The 31 containers/<app>/<app>.sh files each defined install<App>() with
the SAME 10-step sequence — ~4,000 lines of duplicated boilerplate.
Replaces all that with one generic driver + hook surface.
scripts/app/install/app_install.sh:
installApp <slug> [config_variables]
— Dispatches on $<slug> (c/u/s/r/i) the same way the per-app .sh
files did. Same convention; dockerInstallApp's existing
`declare $app=i` callsite needs no change.
— Runs the standard sequence: dockerConfigSetupToContainer →
dockerComposeSetupFile → optional .env copy → fixPermissions →
dockerComposeUpdateAndStartApp → standard post-install steps
(appUpdateSpecifics, setupHeadscale, databaseInstallApp,
webuiContainerSetup, monitoring registration) → final message.
— Hooks (all declare-f-gated, silent no-op when absent):
<slug>_install_pre / _post_setup / _post_compose / _post_start
<slug>_install_message_data (echoes extra args for menu)
<slug>_install_post
<slug>_uninstall_pre / _post
<slug>_stop_post
<slug>_restart_post
Hooks live in containers/<app>/tools/<app>_tools.sh (auto-sourced
per the modular-per-app-tools convention).
function_install_app.sh:
When no install<App>() function exists, fall through to
`installApp <app_name>` instead of erroring. So an app with no .sh
at all becomes a zero-byte addition — drop in <app>.config +
docker-compose.yml + <app>.svg, done.
containers/linkding/linkding.sh:
Deleted (canary). Linkding's body was 100% standard sequence;
fallback handles it identically. Smoke-tested with stubbed helpers
— dispatcher fires, generic runs full flow, monitoring integration
+ final-message hook plumbing all intact.
Wave B (next): delete the .sh for every other 'pure-boilerplate' app
(~15 candidates per the survey). Wave C: extract custom logic from
the 7 fat apps into hooks before deleting their .sh.
Signed-off-by: librelad <librelad@digitalangels.vip>