`occ app:enable app` should not install app

⚠️ 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

occ app:enable should not install an app that is not already installed, and should instead throw an error message.

Steps to reproduce

1. check that thisApp is not already installed
2. occ app:install thisApp
3. see that thisApp is now installed

Expected behavior

If thisApp is not already installed, then occ app:enable thisApp should not install it but instead report an error.

Installation method

Community Docker image

Nextcloud Server version

25

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.2

Web server

Apache (supported)

Database engine version

MySQL

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

None

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

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

Configuration report

{
    "system": {
        "htaccess.RewriteBase": "\/",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "apps_paths": [
            {
                "path": "\/var\/www\/html\/apps",
                "url": "\/apps",
                "writable": false
            },
            {
                "path": "\/var\/www\/html\/custom_apps",
                "url": "\/custom_apps",
                "writable": true
            }
        ],
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "password": "***REMOVED SENSITIVE VALUE***",
            "port": 6379
        },
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "localhost",
            "jhaas.cloud.4next.ch"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "25.0.7.1",
        "overwrite.cli.url": "https:\/\/jhaas.cloud.4next.ch",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "default_language": "fr",
        "default_locale": "fr_CH",
        "mail_smtpmode": "smtp",
        "mail_smtpauthtype": "LOGIN",
        "mail_smtpsecure": "tls",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "587",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpauth": 1,
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "overwriteprotocol": "https",
        "loglevel": 2,
        "maintenance": false,
        "default_phone_region": "CH",
        "skeletondirectory": "\/var\/www\/html\/data\/nouvelUtilisateur\/",
        "oidc_login_provider_url": "https:\/\/auth.4next.ch\/auth\/realms\/jhaas",
        "oidc_login_client_id": "nextcloud",
        "oidc_login_client_secret": "40a7dfa3-4f20-48a4-a707-e82a00c3e8de",
        "oidc_login_logout_url": "https:\/\/auth.4next.ch\/auth\/realms\/jhaas\/protocol\/openid-connect\/logout?redirect_uri=https%3A%2F%2Fjhaas.cloud.4next.ch%2F",
        "oidc_login_disable_registration": false,
        "allow_user_to_change_display_name": false,
        "lost_password_link": "disabled",
        "oidc_login_hide_password_form": true,
        "oidc_create_groups": true,
        "oidc_login_auto_redirect": true,
        "oidc_login_redir_fallback": true,
        "oidc_login_attributes": {
            "id": "preferred_username",
            "mail": "email",
            "groups": "roles"
        },
        "theme": ""
    }
}

List of activated Apps

Enabled:
  - activity: 2.17.0
  - approval: 1.1.0
  - calendar: 4.4.3
  - circles: 25.0.0
  - cloud_federation_api: 1.8.0
  - collectives: 2.6.1
  - comments: 1.15.0
  - contacts: 5.3.2
  - dashboard: 7.5.0
  - dav: 1.24.0
  - deck: 1.8.5
  - federatedfilesharing: 1.15.0
  - federation: 1.15.0
  - files: 1.20.1
  - files_downloadactivity: 1.16.0
  - files_pdfviewer: 2.6.0
  - files_rightclick: 1.4.0
  - files_sharing: 1.17.0
  - files_trashbin: 1.15.0
  - files_versions: 1.18.0
  - firstrunwizard: 2.14.0
  - forms: 3.3.1
  - groupfolders: 13.1.4
  - logreader: 2.10.0
  - lookup_server_connector: 1.13.0
  - nextcloud_announcements: 1.14.0
  - notifications: 2.13.1
  - oauth2: 1.13.0
  - oidc_login: 2.6.0
  - onlyoffice: 7.8.0
  - password_policy: 1.15.0
  - photos: 2.0.1
  - polls: 5.2.0
  - privacy: 1.9.0
  - provisioning_api: 1.15.0
  - quicknotes: 0.8.5
  - related_resources: 1.0.4
  - serverinfo: 1.15.0
  - settings: 1.7.0
  - sharebymail: 1.15.0
  - snappymail: 2.28.4
  - spreed: 15.0.7
  - support: 1.8.0
  - survey_client: 1.13.0
  - systemtags: 1.15.0
  - tasks: 0.15.0
  - text: 3.6.0
  - theming: 2.0.1
  - twofactor_backupcodes: 1.14.0
  - updatenotification: 1.15.0
  - user_status: 1.5.0
  - viewer: 1.9.0
  - weather_status: 1.5.0
  - welcome: 1.0.8
  - workflowengine: 2.7.0
Disabled:
  - admin_audit
  - bruteforcesettings
  - contactsinteraction: 1.2.0
  - encryption
  - files_external: 1.12.0
  - rainloop: 7.2.6
  - recommendations: 0.8.0
  - suspicious_login
  - twofactor_totp
  - user_ldap

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

No response

Additional info

No response

Start by locating the occ app:enable command entry point and run it with an app that is installed and one that is absent. Compare the resulting behavior with occ app:install; done means enabling never installs a missing app and reports an error instead.