Sample

tools/pgimport/README.md

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+# pgimport
+
+Migrates ntfy data from SQLite to PostgreSQL.
+
+## Build
+
+```bash
+go build -o pgimport ./tools/pgimport/
+```
+
+## Usage
+
+```bash
+# Using CLI flags
+pgimport \
+  --database-url "postgres://user:pass@host:5432/ntfy?sslmode=require" \
+  --cache-file /var/cache/ntfy/cache.db \
+  --auth-file /var/lib/ntfy/user.db \
+  --web-push-file /var/lib/ntfy/webpush.db
+
+# Using server.yml (flags override config values)
+pgimport --config /etc/ntfy/server.yml
+```
+
+## Prerequisites
+
+- PostgreSQL schema must already be set up (run ntfy with `database-url` once)
+- ntfy must not be running during the import
+- All three SQLite files are optional; only the ones specified will be imported
+
+## Notes
+
+- The tool is idempotent and safe to re-run
+- After importing, row counts and content are verified against the SQLite sources
+- Invalid UTF-8 in messages is replaced with the Unicode replacement character