Feature Suggestion: nc-previews.sh throws exception "Command "preview:pre-generate" is not defined" if Preview Generator app is not enabled.

[ptandler]

I noticed that I had the preview generator ap disabled and therefore got this exception:

Running nc-previews


In Application.php line 720:
                                                                  
  [Symfony\Component\Console\Exception\CommandNotFoundException]  
  Command "preview:pre-generate" is not defined.                  
                                                                  
  Did you mean one of these?                                      
      notification:generate                                       
      preview:generate                                            
      preview:repair                                              
      preview:reset-rendered-texts                                
                                                                  

Exception trace:
  at /var/www/nextcloud/3rdparty/symfony/console/Application.php:720
 Symfony\Component\Console\Application->find() at /var/www/nextcloud/3rdparty/symfony/console/Application.php:259
 Symfony\Component\Console\Application->doRun() at /var/www/nextcloud/3rdparty/symfony/console/Application.php:171
 Symfony\Component\Console\Application->run() at /var/www/nextcloud/lib/private/Console/Application.php:213
 OC\Console\Application->run() at /var/www/nextcloud/console.php:100
 require_once() at /var/www/nextcloud/occ:11

It took me a bit to figure out why these commands were missing, so maybe you could add the hint that the Preview Generator app needs to be installed and enabled and / or maybe check it's status and offer to install and enable the app.

System information

NextcloudPi diagnostics

NextcloudPi version  v1.55.2
NextcloudPi image    NextCloudPi_RaspberryPi_v1.50.3.img
OS                   Debian GNU/Linux 11. 6.1.21-v8+ (aarch64)
automount            yes
USB devices          sda 
datadir              /media/myCloudDrive/ncdata/data
data in SD           no
data filesystem      btrfs
data disk usage      788G/1,9T
rootfs usage         12G/29G
swapfile             /var/swap
dbdir                /media/myCloudDrive/ncdatabase
Nextcloud check      ok
Nextcloud version    28.0.10.1
HTTPD service        up
PHP service          up
MariaDB service      up
Redis service        up
HPB service          up
Postfix service      up
Internet check       ok
Public IPv4          ***REMOVED SENSITIVE VALUE***
Public IPv6          ***REMOVED SENSITIVE VALUE***
Port 80              closed
Port 443             closed
IP                   ***REMOVED SENSITIVE VALUE***
Gateway              ***REMOVED SENSITIVE VALUE***
Interface            eth0
Certificates         ***REMOVED SENSITIVE VALUE***
NAT loopback         no
Uptime               57min

Nextcloud configuration

{
    "system": {
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": {
            "0": "localhost",
            "7": "nextcloudpi",
            "5": "nextcloudpi.local",
            "8": "nextcloudpi.lan",
            "3": "nextcloudpi",
            "11": "2001:16b8:b523:6600:109b:e152:beba:f390",
            "1": "192.168.178.36",
            "14": "nextcloudpi"
        },
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "28.0.10.1",
        "overwrite.cli.url": "https:\/\/nextcloudpi\/",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword-new-2023-01": "8UU43BDvMWEPyZ6OWrzR50B3m8ovU6ezPVWuxIUxWhQ=",
        "dbpassword-correct": "4Ek\/MrVBVLgbUH3YqamLee4Kr48vcWMt4dNc07bjT40=",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 0,
            "timeout": 0,
            "password": "***REMOVED SENSITIVE VALUE***"
        },
        "tempdirectory": "\/media\/myCloudDrive\/ncdata\/data\/tmp",
        "mail_smtpmode": "smtp",
        "mail_smtpauthtype": "LOGIN",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "preview_max_x": "2048",
        "preview_max_y": "2048",
        "jpeg_quality": "60",
        "overwriteprotocol": "https",
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "loglevel": "2",
        "log_type": "file",
        "htaccess.RewriteBase": "\/",
        "logfile": "\/media\/myCloudDrive\/ncdata\/data\/nextcloud.log",
        "maintenance": false,
        "theme": "",
        "default_phone_region": "DE",
        "mail_sendmailmode": "smtp",
        "mail_smtpsecure": "tls",
        "mail_smtpauth": 1,
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "587",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "maintenance_window_start": 1
    }
}

[theCalcaholic]

Nextcloudpi actually takes care of installing and enabling the app - but maybe it got automatically disabled when updating to a version of Nextcloud that was not yet officially supported by NCP?