYS" -delete
+    return 0
+  fi
+  rm -f "$file.tmp"
+  echo "$(date -Iseconds) backup FAILED" >&2
+  return 1
+}
+
+answer_requests() {
+  for request in /requests/*.request; do
+    [ -e "$request" ] || continue
+    id=$(basename "$request" .request)
+    echo "$(date -Iseconds) backup requested: $(cat "$request" 2>/dev/null)"
+    if dump _before_upgrade; then echo ok > "/requests/$id.done"; else echo failed > "/requests/$id.done"; fi
+    rm -f "$request"
+  done
+  # answers nobody picked up
+  find /requests -name '*.done' -mmin +60 -delete 2>/dev/null || true
+}
+
+until pg_isready -q; do sleep 2; done
+dump || true
+touch /tmp/first-backup-done
+while true; do
+  now=$(date +%s)
+  next=$(date -d "$(date +%Y-%m-%d) $BACKUP_TIME" +%s 2>/dev/null || date -D '%Y-%m-%d %H:%M' -d "$(date +%Y-%m-%d) $BACKUP_TIME" +%s)
+  [ "$next" -le "$now" ] && next=$((next + 86400))
+  while [ "$(date +%s)" -lt "$next" ]; do
+    answer_requests
+    sleep 5
+  done
+  dump || true
+done

budget-app/backup/restore.sh

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+#!/bin/sh
+# Usage (from the project folder):  docker compose exec backup restore.sh /backups/budget_YYYYMMDD_HHMMSS.sql.gz
+set -eu
+file="${1:?give the backup file, e.g. /backups/budget_20270101_023000.sql.gz}"
+echo "Restoring $file into database $PGDATABASE ..."
+gunzip -c "$file" | psql -q -v ON_ERROR_STOP=1
+echo "Done. Restart the api container: docker compose restart api"