CLI to export/import any database to/from SQLite (#2496)

* CLI to export/import any database to/from SQLite

Require PHP 5.5+ https://github.com/FreshRSS/FreshRSS/pull/2495

* Travis

* Execution rights

* Fix wrong static fields

* Fix MySQL bad default buffering

https://stackoverflow.com/questions/6895098/pdo-mysql-memory-consumption-with-large-result-set/6935271#6935271
https://php.net/manual/ref.pdo-mysql

* Fix count on progression

* Avoid static DB information

To ease working with two DBs at the same time

* Less static, simplify

Needs some testing

* Small corrections

* Special case for SQLite to SQLite

* Modify special case for SQLite

* Remove special case for SQLite

More uniform logic for the 3 databases.
Fix wrong DROP TABLE for SQLite.

* Drop indexes

* Revert "Drop indexes"

This reverts commit f28d2bae0935745c1c74ea38f2ee083f3fd4bf9d.

* Fix deletion

* Fix classic export

* Update cli/README.md

Co-Authored-By: Marien Fressinaud <dev@marienfressinaud.fr>

* Addressing part of review

* Remove goto :cry:

* Travis

* Comment for SQLite case

* Fix missing fields when inserting

1 files changed, 28 insertions, 0 deletions

diff --git a/cli/export-sqlite-for-user.php b/cli/export-sqlite-for-user.php
new file mode 100755
index 000000000..027d13f38
--- /dev/null
+++ b/cli/export-sqlite-for-user.php
@@ -0,0 +1,28 @@
+#!/usr/bin/php
+<?php
+require(__DIR__ . '/_cli.php');
+
+$params = [
+	'user:',
+	'filename:',
+];
+
+$options = getopt('', $params);
+
+if (!validateOptions($argv, $params) || empty($options['user']) || empty($options['filename'])) {
+	fail('Usage: ' . basename(__FILE__) . ' --user username --filename /path/to/db.sqlite');
+}
+
+$username = cliInitUser($options['user']);
+$filename = $options['filename'];
+
+if (pathinfo($filename, PATHINFO_EXTENSION) !== 'sqlite') {
+	fail('Only *.sqlite files are supported!');
+}
+
+echo 'FreshRSS exporting database to SQLite for user “', $username, "”…\n";
+
+$databaseDAO = FreshRSS_Factory::createDatabaseDAO($username);
+$ok = $databaseDAO->dbCopy($filename, FreshRSS_DatabaseDAO::SQLITE_EXPORT);
+
+done($ok);