[Bug]: `occ files:sanitize-filenames --dry-run` out of memory fatal error

[mgallien]

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

When running occ files:sanitize-filenames --dry-run, after some time, the command crash with a fatal error.
see
PHP Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 20480 bytes) in <path>/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php on line 131

Steps to reproduce

1. cd
2. sudo -u php ./occ files:sanitize-filenames --dry-run`

Expected behavior

the command completes the dry run

Nextcloud Server version

31

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.3

Web server

Apache (supported)

Database engine version

MariaDB

Is this bug present after an update or on a fresh install?

None

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

List of activated Apps

Nextcloud Signing status

Nextcloud Logs

Additional info

No response

[joshtrichards]

A fair number of files presumably?

We may be able to take some lessons from the existing Scanner implementation (and possibly even make some optimizations there as well while we're at it).

[susnux]

Work around:

for user in $(./occ user:list | grep -Po "(?<=\\s-\\s)[^:]+"); do
    ./occ files:sanitize --dry-run "$user"
done